Separation and Purification Technology最新文献_第2页

A novel pyrazolyl-pyridine N-donor ligand-based extraction system for the separation of trivalent actinides from lanthanides without lipophilic anions 一种新型的吡唑吡啶n给体萃取体系用于分离三价锕系元素和不含亲脂阴离子的镧系元素

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-03 DOI: 10.1016/j.seppur.2026.137147

Rui Li, Hang Zhou, Yiting Wang, Qiao Yu, Die Huang, Qiaoyin Huang, Songdong Ding

To address the challenges of poor lipophilicity and the reliance on synergistic extractants in pyrazolyl-pyridine N-donor ligands for separating trivalent actinides from lanthanides, four 2,6-bis(5-alkyl-1H-pyrazol-3-yl)pyridine (BPP) ligands with varying alkyl chains were designed and synthesized. An efficient extraction system was established using n-octanol/n-dodecane (50 vol%) as the diluent, requiring no synergistic extractant. Among the ligands, C8-BPP exhibits a higher extraction selectivity for Am³⁺ over trivalent lanthanide ions (Ln³⁺), with separation factors (SF_Am/Ln) ranging from 48 to 172. Slope analysis, UV–vis titration, and isothermal titration calorimetry (ITC) consistently confirmed a 2:1 ligand-to-metal complexation stoichiometry with Eu³⁺. Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses verified the tridentate coordination mode of C8-BPP. Further studies using Raman spectroscopy and conductivity measurements revealed the bidentate coordination of NO₃⁻ ions and their coordination number in the inner sphere, while time-resolved laser fluorescence spectroscopy (TRLFS) confirmed a dehydrated inner coordination environment for Eu³⁺. Based on combined extraction and complexation results, a neutral complexation-based extraction model was proposed. The corresponding stability constants and thermodynamic parameters (ΔH, ΔS, ΔG) were also determined.

为解决吡唑吡啶n给体在分离镧系元素和三价锕系元素时亲脂性差和依赖协同萃取剂的难题，设计并合成了4种不同烷基链的2,6-二（5-烷基- 1h -吡唑-3-基）吡啶（BPP）配体。以正辛醇/正十二烷（50 vol%）为稀释液，建立了一种高效的萃取体系，无需增效萃取剂。其中，C8-BPP对Am3+的萃取选择性高于三价镧系离子（Ln3+），分离因子（SFAm/Ln）在48 ~ 172之间。斜率分析、紫外-可见滴定和等温滴定量热法（ITC）一致证实了Eu3+的配体-金属络合化学计量。傅里叶变换红外（FT-IR）和x射线光电子能谱（XPS）分析证实了C8-BPP的三叉配位模式。利用拉曼光谱和电导率测量进一步研究发现，NO3−离子的双齿配位及其在内球中的配位数，而时间分辨激光荧光光谱（TRLFS）证实了Eu3+的脱水内配位环境。结合萃取和络合的结果，提出了一种基于中性络合的萃取模型。测定了相应的稳定性常数和热力学参数（ΔH， ΔS， ΔG）。

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引用次数: 0

Enhancing hydrogen sulfide removal through photoelectrochemistry with WO3 photoanodes under blue LED irradiation 蓝光LED照射下WO3光阳极光电化脱除硫化氢

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-03 DOI: 10.1016/j.seppur.2026.137138

Roberta Y.N. Reis , Alberto Rodríguez-Gómez , Caio V.S. Almeida , Lucia H. Mascaro , Manuel A. Rodrigo

