Pub Date : 2025-02-25DOI: 10.1016/j.ces.2025.121440
Gabriel Salfate, Camila Negrete-Vergara, Julio Sánchez
In this work, lignin was modified to obtain sulfonated methacrylated lignin (LMS). Together with itaconic acid (AITC), polymeric hydrogels were obtained, characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis, and evaluated in water swelling and Cu (II) adsorption. The AITC/LMS materials were obtained by free radical polymerization and behave as hydrogels, swelling up to 300 % their mass in the presence of water. These AITC/LMS polymers can capture Cu (II) ions through both electrostatic attractions and chemisorption according to the PFO, PSO and IPD kinetic models. Also, the Cu (II) sorption followed the Langmuir isotherm model, with qmax of 67 mg/g, showing the effectiveness of employing these AITC/LMS copolymers for Cu (II) removal from water, underscoring its potential as an eco-friendly and efficient material in addressing the challenges associated with heavy metal presence in water systems.
{"title":"Sulfonated methacrylated lignin and itaconic acid hydrogels for Cu (II) removal from water","authors":"Gabriel Salfate, Camila Negrete-Vergara, Julio Sánchez","doi":"10.1016/j.ces.2025.121440","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121440","url":null,"abstract":"In this work, lignin was modified to obtain sulfonated methacrylated lignin (LMS). Together with itaconic acid (AITC), polymeric hydrogels were obtained, characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis, and evaluated in water swelling and Cu (II) adsorption. The AITC/LMS materials were obtained by free radical polymerization and behave as hydrogels, swelling up to 300 % their mass in the presence of water. These AITC/LMS polymers can capture Cu (II) ions through both electrostatic attractions and chemisorption according to the PFO, PSO and IPD kinetic models. Also, the Cu (II) sorption followed the Langmuir isotherm model, with q<sub>max</sub> of 67 mg/g, showing the effectiveness of employing these AITC/LMS copolymers for Cu (II) removal from water, underscoring its potential as an eco-friendly and efficient material in addressing the challenges associated with heavy metal presence in water systems.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"18 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.ces.2025.121438
Yuting Zhou, Hao Wu, Jannat Javed, Caiyun Yang, Yue Quan
The leaching of ferrous iron (Fe2+) and its insufficient regeneration rate are common issues when using Fe2+-derived catalysts in Fenton-like reactions for removing emerging contaminants (ECs), leading to short lifespans and environmental risks. This study potentially addresses these challenges through establishing a reductive sulphur mediated Fe2+ fixation and regeneration mechanism within a waste-activated sludge-derived Fe2+@S-doped sodalite (FSZ) catalyst. The FSZ catalyst effectively activates peracetic acid to produce various reactive species (e.g. hydroxyl radicals, organic radicals and superoxide radicals, singlet oxygen, Fe(IV)), achieving over 99.5 % degradation of dexamethasone under optimised conditions. The S-Fe interaction in FSZ prevents 48.6 % of Fe2+ from leaching and reduces the generated Fe3+ accumulation, thereby extending the catalyst’s lifespan by 26.7 %. Given its superior ECs removal performance alongside effective aluminium and silicon recovery, this work offers a promising approach for contaminants removal, resource recovery, and material valorisation
{"title":"Reductive sulfur mediated Fe2+ fixation and regeneration in valorizing waste activated sludge ash to Fe2+@S-doped sodalite material for emerging contaminants degradation: Performance and mechanism","authors":"Yuting Zhou, Hao Wu, Jannat Javed, Caiyun Yang, Yue Quan","doi":"10.1016/j.ces.2025.121438","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121438","url":null,"abstract":"The leaching of ferrous iron (Fe<sup>2+</sup>) and its insufficient regeneration rate are common issues when using Fe<sup>2+</sup>-derived catalysts in Fenton-like reactions for removing emerging contaminants (ECs), leading to short lifespans and environmental risks. This study potentially addresses these challenges through establishing a reductive sulphur mediated Fe<sup>2+</sup> fixation and regeneration mechanism within a waste-activated sludge-derived Fe<sup>2+</sup>@S-doped sodalite (FSZ) catalyst. The FSZ catalyst effectively activates peracetic acid to produce various reactive species (e.g. hydroxyl radicals, organic radicals and superoxide radicals, singlet oxygen, Fe(IV)), achieving over 99.5 % degradation of dexamethasone under optimised conditions. The S-Fe interaction in FSZ prevents 48.6 % of Fe<sup>2+</sup> from leaching and reduces the generated Fe<sup>3+</sup> accumulation, thereby extending the catalyst’s lifespan by 26.7 %. Given its superior ECs removal performance alongside effective aluminium and silicon recovery, this work offers a promising approach for contaminants removal, resource recovery, and material valorisation","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"24 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.ces.2025.121422
