Journal of chemical technology and biotechnology最新文献_第8页

COSMO-RS prediction, liquid–liquid equilibrium experiment and quantum chemical calculation to separate n-hexane and n-propanol azeotropic system with ionic liquids COSMO-RS预测、液-液平衡实验和量子化学计算分离正己烷和正丙醇共沸体系与离子液体

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-22 DOI: 10.1002/jctb.70051

Chi Jin, Dongxiang Zhang, Siyi Han, Yu Sheng, Hua Xin, Qinqin Zhang, Zhigang Zhang

BACKGROUND

n-Hexane and n-propanol (NPA) are frequently used for drug synthesis. During the synthesis of fenbufen drug eutectic, n-hexane and NPA will form an azeotrope; separation of the azeotrope by conventional distillation techniques is extremely difficult. However, it can be achieved by liquid–liquid extraction.

RESULTS

In this study, the Conductor-like Screening Model for Real Solvents (COSMO-RS) was employed to screen ionic liquids (ILs) for separating the n-hexane–NPA azeotrope. The liquid–liquid equilibrium (LLE) data of the ternary n-hexane–NPA–IL systems were determined under atmospheric pressure at 303.15 K. The data were correlated using the non-random two-liquid model. The root-mean-square deviation and binary interaction parameters were acquired, and the parameters were validated using the ‘GMcal_TieLinesLL’ tool of the MATLAB program to meet the Gibbs stability criterion. Besides, quantum chemical calculations were conducted, including interaction energy, electrostatic potential analysis, independent gradient model based on Hirshfeld partition analysis and quantum theory of atoms in the molecule topological analysis.

CONCLUSION

LLE experiments showed the extraction efficiency of the ILs: Three ILs were identified as promising extractants: 1-ethyl-3-methylimidazolium trifluoroacetate ([C₂MIM][TFA]), 1-butyl-3-methylimidazolium trifluoroacetate ([C₄MIM][TFA]) and 1-hexyl-3-methylimidazolium trifluoroacetate ([C₆MIM][TFA]). Extraction performance follows the order [C₂MIM][TFA] > [C₄MIM][TFA] > [C₆MIM][TFA]. Quantum chemical calculations demonstrated that ILs and NPA are more inclined to form hydrogen bonds. The process simulation was conducted using Aspen Plus V11. © 2025 Society of Chemical Industry (SCI).

正己烷和正丙醇（NPA）是常用的药物合成材料。在合成芬布芬药物共晶过程中，正己烷与NPA会形成共沸物；用常规蒸馏技术分离共沸物是非常困难的。然而，它可以通过液-液萃取来实现。结果本研究采用真实溶剂类导体筛选模型（cosmos - rs）筛选离子液体（ILs），用于分离正己烷- npa共沸物。在303.15 K常压下测定了三元正己烷- npa - il体系的液-液平衡（LLE）数据。数据使用非随机双液体模型进行关联。通过MATLAB程序中的“GMcal_TieLinesLL”工具验证了各参数均方差和二元相互作用参数满足Gibbs稳定性准则。并进行了量子化学计算，包括相互作用能、静电势分析、基于Hirshfeld配分分析的独立梯度模型以及分子拓扑分析中原子的量子理论。结论LLE实验表明，三种萃取剂分别为：1-乙基-3-甲基咪唑三氟乙酸酯（[C2MIM][TFA]）、1-丁基-3-甲基咪唑三氟乙酸酯（[C4MIM][TFA]）和1-己基-3-甲基咪唑三氟乙酸酯（[C6MIM][TFA]）。萃取性能的顺序为[C2MIM][TFA] >； [C4MIM][TFA] > [C6MIM][TFA]。量子化学计算表明，il和NPA更倾向于形成氢键。采用Aspen Plus V11软件进行了工艺模拟。©2025化学工业学会（SCI）。

{"title":"COSMO-RS prediction, liquid–liquid equilibrium experiment and quantum chemical calculation to separate n-hexane and n-propanol azeotropic system with ionic liquids","authors":"Chi Jin, Dongxiang Zhang, Siyi Han, Yu Sheng, Hua Xin, Qinqin Zhang, Zhigang Zhang","doi":"10.1002/jctb.70051","DOIUrl":"https://doi.org/10.1002/jctb.70051","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p><i>n</i>-Hexane and <i>n</i>-propanol (NPA) are frequently used for drug synthesis. During the synthesis of fenbufen drug eutectic, <i>n</i>-hexane and NPA will form an azeotrope; separation of the azeotrope by conventional distillation techniques is extremely difficult. However, it can be achieved by liquid–liquid extraction.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In this study, the Conductor-like Screening Model for Real Solvents (COSMO-RS) was employed to screen ionic liquids (ILs) for separating the <i>n</i>-hexane–NPA azeotrope. The liquid–liquid equilibrium (LLE) data of the ternary <i>n</i>-hexane–NPA–IL systems were determined under atmospheric pressure at 303.15 K. The data were correlated using the non-random two-liquid model. The root-mean-square deviation and binary interaction parameters were acquired, and the parameters were validated using the ‘GMcal_TieLinesLL’ tool of the MATLAB program to meet the Gibbs stability criterion. Besides, quantum chemical calculations were conducted, including interaction energy, electrostatic potential analysis, independent gradient model based on Hirshfeld partition analysis and quantum theory of atoms in the molecule topological analysis.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>LLE experiments showed the extraction efficiency of the ILs: Three ILs were identified as promising extractants: 1-ethyl-3-methylimidazolium trifluoroacetate ([C<sub>2</sub>MIM][TFA]), 1-butyl-3-methylimidazolium trifluoroacetate ([C<sub>4</sub>MIM][TFA]) and 1-hexyl-3-methylimidazolium trifluoroacetate ([C<sub>6</sub>MIM][TFA]). Extraction performance follows the order [C<sub>2</sub>MIM][TFA] > [C<sub>4</sub>MIM][TFA] > [C<sub>6</sub>MIM][TFA]. Quantum chemical calculations demonstrated that ILs and NPA are more inclined to form hydrogen bonds. The process simulation was conducted using Aspen Plus V11. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 11","pages":"2402-2416"},"PeriodicalIF":2.4,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stable aerobic granulation for the selection of a mixed culture producing polyhydroxyalkanoates at high phenol loads 稳定的好氧颗粒剂用于选择在高酚负荷下生产聚羟基烷酸酯的混合培养

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-22 DOI: 10.1002/jctb.70046

Georgina Berretta Invernizzi, Ana M Ferro Orozco, Noemí E Zaritzky, Alejandro H Caravelli

Background

Polyhydroxyalkanoate (PHA) production by pure culture or activated sludge (AS) using phenolic compounds is constrained by their toxicity against dispersed bacteria and flocs. Aerobic granular sludge (AGS) is a promising option for mitigating inhibition; however, achieving stable PHA-producing AGS from phenol constitutes a challenge.

