Journal of chemical technology and biotechnology最新文献

{"title":"rGO/BiVO4/MnFe2O4, a novel ternary composite, as an effective photocatalyst for the reduction of nitroaromatic compounds into their amines under visible light","authors":"Ali Oji Moghanlou,&nbsp;Sahar Mohajeri,&nbsp;Nayer Mohammadian Tarighi","doi":"10.1002/jctb.70085","DOIUrl":"https://doi.org/10.1002/jctb.70085","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Regarding the high toxicity and contamination of nitroaromatic compounds, their photocatalytic reduction to their corresponding amino-aromatics is a promising green approach. In the present research, a novel heterogeneous nanocomposite of rGO/BiVO₄/MnFe₂O₄ was synthesized through reduction of graphene oxide and coupling BiVO₄/MnFe₂O₄ binary nanoparticles between graphene oxide layers using hydrothermal method. Structural and morphological properties, as well as optical and photocatalytic activities, of the synthesized nanocomposites were assessed by physico-chemical techniques. Hydrazine monohydrate was used to provide hydrogen.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The results indicated successful reduction of graphene oxide and its coupling with binary nanoparticles of BiVO₄/MnFe₂O₄ between reduced graphene oxide sheets. The synthesized nanocomposites were employed to reduce nitroaromatic pollutants into their corresponding amino-aromatics under visible radiation which showed successful results.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Our study revealed the exceptional photocatalytic performance of the ternary heterogeneous rGO/BiVO₄/MnFe₂O₄ nanocomposite, which achieved complete (100%) conversion of nitrobenzene to aniline in merely 10 min under visible light irradiation. The reaction was conducted using 0.5 mmol nitrobenzene, 50 mg photocatalyst, and 5 mmol hydrazine monohydrate in a 5 mL mixed solvent system (methanol-dichloromethane-acetonitrile, (1:1:1) v/v). A 30 W white LED lamp (λ &gt; 420 nm) served as the light source, with reaction progress monitored by GC–MS analysis. This nanocomposite outperforms previously reported photocatalysts in terms of activity while demonstrating remarkable structural stability and recyclability maintaining consistent efficiency and mass balance even after ten consecutive reuse cycles. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 1","pages":"182-199"},"PeriodicalIF":2.4,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145751133","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}

{"title":"A review on conversion of carbon dioxide (CO2) to methanol and methane by photocatalytic reactors: a comparative analysis with algae-based CO2 sequestration","authors":"J Arun,&nbsp;P Priyadharsini,&nbsp;S Shyam,&nbsp;M Subathra,&nbsp;KP Gopinath,&nbsp;S Nachiappan,&nbsp;S Naveen","doi":"10.1002/jctb.70086","DOIUrl":"https://doi.org/10.1002/jctb.70086","url":null,"abstract":"<p>Carbon dioxide (CO₂) emission due to urbanization and industrialization are the key factors behind global warming and climate changes. United Nations in 2018, stated that, due to CO₂ emissions, earth's temperature would increase 1.5 °C between 2032 and 2050. Variation in climatic conditions will definitely have a huge impact on human health and ecosystem. To mimic the CO₂ emission, various countries have put forward laws and policies. This review focuses primarily on the biological and photocatalytic reduction of CO₂ to valuable products like chemicals and fuels. This review provides valuable information on the reduction of CO₂ to valuable products and benefits the researchers, academics, and industrial personnel on resource recovery concepts. Photo reactor design and operating conditions define the level of CO₂ conversion efficiency. Algae-based CO₂ utilization and recovery of products from algae biomass are explored for biofuel production process. However, the storage capacity of products, bulk processing of CO₂ are needed in future research perspectives. Overall, this study strongly contributes towards achieving sustainable development goals (SDGs). © 2025 Society of Chemical Industry (SCI).</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 2","pages":"241-254"},"PeriodicalIF":2.4,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145969886","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}

