Pub Date : 2026-02-07DOI: 10.1016/j.seppur.2026.137181
Xinlu Li, Yong Cao, Jie Tang, Yihan Zhao, Subhan Mahmood, Shun Yao
Snake shedding skin (snake molt) exhibits good potential for nutritional and functional applications, yet current methods for sustainable and efficient extraction of protein peptides from such an animal raw material are relatively limited. Herein, we reported novel foaming deep eutectic solvents (FDES) loaded effervescent discs for enriching target protein peptides in hydrolyzed extract of snake molt. Two kinds of natural sweeteners were used in the FDESs, which played an important role on foam stabilization and endowed FDESs with higher biocompatibility. After comprehensive characterizations, the discs exhibited good properties and expected forming performance. Under the ideal conditions, the effervescent discs enriched 91.40% protein peptides within 4 min, which was much higher than the alcohol precipitation method (40.12% within 3 d) and the aqueous two-phase system (80.67% within 1 h). Green assessment and scale-up experiments were also carried out for possible actual applications. Finally, the enriched product was analyzed by comprehensive physicochemical characterizations confirmed structural integrity and performance. The developed method offers a rapid, sustainable approach for obtaining peptides from natural products.
{"title":"Enriching trace protein peptides from extract liquid with foaming deep eutectic solvent (FDES)-loaded effervescent discs","authors":"Xinlu Li, Yong Cao, Jie Tang, Yihan Zhao, Subhan Mahmood, Shun Yao","doi":"10.1016/j.seppur.2026.137181","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137181","url":null,"abstract":"Snake shedding skin (snake molt) exhibits good potential for nutritional and functional applications, yet current methods for sustainable and efficient extraction of protein peptides from such an animal raw material are relatively limited. Herein, we reported novel foaming deep eutectic solvents (FDES) loaded effervescent discs for enriching target protein peptides in hydrolyzed extract of snake molt. Two kinds of natural sweeteners were used in the FDESs, which played an important role on foam stabilization and endowed FDESs with higher biocompatibility. After comprehensive characterizations, the discs exhibited good properties and expected forming performance. Under the ideal conditions, the effervescent discs enriched 91.40% protein peptides within 4 min, which was much higher than the alcohol precipitation method (40.12% within 3 d) and the aqueous two-phase system (80.67% within 1 h). Green assessment and scale-up experiments were also carried out for possible actual applications. Finally, the enriched product was analyzed by comprehensive physicochemical characterizations confirmed structural integrity and performance. The developed method offers a rapid, sustainable approach for obtaining peptides from natural products.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"312 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135565","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 : 2026-02-07DOI: 10.1016/j.seppur.2026.137186
Liang Jiang, Qiuyi Wang, Shuang Li, Dong Wang, Yaoyao Tang, Jiahao Luo, Jun Liao, Congcong Ding, Lielin Wang, Mei Tang, Xiaoan Li, Mingsong Shi
Polonium was a highly toxic and radioactive nuclide commonly detected in wastewater from spent fuel reprocessing and lead‑bismuth-cooled reactor systems, making its removal essential for nuclear safety. In this work, lanthanum-modified magnesium‑aluminum layered double oxide (La-MgAl-LDO) was prepared by doping La(III) in Mg-Al layered double oxide (Mg-Al-LDO). Additionally, tellurium, which has similar chemical properties, was used as a substitute for polonium to investigate the adsorption performance. Under the optimized conditions (pH = 6, m/V = 0.2 g/L, and C0 = 20 mg/L), La-MgAl-LDO achieved a maximum removal efficiency of 99% for tellurite. The adsorption of Te(IV) onto La-MgAl-LDO followed the pseudo-second-order and Freundlich models, indicating that the adsorption process was characterized by multilayer chemical adsorption. The Te(IV) adsorption mechanisms mainly include co-precipitation and surface complexation. In addition, the study confirmed that La3+ reacted with Te(IV) to form a stable solid precipitate (La2Te6O15), which played a crucial role in the removal of Te(IV) from aqueous solution.
{"title":"Synthesis of La-doped Mg-Al layered double oxide for selective tellurite adsorption","authors":"Liang Jiang, Qiuyi Wang, Shuang Li, Dong Wang, Yaoyao Tang, Jiahao Luo, Jun Liao, Congcong Ding, Lielin Wang, Mei Tang, Xiaoan Li, Mingsong Shi","doi":"10.1016/j.seppur.2026.137186","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137186","url":null,"abstract":"Polonium was a highly toxic and radioactive nuclide commonly detected in wastewater from spent fuel reprocessing and lead‑bismuth-cooled reactor systems, making its removal essential for nuclear safety. In this work, lanthanum-modified magnesium‑aluminum layered double oxide (La-MgAl-LDO) was prepared by doping La(III) in Mg-Al layered double oxide (Mg-Al-LDO). Additionally, tellurium, which has similar chemical properties, was used as a substitute for polonium to investigate the adsorption performance. Under the optimized conditions (pH = 6, m/V = 0.2 g/L, and C<sub>0</sub> = 20 mg/L), La-MgAl-LDO achieved a maximum removal efficiency of 99% for tellurite. The adsorption of Te(IV) onto La-MgAl-LDO followed the pseudo-second-order and Freundlich models, indicating that the adsorption process was characterized by multilayer chemical adsorption. The Te(IV) adsorption mechanisms mainly include co-precipitation and surface complexation. In addition, the study confirmed that La<sup>3+</sup> reacted with Te(IV) to form a stable solid precipitate (La<sub>2</sub>Te<sub>6</sub>O<sub>15</sub>), which played a crucial role in the removal of Te(IV) from aqueous solution.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"31 1","pages":"137186"},"PeriodicalIF":8.6,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146174","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}
Efficient photocatalytic air and water remediation was limited by the trade-off between redox potential and spectral response. Herein, an Au/faceted Bi2O2CO3@Mn3O4 core@shell heterostructure was engineered for enhanced NO oxidation and clothianidin (CLO) degradation. Specifically, the interleaved slit architecture of Bi2O2CO3 with exposed {001} facets enhanced light scattering and surface energy, promoting visible light absorption and oxidation reactions. Notably, plasmonic Au nanoparticles synergized with Mn3O4 to induce dipole resonance due to symmetry of the electric field vector, amplifying the local electric field and broadening the spectral response. Meanwhile, Au mediated charge redistribution between Mn3O4 and faceted Bi2O2CO3, generating a giant internal electric field (IEF) that accelerated charge separation. Consequently, the heterostructure achieved 73.2% NO removal with 93.5% NO3− selectivity and minimal NO2 formation (28.6 ppb), as well as 95.6% CLO degradation under visible light, ultimately converting into non-toxic products, which exceeded reported benchmarks. The enhanced activity originated from Mn3O4/Au-induced dipole resonance–assisted Z-scheme charge transfer combined with IEF-driven carrier separation and prolonged lifetimes. The catalyst also exhibited excellent cycling stability, highlighting its promise for air and water purification.
{"title":"Faceted Bi2O2CO3 with Au@Mn3O4-induced dipole resonance for efficient photocatalytic NO/clothianidin oxidation","authors":"Xiaoming Xu, Jiaying Huang, Xianhui Zhu, Bing Liu, Ziyi Huang, Yijin Jia, Yike Zhang, Cheng Sun","doi":"10.1016/j.seppur.2026.137173","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137173","url":null,"abstract":"Efficient photocatalytic air and water remediation was limited by the trade-off between redox potential and spectral response. Herein, an Au/faceted Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>@Mn<sub>3</sub>O<sub>4</sub> core@shell heterostructure was engineered for enhanced NO oxidation and clothianidin (CLO) degradation. Specifically, the interleaved slit architecture of Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> with exposed {001} facets enhanced light scattering and surface energy, promoting visible light absorption and oxidation reactions. Notably, plasmonic Au nanoparticles synergized with Mn<sub>3</sub>O<sub>4</sub> to induce dipole resonance due to symmetry of the electric field vector, amplifying the local electric field and broadening the spectral response. Meanwhile, Au mediated charge redistribution between Mn<sub>3</sub>O<sub>4</sub> and faceted Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>, generating a giant internal electric field (IEF) that accelerated charge separation. Consequently, the heterostructure achieved 73.2% NO removal with 93.5% NO<sub>3</sub><sup>−</sup> selectivity and minimal NO<sub>2</sub> formation (28.6 ppb), as well as 95.6% CLO degradation under visible light, ultimately converting into non-toxic products, which exceeded reported benchmarks. The enhanced activity originated from Mn<sub>3</sub>O<sub>4</sub>/Au-induced dipole resonance–assisted <em>Z</em>-scheme charge transfer combined with IEF-driven carrier separation and prolonged lifetimes. The catalyst also exhibited excellent cycling stability, highlighting its promise for air and water purification.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"44 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135585","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}