Results

In the present study, aerobic granulation and accumulation of intracellular carbon reserve were evaluated in laboratory-scale sequential batch reactors (24 h cycle), inoculated with AS at different phenol loads and aeration rates. At upflow air velocity of 1.9 cm s⁻¹, acclimation with a mixed carbon source (acetate, phenol) was achieved. At 500 mg (L d)⁻¹ with phenol as the only carbon source and food/microorganism (F/M) ratio of 0.7 C-mmol (C-mmol)⁻¹, the reactor showed stable microgranules (mean diameter of 150 μm) but low PHA production. At 750 mg (L d)⁻¹, F/M ratio increased to 1.5 improving the PHA production (200 mg L⁻¹); however, granule disintegration led to sequential batch reactor failure. At low aeration rate (0.9 cm s⁻¹), larger granules (300 μm) with greater reactor stability were achieved at 750 mg (L d)⁻¹ (F/M = 0.5); however, glycogen was mainly accumulated (y_Gly/S = 0.24, yield per substrate unit, COD units). At 1000 mg (L d)⁻¹ (F/M = 1.5), the highest PHA production (270 mg L⁻¹, 16.3 wt%) and yield (y_PHA/S = 0.23) were achieved, although the effluent quality fluctuated. PHA was identified as polyhydroxybutyrate using DSC, FTIR and NMR techniques.

Conclusion

High F/M ratio allowed the selection of PHA-producing AGS with phenol uptake turned towards PHA synthesis rather than microbial growth or glycogen storage. Phenol toxicity was attenuated by the development of larger granules at low shear forces. © 2025 Society of Chemical Industry (SCI).

酚类化合物在纯培养或活性污泥中生产聚羟基烷酸酯（PHA）受到其对分散细菌和絮凝体的毒性的限制。好氧颗粒污泥（AGS）是缓解抑制的有希望的选择；然而，从苯酚中获得稳定的产生pha的AGS是一个挑战。结果在实验室规模的顺序间歇式反应器（24 h循环）中，接种不同苯酚负荷和曝气率的AS，评估了好氧造粒和细胞内碳储备的积累。在上升气流速度为1.9 cm s - 1的条件下，采用混合碳源（乙酸、苯酚）驯化。在500 mg (L d)−1时，以苯酚为唯一碳源，食物/微生物（F/M）比为0.7 C-mmol (C-mmol)−1，反应器表现出稳定的微颗粒（平均直径为150 μm），但PHA产量较低。在750 mg (L d)−1时，F/M比增加到1.5，提高了PHA的产量（200 mg L−1）；然而，颗粒崩解导致了连续间歇式反应器的失效。在低曝气速率（0.9 cm s−1）下，750 mg (L d)−1 （F/M = 0.5）时可获得较大的颗粒（300 μm），反应器稳定性更好；糖原主要以积累为主（yGly/S = 0.24，每底物单位产率，COD单位）。在1000 mg (L d)−1 （F/M = 1.5）时，达到了最高的PHA产量（270 mg L−1,16.3 wt%）和产量（yPHA/S = 0.23），尽管出水质量有所波动。通过DSC、FTIR和NMR鉴定PHA为聚羟基丁酸酯。结论高F/M比值有利于选择产生PHA的AGS，其对苯酚的吸收倾向于PHA合成而非微生物生长或糖原储存。在低剪切力下形成较大的颗粒，从而减弱苯酚的毒性。©2025化学工业学会（SCI）。

{"title":"Stable aerobic granulation for the selection of a mixed culture producing polyhydroxyalkanoates at high phenol loads","authors":"Georgina Berretta Invernizzi, Ana M Ferro Orozco, Noemí E Zaritzky, Alejandro H Caravelli","doi":"10.1002/jctb.70046","DOIUrl":"https://doi.org/10.1002/jctb.70046","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Polyhydroxyalkanoate (PHA) production by pure culture or activated sludge (AS) using phenolic compounds is constrained by their toxicity against dispersed bacteria and flocs. Aerobic granular sludge (AGS) is a promising option for mitigating inhibition; however, achieving stable PHA-producing AGS from phenol constitutes a challenge.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>In the present study, aerobic granulation and accumulation of intracellular carbon reserve were evaluated in laboratory-scale sequential batch reactors (24 h cycle), inoculated with AS at different phenol loads and aeration rates. At upflow air velocity of 1.9 cm s<sup>−1</sup>, acclimation with a mixed carbon source (acetate, phenol) was achieved. At 500 mg (L d)<sup>−1</sup> with phenol as the only carbon source and food/microorganism (F/M) ratio of 0.7 C-mmol (C-mmol)<sup>−1</sup>, the reactor showed stable microgranules (mean diameter of 150 μm) but low PHA production. At 750 mg (L d)<sup>−1</sup>, F/M ratio increased to 1.5 improving the PHA production (200 mg L<sup>−1</sup>); however, granule disintegration led to sequential batch reactor failure. At low aeration rate (0.9 cm s<sup>−1</sup>), larger granules (300 μm) with greater reactor stability were achieved at 750 mg (L d)<sup>−1</sup> (F/M = 0.5); however, glycogen was mainly accumulated (<i>y</i><sub>Gly/S</sub> = 0.24, yield per substrate unit, COD units). At 1000 mg (L d)<sup>−1</sup> (F/M = 1.5), the highest PHA production (270 mg L<sup>−1</sup>, 16.3 wt%) and yield (<i>y</i><sub>PHA/S</sub> = 0.23) were achieved, although the effluent quality fluctuated. PHA was identified as polyhydroxybutyrate using DSC, FTIR and NMR techniques.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>High F/M ratio allowed the selection of PHA-producing AGS with phenol uptake turned towards PHA synthesis rather than microbial growth or glycogen storage. Phenol toxicity was attenuated by the development of larger granules at low shear forces. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 11","pages":"2337-2356"},"PeriodicalIF":2.4,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145243039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sorption and desorption behavior of hydroxychloroquine and ivermectin in WWTP sludge: kinetic and equilibrium insights 羟氯喹和伊维菌素在污水处理厂污泥中的吸附和解吸行为：动力学和平衡的见解

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-20 DOI: 10.1002/jctb.70047

Bruna Giovana Locatelli, Juliane Maria Bergamin Bocardi, Ismael Laurindo Costa Junior, Adelmo Lowe Pletsch

BACKGROUND

Domestic sewage is one of the main pathways for the introduction of pharmaceutical contaminants into environmental compartments. During the COVID-19 pandemic, the consumption of medications such as hydroxychloroquine (HCQ) and ivermectin (IVM) increased significantly, resulting in a greater presence of these substances in ecosystems. Considering the existing knowledge gaps regarding the environmental impacts and ecological behavior of these compounds during this period, this study aimed to investigate the sorption and desorption kinetics and equilibrium of HCQ and IVM in sludge from domestic wastewater treatment plants (WWTPs).

