Separation and Purification Technology最新文献_第7页

Halophyte-derived biochar for organic removal from biogas slurry: Tunable adsorption performance and mechanism by feedstock type and pyrolysis temperature 盐生植物衍生生物炭去除沼液中的有机物：根据原料类型和热解温度可调的吸附性能和机理

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-27 DOI: 10.1016/j.seppur.2026.137060

Wancen Xie , Jiuxian Zhao , Peng Tang , Li Jiang , Ancheng Luo , Qiyun Tian , Hongbing Luo , Xiaochan An , Wei Chen , Xiao Ma

Halophyte cultivation is an effective approach for reclaiming saline–alkaline soils, yet high-value utilization of the abundant residual biomass remains underexplored. Converting these residues into biochar provides a sustainable pathway for both waste valorization and environmental remediation. Herein, Salicornia europaea L. (S. europaea, salt-accumulating) and Apocynum pictum Schrenk (A. pictum, salt-excluding), two halophytes with distinct salt-tolerance strategies, were pyrolyzed at 300–800 °C to elucidate how feedstock characteristics and pyrolysis temperature govern biochar physicochemical properties and adsorption mechanisms. S. europaea-derived biochars developed well-defined micro−/mesoporous structures enriched with cations, attributable to their inherent high salt content and salt-compartmentalized structure, whereas A. pictum-derived biochars exhibited much poorer pore structure due to their low-salt, high-lignocellulosic properties. For S. europaea-derived biochars, increased pyrolysis temperature simultaneously enhanced pore structure and surface chemistry, shifting adsorption from predominantly physical to chemical contributions, driven by hydrogen bonding formation and π-π interactions. In contrast, A. pictum-derived biochars showed the opposite trend, transitioning from predominantly chemical to physical adsorption with increasing temperature, mainly due to strengthened pore filling and a marked loss of nitrogen/oxygen-containing functional groups, hydrophilicity and surface electronegativity. Among all samples, S. europaea-derived biochar produced at 700 °C achieved the best performance for livestock biogas slurry treatment, removing dissolved organic carbon (DOC, 47.54%) and UV₂₅₄ (59.98%), with a DOC adsorption capacity of 10.52 mg/g. These findings highlighted the pivotal roles of feedstock property and pyrolysis conditions in tailoring biochar adsorption mechanisms, offering a novel route to integrate saline land restoration with wastewater treatment through high-value utilization of halophyte residues.

盐生植物种植是盐碱地复垦的有效途径，但其丰富的剩余生物量的高价值利用尚未得到充分开发。将这些残留物转化为生物炭为废物增值和环境修复提供了一个可持续的途径。本文以Salicornia europaea L. （S. europaea，盐富集）和Apocynum pictum Schrenk （A. pictum，盐不富集）这两种具有不同耐盐策略的盐生植物为研究对象，在300-800℃条件下对其进行热解，以阐明原料特性和热解温度对生物炭理化性质和吸附机理的影响。由于其固有的高含盐量和盐区隔结构，木质素衍生的生物炭具有明确的微孔/介孔结构，富含阳离子，而木质素衍生的生物炭由于其低盐，高木质纤维素性质而具有较差的孔隙结构。对于S. europaea衍生的生物炭，热解温度的升高同时增强了孔隙结构和表面化学性质，在氢键形成和π-π相互作用的驱动下，将吸附从主要的物理作用转变为化学作用。与之相反的是，随着温度的升高，生物炭的吸附主要由化学吸附向物理吸附转变，这主要是由于孔隙填充增强、含氮/含氧官能团、亲水性和表面电负性的显著丧失。其中，700℃条件下制备的木质素生物炭处理畜禽沼液的效果最好，去除溶解有机碳（DOC） 47.54%, UV254(59.98%)，对DOC的吸附量为10.52 mg/g。这些发现强调了原料性质和热解条件在定制生物炭吸附机制中的关键作用，为通过盐生植物残留物的高价值利用将盐碱地恢复与废水处理结合起来提供了一条新途径。

{"title":"Halophyte-derived biochar for organic removal from biogas slurry: Tunable adsorption performance and mechanism by feedstock type and pyrolysis temperature","authors":"Wancen Xie , Jiuxian Zhao , Peng Tang , Li Jiang , Ancheng Luo , Qiyun Tian , Hongbing Luo , Xiaochan An , Wei Chen , Xiao Ma","doi":"10.1016/j.seppur.2026.137060","DOIUrl":"10.1016/j.seppur.2026.137060","url":null,"abstract":"<div><div>Halophyte cultivation is an effective approach for reclaiming saline–alkaline soils, yet high-value utilization of the abundant residual biomass remains underexplored. Converting these residues into biochar provides a sustainable pathway for both waste valorization and environmental remediation. Herein, <em>Salicornia europaea</em> L. (<em>S. europaea</em>, salt-accumulating) and <em>Apocynum pictum</em> Schrenk (<em>A. pictum</em>, salt-excluding), two halophytes with distinct salt-tolerance strategies, were pyrolyzed at 300–800 °C to elucidate how feedstock characteristics and pyrolysis temperature govern biochar physicochemical properties and adsorption mechanisms. <em>S. europaea</em>-derived biochars developed well-defined micro−/mesoporous structures enriched with cations, attributable to their inherent high salt content and salt-compartmentalized structure, whereas <em>A. pictum</em>-derived biochars exhibited much poorer pore structure due to their low-salt, high-lignocellulosic properties. For <em>S. europaea</em>-derived biochars, increased pyrolysis temperature simultaneously enhanced pore structure and surface chemistry, shifting adsorption from predominantly physical to chemical contributions, driven by hydrogen bonding formation and π-π interactions. In contrast, <em>A. pictum</em>-derived biochars showed the opposite trend, transitioning from predominantly chemical to physical adsorption with increasing temperature, mainly due to strengthened pore filling and a marked loss of nitrogen/oxygen-containing functional groups, hydrophilicity and surface electronegativity. Among all samples, <em>S. europaea</em>-derived biochar produced at 700 °C achieved the best performance for livestock biogas slurry treatment, removing dissolved organic carbon (DOC, 47.54%) and UV<sub>254</sub> (59.98%), with a DOC adsorption capacity of 10.52 mg/g. These findings highlighted the pivotal roles of feedstock property and pyrolysis conditions in tailoring biochar adsorption mechanisms, offering a novel route to integrate saline land restoration with wastewater treatment through high-value utilization of halophyte residues.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"391 ","pages":"Article 137060"},"PeriodicalIF":9.0,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077200","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}

引用次数: 0

Vitamin B12 derived cobalt‑boron biochar: An eco-friendly powerhouse for enhanced calcium sulfite activation and fast clothianidin degradation 维生素B12衍生的钴硼生物炭：增强亚硫酸钙活化和快速噻虫胺降解的环保发电站

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-27 DOI: 10.1016/j.seppur.2026.137052

Peilin Li, Chunyang Hu, Yiwen Cui, Nanxi Song, Tianming Li, Yian Zheng

Neonicotinoid pesticides such as clothianidin (CLO) are widespread and persistent aquatic contaminants. Developing eco-friendly catalytic materials derived from natural sources is essential for advancing sustainable advanced oxidation processes (AOPs) for CLO degradation. Featured with sustainability and tunable catalytic properties, carbon-based catalysts sourced from natural materials show promise in effectively activating calcium sulfite (CaSO₃) to generate reactive species capable of rapidly degrading CLO in water. In this study, a cobalt‑boron co-doped biochar (CoBGG) was synthesized through pyrolysis, using vitamin B12 (VITB₁₂) as a natural Co precursor and a borax-crosslinked guar gum hydrogel as a three-dimensional microreactor. Under optimized conditions (0.10 g/L CoBGG, 0.10 g/L CaSO₃, pH 6.87), the CoBGG/CaSO₃ system achieved >95% removal for 10 mg/L CLO within 10 min and 98% within 60 min. SO₃^•−, SO₄^•− and ¹O₂ were identified as dominant reactive species, and degradation pathways, supported by Fukui function analysis, included nitro-reduction, cleavage of nitroguanidine-thiazole bond and thiazole ring opening. This led to the formation of transformation products with generally reduced toxicity. This study demonstrates the effectiveness and sustainability of AOPs based on VITB₁₂-derived CoBGG and industrial byproduct sulfite, offering a promising strategy for the treatment of neonicotinoid-contaminated wastewater.

新烟碱类杀虫剂如噻虫胺（cloo）是广泛存在的持久性水生污染物。开发来自天然资源的环保催化材料对于推进可持续的高级氧化工艺（AOPs）降解CLO至关重要。来源于天然材料的碳基催化剂具有可持续性和可调的催化性能，有望有效激活亚硫酸钙（CaSO3），生成能够快速降解水中CLO的活性物质。本研究以维生素B12 （VITB12）为天然Co前驱体，以硼砂交联瓜尔胶水凝胶为三维微反应器，通过热解合成钴硼共掺杂生物炭（CoBGG）。在优化条件（0.10 g/L CoBGG, 0.10 g/L CaSO3, pH 6.87）下，cogg /CaSO3体系对10 mg/L CLO的去除率在10 min内达到95%，在60 min内达到98%。结果表明，SO3•−、SO4•−和1O2是主要的活性物质，其降解途径包括硝基还原、硝基胍-噻唑键的裂解和噻唑环的打开。这导致形成毒性普遍降低的转化产物。本研究证明了基于vitb12衍生的CoBGG和工业副产物亚硫酸盐的AOPs的有效性和可持续性，为处理新烟碱污染废水提供了一种有前途的策略。

{"title":"Vitamin B12 derived cobalt‑boron biochar: An eco-friendly powerhouse for enhanced calcium sulfite activation and fast clothianidin degradation","authors":"Peilin Li, Chunyang Hu, Yiwen Cui, Nanxi Song, Tianming Li, Yian Zheng","doi":"10.1016/j.seppur.2026.137052","DOIUrl":"10.1016/j.seppur.2026.137052","url":null,"abstract":"<div><div>Neonicotinoid pesticides such as clothianidin (CLO) are widespread and persistent aquatic contaminants. Developing eco-friendly catalytic materials derived from natural sources is essential for advancing sustainable advanced oxidation processes (AOPs) for CLO degradation. Featured with sustainability and tunable catalytic properties, carbon-based catalysts sourced from natural materials show promise in effectively activating calcium sulfite (CaSO<sub>3</sub>) to generate reactive species capable of rapidly degrading CLO in water. In this study, a cobalt‑boron co-doped biochar (CoBGG) was synthesized through pyrolysis, using vitamin B12 (VITB<sub>12</sub>) as a natural Co precursor and a borax-crosslinked guar gum hydrogel as a three-dimensional microreactor. Under optimized conditions (0.10 g/L CoBGG, 0.10 g/L CaSO<sub>3</sub>, pH 6.87), the CoBGG/CaSO<sub>3</sub> system achieved >95% removal for 10 mg/L CLO within 10 min and 98% within 60 min. SO<sub>3</sub><sup>•−</sup>, SO<sub>4</sub><sup>•−</sup> and <sup>1</sup>O<sub>2</sub> were identified as dominant reactive species, and degradation pathways, supported by Fukui function analysis, included nitro-reduction, cleavage of nitroguanidine-thiazole bond and thiazole ring opening. This led to the formation of transformation products with generally reduced toxicity. This study demonstrates the effectiveness and sustainability of AOPs based on VITB<sub>12</sub>-derived CoBGG and industrial byproduct sulfite, offering a promising strategy for the treatment of neonicotinoid-contaminated wastewater.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"391 ","pages":"Article 137052"},"PeriodicalIF":9.0,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048076","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}

引用次数: 0

Fungal biosorption for the selective removal of Al and Cu from Li-ion battery leachates 真菌生物吸附法选择性去除锂离子电池渗滤液中的Al和Cu

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-27 DOI: 10.1016/j.seppur.2026.136995

Daniela Romero Guillén , Luciana Jandelli Gimenes , Denise Crocce Romano Espinosa , Tatiana Alves dos Reis , Jorge Alberto Soares Tenório , Marcela dos Passos Galluzzi Baltazar