The development of NH3-SCR catalysts that simultaneously achieve high activity at ultra-low temperatures (<150 °C) and possess robust resistance to H2O and SO2 poisoning remains a significant challenge. In this work, a novel sandwich-structured monolithic catalyst, denoted as ERI@Co1.0Fe0.6-MnOx@Cor (where ERI stands for erionite), was successfully fabricated. This was achieved by sequentially constructing a CoFe-MnOx intermediate catalytic layer via an impregnation-coprecipitation method and an outer zeolite ERI shell through a dip-coating process on the cordierite support. The optimized catalyst exhibits exceptional NOx conversion (>95%) within a broad temperature window of 150–350 °C, achieving complete conversion (100%) at 150 °C. More importantly, the sandwich structure endows the catalyst with superior resistance to H2O and SO2, maintaining over 90% NOx conversion at 150–250 °C even in the presence of 5 vol% H2O and/or 100 ppm SO2. This performance is significantly superior to that of all previously reported counterparts. Characterization results revealed that the Co–Fe–Mn ternary synergy enhances redox properties via increased Mn4+ and chemisorbed oxygen concentrations, while the ERI zeolite shell as a protective barrier was identified as the key factor responsible for the enhanced medium-strength acid sites and exceptional poisoning resistance. Combined with its regenerable stability, this work provides a novel strategy for designing high-performance monolithic SCR catalysts for practical low-temperature applications.
{"title":"Enabling ultra-low-temperature NH3-SCR with superior H2O/SO2 resistance by a sandwich-structured ERI@CoFe-MnOx@Cor monolithic catalyst","authors":"Yuhan Li, Juntao Wang, Liwei Xu, Haixin Shan, Yemei Liu, Na Hu, Xiangshu Chen","doi":"10.1016/j.seppur.2026.137174","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137174","url":null,"abstract":"The development of NH<sub>3</sub>-SCR catalysts that simultaneously achieve high activity at ultra-low temperatures (<150 °C) and possess robust resistance to H<sub>2</sub>O and SO<sub>2</sub> poisoning remains a significant challenge. In this work, a novel sandwich-structured monolithic catalyst, denoted as ERI@Co<sub>1.0</sub>Fe<sub>0.6</sub>-MnO<sub>x</sub>@Cor (where ERI stands for erionite), was successfully fabricated. This was achieved by sequentially constructing a CoFe-MnO<sub>x</sub> intermediate catalytic layer via an impregnation-coprecipitation method and an outer zeolite ERI shell through a dip-coating process on the cordierite support. The optimized catalyst exhibits exceptional NO<sub>x</sub> conversion (>95%) within a broad temperature window of 150–350 °C, achieving complete conversion (100%) at 150 °C. More importantly, the sandwich structure endows the catalyst with superior resistance to H<sub>2</sub>O and SO<sub>2</sub>, maintaining over 90% NO<sub>x</sub> conversion at 150–250 °C even in the presence of 5 vol% H<sub>2</sub>O and/or 100 ppm SO<sub>2</sub>. This performance is significantly superior to that of all previously reported counterparts. Characterization results revealed that the Co–Fe–Mn ternary synergy enhances redox properties via increased Mn<sup>4+</sup> and chemisorbed oxygen concentrations, while the ERI zeolite shell as a protective barrier was identified as the key factor responsible for the enhanced medium-strength acid sites and exceptional poisoning resistance. Combined with its regenerable stability, this work provides a novel strategy for designing high-performance monolithic SCR catalysts for practical low-temperature applications.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"48 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135586","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 : 2026-02-06DOI: 10.1016/j.seppur.2026.137175
Han Yan, Zejin Zhao, Rui Han, Lifei Wei, Gaoqi Han, Yuhan Ba, Chunfeng Song, Qingling Liu
Carbon-based catalysts have received much attention in the field of catalysis due to their excellent electrical conductivity, high specific surface area, good chemical stability, and thermal conductivity, particularly for CO2 conversion. Carbon materials as catalyst supports enhance CO2 hydrogenation by leveraging their excellent electrical/thermal conductivity to facilitate electron transfer and heat dispersion. At the same time, their high specific surface area and porous structure provide abundant active sites. They also maintain stable mechanical properties under harsh conditions, synergistically boosting conversion efficiency and product selectivity. This review examines the use of carbon materials as catalytic supports for the thermal hydrogenation of CO2 to C1 products. Initially, we elucidate the mechanism by which carbon-based support promotes the CO2 hydrogenation reaction. Subsequently, the synthesis method of various carbon-based catalyst composites designed for the thermal hydrogenation of CO2 was summarised. Furthermore, we provide a comprehensive comparison of the catalytic activity and selectivity of carbon-supported catalysts, offering insights into how different dimensions of carbon-based carriers influence the catalytic performance toward the production of methane, methanol, formic acid, and carbon monoxide. Lastly, the paper highlights the current challenges and prospective research directions for the research of carbon-based catalysts in CO2 conversion reactions, paving the way for innovative strategies to address global carbon neutrality and sustainable energy conversion through advanced CO2 utilisation technologies.