Hydrogen sulfide (H₂S) is a highly toxic and corrosive gas commonly found in industrial emissions, posing serious environmental and operational risks. This work proposes an innovative photoelectrocatalytic strategy for the simultaneous degradation of gaseous H₂S and the generation of green hydrogen (H₂) under flux conditions. The system integrates gas-liquid absorption with electrochemical and photoelectrochemical oxidation, employing a WO₃ photoanode and a stainless steel cathode separated by a proton exchange membrane. The performance of the electrocatalytic and photoelectrocatalytic configurations was systematically evaluated regarding H₂S removal efficiency, hydrogen production, and energy consumption. The photoelectrocatalytic process exhibited superior activity, achieving a degradation of 8.2 mg S with a Coulombic efficiency of 3600 mg S Ah⁻¹ for H₂S oxidation and a Faradaic efficiency of 60% for H₂ evolution at an applied current density of 0.33 mA cm⁻². Illumination with a 10 W high-power blue LED significantly increased charge separation and reduced the cell potential, resulting in higher energy efficiency. Post-reaction characterization by X-ray photoelectron spectroscopy (XPS) demonstrated partial sulfur deposition on the WO₃ surface and the presence of oxidized sulfur species. Overall, the results demonstrate that photoelectrocatalysis under optimized conditions offers an efficient and sustainable route for simultaneous H₂S reduction and hydrogen generation, providing a promising dual-purpose platform for environmental remediation and renewable energy production.

硫化氢（H2S）是一种剧毒腐蚀性气体，常见于工业排放中，具有严重的环境和操作风险。这项工作提出了一种创新的光电催化策略，用于在通量条件下同时降解气态H2S和生成绿色氢（H2）。该系统将气液吸收与电化学和光电化学氧化相结合，采用WO3光阳极和由质子交换膜分离的不锈钢阴极。系统地评估了电催化和光催化构型对H2S的去除效率、产氢量和能耗。光电催化过程表现出优异的活性，在0.33 mA cm−2的电流密度下，H2S氧化的库仑效率为3600 mg S Ah−1，降解8.2 mg S，氢气析出的法拉第效率为60%。10 W高功率蓝色LED的照明显著增加了电荷分离，降低了电池电位，从而提高了能源效率。反应后的x射线光电子能谱（XPS）表征表明，WO3表面有部分硫沉积，并且存在氧化硫。综上所述，优化条件下的光电催化为同时还原H2S和制氢提供了一条高效、可持续的途径，为环境修复和可再生能源生产提供了一个有前景的双用途平台。

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引用次数: 0

Simultaneous removal of Cd (II) and benzo(a)pyrene complex pollution in a Fe1-xS@kaolinite/peroxymonosulfate system Fe1-xS@kaolinite/过氧单硫酸盐体系中同时去除Cd （II）和苯并(a)芘络合物污染

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-05 DOI: 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 Fe_1-xS/kaolinite composite (Fe_1-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-Fe_1-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 Fe_1-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.

废水中重金属和有机污染物的共存对公众健康和环境可持续性构成严重威胁。硫化铁（FeS）因其在解决此类复杂污染方面的潜力而受到广泛关注，但其存在结块和不稳定的倾向，可能导致修复效率不理想。本文研究了一种新型的Fe1-xS/高岭石复合材料（Fe1-xS@K），该复合材料是由FeS/高岭石（FeS@K）材料在酸性条件下转化而来的，通过保证优异的分散性和稳定性，可以有效地同时去除Cd（II）和苯并(a)芘（B[a]P）。值得注意的是，0.6-Fe1-xS@K/过氧单硫酸盐（PMS）体系在20 min内分别去除了96.9%的Cd2+和98.9%的B[a]P。机理分析表明，高岭石通过调节Fe1-xS的粒径，有效地减少了Fe1-xS的团聚，从而促进了PMS的活化，提高了PMS的热稳定性和化学稳定性。这显著促进了降解系统中活性氧（ROS）的生成，如SO4⋅−、⋅OH、1O2和⋅O2−，因此由于其对环境干扰的广泛抵抗，在自然水和废水处理中表现出非凡的潜力。这项工作举例说明了一种高效的硫酸盐基高级氧化工艺，用于去除水处理中的复杂污染物。

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引用次数: 0

Faceted Bi2O2CO3 with Au@Mn3O4-induced dipole resonance for efficient photocatalytic NO/clothianidin oxidation 面Bi2O2CO3与Au@Mn3O4-induced偶极共振有效光催化NO/噻虫胺氧化

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-06 DOI: 10.1016/j.seppur.2026.137173

Xiaoming Xu , Jiaying Huang , Xianhui Zhu , Bing Liu , Ziyi Huang , Yijin Jia , