Pub Date : 2025-12-13DOI: 10.1016/j.seppur.2025.136480
Jihee Song, Chaelin Kim, Chaerin Park, Heeji Yoo, Thillai Govindaraja Senthamaraikannan, Dong-Hee Lim, Chan Woo Park, Hye-Jin Hong
{"title":"Metal-dependent formation of metal hexacyanoferrate (Me-HCF) particles on alginate bead for selective Cesium capture: Role of metal–alginate binding","authors":"Jihee Song, Chaelin Kim, Chaerin Park, Heeji Yoo, Thillai Govindaraja Senthamaraikannan, Dong-Hee Lim, Chan Woo Park, Hye-Jin Hong","doi":"10.1016/j.seppur.2025.136480","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.136480","url":null,"abstract":"","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"42 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-12-13DOI: 10.1016/j.seppur.2025.136492
Wenqian Li, Jianbei Zhang, Yang Li, Jiaxiu Guo
{"title":"Synergistic interfacial engineering of S-scheme BiOCl/MnO2 with oxygen vacancies for highly selective photocatalytic NO removal","authors":"Wenqian Li, Jianbei Zhang, Yang Li, Jiaxiu Guo","doi":"10.1016/j.seppur.2025.136492","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.136492","url":null,"abstract":"","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"150 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-12-12DOI: 10.1016/j.seppur.2025.136471
Ying Zhang, Xuehui Lan, Huan Tang, Peng Gao, Huiying Li, Cui Liu, Jigang Wang
Artemisinin has garnered significant research interest due to its potent antimalarial properties. The selective isolation of artemisinin from Artemisia annua L. remains technically challenging due to its low natural abundance and the cumbersome separation from co-extracted waxy oil. In this study, a series of novel poly(ionic liquid) (PIL) adsorptive membranes featuring varying alkyl chain lengths were synthesized by polymerization at room temperature. The PIL membranes were applied to separate artemisinin from waxy oil and the results demonstrated that the membranes exhibited outstanding purification performance. The PIL − 12 achieved rapid adsorption of waxy oil with a capacity of 358.49 mg/g within 40 min and the purity of artemisinin exceeded 99 % after a single crystallization step under optimal conditions. Moreover, the PIL-12 still possessed excellent separation for artemisinin after six cycles. The purification mechanism was investigated through both experimental and theoretical simulation approaches, revealing that the PIL membrane simultaneously adsorbed multiple waxy oil components via electrostatic forces and hydrogen bonding interactions. Moreover, the PIL adsorptive membranes displayed strong antibacterial activity against E. coli and S. aureus. This study provides critical design strategies and novel insights for the separation of bioactive compounds from traditional Chinese medicines.
{"title":"Fabrication of dual-functional poly(ionic liquid) adsorptive membranes for enhanced artemisinin separation and antibacterial activities","authors":"Ying Zhang, Xuehui Lan, Huan Tang, Peng Gao, Huiying Li, Cui Liu, Jigang Wang","doi":"10.1016/j.seppur.2025.136471","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.136471","url":null,"abstract":"Artemisinin has garnered significant research interest due to its potent antimalarial properties. The selective isolation of artemisinin from <em>Artemisia annua</em> L. remains technically challenging due to its low natural abundance and the cumbersome separation from co-extracted waxy oil. In this study, a series of novel poly(ionic liquid) (PIL) adsorptive membranes featuring varying alkyl chain lengths were synthesized by polymerization at room temperature. The PIL membranes were applied to separate artemisinin from waxy oil and the results demonstrated that the membranes exhibited outstanding purification performance. The PIL − 12 achieved rapid adsorption of waxy oil with a capacity of 358.49 mg/g within 40 min and the purity of artemisinin exceeded 99 % after a single crystallization step under optimal conditions. Moreover, the PIL-12 still possessed excellent separation for artemisinin after six cycles. The purification mechanism was investigated through both experimental and theoretical simulation approaches, revealing that the PIL membrane simultaneously adsorbed multiple waxy oil components via electrostatic forces and hydrogen bonding interactions. Moreover, the PIL adsorptive membranes displayed strong antibacterial activity against <em>E. coli</em> and <em>S. aureus</em>. This study provides critical design strategies and novel insights for the separation of bioactive compounds from traditional Chinese medicines.