{"title":"Carbon-based catalysts for CO2 hydrogenation to C1 products: mechanisms, materials, and prospects","authors":"Han Yan, Zejin Zhao, Rui Han, Lifei Wei, Gaoqi Han, Yuhan Ba, Chunfeng Song, Qingling Liu","doi":"10.1016/j.seppur.2026.137175","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137175","url":null,"abstract":"Carbon-based catalysts have received much attention in the field of catalysis due to their excellent electrical conductivity, high specific surface area, good chemical stability, and thermal conductivity, particularly for CO<sub>2</sub> conversion. Carbon materials as catalyst supports enhance CO<sub>2</sub> hydrogenation by leveraging their excellent electrical/thermal conductivity to facilitate electron transfer and heat dispersion. At the same time, their high specific surface area and porous structure provide abundant active sites. They also maintain stable mechanical properties under harsh conditions, synergistically boosting conversion efficiency and product selectivity. This review examines the use of carbon materials as catalytic supports for the thermal hydrogenation of CO<sub>2</sub> to C1 products. Initially, we elucidate the mechanism by which carbon-based support promotes the CO<sub>2</sub> hydrogenation reaction. Subsequently, the synthesis method of various carbon-based catalyst composites designed for the thermal hydrogenation of CO<sub>2</sub> was summarised. Furthermore, we provide a comprehensive comparison of the catalytic activity and selectivity of carbon-supported catalysts, offering insights into how different dimensions of carbon-based carriers influence the catalytic performance toward the production of methane, methanol, formic acid, and carbon monoxide. Lastly, the paper highlights the current challenges and prospective research directions for the research of carbon-based catalysts in CO<sub>2</sub> conversion reactions, paving the way for innovative strategies to address global carbon neutrality and sustainable energy conversion through advanced CO<sub>2</sub> utilisation technologies.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"39 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135522","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}
The ubiquitous contamination of aquatic systems by antibiotics necessitates effective remediation strategies. Advanced oxidation processes (AOPs) utilizing periodate (PI) show great potential, yet the development of efficient and economical activators remains imperative to harness this technology. In this study, we employed pyrite (FeS2), an abundant and low-cost natural mineral, as an activator for PI to establish a highly efficient heterogenous AOPs system. The FeS2/PI system achieved rapid degradation of tetracycline (TC), with an observed rate constant kobs of 0.465 min−1. Remarkably, the system maintained high performance across diverse water matrixes, including high ionic strength, various coexisting anions, a broad pH range, the presence of humic acid, and in natural water. Moreover, the FeS2/PI system demonstrated versatility in degrading other organic contaminants, exhibiting selectivity towards electron-rich organic compounds. •OH, IO3•, 1O2 and Fe(IV) were identified as the primary reactive species responsible for TC degradation, with electron transfer processes also contributing to the oxidation. Additionally, a catalytic mechanism centered on Fe(II)/Fe(III) redox cycle was proposed and Fe site on the (100) plane of FeS2 was identified as the dominant reactive center for PI adsorption and subsequent activation. Possible degradation pathways of TC were proposed, and ecotoxicity assessments indicated a notable toxicity attenuation among the intermediates. This work not only underscores the potential of FeS2 as a cost-effective catalyst for antibiotics remediation but also provides a comprehensive and practical foundation for the application of FeS2/PI system in real-world water treatment.