Siyu Wang , Fei Li , Lin Wang , Ruhao Pan , Liang Ma , Yang Yang , Zhendong Luan , Xin Zhang
Complex environments often have irreversible effects on Surface-enhanced Raman scattering (SERS) substrates, so it is very important to design protection devices reasonably. In this paper, a simple and effective SERS substrate protection scheme was proposed. The SERS substrate was assembled on the ROV (Remote-operation Vehicle) “Faxian” and deployed in a cold seep biocenose area. The protection device was crucial for the successful application of the SERS substrate, which effectively adsorbed biological organic molecules such as amino acids and β-carotene. However, the effective detection time for low-concentration biomolecules was short (< 8 min with protection, nearly 0 without), primarily due to high inorganic salt concentrations at the vents. This study highlights the limitation of conventional SERS substrates as single-use sensors in deep-sea in-situ detection. Future designs of in-situ SERS probes should focus on substrate replacement and protection to enable multi-point detection in extreme.
{"title":"Effective protection strategy of Surface-enhanced Raman scattering substrate in deep-sea cold seep in-situ detection","authors":"Siyu Wang , Fei Li , Lin Wang , Ruhao Pan , Liang Ma , Yang Yang , Zhendong Luan , Xin Zhang","doi":"10.1016/j.ces.2025.121422","DOIUrl":"10.1016/j.ces.2025.121422","url":null,"abstract":"<div><div>Complex environments often have irreversible effects on Surface-enhanced Raman scattering (SERS) substrates, so it is very important to design protection devices reasonably. In this paper, a simple and effective SERS substrate protection scheme was proposed. The SERS substrate was assembled on the ROV (Remote-operation Vehicle) “<em>Faxian</em>” and deployed in a cold seep biocenose area. The protection device was crucial for the successful application of the SERS substrate, which effectively adsorbed biological organic molecules such as amino acids and β-carotene. However, the effective detection time for low-concentration biomolecules was short (< 8 min with protection, nearly 0 without), primarily due to high inorganic salt concentrations at the vents. This study highlights the limitation of conventional SERS substrates as single-use sensors in deep-sea in-situ detection. Future designs of in-situ SERS probes should focus on substrate replacement and protection to enable multi-point detection in extreme.</div></div>","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"308 ","pages":"Article 121422"},"PeriodicalIF":4.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.ces.2025.121439
Xiaoyan Zhu, Gang Wang, Yongpeng Sun, Yaling Guo, Liang Dai
The pollution of water bodies by Cu(II) is a significant environmental concern. In this paper, we developed a novel straw-based adsorbent, mercaptopropionyl corn straw (MPCS), by the pretreatment with alkali and the modification sulfhydryl group for effectively removing Cu(II) in aqueous solutions. Some characterization results revealed that the abundant functional groups (—OH, —SH, —NH2, —COOH) on straw played a crucial role in facilitating Cu(II) adsorption onto MPCS. Adsorption experiments were carried out to assess the performance of MPCS for removing Cu(II) through static adsorption. Under optimized conditions including 150 rpm of oscillation rate, 35 °C of adsorption temperature, and 80 min of adsorption time with 50 mg/L of Cu(II) at pH 5.0 in aqueous solution, the removal efficiency reached as high as 98.86 %, and the maximum adsorption capacity was 8.25 mg/g. The adsorption process exhibited conformity with both Langmuir model and pseudo-second-order kinetic model. Thermomechanical analysis indicated that the adsorption was an endothermic spontaneous process. Furthermore, desorption kinetics demonstrated that HCl and EDTA could effectively desorb MPCS-bound Cu with an endothermic process following pseudo-second-order kinetic model. Five consecutive cycles confirmed the excellent regeneration performance of MPCS. Finally, based on experimental data and analysis results presented herein, a potential adsorption mechanism was proposed.
{"title":"Performance and mechanism of adsorption and desorption for copper(II) on corn straw modified with sulfhydryl group","authors":"Xiaoyan Zhu, Gang Wang, Yongpeng Sun, Yaling Guo, Liang Dai","doi":"10.1016/j.ces.2025.121439","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121439","url":null,"abstract":"The pollution of water bodies by Cu(II) is a significant environmental concern. In this paper, we developed a novel straw-based adsorbent, mercaptopropionyl corn straw (MPCS), by the pretreatment with alkali and the modification sulfhydryl group for effectively removing Cu(II) in aqueous solutions. Some characterization results revealed that the abundant functional groups (—OH, —SH, —NH<sub>2</sub>, —COOH) on straw played a crucial role in facilitating Cu(II) adsorption onto MPCS. Adsorption experiments were carried out to assess the performance of MPCS for removing Cu(II) through static adsorption. Under optimized conditions including 150 rpm of oscillation rate, 35 °C of adsorption temperature, and 80 min of adsorption time with 50 mg/L of Cu(II) at pH 5.0 in aqueous solution, the removal efficiency reached as high as 98.86 %, and the maximum adsorption capacity was 8.25 mg/g. The adsorption process exhibited conformity with both Langmuir model and pseudo-second-order kinetic model. Thermomechanical analysis indicated that the adsorption was an endothermic spontaneous process. Furthermore, desorption kinetics demonstrated that HCl and EDTA could effectively desorb MPCS-bound Cu with an endothermic process following pseudo-second-order kinetic model. Five consecutive cycles confirmed the excellent regeneration performance of MPCS. Finally, based on experimental data and analysis results presented herein, a potential adsorption mechanism was proposed.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"39 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.ces.2025.121443
Yuan Feng, Shuai Wang, Liang An
The bubble evolution process on the electrode surface plays a crucial role in determining the efficiency of hydrogen production. In this work, the effective bubble nucleation site probability model is developed based on the cumulative distribution function of surface cavity to obtain the initial nucleation locations of bubbles, where the random number is adopted to get the initial bubble distribution. The volume of fluid (VOF) method is adopted to simulate bubble dynamic behaviors, and the influence of electrode surface wettability is examined. The results demonstrate that the bubble departure on the hydrophilic surface is related to the degree of bubble deformation. For the bubble growth on the hydrophilic surface, the detachment radius is smaller and the degree of deformation is more severe. The effect of surface wettability on the stable bubble number and total bubble interfacial area is not monotonous.
{"title":"Investigation of bubble coalescence and evolution performance on electrode surface","authors":"Yuan Feng, Shuai Wang, Liang An","doi":"10.1016/j.ces.2025.121443","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121443","url":null,"abstract":"The bubble evolution process on the electrode surface plays a crucial role in determining the efficiency of hydrogen production. In this work, the effective bubble nucleation site probability model is developed based on the cumulative distribution function of surface cavity to obtain the initial nucleation locations of bubbles, where the random number is adopted to get the initial bubble distribution. The volume of fluid (VOF) method is adopted to simulate bubble dynamic behaviors, and the influence of electrode surface wettability is examined. The results demonstrate that the bubble departure on the hydrophilic surface is related to the degree of bubble deformation. For the bubble growth on the hydrophilic surface, the detachment radius is smaller and the degree of deformation is more severe. The effect of surface wettability on the stable bubble number and total bubble interfacial area is not monotonous.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"1 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Continuous catalytic reforming (CCR) processes play a critical role in converting petroleum into chemicals, such as benzene, toluene, and xylenes. This study developed a molecular-level model for the CCR process from molecular to industrial scale, involving the detailed kinetic model, reactor model, and flash model. Molecules and reactions were represented using the Structural Unit and Bond Electron Matrix framework. The kinetic model was built based on a computer-generated reaction network and was coupled with the reactor model. The mass, heat, and momentum balance were accounted for in the reactor model to calculate the molecular distribution, temperature, and pressure profiles along the reactor. Moreover, according to the industrial-scale CCR process, the reactor model was linked with flash models. The results demonstrate that the calculated product distribution has a good agreement with the industrial data. On this basis, several sensitivity analyses were performed to validate the model and optimize the product distribution.