RESULTS

The pseudo-second-order model best fit the kinetic sorption data for both HCQ (R² = 0.91–0.99) and IVM (R² = 0.94–0.99), indicating that chemisorption may be the dominant mechanism. Equilibrium data were better described by the Langmuir isotherm (R² = 0.85–0.99 for HCQ and R² = 0.94–0.99 for IVM), suggesting monolayer adsorption on a homogeneous surface. The highest specific sorption capacities observed were 20.04 mg g⁻¹ for HCQ and 23.29 mg g⁻¹ for IVM. The maximum desorption percentage was 49.15% for HCQ, while no desorption of IVM was detected under experimental conditions.

CONCLUSION

Both analytes exhibited sorptive interactions with sewage sludge, with IVM demonstrating a stronger affinity. The findings highlight concerns about the persistence and accumulation of pharmaceutical contaminants in the environment due to discharges from WWTPs. © 2025 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

生活污水是将药物污染物引入环境隔间的主要途径之一。在2019冠状病毒病大流行期间，羟氯喹（HCQ）和伊维菌素（IVM）等药物的消费量显著增加，导致生态系统中这些物质的含量增加。考虑到这一时期对这些化合物的环境影响和生态行为的现有知识空白，本研究旨在研究生活污水处理厂（WWTPs）污泥中HCQ和IVM的吸附和解吸动力学和平衡。结果拟二阶模型与HCQ （R2 = 0.91 ~ 0.99）和IVM （R2 = 0.94 ~ 0.99）的吸附动力学数据拟合最佳，表明化学吸附可能是主要吸附机理。Langmuir等温线（R2 = 0.85-0.99, IVM = 0.94-0.99）更好地描述了平衡数据，表明单层吸附在均匀表面上。HCQ和IVM的最高比吸附量分别为20.04 mg g−1和23.29 mg g−1。HCQ的最大解吸率为49.15%，而IVM在实验条件下没有解吸。结论两种分析物均与污泥表现出吸附相互作用，其中IVM表现出更强的亲和力。研究结果强调了人们对污水处理厂排放的药物污染物在环境中持续存在和积累的担忧。©2025作者。由John Wiley &； Sons Ltd代表美国化学工业学会（SCI）出版的化学技术与生物技术杂志。

{"title":"Sorption and desorption behavior of hydroxychloroquine and ivermectin in WWTP sludge: kinetic and equilibrium insights","authors":"Bruna Giovana Locatelli, Juliane Maria Bergamin Bocardi, Ismael Laurindo Costa Junior, Adelmo Lowe Pletsch","doi":"10.1002/jctb.70047","DOIUrl":"https://doi.org/10.1002/jctb.70047","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Domestic sewage is one of the main pathways for the introduction of pharmaceutical contaminants into environmental compartments. During the COVID-19 pandemic, the consumption of medications such as hydroxychloroquine (HCQ) and ivermectin (IVM) increased significantly, resulting in a greater presence of these substances in ecosystems. Considering the existing knowledge gaps regarding the environmental impacts and ecological behavior of these compounds during this period, this study aimed to investigate the sorption and desorption kinetics and equilibrium of HCQ and IVM in sludge from domestic wastewater treatment plants (WWTPs).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The pseudo-second-order model best fit the kinetic sorption data for both HCQ (<i>R</i><sup>2</sup> = 0.91–0.99) and IVM (<i>R</i><sup>2</sup> = 0.94–0.99), indicating that chemisorption may be the dominant mechanism. Equilibrium data were better described by the Langmuir isotherm (<i>R</i><sup>2</sup> = 0.85–0.99 for HCQ and <i>R</i><sup>2</sup> = 0.94–0.99 for IVM), suggesting monolayer adsorption on a homogeneous surface. The highest specific sorption capacities observed were 20.04 mg g<sup>−1</sup> for HCQ and 23.29 mg g<sup>−1</sup> for IVM. The maximum desorption percentage was 49.15% for HCQ, while no desorption of IVM was detected under experimental conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Both analytes exhibited sorptive interactions with sewage sludge, with IVM demonstrating a stronger affinity. The findings highlight concerns about the persistence and accumulation of pharmaceutical contaminants in the environment due to discharges from WWTPs. © 2025 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 11","pages":"2357-2370"},"PeriodicalIF":2.4,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of polyacrylonitrile-based nanofiber mats by electrospinning for uranium recovery 静电纺丝法制备用于铀回收的聚丙烯腈基纳米纤维垫

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-19 DOI: 10.1002/jctb.70042

Sündüz Alemdar, Nursel Pekel Bayramgil

BACKGROUND

Seawater mining of uranium in a sustainable manner is an emerging approach to meet long-term nuclear energy requirements. Amidoxime-functionalized polymers are of particular interest because of their high binding affinity for uranyl ions. Nevertheless, their low reusability and low mechanical stability make them impractical. This study discusses the preparation and performance evaluation of amidoxime-functionalized electrospun polyacrylonitrile (PAN) and polyurethane (PU) nanofiber mats as adsorbents for uranium (VI) adsorption.

RESULTS

PAN and PU blends were electrospun into composite nanofiber mats, which were amidoximated for nitrile groups. Structural, morphological, and thermal analyses were carried out by FT-IR, SEM, XRD, TGA, and DSC analyses. Amidoxime conversion was established by FT-IR with 94% efficiency. Uranium adsorption experiments in pH 4.1 and 25 °C conditions showed the maximum capacity of 435 mg g⁻¹ for PU-PAO nanofibers. Although pure PAO mats had a slightly higher capacity (495 mg g⁻¹), they could not be recycled easily. This contrasts with PU-PAO mats, which did not lose their integrity and could be cycled up to six times without losing their performance substantially.

CONCLUSION

PU addition improved mechanical stability and handleability without compromising the high adsorption capability of amidoxime-functionalized nanofibers. These findings validate the use of PU-PAO composite nanofibers as efficient and sustainable adsorbents for uranium recovery from aqueous systems, like seawater. Their performance vs. durability ratio presents a promising direction towards industrially viable and scalable uranium recovery technologies. © 2025 Society of Chemical Industry (SCI).

以可持续的方式海水开采铀是满足长期核能需求的一种新兴方法。偕胺肟功能化聚合物因其对铀酰离子的高结合亲和力而受到特别关注。然而，它们的低可重用性和低机械稳定性使它们不切实际。研究了偕胺肟功能化聚丙烯腈（PAN）和聚氨酯（PU）纳米纤维毡的制备及其吸附铀（VI）的性能评价。结果PAN和PU共混物经静电纺丝制成复合纳米纤维垫，并对其腈基进行氨基肟化处理。通过FT-IR、SEM、XRD、TGA和DSC对其进行了结构、形态和热分析。红外光谱法测定偕胺肟的转化率为94%。在pH 4.1和25℃条件下，PU-PAO纳米纤维吸附铀的最大容量为435 mg g−1。虽然纯PAO垫具有略高的容量（495 mg g−1），但它们不容易回收。这与PU-PAO垫形成对比，PU-PAO垫不会失去其完整性，并且可以循环多达六次而不会大大降低其性能。结论PU的加入在不影响偕胺肟功能化纳米纤维高吸附性能的前提下，提高了纳米纤维的力学稳定性和可操作性。这些发现验证了PU-PAO复合纳米纤维作为有效和可持续的吸附剂从水系统（如海水）中回收铀。它们的性能与耐久性比为工业上可行和可扩展的铀回收技术提供了一个有希望的方向。©2025化学工业学会（SCI）。