The increasing demand for critical metals in clean energy technologies has driven the search for sustainable recovery methods from secondary sources, such as spent lithium-ion batteries (Li-ion). This study investigated the biosorption potential of three fungal species: Aspergillus niger (A. niger), Aspergillus flavus (A. flavus), and Penicillium simplicissimum (P. simplicissimum) for the removal of impurities from leachates obtained from NMC532 Li-ion battery black mass. This work is the first or among the first systematic studies of fungal biosorption applied directly to Li-ion battery leachates. Experiments were conducted in real leachates to evaluate the influence of pH, contact time, and agitation speed. Metal interference on biosorption performance using mono-element and multi-element solutions that simulate real leachates was studied as well. Results showed that biosorption occurs in two phases: a rapid initial phase within 30–60 min, followed by a slower approach to equilibrium. Among the species studied, A. flavus exhibited the highest biosorption capacity for nickel (Ni), manganese (Mn), cobalt (Co), and copper (Cu), particularly in mono-element solutions, whereas P. simplicissimum demonstrated superior stability in multi-element and real solutions, showing resilience to ion competition. A. niger consistently exhibited lower biosorption performance, except for aluminum (Al). The optimal conditions for Cu and Al removal were identified at pH 5–6, 60 min, and 125–150 rpm, minimizing the loss of metals such as Ni. The study highlights the impact of ionic competition and solution complexity on biosorption efficiency, providing insights for the development of fungal-based processes for the purification of battery leachates.

清洁能源技术对关键金属的需求日益增长，推动了对二手资源（如废锂离子电池）的可持续回收方法的探索。研究了黑曲霉（Aspergillus niger）、黄曲霉（Aspergillus flavus）和单纯青霉（Penicillium simplicissimum）三种真菌对NMC532锂离子电池黑团浸出液中杂质的吸附潜力。这项工作是第一个或第一个系统研究真菌生物吸附直接应用于锂离子电池渗滤液。在真实的渗滤液中进行了实验，以评价pH、接触时间和搅拌速度对渗滤液的影响。在模拟真实渗滤液的单元素溶液和多元素溶液中，研究了金属干扰对生物吸附性能的影响。结果表明，生物吸附分两个阶段进行：30-60分钟内的快速初始阶段，随后缓慢接近平衡。在所研究的物种中，黄芽孢霉对镍（Ni）、锰（Mn）、钴（Co）和铜（Cu）的生物吸附能力最高，特别是在单元素溶液中；而单根孢霉在多元素和真实溶液中表现出优异的稳定性，表现出对离子竞争的弹性。除铝（Al）外，黑曲霉的生物吸附性能一直较低。确定了去除Cu和Al的最佳条件为pH 5-6, 60 min, 125-150 rpm，最大限度地减少了Ni等金属的损失。该研究强调了离子竞争和溶液复杂性对生物吸附效率的影响，为基于真菌的电池渗滤液净化工艺的发展提供了见解。

{"title":"Fungal biosorption for the selective removal of Al and Cu from Li-ion battery leachates","authors":"Daniela Romero Guillén , Luciana Jandelli Gimenes , Denise Crocce Romano Espinosa , Tatiana Alves dos Reis , Jorge Alberto Soares Tenório , Marcela dos Passos Galluzzi Baltazar","doi":"10.1016/j.seppur.2026.136995","DOIUrl":"10.1016/j.seppur.2026.136995","url":null,"abstract":"<div><div>The increasing demand for critical metals in clean energy technologies has driven the search for sustainable recovery methods from secondary sources, such as spent lithium-ion batteries (Li-ion). This study investigated the biosorption potential of three fungal species: Aspergillus niger (<em>A. niger</em>), Aspergillus flavus (<em>A. flavus</em>), and Penicillium simplicissimum (<em>P. simplicissimum</em>) for the removal of impurities from leachates obtained from NMC532 Li-ion battery black mass. This work is the first or among the first systematic studies of fungal biosorption applied directly to Li-ion battery leachates. Experiments were conducted in real leachates to evaluate the influence of pH, contact time, and agitation speed. Metal interference on biosorption performance using mono-element and multi-element solutions that simulate real leachates was studied as well. Results showed that biosorption occurs in two phases: a rapid initial phase within 30–60 min, followed by a slower approach to equilibrium. Among the species studied, <em>A. flavus</em> exhibited the highest biosorption capacity for nickel (Ni), manganese (Mn), cobalt (Co), and copper (Cu), particularly in mono-element solutions, whereas <em>P. simplicissimum</em> demonstrated superior stability in multi-element and real solutions, showing resilience to ion competition. <em>A. niger</em> consistently exhibited lower biosorption performance, except for aluminum (Al). The optimal conditions for Cu and Al removal were identified at pH 5–6, 60 min, and 125–150 rpm, minimizing the loss of metals such as Ni. The study highlights the impact of ionic competition and solution complexity on biosorption efficiency, providing insights for the development of fungal-based processes for the purification of battery leachates.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"391 ","pages":"Article 136995"},"PeriodicalIF":9.0,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077133","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}

引用次数: 0

Nitrogen doping of porous carbons derived from CaCO3 nanofluids for enhanced CO2 adsorption. CaCO3纳米流体制备的多孔碳的氮掺杂增强CO2吸附。

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-27 DOI: 10.1016/j.seppur.2026.136961

Haiying Xiao , Mingdong Li , Ying Qin , Zhangfa TONG , Lishuo Li

Abstract

A sustainable and integrated strategy is developed for the synthesis of nitrogen-doped porous carbons (HNPCs) using organically modified CaCO₃ nanofluids as multifunctional precursors, and their CO₂ separation performance is systematically evaluated. Cubic and spherical CaCO₃ nanofluids were prepared using M2070 and KH560 as organic modifiers to form an organic crown-like structure, followed by programmed pyrolysis at 800 °C to obtain HNPCs. The obtained HNPCs exhibit well-developed porous structures with a high BET surface area of 777.3 m²·g⁻¹, a micropore volume of 0.0928 cm³·g⁻¹, and a nitrogen content of 2.79 wt% (elemental analysis). XPS analysis reveals that pyrrolic N (48.98%) and pyridinic N (26.47%) are the dominant nitrogen species, contributing to enhanced CO₂ adsorption affinity. The spherical CaCO₃-derived sample (SNPC(II)) shows superior CO₂ uptake capacities of 2.85 mmol·g⁻¹ at 25 °C and 3.98 mmol·g⁻¹ at 0 °C under 1 bar. The isosteric heat of adsorption ranges from 17.3 to 36.5 kJ·mol⁻¹, indicating a physisorption-dominated and energy-efficient process. Ideal Adsorbed Solution Theory predicts a CO₂/N₂ selectivity of 34.19 at 298 K and 1 bar. Fixed-bed breakthrough experiments using simulated flue gas (15 vol% CO₂/85 vol% N₂) demonstrate a CO₂ breakthrough time of 4631 s·g⁻¹, markedly longer than that of N₂ (342 s·g⁻¹). Moreover, SNPC(II) retains 98.7% of its initial CO₂ capacity after eight adsorption–desorption cycles, highlighting excellent cyclic stability.