{"title":"Synthesis and characterization of lanthanum supported halloysite nanotubes catalyst in obtaining low molecular weight of liquid epoxidized natural rubber","authors":"Nur Najwa Abdul Talib,&nbsp;Noor Hana Hanif Abu Bakar,&nbsp;Mohamad Abu Bakar,&nbsp;Anwar Iqbal,&nbsp;Nurul Hayati Yusof,&nbsp;dan Rosniza Hamzah","doi":"10.1002/jctb.70060","DOIUrl":"https://doi.org/10.1002/jctb.70060","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Lanthanum catalyst supported on halloysite nanotubes (La/HNTs) was explored for the degradation of liquid epoxidized natural rubber (LENR) into low molecular weight LENR (lmw-LENR). The La/HNT catalyst was synthesized using a simple impregnation method and characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy with energy dispersive X-ray (SEM–EDX), X-ray fluorescence (XRF), Fourier-transform infrared spectroscopy (FTIR), and nuclear magnetic resonance (NMR). These techniques were employed to examine the physicochemical properties of the catalyst and to evaluate its performance in LENR degradation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULT</h3>\u0000 \u0000 <p>The characterization revealed the presence of lanthanum hydroxide (La(OH)₃-n) species on the HNT surface. The La/HNTs effectively reduced the average molecular weight of LENR from 26 360 to 6961, corresponding to a 73.6% reduction under optimum conditions of 0.5 g catalyst loading at 150 °C for 4 h in a batch reactor. The degradation mechanism was attributed to hydroxide ions attacking the oxirane ring, leading to chain scission and the formation of shorter LENR chains. NMR and FTIR analyses confirmed the successful ring opening and cleavage of CC bonds, while the catalyst retained its structural integrity. Catalyst performance was strongly influenced by particle size, hydroxyl availability, and metal–support interactions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study demonstrates the efficiency of La/HNT catalysts in promoting LENR degradation <i>via</i> hydroxide-driven chain scission. The significant reduction in molecular weight highlights their potential application in rubber processing and recycling, offering a sustainable approach to valorizing epoxidized rubber materials. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 1","pages":"34-49"},"PeriodicalIF":2.4,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739791","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}

{"title":"Sustainability impacts for converting to Raman spectroscopy inline monitoring from traditional offline manual sampling in small-scale and large-scale biomanufacturing","authors":"Stacy Simon,&nbsp;Phyllis Pugh,&nbsp;Preeya Boppana,&nbsp;Zahra Allen,&nbsp;Jenna Lemons,&nbsp;Veera Padmanabhan","doi":"10.1002/jctb.70084","DOIUrl":"https://doi.org/10.1002/jctb.70084","url":null,"abstract":"<p>As biomanufacturing evolves to meet environmental goals, adopting innovative analytical technologies creates new pathways for sustainable process control. This study examines the impact of replacing traditional offline manual sampling with inline Raman spectroscopy for monitoring critical bioprocess parameters in both small- and large-scale production. Conventional offline methods for measuring glucose, lactate, viable cell density and osmolality rely heavily on single-use plastics and frequent manual handling, leading to increased waste and carbon emissions. Quantitative analysis shows that integrating inline Raman spectroscopy with predictive modeling can eliminate about 13.36 kg of single-use plastic and prevent 80.17 kg of CO₂ emissions per combined run, with potential for greater annual impact. Raman-enabled process analytical technology enables robust, real-time monitoring, with model performance metrics (<i>R</i>² and <i>Q</i>²) consistently above 0.79 for key indicators, while also reducing contamination risk by maintaining closed systems. Although product quality and shipping emissions are not covered in this assessment, these results highlight considerable sustainability, operational and analytical advantages of Raman-based monitoring. Implementing inline Raman spectroscopy advances AstraZeneca's and the industry's carbon neutrality and waste reduction goals, making it a transformative step for responsible bioprocessing. © 2025 AstraZeneca, PLC. <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 1","pages":"7-10"},"PeriodicalIF":2.4,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739830","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}