{"title":"Highly efficient degradation of tetracycline in water using low-cost pyrite activated periodate: Performance and mechanisms insight","authors":"Shensi Ma, Chengyi Zhang, Qinghao Wu, Fanxu Meng, Yuanfeng Liu, Huan Liu, Ruixue Zhao, Xiaoqi Sun, Zihan Zhong, Wuerkaixi Maimuli, Lingxi Xia, Huifang Sun, Kuichang Zuo","doi":"10.1016/j.seppur.2026.137172","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137172","url":null,"abstract":"The ubiquitous contamination of aquatic systems by antibiotics necessitates effective remediation strategies. Advanced oxidation processes (AOPs) utilizing periodate (PI) show great potential, yet the development of efficient and economical activators remains imperative to harness this technology. In this study, we employed pyrite (FeS<sub>2</sub>), an abundant and low-cost natural mineral, as an activator for PI to establish a highly efficient heterogenous AOPs system. The FeS<sub>2</sub>/PI system achieved rapid degradation of tetracycline (TC), with an observed rate constant <em>k</em><sub><em>obs</em></sub> of 0.465 min<sup>−1</sup>. Remarkably, the system maintained high performance across diverse water matrixes, including high ionic strength, various coexisting anions, a broad pH range, the presence of humic acid, and in natural water. Moreover, the FeS<sub>2</sub>/PI system demonstrated versatility in degrading other organic contaminants, exhibiting selectivity towards electron-rich organic compounds. •OH, IO<sub>3</sub>•, <sup>1</sup>O<sub>2</sub> and Fe(IV) were identified as the primary reactive species responsible for TC degradation, with electron transfer processes also contributing to the oxidation. Additionally, a catalytic mechanism centered on Fe(II)/Fe(III) redox cycle was proposed and Fe site on the (100) plane of FeS<sub>2</sub> was identified as the dominant reactive center for PI adsorption and subsequent activation. Possible degradation pathways of TC were proposed, and ecotoxicity assessments indicated a notable toxicity attenuation among the intermediates. This work not only underscores the potential of FeS<sub>2</sub> as a cost-effective catalyst for antibiotics remediation but also provides a comprehensive and practical foundation for the application of FeS<sub>2</sub>/PI system in real-world water treatment.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"93 1","pages":"137172"},"PeriodicalIF":8.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146016","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 : 2026-02-05DOI: 10.1016/j.seppur.2026.137100
Xinlin Wang, Chunquan Li, Jinpan Li, Wanshu Chen, Wanjie Wang, Meng Yuan, Kai Wang, Fang Yuan, Hongqi Sun, Zhiming Sun
The coexistence of heavy metals and organic contaminants in wastewater poses severe risks to public health and environmental sustainability. Iron sulfide (FeS) has attracted widespread attention for its potential in addressing such complex pollution, but suffers from the tendency to agglomerate and instability, which may lead to unsatisfactory remediation efficiencies. Herein, a novel Fe1-xS/kaolinite composite (Fe1-xS@K), derived from the transformation of FeS/kaolinite (FeS@K) material in an acidic condition, demonstrates efficient simultaneous removal of Cd(II) and benzo(a)pyrene (B[a]P) by ensuring excellent dispersion and stability. Notably, the 0.6-Fe1-xS@K/peroxymonosulfate (PMS) system removed 96.9% of Cd2+ and 98.9% of B[a]P within 20 min, respectively. Mechanism analysis revealed that kaolinite modulates the particle size of Fe1-xS to effectively minimize the agglomeration, thereby facilitating the activation of PMS and enhancing both thermal and chemical stability. This significantly boosts the generation of reactive oxygen species (ROS), e.g., SO4⋅−, ⋅OH, 1O2, and ⋅O2− in the degradation system, thus exhibits an exceptional potential for natural water and wastewater treatment due to its broad resistance to environmental interference. This work exemplifies a highly efficient sulfate radical-based advanced oxidation process for the removal of complex contaminants in water treatment.