{"title":"Preparation of polyacrylonitrile-based nanofiber mats by electrospinning for uranium recovery","authors":"Sündüz Alemdar, Nursel Pekel Bayramgil","doi":"10.1002/jctb.70042","DOIUrl":"https://doi.org/10.1002/jctb.70042","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Seawater mining of uranium in a sustainable manner is an emerging approach to meet long-term nuclear energy requirements. Amidoxime-functionalized polymers are of particular interest because of their high binding affinity for uranyl ions. Nevertheless, their low reusability and low mechanical stability make them impractical. This study discusses the preparation and performance evaluation of amidoxime-functionalized electrospun polyacrylonitrile (PAN) and polyurethane (PU) nanofiber mats as adsorbents for uranium (VI) adsorption.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>PAN and PU blends were electrospun into composite nanofiber mats, which were amidoximated for nitrile groups. Structural, morphological, and thermal analyses were carried out by FT-IR, SEM, XRD, TGA, and DSC analyses. Amidoxime conversion was established by FT-IR with 94% efficiency. Uranium adsorption experiments in pH 4.1 and 25 °C conditions showed the maximum capacity of 435 mg g<sup>−1</sup> for PU-PAO nanofibers. Although pure PAO mats had a slightly higher capacity (495 mg g<sup>−1</sup>), they could not be recycled easily. This contrasts with PU-PAO mats, which did not lose their integrity and could be cycled up to six times without losing their performance substantially.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>PU addition improved mechanical stability and handleability without compromising the high adsorption capability of amidoxime-functionalized nanofibers. These findings validate the use of PU-PAO composite nanofibers as efficient and sustainable adsorbents for uranium recovery from aqueous systems, like seawater. Their performance <i>vs.</i> durability ratio presents a promising direction towards industrially viable and scalable uranium recovery technologies. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 11","pages":"2299-2308"},"PeriodicalIF":2.4,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impregnation of Fe 2 O 3 / Ce O 2 onto activated carbon surface for the electrochemical degradation of oxytetracycline 活性炭表面浸渍fe2o3 / ceo2电化学降解土霉素的研究

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-18 DOI: 10.1002/jctb.70041

Ameni Ayadi, Federica Proietto, Ahmed Hichem Hamzaoui, Mouna Jaouadi

BACKGROUND

Antibiotic residues are persisting against biological degradation, so their presence is considered dangerous in both low and high concentrations. The removal of antibiotic pollutants by electrochemical degradation using a modified activated carbon has attracted tremendous attention.

RESULTS

Granular activated carbon was modified with iron and cerium oxide. Electrochemical degradation of oxytetracycline was studied using a modified activated carbon as an electrode. The composite was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and by measuring of the pH of the point of zero charge. These techniques confirmed that the oxide was immobilized onto the activated carbon surface. Electrochemical degradation was determined under different conditions, such as pH, the nature and concentration of the supporting electrolyte, current density and anode type. When NaCl was used as a supporting electrolyte 98% degradation was achieved, but only 60% degradation was achieved when Na₂SO₄ was used as an electrolyte, under optimal conditions: a current density of 60 mA cm⁻², pH 3, a treatment time of 180 min and a boron-doped diamond counter-electrode. Full use of the catalytic properties of activated carbon modified by iron–cerium oxide gives a high production of ^•OH, and highly efficient degradation of oxytetracycline was observed.

CONCLUSION

The advancements hold significant implications for environmental engineering and science, as they pave the way for more efficient electrodes. This research not only demonstrated a new kind of modified activated carbon as an effective catalyst but also offers an avenue for efficient degradation using a carbon electrode. © 2025 Society of Chemical Industry (SCI).

抗生素残留在生物降解过程中持续存在，因此无论浓度高低都被认为是危险的。改性活性炭电化学降解抗生素污染物的研究引起了广泛的关注。结果用氧化铁和氧化铈对颗粒活性炭进行了改性。以改性活性炭为电极，对土霉素的电化学降解进行了研究。通过扫描电子显微镜、x射线衍射、傅里叶变换红外光谱和测量零电荷点的pH值对复合材料进行了表征。这些技术证实了氧化物被固定在活性炭表面。考察了不同条件下的电化学降解情况，如pH、支撑电解质的性质和浓度、电流密度和阳极类型。在最佳条件下：电流密度为60 mA cm−2，pH为3，处理时间为180 min，硼掺杂金刚石反电极，NaCl作为支撑电解质时，降解率为98%，而Na2SO4作为电解质时，降解率仅为60%。充分利用氧化铁-铈改性活性炭的催化性能，使•OH产量高，并对土霉素进行了高效降解。这些进展对环境工程和科学具有重要意义，因为它们为更高效的电极铺平了道路。本研究不仅证明了一种新型改性活性炭作为一种有效的催化剂，而且为利用碳电极进行高效降解提供了一条途径。©2025化学工业学会（SCI）。

{"title":"Impregnation of \u0000 \u0000 \u0000 Fe\u0000 2\u0000 \u0000 \u0000 O\u0000 3\u0000 \u0000 /\u0000 Ce\u0000 \u0000 O\u0000 2\u0000 \u0000 onto activated carbon surface for the electrochemical degradation of oxytetracycline","authors":"Ameni Ayadi, Federica Proietto, Ahmed Hichem Hamzaoui, Mouna Jaouadi","doi":"10.1002/jctb.70041","DOIUrl":"10.1002/jctb.70041","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Antibiotic residues are persisting against biological degradation, so their presence is considered dangerous in both low and high concentrations. The removal of antibiotic pollutants by electrochemical degradation using a modified activated carbon has attracted tremendous attention.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Granular activated carbon was modified with iron and cerium oxide. Electrochemical degradation of oxytetracycline was studied using a modified activated carbon as an electrode. The composite was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and by measuring of the pH of the point of zero charge. These techniques confirmed that the oxide was immobilized onto the activated carbon surface. Electrochemical degradation was determined under different conditions, such as pH, the nature and concentration of the supporting electrolyte, current density and anode type. When NaCl was used as a supporting electrolyte 98% degradation was achieved, but only 60% degradation was achieved when Na<sub>2</sub>SO<sub>4</sub> was used as an electrolyte, under optimal conditions: a current density of 60 mA cm<sup>−2</sup>, pH 3, a treatment time of 180 min and a boron-doped diamond counter-electrode. Full use of the catalytic properties of activated carbon modified by iron–cerium oxide gives a high production of <sup>•</sup>OH, and highly efficient degradation of oxytetracycline was observed.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The advancements hold significant implications for environmental engineering and science, as they pave the way for more efficient electrodes. This research not only demonstrated a new kind of modified activated carbon as an effective catalyst but also offers an avenue for efficient degradation using a carbon electrode. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2230-2240"},"PeriodicalIF":2.4,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biorefinery development and environmental impact assessment using two-phase exhausted olive pomace for the production of succinic acid and phenolic-rich extract 利用两相废橄榄渣生产琥珀酸和富酚提取物的生物精炼厂开发和环境影响评价

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-15 DOI: 10.1002/jctb.70044

Evanthia Georgiadou, Stamatia Skoutida, Katiana Filippi, Sofia-Maria Ioannidou, Georgios F. Banias, Apostolis Koutinas

BACKGROUND

This study presents the development of a biorefinery concept using exhausted olive pomace (EOP) for the production of a crude phenolic-rich extract and succinic acid.