{"title":"Development and performance evaluation of PES-SiO2 hybrid membranes for domestic wastewater treatment","authors":"Ling Yong Wong,&nbsp;Mohammed J. K. Bashir,&nbsp;Kumar Krishnan,&nbsp;Ling Shing Wong,&nbsp;Nor Faiza Abd Rahman,&nbsp;Khai Shin Chan","doi":"10.1002/jctb.70082","DOIUrl":"https://doi.org/10.1002/jctb.70082","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The escalating global water crisis underscores the urgent need for sustainable and efficient wastewater treatment technologies. This study investigates the use of nanosilica (SiO₂), extracted from rice husk—an abundant agricultural by-product—as a functional additive in polyethersulfone (PES) membranes. Membranes containing varying nanosilica loadings (0, 1, 3, and 5 wt.%) were fabricated <i>via</i> phase inversion and assessed for permeability and pollutant removal efficiency.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Incorporation of nanosilica markedly improved membrane performance, with the 5 wt.% PES–SiO₂ membrane exhibiting a pure water flux of 576.65 L m⁻²·h at 0.8 bar, approximately six times higher than pristine PES (96.85 L m⁻²·h). Pollutant removal was also significantly enhanced, achieving 91% turbidity reduction, 71% color removal, and 58% COD reduction. SEM analysis confirmed that nanosilica addition increased porosity and macrovoid formation, thereby improving hydrophilicity, permeability, and adsorption properties.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Rice husk-derived nanosilica provides a cost-effective and sustainable strategy for advancing membrane technology. By simultaneously enhancing permeability and pollutant removal, this approach leverages agricultural waste valorization to deliver efficient wastewater treatment solutions aligned with global sustainability challenges. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 1","pages":"211-221"},"PeriodicalIF":2.4,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739797","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}

{"title":"Electrolyzer design and process optimization for electrochemical synthesis of high-purity sodium hypochlorite solutions for biomedical applications","authors":"Dmitry Girenko,&nbsp;Bohdan Murashevych,&nbsp;Alexander Velichenko","doi":"10.1002/jctb.70083","DOIUrl":"https://doi.org/10.1002/jctb.70083","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Technologies and preparations that provide a fast and powerful microbicidal effect are vital for the prevention and treatment of infections. Active chlorine compounds, especially sodium hypochlorite (NaOCl), play an important role both as pharmaceuticals and as disinfectants. However, the stringent requirements for biomedical solutions do not allow the use of most traditional technologies for their synthesis. The paper describes the concept, architecture and individual components of an electrolyzer and its optimal operating parameters for obtaining high-purity NaOCl preparations.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The synthesis of target NaOCl solutions is expediently carried out by electrolysis of approx. 9.0 g L⁻¹ NaCl solutions in original flow cells with a coaxial arrangement of electrodes. The optimal anode is a titanium tube with a catalytic RuO₂–IrO₂ coating. The cathode should be made of smooth titanium or of heat-treated platinized titanium. The initial electrolyte must be fed into the cell using a peristaltic pump. At a current load of 2 A and the use of two series-connected cells, the proposed technology ensures the production of 8.7 L h⁻¹ of a solution containing 500 mg L⁻¹ NaOCl and less than 1.0 mg L⁻¹ NaClO₃. An electrolyzer with three flow cells allows for the continuous production at 9.2 L h⁻¹ of a 1000 mg L⁻¹ NaOCl solution containing no more than 6 mg L⁻¹ NaClO₃.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>NaOCl solutions obtained by the proposed technology have characteristics that allow their safe biomedical applications. Experience in their industrial production and biomedical use confirms the correctness of the concept and the high reliability of the developed electrolyzer. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 1","pages":"222-233"},"PeriodicalIF":2.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739629","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}