{"title":"Molecular-Level modeling of naphtha Continuous catalytic reforming process","authors":"Jian Wu, Guoxing Chen, Aiqing Chen, Zhao Gao, Xi Wu, Haiyang Cheng, Yifei Li, Yongchun Wang, Zhiming Qian, Xiaosong Zhang, Chunming Xu, Zhengyu Chen, Linzhou Zhang","doi":"10.1016/j.ces.2025.121430","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121430","url":null,"abstract":"Continuous catalytic reforming (CCR) processes play a critical role in converting petroleum into chemicals, such as benzene, toluene, and xylenes. This study developed a molecular-level model for the CCR process from molecular to industrial scale, involving the detailed kinetic model, reactor model, and flash model. Molecules and reactions were represented using the Structural Unit and Bond Electron Matrix framework. The kinetic model was built based on a computer-generated reaction network and was coupled with the reactor model. The mass, heat, and momentum balance were accounted for in the reactor model to calculate the molecular distribution, temperature, and pressure profiles along the reactor. Moreover, according to the industrial-scale CCR process, the reactor model was linked with flash models. The results demonstrate that the calculated product distribution has a good agreement with the industrial data. On this basis, several sensitivity analyses were performed to validate the model and optimize the product distribution.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"128 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.ces.2025.121444
Fengying Gao, Xinyu Li, Lihao Liu, Mengmeng Lu, Huaijie Shi, Xuan Yu, Lei Ding, Shibin Wang, Sheng Dai, Xing Zhong, Jianguo Wang
Platinum-based electrocatalysts exhibited good performance in electrocatalytic ozone production (EOP) and hydrogen evolution reaction (HER). Nonetheless, the widespread application of platinum is restricted due to its limited availability and high cost. In this study, we propose an alloying strategy for the synthesis of PtCo/Co2B, which achieved a Faraday efficiency (FE) of 9.09 % for EOP and overpotential of 51.5 mV for HER at 10 mA⋅cm−2 in acidic conditions. Theoretical calculations demonstrate that the synergy between the PtCo and Co2B in PtCo/Co2B modulates the adsorption properties of the O3* intermediate, thereby facilitating the reaction towards the EOP. Furthermore, the chemisorption energy of hydrogen is approximately zero, indicating optimal electrocatalytic activity for HER. Such unique structure enhances the performance of electrocatalyst and significantly extends its durability in practical applications. In addition to its electrochemical performance, the PtCo/Co2B electrocatalyst effectively degrades organic pollutants and demonstrates strong sterilization capabilities.
{"title":"Effective electrochemical ozone production coupled with hydrogen evolution reaction by synergistic effect of PtCo alloy and borides","authors":"Fengying Gao, Xinyu Li, Lihao Liu, Mengmeng Lu, Huaijie Shi, Xuan Yu, Lei Ding, Shibin Wang, Sheng Dai, Xing Zhong, Jianguo Wang","doi":"10.1016/j.ces.2025.121444","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121444","url":null,"abstract":"Platinum-based electrocatalysts exhibited good performance in electrocatalytic ozone production (EOP) and hydrogen evolution reaction (HER). Nonetheless, the widespread application of platinum is restricted due to its limited availability and high cost. In this study, we propose an alloying strategy for the synthesis of PtCo/Co<sub>2</sub>B, which achieved a Faraday efficiency (FE) of 9.09 % for EOP and overpotential of 51.5 mV for HER at 10 mA⋅cm<sup>−2</sup> in acidic conditions. Theoretical calculations demonstrate that the synergy between the PtCo and Co<sub>2</sub>B in PtCo/Co<sub>2</sub>B modulates the adsorption properties of the O<sub>3</sub>* intermediate, thereby facilitating the reaction towards the EOP. Furthermore, the chemisorption energy of hydrogen is approximately zero, indicating optimal electrocatalytic activity for HER. Such unique structure enhances the performance of electrocatalyst and significantly extends its durability in practical applications. In addition to its electrochemical performance, the PtCo/Co<sub>2</sub>B electrocatalyst effectively degrades organic pollutants and demonstrates strong sterilization capabilities.