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"37 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145728799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Layered double hydroxides (LDHs) are widely used to develop and design efficient CO2 capture materials because of their unique structure and performance. However, the aggregation of LDH nanosheets often masks their active sites and blocks diffusion channels, thereby limiting their CO₂ capacity. This work reports an interfacial engineering strategy to construct an efficient adsorbent by in situ growing nanoflower-like LDH (NFL) on an alkali-functionalized MXene substrate. Alkaline treatment of MXene introduces abundant surface functional groups, which synergize with an optimized Mg2+/Al3+ ratio (3:1) to guide the heterogeneous crystallization of vertically aligned NFL, thereby preventing nanosheet stacking and fully exposing the hydroxyl sites. Mechanistic studies reveal that the metal ratio governs the nucleation kinetics and interfacial charge distribution, corroborated by DFT calculations. Consequently, the resulting MXene/LDH heterostructure exhibits an enhanced CO₂ capacity, attributable to exposed active sites and improved mass transfer pathways achieved through interfacial regulation. This work provides an insight into the interface-dependent growth mechanism and advances the design of LDH-based hybrid materials for gas capture.
{"title":"Interfacial engineering of MXene-induced nanoflower-like LDH heterostructures for enhanced CO₂ capture","authors":"Xiaoqian Ju, Xiangbo Feng, Xinbo Duan, Baolu Cui, Genghuai Huang, Yue Chen, Xin Tong, Zhiyuan Yang, Pu Guo, Shudong Xu, Jian-Wen Shi","doi":"10.1016/j.seppur.2025.136443","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.136443","url":null,"abstract":"Layered double hydroxides (LDHs) are widely used to develop and design efficient CO<sub>2</sub> capture materials because of their unique structure and performance. However, the aggregation of LDH nanosheets often masks their active sites and blocks diffusion channels, thereby limiting their CO₂ capacity. This work reports an interfacial engineering strategy to construct an efficient adsorbent by in situ growing nanoflower-like LDH (NFL) on an alkali-functionalized MXene substrate. Alkaline treatment of MXene introduces abundant surface functional groups, which synergize with an optimized Mg<sup>2+</sup>/Al<sup>3+</sup> ratio (3:1) to guide the heterogeneous crystallization of vertically aligned NFL, thereby preventing nanosheet stacking and fully exposing the hydroxyl sites. Mechanistic studies reveal that the metal ratio governs the nucleation kinetics and interfacial charge distribution, corroborated by DFT calculations. Consequently, the resulting MXene/LDH heterostructure exhibits an enhanced CO₂ capacity, attributable to exposed active sites and improved mass transfer pathways achieved through interfacial regulation. This work provides an insight into the interface-dependent growth mechanism and advances the design of LDH-based hybrid materials for gas capture.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"7 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145728800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-12-12DOI: 10.1016/j.seppur.2025.136476
Wenxiang Xia, Miao Chen, Yuyuan Huang, Xin Ji, Xinyu He, Caifeng Gao, Hongqing Xu, Wenxian Wang, Wenming Song, Bingrui Ma
The heterogeneous photocatalysis is a green and sustainable technology for environmental remediation, but the rapid carrier recombination and limited oxidative capacity restricted its practical application. Herein, a novel S-scheme heterojunction by combining Bi2WO6 and TiO2 nanotube arrays (BWO/TNAs) was constructed to boost photocatalytic degradation of levofloxacin (LEV) with peroxymonosulfate (PMS) assistance. The LEV degradation efficiency in the Vis/PMS/BWO/TNAs system (93.6%) was substantially higher than that of individual photocatalysis (48.7%) or PMS activation (27.2%) process, demonstrating a strong synergistic effect (synergy index = 3.2). A comprehensive kinetic model was established to describe the degradation rate as a function of PMS dosage, LEV concentration and solution pH. The characterization analysis, photoelectrochemical property and density functional theory (DFT) calculations demonstrated that the S-scheme heterojunction effectively suppressed the recombination of photogenerated electrons and holes, while maintained high redox potential. Meanwhile, the addition of PMS contributed to the consumption of photogenerated electrons to generate more active species, which further reduced the recombination of photogenerated carriers. Notably, toxicity assessment using software prediction, Escherichia coli and Soybeans seeds indicated a significant reduction in the acute and developmental toxicity of the degradation intermediates. Furthermore, the Vis/PMS/BWO/TNAs system exhibited excellent reusability, broad-spectrum antibiotic degradation capability, and robust performance in various real water matrices, highlighting its great potential for practical environmental applications.