摘要采用有机改性CaCO₃纳米流体作为多功能前驱体制备了氮掺杂多孔碳（HNPCs），并对其CO₂分离性能进行了系统评价。以M2070和KH560为有机改性剂制备立方和球形CaCO3纳米流体，形成有机冠状结构，然后在800℃下程序热解得到HNPCs。所得HNPCs具有良好的孔隙结构，BET表面积为777.3 m2·g−1，微孔体积为0.0928 cm3·g−1，含氮量为2.79 wt%（元素分析）。XPS分析表明，吡啶氮（48.98%）和吡啶氮（26.47%）是优势氮种，有助于增强CO 2的吸附亲和力。球形CaCO₃衍生样品（SNPC(II)）在1 bar下，在25℃下具有2.85 mmol·g−1的吸收率，在0℃下具有3.98 mmol·g−1的吸收率。等等吸附热范围为17.3 ~ 36.5 kJ·mol−1，表明该过程以物理吸附为主，节能高效。理想吸附溶液理论预测，在298 K和1 bar条件下，CO2/N2选择性为34.19。模拟烟气（15 vol% CO₂/85 vol% N₂）的固定床突破实验表明，CO₂的突破时间为4631 s·g−1，明显长于N₂的突破时间（342 s·g−1）。此外，SNPC（II）在8次吸附-解吸循环后仍能保持其初始CO₂容量的98.7%，表现出良好的循环稳定性。

{"title":"Nitrogen doping of porous carbons derived from CaCO3 nanofluids for enhanced CO2 adsorption.","authors":"Haiying Xiao , Mingdong Li , Ying Qin , Zhangfa TONG , Lishuo Li","doi":"10.1016/j.seppur.2026.136961","DOIUrl":"10.1016/j.seppur.2026.136961","url":null,"abstract":"<div><div>Abstract</div><div>A sustainable and integrated strategy is developed for the synthesis of nitrogen-doped porous carbons (HNPCs) using organically modified CaCO₃ nanofluids as multifunctional precursors, and their CO₂ separation performance is systematically evaluated. Cubic and spherical CaCO<sub>3</sub> nanofluids were prepared using M2070 and KH560 as organic modifiers to form an organic crown-like structure, followed by programmed pyrolysis at 800 °C to obtain HNPCs. The obtained HNPCs exhibit well-developed porous structures with a high BET surface area of 777.3 m<sup>2</sup>·g<sup>−1</sup>, a micropore volume of 0.0928 cm<sup>3</sup>·g<sup>−1</sup>, and a nitrogen content of 2.79 wt% (elemental analysis). XPS analysis reveals that pyrrolic N (48.98%) and pyridinic N (26.47%) are the dominant nitrogen species, contributing to enhanced CO₂ adsorption affinity. The spherical CaCO₃-derived sample (SNPC(II)) shows superior CO₂ uptake capacities of 2.85 mmol·g<sup>−1</sup> at 25 °C and 3.98 mmol·g<sup>−1</sup> at 0 °C under 1 bar. The isosteric heat of adsorption ranges from 17.3 to 36.5 kJ·mol<sup>−1</sup>, indicating a physisorption-dominated and energy-efficient process. Ideal Adsorbed Solution Theory predicts a CO<sub>2</sub>/N<sub>2</sub> selectivity of 34.19 at 298 K and 1 bar. Fixed-bed breakthrough experiments using simulated flue gas (15 vol% CO₂/85 vol% N₂) demonstrate a CO₂ breakthrough time of 4631 s·g<sup>−1</sup>, markedly longer than that of N₂ (342 s·g<sup>−1</sup>). Moreover, SNPC(II) retains 98.7% of its initial CO₂ capacity after eight adsorption–desorption cycles, highlighting excellent cyclic stability.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"391 ","pages":"Article 136961"},"PeriodicalIF":9.0,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077284","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}

引用次数: 0

Artificial intelligence-accelerated solvent screening for CO₂ capture in rotating packed beds: Economic impact and decision-support insights 旋转填料床中CO₂捕获的人工智能加速溶剂筛选：经济影响和决策支持见解

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-27 DOI: 10.1016/j.seppur.2026.137013

Mohammadu Bello Danbatta , Nasser Ahmed Al-Azri , Muhammad Abdul Qyyum , Nabeel Al-Rawahi

Rotating packed beds (RPBs) offer a compact and energy-efficient alternative to conventional absorbers for post-combustion CO₂ capture; however, their large-scale deployment is limited by the time and cost required for solvent evaluation and operational optimization. This study introduces an artificial intelligence-enabled framework that couples solvent selection with process-condition optimization to enhance CO₂ absorption performance in RPB systems. The framework combines machine-learning and reinforcement-learning methods to represent key RPB parameters, including revolution speed, gas–liquid flow ratios, solvent concentration, and temperature. It achieved a predictive accuracy of 92.8%, improving performance by more than 110% compared with conventional approaches, and enabled rapid identification of optimum solvent-operation pairs under realistic industrial ranges. The framework reduced evaluation time from weeks to hours while maintaining physical consistency and engineering reliability. When applied to process-level assessment, the AI-enabled configuration lowered capital and operating costs by 40% and 30%, respectively, and decreased the levelized cost of CO₂ capture from $63 to $40 per ton of CO₂. The economic advantage further widens under elevated energy prices, highlighting the framework's robustness and scalability. Integrating artificial intelligence with process-intensification principles, therefore, offers a practical pathway toward faster, cost-effective, and industrially viable RPB-based carbon capture.