{"title":"Effects of culture modes on polyglucan accumulation and molecular weight distribution in Galdieria sulphuraria strains","authors":"Carlos A. Montenegro-Herrera,&nbsp;Mariana Manzoni Maroneze,&nbsp;María E. Rodríguez-Alegría,&nbsp;Alfredo Martinez","doi":"10.1002/jctb.70081","DOIUrl":"https://doi.org/10.1002/jctb.70081","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study investigated the effects of different culture modes – autotrophy, mixotrophy and heterotrophy – on polyglucan accumulation and molecular weight distribution in four <i>Galdieria sulphuraria</i> strains. Understanding the impact of these culture modes helps optimize the production of reserve carbohydrates and modify their molecular properties for biotechnological applications.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The mixotrophic cultivation synergistically positively impacted microalgae growth, reserve polyglucan accumulation and productivity. Significant interaction effects between strain and culture mode were observed for all evaluated kinetic parameters, including biomass concentration (<i>P</i> = 9.06E−09), biomass productivity (<i>P</i> = 2.34E−06) and specific growth rate (<i>P</i> = 6.01E–15). The strain <i>G. sulphuraria</i> SAG 107.79 exhibited the highest glycogen accumulation, reaching 20.1% (w/w) under mixotrophic conditions, compared to 13.6% (w/w) and 5.1% (w/w) under heterotrophic and autotrophic modes, respectively. Culture mode also significantly affected the molecular weight distribution of polyglucans. Autotrophic cultures displayed a bimodal distribution, which may indicate the coexistence of α- and β-particle populations, while heterotrophic cultures showed a unimodal profile. The polydispersity index ranged from 1.65 to 9.18, indicating heterogeneity of the molecular weight of the polymer chains. Interestingly, under mixotrophic growth conditions, a high-molecular-weight polymer was obtained compared to the heterotrophic mode.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>These findings emphasize the importance of the culture mode in regulating polyglucan synthesis and molecular characteristics in <i>G. sulphuraria</i> strains for their biotechnological use and further investigation connected with algae cultivation. © 2025 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; 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":"101 1","pages":"200-210"},"PeriodicalIF":2.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70081","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739615","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}

{"title":"Electrochemical oxidation of psychoactive compounds using RuO2/IrO2 electrodes: impacts on neuronal activity and water matrix influence","authors":"Enrico Mendes Saggioro,&nbsp;Bianca Miguel de Souza-Chaves,&nbsp;Morgana Bosio,&nbsp;Maria Emília Quinta-Ferreira,&nbsp;Rosa Quinta-Ferreira,&nbsp;Márcia Dezotti","doi":"10.1002/jctb.70080","DOIUrl":"https://doi.org/10.1002/jctb.70080","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study focuses on utilizing the electrochemical oxidation (EO) process to eliminate psychoactive substances and aims to assess the impact of EO-treated water on the neuronal activity of rat hippocampus (specifically the CA3 region). The effectiveness of the ruthenium–iridium (Ru/Ir) EO process in degrading a mixture of carbamazepine and four benzodiazepines (alprazolam, clonazepam, diazepam and lorazepam) was evaluated in ultrapure (UP) water under various pH levels (ranging from 3 to 10), current densities (30–50 A m⁻²) and electrolyte concentrations (0.5 and 1.0 g L⁻¹ NaCl). Ru/Ir were used as anode materials, with all pharmaceutical compounds initially present at a concentration of 100 μg L⁻¹ in the mixture. Experiments were also conducted with surface water (SW) and municipal wastewater (MWW).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The optimal conditions, achieved at a current density of 50 A m⁻², pH 7 and 1.0 g NaCl L⁻¹, led to complete degradation of the compounds in 5 min. Higher removal efficiency were observed in UP water compared to real matrices, indicating greater competition for radicals in complex compositions. When using MWW, residual pharmaceuticals were detected even after 120 min of reaction. Neurotoxicity studies revealed varying impacts on reactive oxygen species production, with SW-treated solutions showing reversible effects and MWW-treated solutions displaying irreversible increases, highlighting the significance of Ru/Ir electrodes in EO processes.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Overall, this study demonstrates the efficacy of EO using Ru/Ir electrodes for removing psychoactive substances from water sources. Thus, assessments of neurotoxicity can be incorporated into evaluations of treatment process effectiveness, serving as a complement to physicochemical analyses. © 2025 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; 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":"101 1","pages":"173-181"},"PeriodicalIF":2.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145750614","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}