{"title":"Peroxymonosulfate-assisted photocatalytic degradation of levofloxacin by hollow Bi2WO6/TiO2 nanotube arrays S-scheme heterojunction: Kinetics, mechanism and toxicity assessment","authors":"Wenxiang Xia, Miao Chen, Yuyuan Huang, Xin Ji, Xinyu He, Caifeng Gao, Hongqing Xu, Wenxian Wang, Wenming Song, Bingrui Ma","doi":"10.1016/j.seppur.2025.136476","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.136476","url":null,"abstract":"The heterogeneous photocatalysis is a green and sustainable technology for environmental remediation, but the rapid carrier recombination and limited oxidative capacity restricted its practical application. Herein, a novel S-scheme heterojunction by combining Bi<sub>2</sub>WO<sub>6</sub> and TiO<sub>2</sub> nanotube arrays (BWO/TNAs) was constructed to boost photocatalytic degradation of levofloxacin (LEV) with peroxymonosulfate (PMS) assistance. The LEV degradation efficiency in the Vis/PMS/BWO/TNAs system (93.6%) was substantially higher than that of individual photocatalysis (48.7%) or PMS activation (27.2%) process, demonstrating a strong synergistic effect (synergy index = 3.2). A comprehensive kinetic model was established to describe the degradation rate as a function of PMS dosage, LEV concentration and solution pH. The characterization analysis, photoelectrochemical property and density functional theory (DFT) calculations demonstrated that the S-scheme heterojunction effectively suppressed the recombination of photogenerated electrons and holes, while maintained high redox potential. Meanwhile, the addition of PMS contributed to the consumption of photogenerated electrons to generate more active species, which further reduced the recombination of photogenerated carriers. Notably, toxicity assessment using software prediction, <em>Escherichia coli</em> and <em>Soybeans</em> seeds indicated a significant reduction in the acute and developmental toxicity of the degradation intermediates. Furthermore, the Vis/PMS/BWO/TNAs system exhibited excellent reusability, broad-spectrum antibiotic degradation capability, and robust performance in various real water matrices, highlighting its great potential for practical environmental applications.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"22 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145728798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CO selective catalytic reduction of nitrogen oxides (CO-SCR) is considered an attractive approach for emission control, though its effectiveness is substantially compromised by the preferential oxidation of CO in oxygen-containing atmospheres. In this work, a Sn modification strategy was developed to promote the CO-SCR performance of Ir-based catalysts under complex flue gas conditions. Sn modification of Ir-based catalysts was found to facilitate electron transfer, increase the proportion of metallic Ir0 active sites, and enhance oxidation resistance. Simultaneously, Sn doping suppressed O2 adsorption and CO over-oxidation while strengthening NO adsorption capacity. These structural advantages enabled the IrSn/ZSM-5 catalyst to exhibit superior CO-SCR performance with optimal activity, strong adaptability to simulated flue gas, excellent SO2 resistance, and remarkable long-term stability. In situ FTIR spectroscopy identified N2O and ONNO as key intermediates, supporting a Langmuir–Hinshelwood mechanism. This study demonstrates the universal effectiveness of Sn modification for designing efficient and stable Ir-based denitration catalysts under practical flue gas conditions.