RESULTS

The crude phenolic-rich extract was obtained by ultrasound-assisted extraction using 70% (v/v) aqueous ethanol with a phenolic content of 1.22 g gallic acid equivalents (GAE) 100 g⁻¹ EOP (dry basis), an antioxidant capacity of 7.42 μg mL⁻¹ extract (based on DPPH), and an antioxidant activity index of 4.15. Alkaline treatment of the remaining solids with 1% (w/v) NaOH at 90 °C led to 63.9% lignin removal in the liquid fraction, while 87.9% of the initial glucan and 83.4% of the initial xylan remained in the pretreated solids. The hydrolysis efficiency of glucan and xylan corresponded to 42.8% and 42.9%, respectively. Subsequent fermentation with Actinobacillus succinogenes produced 28.1 g L⁻¹ succinic acid with 0.63 g g⁻¹ yield and 0.59 g/(L h) productivity. Life cycle assessment of the biorefinery showed a global warming potential of 0.79 kg CO₂-eq kg⁻¹ dry EOP and an abiotic depletion potential of 14.53 MJ kg⁻¹ dry EOP.

CONCLUSION

The proposed biorefinery could produce 245 g crude phenolic-rich extract and 60 g succinic acid from 1 kg EOP. The remaining solids (136.8 g lignin and 439.9 g post-hydrolysis remaining solids) could be incinerated for energy generation in the olive pomace mill to support the drying of wet olive pomace with up to 10% moisture content. This study demonstrates a sustainable alternative process for the valorization of EOP within an integrated olive pomace mill. © 2025 Society of Chemical Industry (SCI).

本研究提出了利用废橄榄渣（EOP）生产富含酚的粗提取物和琥珀酸的生物精炼概念的发展。结果采用70% （v/v）乙醇超声辅助提取，得到的粗酚含量为1.22 g没食子酸当量（GAE） 100 g−1 EOP（干基），抗氧化能力为7.42 μg mL−1（基于DPPH），抗氧化活性指数为4.15。用1% (w/v) NaOH在90℃下对剩余固体进行碱性处理，液体部分木质素去除率为63.9%，而预处理固体中初始葡聚糖的去除率为87.9%，初始木聚糖的去除率为83.4%。葡聚糖和木聚糖的水解效率分别为42.8%和42.9%。随后用琥珀酸放线杆菌发酵产生28.1 g L−1琥珀酸，产率0.63 g g−1，产率0.59 g/(L h)。生物精炼厂的生命周期评估显示，全球变暖潜势为0.79 kg co2当量kg−1干EOP，非生物耗竭潜势为14.53 MJ kg−1干EOP。结论该生物精制工艺可从1 kg EOP中提取245 g富酚粗提物和60 g琥珀酸。剩余固体（136.8 g木质素和439.9 g水解后剩余固体）可以在橄榄渣厂焚烧发电，以支持湿橄榄渣的干燥，水分含量高达10%。本研究展示了一个可持续的替代过程，在一个综合橄榄渣厂的EOP增值。©2025化学工业学会（SCI）。

{"title":"Biorefinery development and environmental impact assessment using two-phase exhausted olive pomace for the production of succinic acid and phenolic-rich extract","authors":"Evanthia Georgiadou, Stamatia Skoutida, Katiana Filippi, Sofia-Maria Ioannidou, Georgios F. Banias, Apostolis Koutinas","doi":"10.1002/jctb.70044","DOIUrl":"https://doi.org/10.1002/jctb.70044","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study presents the development of a biorefinery concept using exhausted olive pomace (EOP) for the production of a crude phenolic-rich extract and succinic acid.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The crude phenolic-rich extract was obtained by ultrasound-assisted extraction using 70% (v/v) aqueous ethanol with a phenolic content of 1.22 g gallic acid equivalents (GAE) 100 g<sup>−1</sup> EOP (dry basis), an antioxidant capacity of 7.42 μg mL<sup>−1</sup> extract (based on DPPH), and an antioxidant activity index of 4.15. Alkaline treatment of the remaining solids with 1% (w/v) NaOH at 90 °C led to 63.9% lignin removal in the liquid fraction, while 87.9% of the initial glucan and 83.4% of the initial xylan remained in the pretreated solids. The hydrolysis efficiency of glucan and xylan corresponded to 42.8% and 42.9%, respectively. Subsequent fermentation with <i>Actinobacillus succinogenes</i> produced 28.1 g L<sup>−1</sup> succinic acid with 0.63 g g<sup>−1</sup> yield and 0.59 g/(L h) productivity. Life cycle assessment of the biorefinery showed a global warming potential of 0.79 kg CO<sub>2</sub>-eq kg<sup>−1</sup> dry EOP and an abiotic depletion potential of 14.53 MJ kg<sup>−1</sup> dry EOP.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The proposed biorefinery could produce 245 g crude phenolic-rich extract and 60 g succinic acid from 1 kg EOP. The remaining solids (136.8 g lignin and 439.9 g post-hydrolysis remaining solids) could be incinerated for energy generation in the olive pomace mill to support the drying of wet olive pomace with up to 10% moisture content. This study demonstrates a sustainable alternative process for the valorization of EOP within an integrated olive pomace mill. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 11","pages":"2309-2324"},"PeriodicalIF":2.4,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eco-efficient recovery of non-volatile products from fermentation broth: aliphatic diols 从发酵液中高效回收非挥发性产物：脂肪族二醇

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-12 DOI: 10.1002/jctb.70040

Tamara Janković, Adrie J. J. Straathof, Siddhant Sharma, Anton A. Kiss

Fermentation can be used to obtain a wide variety of valuable high-boiling components. Among these components, microorganisms can produce aliphatic diols (e.g. propanediols, butanediols, etc.) in significant concentrations (e.g. 5–15 wt.%). Nonetheless, the high boiling points of these components, presence of microorganisms, and formation of by-products complicate recovery after fermentation. Hence, this perspective offers valuable insights into downstream processing options. A novel methodology was developed for recovering high-boiling components from dilute aqueous solutions, whereby both light and heavy impurities are present. The main steps in the proposed methodology are heat pump-assisted preconcentration and final purification in a dividing-wall column. These steps allow effective separation of high-purity product from water, light and heavy impurities. Furthermore, processes for recovery of 1,3-propanediol, 2,3-, 1,4- and 1,3-butanediol, designed according to the proposed methodology, were compared. Downstream processing performance is mainly determined by the product concentration in the fermentation broth, but is also influenced by the amount of impurities in the broth. © 2025 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

发酵可用于获得各种有价值的高沸点成分。在这些成分中，微生物可以产生显著浓度（例如5 - 15wt .%）的脂肪族二醇（例如丙二醇、丁二醇等）。然而，这些成分的高沸点、微生物的存在和副产品的形成使发酵后的恢复变得复杂。因此，这个视角为下游处理选项提供了有价值的见解。开发了一种新的方法，用于从稀水溶液中回收高沸点组分，其中存在轻杂质和重杂质。所提出的方法的主要步骤是热泵辅助的预浓缩和在分隔墙柱中的最终净化。这些步骤可以有效地将高纯度产品与水、轻杂质和重杂质分离。此外，比较了根据所提方法设计的1,3-丙二醇、2,3-、1,4-和1,3-丁二醇的回收工艺。下游加工性能主要由发酵液中的产物浓度决定，但也受发酵液中杂质含量的影响。©2025作者。由John Wiley &； Sons Ltd代表美国化学工业学会（SCI）出版的化学技术与生物技术杂志。

{"title":"Eco-efficient recovery of non-volatile products from fermentation broth: aliphatic diols","authors":"Tamara Janković, Adrie J. J. Straathof, Siddhant Sharma, Anton A. Kiss","doi":"10.1002/jctb.70040","DOIUrl":"https://doi.org/10.1002/jctb.70040","url":null,"abstract":"<p>Fermentation can be used to obtain a wide variety of valuable high-boiling components. Among these components, microorganisms can produce aliphatic diols (e.g. propanediols, butanediols, etc.) in significant concentrations (e.g. 5–15 wt.%). Nonetheless, the high boiling points of these components, presence of microorganisms, and formation of by-products complicate recovery after fermentation. Hence, this perspective offers valuable insights into downstream processing options. A novel methodology was developed for recovering high-boiling components from dilute aqueous solutions, whereby both light and heavy impurities are present. The main steps in the proposed methodology are heat pump-assisted preconcentration and final purification in a dividing-wall column. These steps allow effective separation of high-purity product from water, light and heavy impurities. Furthermore, processes for recovery of 1,3-propanediol, 2,3-, 1,4- and 1,3-butanediol, designed according to the proposed methodology, were compared. Downstream processing performance is mainly determined by the product concentration in the fermentation broth, but is also influenced by the amount of impurities in the broth. © 2025 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 11","pages":"2245-2250"},"PeriodicalIF":2.4,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing biogas production from water hyacinth juice through biochar addition in an upflow anaerobic sludge blanket reactor 通过在上流式厌氧污泥毯式反应器中添加生物炭提高水葫芦汁的沼气产量

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-12 DOI: 10.1002/jctb.70039

Gemechu Kassaye, Nigus Gabbiye, Eshetu Getahun, Shin-ichi Akizuki, Zenamarkos Bantie, Pranshu Bhatia, Masaaki Fujiwara, Solomon Addisu, Shinjiro Sato

BACKGROUND

Recently, sequential crushing and compression pretreatment of water hyacinth has gained attention for its ability in removing recalcitrant lignocellulose components and extract easily from biodegradable water hyacinth juice, facilitating rapid anaerobic digestion (AD) systems. In this work, AD experiments were performed in lab-scale upflow anaerobic sludge blanket (UASB) reactors using water hyacinth juice as a substrate. To ensure the stability and enhance performance of AD, a batch experiment was performed to select the carbonization temperature and biochar size. The selected biochar was then added to the reactor and compared with the control reactor. The reactors were continuously operated for 65 days to evaluate the treatment efficiency under different hydraulic retention times (HRTs) (4, 2, and 1 days).

RESULTS

A carbonization temperature of 800 °C with a particle size of 1.58 mm was found to have a higher specific surface area of 519.538 m² g⁻¹ and a better pore size of 0.078 mL g⁻¹. Biogas yields were similar between reactors with and without biochar: 208 ± 86, 370 ± 93, and 393 ± 73 mL g-VS⁻¹ (with biochar) and 218 ± 88, 375 ± 107, and 400 ± 74 mL g-VS⁻¹ (without biochar) at 4, 2, and 1-day HRTs, respectively. However, biochar addition improved methane quality, increasing methane content from 78.11% to 81.64% and reducing CO₂ from 21.89% to 18.54%. Both systems achieved high soluble chemical oxygen demand (COD) removal at 1 day HRT: 87.1% with biochar and 85.9% without.

CONCLUSION

近年来，水葫芦的连续破碎和压缩预处理因其能够去除难降解的木质纤维素成分，并容易从可生物降解的水葫芦汁中提取，促进快速厌氧消化（AD）系统而受到关注。在这项工作中，AD实验在实验室规模的上流式厌氧污泥毯（UASB）反应器中进行，使用水葫芦汁作为底物。为了保证活性炭的稳定性和提高活性炭的性能，对活性炭的炭化温度和炭粒度进行了批量实验。然后将选定的生物炭添加到反应器中，并与对照反应器进行比较。反应器连续运行65 d，以评价不同水力停留时间（hrt）（4、2、1 d）下的处理效果。结果碳化温度为800℃，粒径为1.58 mm时，炭化产物的比表面积为519.538 m2 g−1，孔径为0.078 mL g−1。在有生物炭和没有生物炭的反应器中，沼气产量相似：在4、2和1天的hrt下，g-VS - 1（含生物炭）分别为208±86、370±93和393±73 mL， g-VS - 1（无生物炭）分别为218±88、375±107和400±74 mL。然而，添加生物炭改善了甲烷质量，甲烷含量从78.11%提高到81.64%，二氧化碳含量从21.89%降低到18.54%。在HRT为1天的情况下，两种系统都实现了高可溶性化学需氧量（COD）去除率：有生物炭时达到87.1%，无生物炭时达到85.9%。结论在AD系统中添加生物炭在提高稳定性和产生高质量甲烷产量方面具有多种益处。©2025化学工业学会（SCI）。