{"title":"Process and model of a chemically buffered supported liquid membrane system for cobalt extraction","authors":"Ken Darcovich,&nbsp;Mauro M Dal-Cin,&nbsp;Ben Yu","doi":"10.1002/jctb.70077","DOIUrl":"https://doi.org/10.1002/jctb.70077","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Cobalt is a valuable metal whose total annual supply from recycling is projected to be 34 000 t by 2030, primarily from batteries. Supported liquid membrane (SLM) technology is emerging as a promising technology alternative to conventional hydrometallurgy for cobalt recovery.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>This work featured the development of a novel physics-based computational fluid dynamics simulation for cobalt extraction from acetate-buffered synthetic Co–Ni solution in a hollow-fiber SLM system. The system involved cobalt and nickel, both at 0.167 mol L⁻¹ initial concentration, sodium acetate buffer at 0.5 mol L⁻¹ and pH adjusted to 5.85 with KOH or H₂SO₄. The process module had 57 m² active surface area with a single fiber modeled as a cylindrical tube of 200 μm in diameter and 0.85 m in length in the Poiseuille flow regime with a total flow rate of 5.5 L min⁻¹. At the fiber wall, an acidic organophosphorus SLM was present, where ion exchange between Co²⁺ and H⁺ occurred. Using experimental cobalt mass transfer rates dependent on Co²⁺concentration and the acetate p<i>K</i>_a, simulation results within 5% of operational data were obtained for outlet Co²⁺concentration and pH. Parametric effects of feed flow rate and buffer concentration were explored to enhance system design and performance.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>The simulation was validated with good fidelity against measurements from an industrial-scale module. The results show near-optimal cobalt recovery possible at the test flow rate, even with sodium acetate buffer at 100 mol m⁻³, about 20% of the trial-run level. The model is sufficiently general and fundamental, thus readily adaptable to other SLM systems. © 2025 His Majesty the King in Right of Canada. <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry (SCI). Reproduced with the permission of the Minister of Innovation, Science, and Economic Development.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 1","pages":"154-164"},"PeriodicalIF":2.4,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70077","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739384","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}

{"title":"Exploring the effect of dissolved organic matter on trimethoprim adsorption by activated sludge at environmentally relevant concentration","authors":"You Ma,&nbsp;Bo-Yu Liu,&nbsp;Tian-Yu Li,&nbsp;Hang Yang,&nbsp;Han Meng,&nbsp;Guo-Xiang Wang,&nbsp;Dong-Lin Li,&nbsp;Yu-Dong Chen,&nbsp;Wen-Ming Xie","doi":"10.1002/jctb.70078","DOIUrl":"https://doi.org/10.1002/jctb.70078","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Dissolved organic matter (DOM) in wastewater treatment systems plays a crucial role in the adsorption removal of antibiotics; however, this adsorption process remains underexplored. In this study, the effect of DOM components (protein, humic substances and polysaccharide) on the adsorption removal of trimethoprim (TMP) by activated sludge at environmentally relevant concentrations was investigated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The humic substance had a positive effect on TMP adsorption, whose adsorption capacity was increased from 6.05 to 10.82 and 7.48 μg g⁻¹ volatile suspended solids (<i>P</i> &lt; 0.05), respectively, when 60 mg L⁻¹ humic acid and fulvic acid were added. The negatively charged protein (30 mg L⁻¹) had an inhibition effect on TMP adsorption process, in which the adsorption capacity was reduced by 24.1% (<i>P</i> &lt; 0.05). However, the positively charged protein had a minor promotional effect. The polysaccharides (10 mg L⁻¹) had a negligible effect on TMP adsorption.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Through infrared and X-ray photoelectron spectroscopy analysis, the hydrogen bond was found to be the main factor governing TMP adsorption by activated sludge with DOM interference. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 1","pages":"165-172"},"PeriodicalIF":2.4,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739818","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}