旋转填充床（rpb）提供了一种紧凑和节能的替代传统的吸收器，用于燃烧后的二氧化碳捕获；然而，它们的大规模部署受到溶剂评估和操作优化所需的时间和成本的限制。本研究引入了一种人工智能框架，将溶剂选择与工艺条件优化相结合，以提高RPB系统的CO 2吸收性能。该框架结合了机器学习和强化学习方法来表示关键的RPB参数，包括转速、气液流量比、溶剂浓度和温度。与传统方法相比，该方法的预测准确率达到92.8%，提高了110%以上，并能够在实际工业范围内快速识别最佳溶剂操作对。该框架在保持物理一致性和工程可靠性的同时，将评估时间从数周减少到数小时。当应用于流程级评估时，启用人工智能的配置将资本和运营成本分别降低了40%和30%，并将二氧化碳捕获的平均成本从每吨63美元降至40美元。在能源价格上涨的情况下，经济优势进一步扩大，凸显了该框架的稳健性和可扩展性。因此，将人工智能与过程强化原理相结合，为实现更快、更具成本效益和工业上可行的基于rpb的碳捕获提供了一条切实可行的途径。

{"title":"Artificial intelligence-accelerated solvent screening for CO₂ capture in rotating packed beds: Economic impact and decision-support insights","authors":"Mohammadu Bello Danbatta , Nasser Ahmed Al-Azri , Muhammad Abdul Qyyum , Nabeel Al-Rawahi","doi":"10.1016/j.seppur.2026.137013","DOIUrl":"10.1016/j.seppur.2026.137013","url":null,"abstract":"<div><div>Rotating packed beds (RPBs) offer a compact and energy-efficient alternative to conventional absorbers for post-combustion CO₂ capture; however, their large-scale deployment is limited by the time and cost required for solvent evaluation and operational optimization. This study introduces an artificial intelligence-enabled framework that couples solvent selection with process-condition optimization to enhance CO₂ absorption performance in RPB systems. The framework combines machine-learning and reinforcement-learning methods to represent key RPB parameters, including revolution speed, gas–liquid flow ratios, solvent concentration, and temperature. It achieved a predictive accuracy of 92.8%, improving performance by more than 110% compared with conventional approaches, and enabled rapid identification of optimum solvent-operation pairs under realistic industrial ranges. The framework reduced evaluation time from weeks to hours while maintaining physical consistency and engineering reliability. When applied to process-level assessment, the AI-enabled configuration lowered capital and operating costs by 40% and 30%, respectively, and decreased the levelized cost of CO₂ capture from $63 to $40 per ton of CO₂. The economic advantage further widens under elevated energy prices, highlighting the framework's robustness and scalability. Integrating artificial intelligence with process-intensification principles, therefore, offers a practical pathway toward faster, cost-effective, and industrially viable RPB-based carbon capture.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"391 ","pages":"Article 137013"},"PeriodicalIF":9.0,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077130","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}

引用次数: 0

Facile surface modification of 3D-printed biopolymer filter via acetone treatment for enhanced copper hexacyanoferrate immobilization and selective ammonium capture 丙酮处理对3d打印生物聚合物过滤器表面的简单改性，以增强六氰亚铁酸铜的固定化和选择性铵捕获

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-27 DOI: 10.1016/j.seppur.2026.137057

Narges Dehbashi Nia , Bokseong Kim , Yuhoon Hwang

Ammonium contamination poses a significant environmental concern due to its adverse impacts on aquatic ecosystems, including oxygen depletion, reproductive disorders in aquatic organisms, and the proliferation of harmful algal blooms that release toxic compounds. These effects deteriorate water quality and threaten ecosystem stability, underscoring the need for effective and selective ammonium removal strategies. In this study, copper hexacyanoferrate (CuHCF), a Prussian blue analogue with strong affinity for ammonium ions, was immobilized onto acetone-pretreated three-dimensional (3D)-printed polylactic acid (PLA) filters. Acetone pretreatment chemically etched the PLA surface, increasing surface porosity and hydrophilicity, thereby enhancing surface reactivity for subsequent functionalization and CuHCF immobilization. This surface engineering strategy enabled uniform and stable distribution of CuHCF particles on the biopolymer scaffold, resulting in improved adsorption performance and structural stability. The fabricated filter exhibited an ammonium adsorption capacity of 1.91 mg/g and maintained over 90% regeneration efficiency across five adsorption–desorption cycles. Continuous column experiments further demonstrated stable operation for up to 40 h without significant performance deterioration. Overall, this work presents a simple and scalable approach for fabricating 3D-structured adsorbents via acetone-assisted surface modification, offering a practical platform for selective ammonium recovery and resource-oriented water treatment applications.

铵污染由于其对水生生态系统的不利影响，包括氧气消耗，水生生物的生殖障碍以及释放有毒化合物的有害藻华的增殖，引起了重大的环境问题。这些影响使水质恶化，威胁生态系统的稳定，强调需要有效和选择性的铵去除策略。在这项研究中，六氰高铁酸铜（CuHCF）是一种对铵离子具有强亲和力的普鲁士蓝类似物，它被固定在丙酮预处理的三维（3D）打印聚乳酸（PLA）过滤器上。丙酮预处理化学蚀刻PLA表面，增加表面孔隙度和亲水性，从而提高表面反应性，为后续的功能化和CuHCF固定提供支持。这种表面工程策略使得CuHCF颗粒在生物聚合物支架上均匀稳定地分布，从而提高了吸附性能和结构稳定性。制备的过滤器对铵的吸附量为1.91 mg/g，在5次吸附-解吸循环中保持了90%以上的再生效率。连续柱实验进一步证明稳定运行高达40 h，没有明显的性能下降。总的来说，这项工作提出了一种简单且可扩展的方法，通过丙酮辅助表面改性来制造3d结构吸附剂，为选择性铵回收和资源型水处理应用提供了一个实用的平台。

{"title":"Facile surface modification of 3D-printed biopolymer filter via acetone treatment for enhanced copper hexacyanoferrate immobilization and selective ammonium capture","authors":"Narges Dehbashi Nia , Bokseong Kim , Yuhoon Hwang","doi":"10.1016/j.seppur.2026.137057","DOIUrl":"10.1016/j.seppur.2026.137057","url":null,"abstract":"<div><div>Ammonium contamination poses a significant environmental concern due to its adverse impacts on aquatic ecosystems, including oxygen depletion, reproductive disorders in aquatic organisms, and the proliferation of harmful algal blooms that release toxic compounds. These effects deteriorate water quality and threaten ecosystem stability, underscoring the need for effective and selective ammonium removal strategies. In this study, copper hexacyanoferrate (CuHCF), a Prussian blue analogue with strong affinity for ammonium ions, was immobilized onto acetone-pretreated three-dimensional (3D)-printed polylactic acid (PLA) filters. Acetone pretreatment chemically etched the PLA surface, increasing surface porosity and hydrophilicity, thereby enhancing surface reactivity for subsequent functionalization and CuHCF immobilization. This surface engineering strategy enabled uniform and stable distribution of CuHCF particles on the biopolymer scaffold, resulting in improved adsorption performance and structural stability. The fabricated filter exhibited an ammonium adsorption capacity of 1.91 mg/g and maintained over 90% regeneration efficiency across five adsorption–desorption cycles. Continuous column experiments further demonstrated stable operation for up to 40 h without significant performance deterioration. Overall, this work presents a simple and scalable approach for fabricating 3D-structured adsorbents <em>via</em> acetone-assisted surface modification, offering a practical platform for selective ammonium recovery and resource-oriented water treatment applications.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"391 ","pages":"Article 137057"},"PeriodicalIF":9.0,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048748","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}