{"title":"Simultaneous removal of Cd (II) and benzo(a)pyrene complex pollution in a Fe1-xS@kaolinite/peroxymonosulfate system","authors":"Xinlin Wang, Chunquan Li, Jinpan Li, Wanshu Chen, Wanjie Wang, Meng Yuan, Kai Wang, Fang Yuan, Hongqi Sun, Zhiming Sun","doi":"10.1016/j.seppur.2026.137100","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137100","url":null,"abstract":"The coexistence of heavy metals and organic contaminants in wastewater poses severe risks to public health and environmental sustainability. Iron sulfide (FeS) has attracted widespread attention for its potential in addressing such complex pollution, but suffers from the tendency to agglomerate and instability, which may lead to unsatisfactory remediation efficiencies. Herein, a novel Fe<sub>1-x</sub>S/kaolinite composite (Fe<sub>1-x</sub>S@K), derived from the transformation of FeS/kaolinite (FeS@K) material in an acidic condition, demonstrates efficient simultaneous removal of Cd(II) and benzo(<em>a</em>)pyrene (B[<em>a</em>]P) by ensuring excellent dispersion and stability. Notably, the 0.6-Fe<sub>1-x</sub>S@K/peroxymonosulfate (PMS) system removed 96.9% of Cd<sup>2+</sup> and 98.9% of B[<em>a</em>]P within 20 min, respectively. Mechanism analysis revealed that kaolinite modulates the particle size of Fe<sub>1-x</sub>S to effectively minimize the agglomeration, thereby facilitating the activation of PMS and enhancing both thermal and chemical stability. This significantly boosts the generation of reactive oxygen species (ROS), e.g., SO<sub>4</sub><sup>⋅−</sup>, <sup>⋅</sup>OH, <sup>1</sup>O<sub>2</sub>, and <sup>⋅</sup>O<sub>2</sub><sup>−</sup> in the degradation system, thus exhibits an exceptional potential for natural water and wastewater treatment due to its broad resistance to environmental interference. This work exemplifies a highly efficient sulfate radical-based advanced oxidation process for the removal of complex contaminants in water treatment.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"6 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115825","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}
Regulating the activation of hydrogen peroxide (H2O2) through constructing efficient metal catalysts is extensively utilized in various oxidation reaction processes. However, the exploration of the intrinsic mechanism for enhancing the effective activation of H2O2 at metal sites still faces challenges. Herein, the adsorption configuration and occurrence forms of H2O2 on B site in copper-based delafossite (CuBO2, BMn, Fe and Co) were demonstrated to be the core factor affecting H2O2 activation to generate specific radical for doxycycline hydrochloride (DOH) degradation. The phytotoxicity and antimicrobial activity of DOH was significantly reduced by H2O2 activated on Mn sites compared with Fe and Co sites. The Mn sites facilitated charge transfer between the copper-based delafossite and H2O2, and overcame the lower energy barrier (0.233 eV) of H2O2 to transition state than Fe site (0.421 eV) and Co site (0.418 eV). The longest bond length of OO and the shortest bond length of OH in H2O2 adsorbed on Mn sites promoted H2O2 activation to •OH, whereas H2O2 adsorbed on Fe site and Co site were more easily decomposed into HO2•/•O2− radicals or O2 by breaking OH bonds. The excessively weak binding force of Mn site promoted diffusion of •OH into solution for dissociated •OH generation, which was also confirmed by the results of experimental tests. The developed flow activated H2O2 device with CuMnO2 in-situ grown on copper foam (CuMnO2/Cu foam) as catalyst showed superior treatment performance of various refractory organic contaminants and anti-interference ability. The successful trial operation of flow activated H2O2 device paves the way for promoting water purification and solving the problem of catalyst separation in purified water.
{"title":"Boosted H2O2 activation to dissociated hydroxyl radical by regulating B sites in copper-based delafossite for contaminants degradation: Key role on adsorption configuration and occurrence forms","authors":"Jiang Li, Haoran Zhang, Sihao Fu, Yunfei Wang, Kun Liu, Yujiao Liu, Tianjie Su, Lingyu Meng, Guocheng Liu, Qinghua Yan, Chengzhi Zhou, Yanjun Xin, Shuaishuai Xin","doi":"10.1016/j.seppur.2026.137120","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137120","url":null,"abstract":"Regulating the activation of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) through constructing efficient metal catalysts is extensively utilized in various oxidation reaction processes. However, the exploration of the intrinsic mechanism for enhancing the effective activation of H<sub>2</sub>O<sub>2</sub> at metal sites still faces challenges. Herein, the adsorption configuration and occurrence forms of H<sub>2</sub>O<sub>2</sub> on B site in copper-based delafossite (CuBO<sub>2</sub>, B<img alt=\"double bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/dbnd.gif\" style=\"vertical-align:middle\"/>Mn, Fe and Co) were demonstrated to be the core factor affecting H<sub>2</sub>O<sub>2</sub> activation to generate specific radical for doxycycline hydrochloride (DOH) degradation. The phytotoxicity and antimicrobial activity of DOH was significantly reduced by H<sub>2</sub>O<sub>2</sub> activated on Mn sites compared with Fe and Co sites. The Mn sites facilitated charge transfer between the copper-based delafossite and H<sub>2</sub>O<sub>2</sub>, and overcame the lower energy barrier (0.233 eV) of H<sub>2</sub>O<sub>2</sub> to transition state than Fe site (0.421 eV) and Co site (0.418 eV). The longest bond length of O<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>O and the shortest bond length of O<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>H in H<sub>2</sub>O<sub>2</sub> adsorbed on Mn sites promoted H<sub>2</sub>O<sub>2</sub> activation to <sup>•</sup>OH, whereas H<sub>2</sub>O<sub>2</sub> adsorbed on Fe site and Co site were more easily decomposed into HO<sub>2</sub><sup>•</sup>/<sup>•</sup>O<sub>2</sub><sup>−</sup> radicals or O<sub>2</sub> by breaking O<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>H bonds. The excessively weak binding force of Mn site promoted diffusion of <sup>•</sup>OH into solution for dissociated <sup>•</sup>OH generation, which was also confirmed by the results of experimental tests. The developed flow activated H<sub>2</sub>O<sub>2</sub> device with CuMnO<sub>2</sub> in-situ grown on copper foam (CuMnO<sub>2</sub>/Cu foam) as catalyst showed superior treatment performance of various refractory organic contaminants and anti-interference ability. The successful trial operation of flow activated H<sub>2</sub>O<sub>2</sub> device paves the way for promoting water purification and solving the problem of catalyst separation in purified water.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"28 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135563","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 : 2026-02-05DOI: 10.1016/j.seppur.2026.137153
Huaming Dai, Yang Xiao, Yi Yang
The catalytic partial oxidation of methane represents a safe and efficient route to syngas production. In this study, the perovskite catalysts doped with A/B-site elements were prepared via the citric acid sol-gel method using rapeseed pollen and straw as plant templates. Then they were loaded onto a composite porous media burner to investigate their activity regulation mechanism and the combination structure's impact on the partial oxidation of methane. Results indicate that the plant-template method effectively regulates the catalysts' microstructure and surface chemistry, thereby enhancing their activity. Notably, the Ce0.2-P3 catalyst doped with 3 g rapeseed pollen exhibited the largest specific surface area (12.81 m2/g) and optimal performance, achieving the highest methane conversion (98.53%) and a 17.8% increase in preheating efficiency over the undoped catalyst. Furthermore, the B-site-defective LCC-B0.8 catalyst, yielding syngas with a higher hydrogen content (12.6%), attained the maximum energy conversion efficiency (52.97%) while reducing the preheating time to 675 s. The integration of this optimized catalyst with a combined porous burner structure significantly promoted the methane partial oxidation efficiency and syngas yield through enhanced heat transfer and energy coupling. These results provide crucial theoretical and practical insights for designing high-performance catalysts and optimizing burner structures toward efficient and stable methane-based hydrogen production.
{"title":"Synthesis of porous perovskite by a biological template method for catalytic partial oxidation of methane based on heat recirculation","authors":"Huaming Dai, Yang Xiao, Yi Yang","doi":"10.1016/j.seppur.2026.137153","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.137153","url":null,"abstract":"The catalytic partial oxidation of methane represents a safe and efficient route to syngas production. In this study, the perovskite catalysts doped with A/B-site elements were prepared via the citric acid sol-gel method using rapeseed pollen and straw as plant templates. Then they were loaded onto a composite porous media burner to investigate their activity regulation mechanism and the combination structure's impact on the partial oxidation of methane. Results indicate that the plant-template method effectively regulates the catalysts' microstructure and surface chemistry, thereby enhancing their activity. Notably, the Ce0.2-P3 catalyst doped with 3 g rapeseed pollen exhibited the largest specific surface area (12.81 m<sup>2</sup>/g) and optimal performance, achieving the highest methane conversion (98.53%) and a 17.8% increase in preheating efficiency over the undoped catalyst. Furthermore, the B-site-defective LCC-B0.8 catalyst, yielding syngas with a higher hydrogen content (12.6%), attained the maximum energy conversion efficiency (52.97%) while reducing the preheating time to 675 s. The integration of this optimized catalyst with a combined porous burner structure significantly promoted the methane partial oxidation efficiency and syngas yield through enhanced heat transfer and energy coupling. These results provide crucial theoretical and practical insights for designing high-performance catalysts and optimizing burner structures toward efficient and stable methane-based hydrogen production.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"241 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115824","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}