{"title":"Unveiling the significant promoting effect of the Ir–Sn interaction on the CO-SCR performance of Ir-based catalysts in the presence of O2","authors":"Chuhan Miao, Yarong Bai, Haiqiang Wang, Zhongbiao Wu","doi":"10.1016/j.seppur.2025.136475","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.136475","url":null,"abstract":"CO selective catalytic reduction of nitrogen oxides (CO-SCR) is considered an attractive approach for emission control, though its effectiveness is substantially compromised by the preferential oxidation of CO in oxygen-containing atmospheres. In this work, a Sn modification strategy was developed to promote the CO-SCR performance of Ir-based catalysts under complex flue gas conditions. Sn modification of Ir-based catalysts was found to facilitate electron transfer, increase the proportion of metallic Ir<sup>0</sup> active sites, and enhance oxidation resistance. Simultaneously, Sn doping suppressed O<sub>2</sub> adsorption and CO over-oxidation while strengthening NO adsorption capacity. These structural advantages enabled the IrSn/ZSM-5 catalyst to exhibit superior CO-SCR performance with optimal activity, strong adaptability to simulated flue gas, excellent SO<sub>2</sub> resistance, and remarkable long-term stability. In situ FTIR spectroscopy identified N<sub>2</sub>O and ONNO as key intermediates, supporting a Langmuir–Hinshelwood mechanism. This study demonstrates the universal effectiveness of Sn modification for designing efficient and stable Ir-based denitration catalysts under practical flue gas conditions.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"26 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145728803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-12-11DOI: 10.1016/j.seppur.2025.136465
Shixiang Li , Shang Gao , Jingshuai Bi , Xuesong Yang , Yunrui Chen , Zhe Li , Yaowen Xing , Xiahui Gui
Ultrafine coal flotation remains challenging because weak particle inertia and strong entrainment reduce bubble–particle collision and attachment efficiencies. Conventional mechanical cells provide strong turbulence but insufficient selectivity, while flotation columns enhance microbubble attachment yet fail to recover coarse particles effectively. Overcoming these limitations requires equipment capable of integrating intensive collision with selective separation. A two-stage turbulent microbubble flotation cell (TMFC) was developed, combining an impeller-driven collision zone with a low-turbulence froth-cleaning zone. Hydrodynamic characteristics were investigated through computational fluid dynamics, focusing on turbulence dissipation, vorticity, gas holdup, and bubble size distribution. Semi-industrial continuous flotation tests were performed under varying feed rate, impeller speed, and air rate. Results demonstrated that the TMFC achieved higher combustible recovery and lower product ash compared with a forced-circulation mechanical cell (FCMC) at the same unit throughput. Continuous operation confirmed stable separation performance and reproducibility. This study establishes the TMFC as a novel flotation device that effectively addresses the recovery of ultrafine coal, providing both mechanistic insights and practical guidance for advanced flotation equipment design.
{"title":"Development and semi-industrial evaluation of a two-stage turbulent microbubble flotation cell for ultrafine coal separation","authors":"Shixiang Li , Shang Gao , Jingshuai Bi , Xuesong Yang , Yunrui Chen , Zhe Li , Yaowen Xing , Xiahui Gui","doi":"10.1016/j.seppur.2025.136465","DOIUrl":"10.1016/j.seppur.2025.136465","url":null,"abstract":"<div><div>Ultrafine coal flotation remains challenging because weak particle inertia and strong entrainment reduce bubble–particle collision and attachment efficiencies. Conventional mechanical cells provide strong turbulence but insufficient selectivity, while flotation columns enhance microbubble attachment yet fail to recover coarse particles effectively. Overcoming these limitations requires equipment capable of integrating intensive collision with selective separation. A two-stage turbulent microbubble flotation cell (TMFC) was developed, combining an impeller-driven collision zone with a low-turbulence froth-cleaning zone. Hydrodynamic characteristics were investigated through computational fluid dynamics, focusing on turbulence dissipation, vorticity, gas holdup, and bubble size distribution. Semi-industrial continuous flotation tests were performed under varying feed rate, impeller speed, and air rate. Results demonstrated that the TMFC achieved higher combustible recovery and lower product ash compared with a forced-circulation mechanical cell (FCMC) at the same unit throughput. Continuous operation confirmed stable separation performance and reproducibility. This study establishes the TMFC as a novel flotation device that effectively addresses the recovery of ultrafine coal, providing both mechanistic insights and practical guidance for advanced flotation equipment design.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"385 ","pages":"Article 136465"},"PeriodicalIF":9.0,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145718352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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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