引用次数: 0

Model development and flux improvement for separating particle/macromolecule binary suspension by cross-flow microfiltration 交叉流微滤分离颗粒/大分子二元悬浮液的模型建立及通量改进

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.seppur.2026.137046

Su-En Wu , Ching-Ting Lin , Yen-Ting Chen

Seawater desalination is an essential approach to achieve a sustainable water supply amid increasing global water demand and freshwater scarcity. However, membrane fouling during pretreatment greatly impairs filtration performance and operational efficiency. Therefore, this study aims to develop a model to analyze and enhance flux performance during cross-flow microfiltration of a binary suspension containing inorganic particles and macromolecules in seawater pretreatment. The effects of cross-flow velocity and operational pressure on filtration flux, fouling resistance, cake properties, and solute rejection were examined. The results showed that cross-flow velocity exerted a stronger influence than transmembrane pressure (TMP), with higher velocities reducing cake resistance by up to 58.44% at 75 kPa owing to increased shear stress. An empirical model based on a force balance and resistance analysis was established, and semi-empirical equations were developed to predict filtration flux, cake thickness, and macromolecule rejection under various hydrodynamic conditions. Furthermore, a self-cleaning backwash strategy was evaluated, and a 12-min backwash cycle was found optimal for balancing fouling control and energy efficiency. These findings offer valuable insights into hydrodynamic behavior and fouling control, providing practical guidance for designing sustainable seawater pretreatment processes.

在全球用水需求不断增加和淡水短缺的情况下，海水淡化是实现可持续供水的重要途径。然而，预处理过程中的膜污染严重影响了过滤性能和操作效率。因此，本研究旨在建立一个模型来分析和提高海水预处理中含无机颗粒和大分子的二元悬浮液的交叉流微滤通量性能。考察了横流速度和操作压力对过滤通量、结垢阻力、滤饼性能和截留溶质的影响。结果表明，在75 kPa时，由于剪切应力的增加，横向流动速度对滤饼阻力的影响强于跨膜压力（TMP），较高的横向流动速度可使滤饼阻力降低58.44%。建立了基于力平衡和阻力分析的经验模型，并建立了半经验方程来预测不同水动力条件下的过滤通量、滤饼厚度和大分子截留。此外，对自清洁反冲洗策略进行了评估，并发现12分钟的反冲洗周期是平衡污染控制和能源效率的最佳选择。这些发现为水动力行为和污垢控制提供了有价值的见解，为设计可持续的海水预处理工艺提供了实用指导。

{"title":"Model development and flux improvement for separating particle/macromolecule binary suspension by cross-flow microfiltration","authors":"Su-En Wu , Ching-Ting Lin , Yen-Ting Chen","doi":"10.1016/j.seppur.2026.137046","DOIUrl":"10.1016/j.seppur.2026.137046","url":null,"abstract":"<div><div>Seawater desalination is an essential approach to achieve a sustainable water supply amid increasing global water demand and freshwater scarcity. However, membrane fouling during pretreatment greatly impairs filtration performance and operational efficiency. Therefore, this study aims to develop a model to analyze and enhance flux performance during cross-flow microfiltration of a binary suspension containing inorganic particles and macromolecules in seawater pretreatment. The effects of cross-flow velocity and operational pressure on filtration flux, fouling resistance, cake properties, and solute rejection were examined. The results showed that cross-flow velocity exerted a stronger influence than transmembrane pressure (TMP), with higher velocities reducing cake resistance by up to 58.44% at 75 kPa owing to increased shear stress. An empirical model based on a force balance and resistance analysis was established, and semi-empirical equations were developed to predict filtration flux, cake thickness, and macromolecule rejection under various hydrodynamic conditions. Furthermore, a self-cleaning backwash strategy was evaluated, and a 12-min backwash cycle was found optimal for balancing fouling control and energy efficiency. These findings offer valuable insights into hydrodynamic behavior and fouling control, providing practical guidance for designing sustainable seawater pretreatment processes.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"390 ","pages":"Article 137046"},"PeriodicalIF":9.0,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075608","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}

引用次数: 0

Engineering a millimeter-scale packed bed reactor with porous calcium-alginate particles for intensified continuous-flow catalytic ozonation of ATZ 设计一个毫米级的多孔海藻酸钙填充床反应器，用于强化连续流催化臭氧氧化ATZ

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.seppur.2026.136904

Yafang Zhang , Wenqi Fang , Gaoyan Shao , Yuming Tu , Chencan Du , Zhongqi Ren

The limited mass transfer efficiency at the three-phase interface remains a major challenge for the industrial application of catalytic ozonation processes. To address this kinetic limitation, this study proposes a catalytic system that combines structurally optimized Ca²⁺ cross-linked sodium alginate spheres (Ca@SA-LSR-PEG200) with a millimeter-scale packed bed reactor (mPBR). The mesoporous structure (32.61 nm) is formed through the incorporation of polyethylene glycol (PEG200) and liquid silica gel (LSR), which contributes to the mechanical stability. The integration of Ca@SA-LSR-PEG200 with the mPBR significantly improves the gas–liquid–solid contact efficiency, achieving 100% atrazine (ATZ) removal within a short residence time of 11 s. Compared to conventional bubble columns, the apparent rate constant (k = 0.81 s⁻¹) is enhanced by two to three orders of magnitude. Mechanism investigations reveal that the CaO sites and delocalized π electrons present in carbon defects facilitate the decomposition of ozone, thereby promoting the generation of reactive oxygen species (¹O₂, ·OH, ·O₂⁻), which are responsible for ATZ degradation. The system demonstrates excellent operational stability over a 100-h testing period, with an efficiency loss of less than 5%, primarily due to the protective role of the LSR framework in preventing metal leaching. This work offers valuable insights into the mass transfer limitations in catalytic ozonation and presents a scalable solution for the continuous removal of persistent organic pollutants.