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"26 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hydrochar, a promising class of biomass-derived functional materials, is generally produced via hydrothermal carbonization (HTC). This material has gained significant interest due to its cost-effectiveness and environmental benefits. Utilizing hydrochar as a catalyst not only facilitates the valuable utilization of waste biomass and reduces material costs, but also mitigates environmental pollution and addresses energy crises. This paper provides a comprehensive analysis of recent advancements in hydrochar preparation, its physicochemical features, and its applications in photocatalysis and electrocatalysis. The first section provides a detailed overview of hydrochar synthesis routes from diverse biomass sources. Then the key parameters and processes involved in hydrochar synthesis, and structural characteristic of hydrochar were explored. The second section explores the utilization of hydrochar in photocatalysis and electrocatalysis, focusing on the advantages of hydrochar in organic pollutant degradation, hydrogen production, carbon dioxide reduction, and hydrogen peroxide generation. Additionally, the techniques and strategies to enhance the hydrochar’s catalytic efficiency were discussed. Finally, the future research directions of hydrochar in the field of catalysis was proposed.
{"title":"Recent advances in Biomass-Derived hydrochar for photocatalytic and electrocatalytic applications","authors":"Xianglong Meng, Xingqiang Liu, Debin Zeng, Ying Huang, Hui Wang, Zesheng Li, Changlin Yu","doi":"10.1016/j.ces.2025.121435","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121435","url":null,"abstract":"Hydrochar, a promising class of biomass-derived functional materials, is generally produced <em>via</em> hydrothermal carbonization (HTC). This material has gained significant interest due to its cost-effectiveness and environmental benefits. Utilizing hydrochar as a catalyst not only facilitates the valuable utilization of waste biomass and reduces material costs, but also mitigates environmental pollution and addresses energy crises. This paper provides a comprehensive analysis of recent advancements in hydrochar preparation, its physicochemical features, and its applications in photocatalysis and electrocatalysis. The first section provides a detailed overview of hydrochar synthesis routes from diverse biomass sources. Then the key parameters and processes involved in hydrochar synthesis, and structural characteristic of hydrochar were explored. The second section explores the utilization of hydrochar in photocatalysis and electrocatalysis, focusing on the advantages of hydrochar in organic pollutant degradation, hydrogen production, carbon dioxide reduction, and hydrogen peroxide generation. Additionally, the techniques and strategies to enhance the hydrochar’s catalytic efficiency were discussed. Finally, the future research directions of hydrochar in the field of catalysis was proposed.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"31 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel magnetic biochar (MB) was developed by combining seawater minerals and potassium ferrate during the pyrolysis of corncob at 400–600 °C. The MB pyrolyzed at 600 °C (MB600) was optimal for the removal of tetracycline (TC) and hexavalent chromium (Cr(VI)) from aqueous solutions. The process enhanced the biochar with nano magnetic iron species (Fe3O4, MgFe2O4), increased surface area, and enriched oxygen-containing functional groups for better adsorption. Seawater mineral was instrumental in parceling and dispersing the in-situ generated magnetic iron oxides, facilitating formation of nano-sized iron particles. MB600 exhibited adsorption capacities of 570.16 mg/g for TC and 92.34 mg/g for Cr(VI), with high saturation magnetization (40.40 emu/g). The potential adsorption mechanisms for TC and Cr(VI) were driven by hydrogen bonding/complexation/π-π interaction/pore filling and reduction/hydrogen bonding/complexation/electrostatic interaction/pore filling, respectively. This study presents a sustainable method to produce high-efficiency MB from agricultural waste and seawater minerals for pollution control