MXene-based photocatalysts have demonstrated excellent potential for the selective conversion of hazardous nitric oxide (NO). In this work, Ag/AgCl@Bi–MXene nanocomposites were successfully synthesized using a dual-etching-assisted strategy and systematically implemented for the photocatalytic NO removal. Characterization results confirmed the successful anchoring of Ag/AgCl nanoparticles and Bi incorporation onto MXene nanosheets, resulting in enhanced crystallinity and strong interfacial interactions. The photoluminescence (PL) and electron paramagnetic resonance (EPR) studies demonstrated suppressed charge recombination and surface defect states. Ag/AgCl nanoparticles on Mxene sheets can promote the formation of hot electrons and plasmonic effects, thereby favorably influencing the optical response. The optimized Ag/AgCl@Bi–MXene construction displayed 65.2% of NO removal in 10 min, substantially higher than Bi–MXene (38.6%), Ag/AgCl@MXene (51.4%), and pristine MXene (22.3%). Notably, NO₂ byproduct formation remained below 10 ppb, ensuring high selectivity. Quenching and electron spin resonance (ESR) experiments identified photogenerated electrons and O₂•- radicals as the dominant reactive species, supported by in-situ diffuse reflectance infrared fourier transform spectroscopy (DRIFTS). Complementary density functional theory (DFT) calculations revealed bandgap alteration, an increased density of states near the Fermi level, and metallic-like behavior induced by Bi and Ag/AgCl, which corroborates the dual plasmonic enhancement and efficient ohmic contact at the Bi–MXene/AgCl interface. These synergistic effects collectively enable superior charge separation, directional electron transport, and light harvesting, establishing Ag/AgCl@Bi–MXene as a promising photocatalyst for light-driven NO abatement.
{"title":"Unveiling the potential of plasmonic Ag/AgCl@Bi-MXene photocatalysts for selective NO removal","authors":"Mohsen Padervand, Shahnaz Ghasemi, Ali Abdollahi, Hui Wang, Wei Shuwei, Elham Abdollahzadeh Sharghi, Mohammadreza Elahifard, Abdelkader Labidi, Elmuez Dawi, Michela Signoretto, Chuanyi Wang","doi":"10.1016/j.seppur.2026.136921","DOIUrl":"https://doi.org/10.1016/j.seppur.2026.136921","url":null,"abstract":"MXene-based photocatalysts have demonstrated excellent potential for the selective conversion of hazardous nitric oxide (NO). In this work, Ag/AgCl@Bi–MXene nanocomposites were successfully synthesized using a dual-etching-assisted strategy and systematically implemented for the photocatalytic NO removal. Characterization results confirmed the successful anchoring of Ag/AgCl nanoparticles and Bi incorporation onto MXene nanosheets, resulting in enhanced crystallinity and strong interfacial interactions. The photoluminescence (PL) and electron paramagnetic resonance (EPR) studies demonstrated suppressed charge recombination and surface defect states. Ag/AgCl nanoparticles on Mxene sheets can promote the formation of hot electrons and plasmonic effects, thereby favorably influencing the optical response. The optimized Ag/AgCl@Bi–MXene construction displayed 65.2% of NO removal in 10 min, substantially higher than Bi–MXene (38.6%), Ag/AgCl@MXene (51.4%), and pristine MXene (22.3%). Notably, NO₂ byproduct formation remained below 10 ppb, ensuring high selectivity. Quenching and electron spin resonance (ESR) experiments identified photogenerated electrons and O₂<sup>•-</sup> radicals as the dominant reactive species, supported by in-situ diffuse reflectance infrared fourier transform spectroscopy (DRIFTS). Complementary density functional theory (DFT) calculations revealed bandgap alteration, an increased density of states near the Fermi level, and metallic-like behavior induced by Bi and Ag/AgCl, which corroborates the dual plasmonic enhancement and efficient ohmic contact at the Bi–MXene/AgCl interface. These synergistic effects collectively enable superior charge separation, directional electron transport, and light harvesting, establishing Ag/AgCl@Bi–MXene as a promising photocatalyst for light-driven NO abatement.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"48 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135569","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}
Mn, Fe and Co) were demonstrated to be the core factor affecting H2O2 activation to generate specific radical for doxycycline hydrochloride (DOH) degradation. The phytotoxicity and antimicrobial activity of DOH was significantly reduced by H2O2 activated on Mn sites compared with Fe and Co sites. The Mn sites facilitated charge transfer between the copper-based delafossite and H2O2, and overcame the lower energy barrier (0.233 eV) of H2O2 to transition state than Fe site (0.421 eV) and Co site (0.418 eV). The longest bond length of O
O and the shortest bond length of O
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