{"title":"Enhancing biogas production from water hyacinth juice through biochar addition in an upflow anaerobic sludge blanket reactor","authors":"Gemechu Kassaye, Nigus Gabbiye, Eshetu Getahun, Shin-ichi Akizuki, Zenamarkos Bantie, Pranshu Bhatia, Masaaki Fujiwara, Solomon Addisu, Shinjiro Sato","doi":"10.1002/jctb.70039","DOIUrl":"https://doi.org/10.1002/jctb.70039","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Recently, sequential crushing and compression pretreatment of water hyacinth has gained attention for its ability in removing recalcitrant lignocellulose components and extract easily from biodegradable water hyacinth juice, facilitating rapid anaerobic digestion (AD) systems. In this work, AD experiments were performed in lab-scale upflow anaerobic sludge blanket (UASB) reactors using water hyacinth juice as a substrate. To ensure the stability and enhance performance of AD, a batch experiment was performed to select the carbonization temperature and biochar size. The selected biochar was then added to the reactor and compared with the control reactor. The reactors were continuously operated for 65 days to evaluate the treatment efficiency under different hydraulic retention times (HRTs) (4, 2, and 1 days).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>A carbonization temperature of 800 °C with a particle size of 1.58 mm was found to have a higher specific surface area of 519.538 m<sup>2</sup> g<sup>−1</sup> and a better pore size of 0.078 mL g<sup>−1</sup>. Biogas yields were similar between reactors with and without biochar: 208 ± 86, 370 ± 93, and 393 ± 73 mL g-<i>VS</i><sup>−1</sup> (with biochar) and 218 ± 88, 375 ± 107, and 400 ± 74 mL g-<i>VS</i><sup>−1</sup> (without biochar) at 4, 2, and 1-day HRTs, respectively. However, biochar addition improved methane quality, increasing methane content from 78.11% to 81.64% and reducing CO<sub>2</sub> from 21.89% to 18.54%. Both systems achieved high soluble chemical oxygen demand (COD) removal at 1 day HRT: 87.1% with biochar and 85.9% without.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The results indicate that addition of biochar into AD systems offers multiple benefits in enhancing stability and producing a high-quality methane yield. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 11","pages":"2289-2298"},"PeriodicalIF":2.4,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intensifying hydrogenotrophic methanogenesis in electrode-assisted UASB reactor under room-temperature conditions 电极辅助UASB反应器在室温条件下强化氢营养化甲烷生成

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-08 DOI: 10.1002/jctb.70036

Tania P. Mendoza-Tinoco, María del Carmen Fajardo-Ortiz, Ulises Durán-Hinojosa, Víctor Sánchez-Vázquez, Ignacio González, Ricardo Beristain-Cardoso

BACKGROUND

Anaerobic digestion is a widely used and cost-effective technology for wastewater treatment and renewable energy recovery through biogas production. However, its efficiency significantly decreases under sub-mesophilic or room-temperature conditions due to the low metabolic activity. Recent approaches have explored electrical stimulation to enhance microbial performance. This study investigates the effect of electrical stimulation via current density (ESCD) on the performance of an upflow anaerobic sludge blanket (UASB) reactor operating at room temperature.

RESULTS

Two 2 L UASB reactors were operated at a 12 h hydraulic retention time using domestic wastewater (chemical oxygen demand: 2 ± 0.1 g L⁻¹). The control reactor (R_C) had no electrodes, whereas the experimental reactor (R_E) was equipped with RuO₂/Ti mesh electrodes, to which a current density of 0.54 mA cm⁻² was applied. R_E showed an 86% increase in biogas production with 68% CH₄, 21% CO₂ and 11% H₂, resembling Hythane. Methane generation shifted toward hydrogenotrophic pathways (65%) over acetoclastic (35%). Compared to the biogas produced by R_C, that from R_E had a 23% higher calorific value and nearly twice the methane yield. Sludge from R_E exhibited a 17% lower sedimentation rate, 44% higher sludge volumetric index, and more compact granules enriched with filamentous microbes (confirmed via scanning electron microscopy). Content of extracellular polymeric substances increased by 52% and was particularly rich in proteins.

CONCLUSION

This study demonstrates, for the first time, that electrical stimulation via current density (0.54 mA cm⁻²) using RuO₂/Ti mesh electrodes in a UASB reactor operating at room temperature can significantly enhance hydrogenotrophic methanogenesis. The electrode-assisted UASB reactor maintained continuous and elevated methane production, presenting a promising single-reactor strategy capable of high performance under room-temperature conditions without the need for external temperature control. © 2025 Society of Chemical Industry (SCI).

厌氧消化是一种广泛应用且具有成本效益的污水处理技术，可通过生产沼气回收可再生能源。然而，在亚中温或室温条件下，由于代谢活性低，其效率显著降低。最近的方法是探索电刺激来提高微生物的性能。本研究探讨了电流密度（ESCD）电刺激对室温下上流式厌氧污泥毯（UASB）反应器性能的影响。结果采用生活废水（化学需氧量为2±0.1 g L−1），水力停留时间为12 h，运行2个2 L的UASB反应器。对照反应器（RC）没有电极，而实验反应器（RE）装有RuO₂/Ti网状电极，施加电流密度为0.54 mA cm−2。RE显示沼气产量增加86%，其中CH4 68%， CO2 21%, H2 11%，与乙烷相似。甲烷生成转向氢营养途径（65%），而不是醋酸分解途径（35%）。与RC生产的沼气相比，RE生产的沼气热值高出23%，甲烷产量几乎是RC生产沼气的两倍。RE污泥的沉降率降低17%，污泥体积指数提高44%，颗粒更致密，富含丝状微生物（通过扫描电子显微镜证实）。细胞外聚合物质含量增加52%，蛋白质含量尤其丰富。本研究首次证明，在室温下运行的UASB反应器中，使用RuO₂/Ti网状电极，通过电流密度（0.54 mA cm−2）进行电刺激，可以显著促进氢营养甲烷生成。电极辅助的UASB反应器保持了连续和高的甲烷产量，展示了一种有前途的单反应器策略，能够在室温条件下实现高性能，而无需外部温度控制。©2025化学工业学会（SCI）。

{"title":"Intensifying hydrogenotrophic methanogenesis in electrode-assisted UASB reactor under room-temperature conditions","authors":"Tania P. Mendoza-Tinoco, María del Carmen Fajardo-Ortiz, Ulises Durán-Hinojosa, Víctor Sánchez-Vázquez, Ignacio González, Ricardo Beristain-Cardoso","doi":"10.1002/jctb.70036","DOIUrl":"10.1002/jctb.70036","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Anaerobic digestion is a widely used and cost-effective technology for wastewater treatment and renewable energy recovery through biogas production. However, its efficiency significantly decreases under sub-mesophilic or room-temperature conditions due to the low metabolic activity. Recent approaches have explored electrical stimulation to enhance microbial performance. This study investigates the effect of electrical stimulation via current density (ESCD) on the performance of an upflow anaerobic sludge blanket (UASB) reactor operating at room temperature.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Two 2 L UASB reactors were operated at a 12 h hydraulic retention time using domestic wastewater (chemical oxygen demand: 2 ± 0.1 g L<sup>−1</sup>). The control reactor (R<sub>C</sub>) had no electrodes, whereas the experimental reactor (R<sub>E</sub>) was equipped with RuO₂/Ti mesh electrodes, to which a current density of 0.54 mA cm<sup>−2</sup> was applied. R<sub>E</sub> showed an 86% increase in biogas production with 68% CH<sub>4</sub>, 21% CO<sub>2</sub> and 11% H<sub>2</sub>, resembling Hythane. Methane generation shifted toward hydrogenotrophic pathways (65%) over acetoclastic (35%). Compared to the biogas produced by R<sub>C</sub>, that from R<sub>E</sub> had a 23% higher calorific value and nearly twice the methane yield. Sludge from R<sub>E</sub> exhibited a 17% lower sedimentation rate, 44% higher sludge volumetric index, and more compact granules enriched with filamentous microbes (confirmed via scanning electron microscopy). Content of extracellular polymeric substances increased by 52% and was particularly rich in proteins.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study demonstrates, for the first time, that electrical stimulation via current density (0.54 mA cm<sup>−2</sup>) using RuO₂/Ti mesh electrodes in a UASB reactor operating at room temperature can significantly enhance hydrogenotrophic methanogenesis. The electrode-assisted UASB reactor maintained continuous and elevated methane production, presenting a promising single-reactor strategy capable of high performance under room-temperature conditions without the need for external temperature control. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2208-2216"},"PeriodicalIF":2.4,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of ZnO/TiO2–biochar from durian husk for efficient dye adsorption and degradation 以榴莲壳为原料合成氧化锌/二氧化钛生物炭对染料的高效吸附和降解