{"title":"Preparation of magnetic biochar towards efficient tetracycline and hexavalent chromium removal: Harnessing seawater mineral for encapsulating and impregnating nano-iron oxides","authors":"Kaili He, Zijing Guo, Qin Wen, Jianchao Wang, Chongqing Wang, Yawei Xiao, Hongru Jiang, Jihui Li","doi":"10.1016/j.ces.2025.121421","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121421","url":null,"abstract":"A novel magnetic biochar (MB) was developed by combining seawater minerals and potassium ferrate during the pyrolysis of corncob at 400–600 °C. The MB pyrolyzed at 600 °C (MB600) was optimal for the removal of tetracycline (TC) and hexavalent chromium (Cr(VI)) from aqueous solutions. The process enhanced the biochar with nano magnetic iron species (Fe<sub>3</sub>O<sub>4</sub>, MgFe<sub>2</sub>O<sub>4</sub>), increased surface area, and enriched oxygen-containing functional groups for better adsorption. Seawater mineral was instrumental in parceling and dispersing the in-situ generated magnetic iron oxides, facilitating formation of nano-sized iron particles. MB600 exhibited adsorption capacities of 570.16 mg/g for TC and 92.34 mg/g for Cr(VI), with high saturation magnetization (40.40 emu/g). The potential adsorption mechanisms for TC and Cr(VI) were driven by hydrogen bonding/complexation/π-π interaction/pore filling and reduction/hydrogen bonding/complexation/electrostatic interaction/pore filling, respectively. This study presents a sustainable method to produce high-efficiency MB from agricultural waste and seawater minerals for pollution control","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"49 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1016/j.ces.2025.121409
Chaymae Hmimen, Alae Elabed, Saber Boubakri, Mohamed Amine Djebbi, Abdesslem Ben Haj Amara, Saad Ibn Souda Koraichi, Soumya Elabed
This study introduces a novel approach using MgZnAl-layered triple hydroxide (LTH) and activated carbon (AC) derived from argan nutshells, designed to enhance MO and MB adsorption from aqueous solutions. Synthesized via coprecipitation, carbonization, and H3PO4 activation processes, the LTH_AC composites were thoroughly characterized using XRD, FTIR, Raman, BET, SEM, and TEM. The LTH_AC500 composite showed good adsorption capacities, achieving 154.219 mg/g for MO and 112.989 mg/g for MB. The adsorption kinetics followed a pseudo-second-order model, indicating predominant chemisorption, while the Freundlich isotherm model suggested multilayer adsorption on heterogeneous surfaces. Thermodynamic analysis confirmed the process’s spontaneity, with MO adsorption being endothermic and MB adsorption exothermic. DFT theoretical studies revealed mechanisms such as π-π stacking, coordination interactions, anion exchange, and charge transfer between the dyes and the composite. Additionally, the composite demonstrated stability, recyclability over five cycles, and interference resistance, proving its potential for dye wastewater treatment.
{"title":"Synergistic effects of activated carbon and MgZnAl layered triples hydroxides for removing anionic and cationic dyes: Experimental and theoretical insights","authors":"Chaymae Hmimen, Alae Elabed, Saber Boubakri, Mohamed Amine Djebbi, Abdesslem Ben Haj Amara, Saad Ibn Souda Koraichi, Soumya Elabed","doi":"10.1016/j.ces.2025.121409","DOIUrl":"https://doi.org/10.1016/j.ces.2025.121409","url":null,"abstract":"This study introduces a novel approach using MgZnAl-layered triple hydroxide (LTH) and activated carbon (AC) derived from argan nutshells, designed to enhance MO and MB adsorption from aqueous solutions. Synthesized via coprecipitation, carbonization, and H<sub>3</sub>PO<sub>4</sub> activation processes, the LTH_AC composites were thoroughly characterized using XRD, FTIR, Raman, BET, SEM, and TEM. The LTH_AC500 composite showed good adsorption capacities, achieving 154.219 mg/g for MO and 112.989 mg/g for MB. The adsorption kinetics followed a pseudo-second-order model, indicating predominant chemisorption, while the Freundlich isotherm model suggested multilayer adsorption on heterogeneous surfaces. Thermodynamic analysis confirmed the process’s spontaneity, with MO adsorption being endothermic and MB adsorption exothermic. DFT theoretical studies revealed mechanisms such as π-π stacking, coordination interactions, anion exchange, and charge transfer between the dyes and the composite. Additionally, the composite demonstrated stability, recyclability over five cycles, and interference resistance, proving its potential for dye wastewater treatment.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"27 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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