在三相界面上有限的传质效率仍然是催化臭氧化工艺工业应用的主要挑战。为了解决这一动力学限制，本研究提出了一种催化系统，该系统将结构优化的Ca2+交联海藻酸钠球（Ca@SA-LSR-PEG200）与毫米级填充床反应器（mPBR）相结合。通过聚乙二醇（PEG200）和液态硅胶（LSR）的掺入，形成了32.61 nm的介孔结构，提高了材料的机械稳定性。Ca@SA-LSR-PEG200与mPBR的集成显著提高了气液固接触效率，在11 s的短停留时间内实现了100%的阿特拉津（ATZ）去除。与传统的气泡柱相比，表观速率常数（k = 0.81 s−1）提高了两到三个数量级。机理研究表明，碳缺陷中存在的CaO位点和离域π电子促进了臭氧的分解，从而促进了活性氧（1O2，·OH，·O2−）的生成，这些活性氧负责ATZ的降解。在100小时的测试期间，该系统表现出出色的运行稳定性，效率损失低于5%，这主要归功于LSR框架在防止金属浸出方面的保护作用。这项工作为催化臭氧化的传质限制提供了有价值的见解，并为持续去除持久性有机污染物提供了可扩展的解决方案。

{"title":"Engineering a millimeter-scale packed bed reactor with porous calcium-alginate particles for intensified continuous-flow catalytic ozonation of ATZ","authors":"Yafang Zhang , Wenqi Fang , Gaoyan Shao , Yuming Tu , Chencan Du , Zhongqi Ren","doi":"10.1016/j.seppur.2026.136904","DOIUrl":"10.1016/j.seppur.2026.136904","url":null,"abstract":"<div><div>The limited mass transfer efficiency at the three-phase interface remains a major challenge for the industrial application of catalytic ozonation processes. To address this kinetic limitation, this study proposes a catalytic system that combines structurally optimized Ca<sup>2+</sup> cross-linked sodium alginate spheres (Ca@SA-LSR-PEG200) with a millimeter-scale packed bed reactor (mPBR). The mesoporous structure (32.61 nm) is formed through the incorporation of polyethylene glycol (PEG200) and liquid silica gel (LSR), which contributes to the mechanical stability. The integration of Ca@SA-LSR-PEG200 with the mPBR significantly improves the gas–liquid–solid contact efficiency, achieving 100% atrazine (ATZ) removal within a short residence time of 11 s. Compared to conventional bubble columns, the apparent rate constant (<em>k</em> = 0.81 s<sup>−1</sup>) is enhanced by two to three orders of magnitude. Mechanism investigations reveal that the Ca<img>O sites and delocalized π electrons present in carbon defects facilitate the decomposition of ozone, thereby promoting the generation of reactive oxygen species (<sup>1</sup>O<sub>2</sub>, ·OH, ·O<sub>2</sub><sup>−</sup>), which are responsible for ATZ degradation. The system demonstrates excellent operational stability over a 100-h testing period, with an efficiency loss of less than 5%, primarily due to the protective role of the LSR framework in preventing metal leaching. This work offers valuable insights into the mass transfer limitations in catalytic ozonation and presents a scalable solution for the continuous removal of persistent organic pollutants.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"390 ","pages":"Article 136904"},"PeriodicalIF":9.0,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075740","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}

引用次数: 0

Rational molecular tuning of SPEEK membranes for high-performance zinc-iron flow batteries and electrodialysis 高性能锌铁液流电池和电渗析用SPEEK膜的合理分子调谐

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.seppur.2026.137041

Zhenle Gan , Xu He , Song Ge , Xuhao Wei , Wei Qian , Wu Kuang , Cuimiao Zhang , Chunli Song , Benfa Chu , Zhongbiao Zhang

The advancement of high-performance, low-cost ion exchange membranes (IEMs) is pivotal for enabling a sustainable energy future and ensuring safe water supplies. This study reports the synthesis and characterization of a sulfonated poly(ether ether ketone) (SPEEK) membrane through copolymerization with pre-sulfonated monomers and fluorene-based constituents. The synthetic strategy allows precise regulation of the sulfonation degree and improves membrane robustness. The obtained membranes exhibit an optimal combination of properties, including moderate water uptake, limited swelling, high ionic conductivity, along with excellent mechanical and thermal stability. The m-SPEEK-FDH membrane was systematically applied in two distinct technologies: Zinc‑iron redox flow batteries (AZIFB) and electrodialysis (ED). In AZIFB applications, the 0.6-SPEEK-FDH membrane demonstrates excellent performance. It achieves an energy efficiency exceeding 79.4% even at a high current density of 400 mA cm⁻². Meanwhile, it exhibits exceptional long-term cycling stability, maintaining an energy efficiency above 84.4% throughout a test of over 950 cycles that spanned 18 days at 200 mA cm⁻². The investigation demonstrates that ED with the treated 0.6-SPEEK-FDH also exhibits high desalination efficiencies (up to 97%) with low energy consumption (<4.5 kWh·kg⁻¹). The incorporation of rigid fluorene units with a tunable degree of sulfonation offers a viable approach to tailor-made CEMs, showcasing significant potential for both zinc‑iron flow batteries and electrodialysis processes.

高性能、低成本离子交换膜（IEMs）的发展对于实现可持续能源的未来和确保安全的水供应至关重要。本研究报道了通过预磺化单体和芴基组分共聚合成磺化聚醚醚酮（SPEEK）膜。该合成策略可以精确调节磺化程度，提高膜的鲁棒性。所获得的膜表现出最佳的性能组合，包括适度的吸水，有限的膨胀，高离子电导率，以及优异的机械和热稳定性。m-SPEEK-FDH膜系统地应用于两种不同的技术：锌-铁氧化还原液流电池（AZIFB）和电渗析（ED）。在AZIFB应用中，0.6-SPEEK-FDH膜表现出优异的性能。即使在400 mA cm−2的高电流密度下，其能量效率也超过79.4%。同时，它表现出优异的长期循环稳定性，在200毫安厘米−2下持续18天的超过950次循环测试中，能源效率保持在84.4%以上。研究表明，经处理的0.6-SPEEK-FDH的ED也具有高脱盐效率（高达97%）和低能耗（<4.5 kWh·kg−1）。结合具有可调磺化程度的刚性芴单元，为定制CEMs提供了一种可行的方法，展示了锌铁液流电池和电渗析工艺的巨大潜力。

{"title":"Rational molecular tuning of SPEEK membranes for high-performance zinc-iron flow batteries and electrodialysis","authors":"Zhenle Gan , Xu He , Song Ge , Xuhao Wei , Wei Qian , Wu Kuang , Cuimiao Zhang , Chunli Song , Benfa Chu , Zhongbiao Zhang","doi":"10.1016/j.seppur.2026.137041","DOIUrl":"10.1016/j.seppur.2026.137041","url":null,"abstract":"<div><div>The advancement of high-performance, low-cost ion exchange membranes (IEMs) is pivotal for enabling a sustainable energy future and ensuring safe water supplies. This study reports the synthesis and characterization of a sulfonated poly(ether ether ketone) (SPEEK) membrane through copolymerization with pre-sulfonated monomers and fluorene-based constituents. The synthetic strategy allows precise regulation of the sulfonation degree and improves membrane robustness. The obtained membranes exhibit an optimal combination of properties, including moderate water uptake, limited swelling, high ionic conductivity, along with excellent mechanical and thermal stability. The m-SPEEK-FDH membrane was systematically applied in two distinct technologies: Zinc‑iron redox flow batteries (AZIFB) and electrodialysis (ED). In AZIFB applications, the 0.6-SPEEK-FDH membrane demonstrates excellent performance. It achieves an energy efficiency exceeding 79.4% even at a high current density of 400 mA cm<sup>−2</sup>. Meanwhile, it exhibits exceptional long-term cycling stability, maintaining an energy efficiency above 84.4% throughout a test of over 950 cycles that spanned 18 days at 200 mA cm<sup>−2</sup>. The investigation demonstrates that ED with the treated 0.6-SPEEK-FDH also exhibits high desalination efficiencies (up to 97%) with low energy consumption (<4.5 kWh·kg<sup>−1</sup>). The incorporation of rigid fluorene units with a tunable degree of sulfonation offers a viable approach to tailor-made CEMs, showcasing significant potential for both zinc‑iron flow batteries and electrodialysis processes.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"390 ","pages":"Article 137041"},"PeriodicalIF":9.0,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075654","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}

引用次数: 0

Probing the fouling induced by biomolecules of a polymer microfiltration membrane using 3D cryo-FIB/SEM 利用三维冷冻fib /SEM研究生物分子对聚合物微滤膜的污染

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-01-26 DOI: 10.1016/j.seppur.2026.137045

Hélène Roberge , Philippe Moreau , Estelle Couallier , Patricia Abellan

Membrane fouling is the main technical limitation to membrane filtration processes aimed at effectively separating valuable biomolecules from microalgae solutions. Although several fouling mechanisms have been proposed, they have rarely been directly observed. In this work, we demonstrate the direct nanometer-scale visualization of fouling both inside and on the surface of membranes. To mimic the microfiltration of real bioresource extracts, model solutions of lipids, proteins, and their mixtures were filtered, and the consecutively fouled membranes were analysed and reconstructed in 3D at high resolution using cryogenic focused ion beam coupled with scanning electron microscopy (cryo-FIB/SEM). Nanometer-scale analysis using deep learning segmentation tools (random forest combined with U-net model) uncovers membrane fouling mechanisms previously hypothesized, providing insights into how filtration depends on complex mixture composition. A quantitative analysis of the pores that are fouled or blocked, and open pores that can actively contribute to filtration is established. The methodology presented in this work provides directly probed, relevant information on membrane fouling structures that are scarcely accessible by other means, with broad applications to filtration processes in both industry and biotechnology research.

膜污染是膜过滤过程的主要技术限制，膜过滤过程旨在有效地从微藻溶液中分离有价值的生物分子。虽然提出了几种结垢机制，但它们很少被直接观察到。在这项工作中，我们展示了在纳米尺度上对膜内部和表面污垢的直接可视化。为了模拟真实生物资源提取物的微过滤，我们对脂质、蛋白质及其混合物的模型溶液进行了过滤，并利用低温聚焦离子束和扫描电镜（cro - fib /SEM）在高分辨率下对连续污染的膜进行了三维分析和重建。使用深度学习分割工具（随机森林与U-net模型相结合）的纳米尺度分析揭示了之前假设的膜污染机制，为过滤如何依赖于复杂的混合物组成提供了见解。对被污染或堵塞的孔隙和能够积极促进过滤的开放孔隙进行定量分析。在这项工作中提出的方法提供了直接探测的膜污染结构的相关信息，这些信息很难通过其他方式获得，在工业和生物技术研究的过滤过程中具有广泛的应用。

{"title":"Probing the fouling induced by biomolecules of a polymer microfiltration membrane using 3D cryo-FIB/SEM","authors":"Hélène Roberge , Philippe Moreau , Estelle Couallier , Patricia Abellan","doi":"10.1016/j.seppur.2026.137045","DOIUrl":"10.1016/j.seppur.2026.137045","url":null,"abstract":"<div><div>Membrane fouling is the main technical limitation to membrane filtration processes aimed at effectively separating valuable biomolecules from microalgae solutions. Although several fouling mechanisms have been proposed, they have rarely been directly observed. In this work, we demonstrate the direct nanometer-scale visualization of fouling both inside and on the surface of membranes. To mimic the microfiltration of real bioresource extracts, model solutions of lipids, proteins, and their mixtures were filtered, and the consecutively fouled membranes were analysed and reconstructed in 3D at high resolution using cryogenic focused ion beam coupled with scanning electron microscopy (cryo-FIB/SEM). Nanometer-scale analysis using deep learning segmentation tools (random forest combined with U-net model) uncovers membrane fouling mechanisms previously hypothesized, providing insights into how filtration depends on complex mixture composition. A quantitative analysis of the pores that are fouled or blocked, and open pores that can actively contribute to filtration is established. The methodology presented in this work provides directly probed, relevant information on membrane fouling structures that are scarcely accessible by other means, with broad applications to filtration processes in both industry and biotechnology research.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"390 ","pages":"Article 137045"},"PeriodicalIF":9.0,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075435","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}

引用次数: 0