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology

Pub Date : 2025-08-08 DOI: 10.1002/jctb.70038

Tran Minh Khang, Tran Thi Bich Quyen, Luong Huynh Vu Thanh, Ngo Nguyen Tra My, Bui Le Anh Tuan, Duy Toan Pham, Nguyen Thi Kim Lien, Doan Van Hong Thien, Ngo Truong Ngoc Mai

BACKGROUND

The overuse of dyes is causing serious water pollution globally, becoming an urgent environmental problem. Consequently, studying dye wastewater treatment solutions has become a crucial research field. While durian husk biochar (BDH) is recognized for its excellent adsorption of organic molecules, studies on its combination with ZnO and TiO₂ nanoparticles (NPs) and enhancement of methylene blue (MB) degradation remain limited.

RESULTS

In this study, BDH/ZnO/TiO₂ NPs were synthesized via a hydrothermal method using ethanol and ammonia as solvents. BHD was produced through pyrolysis under oxygen-limited conditions and activated with H₃PO₄ to enhance its physicochemical properties. The resulting TiO₂ (anatase phase, 20–35 nm) and ZnO (wurtzite structure, 100–240 nm) were well dispersed on the porous biochar matrix, which exhibited increased porosity (14.761–34.143 Å) and surface area approximately 5.5 times higher than raw biochar. The photocatalytic and adsorption performance of the materials were evaluated under UV irradiation (365 nm, 100 min) using 10 ppm MB. The removal efficiency of BDH achieved 75.77%, significantly outperforming pure TiO₂ (58.52%) and ZnO (40.38%). The novel BDH/ZnO/TiO₂ nanocomposite exhibited superior capabilities, achieving 98.57% removal and maintaining over 95% efficiency after three regeneration cycles. The adsorption of MB by BDH/ZnO/TiO₂ best fits the Freundlich isotherm model, showing a maximum adsorption capacity of 52.21 mg g⁻¹.

CONCLUSION

These results highlight the dual functionality of BDH/ZnO/TiO₂ NPs in dye adsorption and photocatalytic degradation, confirming their potential in wastewater treatment. The study also emphasizes the environmental and economic benefits of valorizing agricultural waste into high-performance, sustainable materials. © 2025 Society of Chemical Industry (SCI).

染料的过度使用在全球范围内造成了严重的水污染，成为一个迫在眉睫的环境问题。因此，染料废水处理方案的研究已成为一个重要的研究领域。虽然榴莲壳生物炭（BDH）因其对有机分子的良好吸附而被公认，但其与ZnO和TiO2纳米颗粒（NPs）结合以及增强亚甲基蓝（MB）降解的研究仍然有限。结果本研究以乙醇和氨为溶剂，水热法制备了BDH/ZnO/TiO2纳米粒子。BHD是在限氧条件下热解生成的，并以H3PO4活化以增强其理化性能。制备的TiO2（锐钛矿相，20 ~ 35 nm）和ZnO（纤锌矿结构，100 ~ 240 nm）在多孔生物炭基体上分散良好，孔隙度（14.761 ~ 34.143 Å）和比表面积约为原生物炭的5.5倍。在10 ppm MB的紫外照射下（365 nm, 100 min），对材料的光催化和吸附性能进行了评价，BDH的去除率达到75.77%，显著优于纯TiO2（58.52%）和ZnO（40.38%）。新型BDH/ZnO/TiO2纳米复合材料表现出优异的去除率，经过3次再生循环后去除率达到98.57%，效率保持在95%以上。BDH/ZnO/TiO2对MB的吸附符合Freundlich等温线模型，最大吸附量为52.21 mg g−1。结论BDH/ZnO/TiO2 NPs具有染料吸附和光催化降解的双重功能，在废水处理中具有一定的应用潜力。该研究还强调了将农业废弃物转化为高性能、可持续材料的环境和经济效益。©2025化学工业学会（SCI）。

{"title":"Synthesis of ZnO/TiO2–biochar from durian husk for efficient dye adsorption and degradation","authors":"Tran Minh Khang, Tran Thi Bich Quyen, Luong Huynh Vu Thanh, Ngo Nguyen Tra My, Bui Le Anh Tuan, Duy Toan Pham, Nguyen Thi Kim Lien, Doan Van Hong Thien, Ngo Truong Ngoc Mai","doi":"10.1002/jctb.70038","DOIUrl":"10.1002/jctb.70038","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The overuse of dyes is causing serious water pollution globally, becoming an urgent environmental problem. Consequently, studying dye wastewater treatment solutions has become a crucial research field. While durian husk biochar (BDH) is recognized for its excellent adsorption of organic molecules, studies on its combination with ZnO and TiO<sub>2</sub> nanoparticles (NPs) and enhancement of methylene blue (MB) degradation remain limited.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In this study, BDH/ZnO/TiO<sub>2</sub> NPs were synthesized via a hydrothermal method using ethanol and ammonia as solvents. BHD was produced through pyrolysis under oxygen-limited conditions and activated with H<sub>3</sub>PO<sub>4</sub> to enhance its physicochemical properties. The resulting TiO<sub>2</sub> (anatase phase, 20–35 nm) and ZnO (wurtzite structure, 100–240 nm) were well dispersed on the porous biochar matrix, which exhibited increased porosity (14.761–34.143 Å) and surface area approximately 5.5 times higher than raw biochar. The photocatalytic and adsorption performance of the materials were evaluated under UV irradiation (365 nm, 100 min) using 10 ppm MB. The removal efficiency of BDH achieved 75.77%, significantly outperforming pure TiO<sub>2</sub> (58.52%) and ZnO (40.38%). The novel BDH/ZnO/TiO<sub>2</sub> nanocomposite exhibited superior capabilities, achieving 98.57% removal and maintaining over 95% efficiency after three regeneration cycles. The adsorption of MB by BDH/ZnO/TiO<sub>2</sub> best fits the Freundlich isotherm model, showing a maximum adsorption capacity of 52.21 mg g<sup>−1</sup>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>These results highlight the dual functionality of BDH/ZnO/TiO<sub>2</sub> NPs in dye adsorption and photocatalytic degradation, confirming their potential in wastewater treatment. The study also emphasizes the environmental and economic benefits of valorizing agricultural waste into high-performance, sustainable materials. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2217-2229"},"PeriodicalIF":2.4,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0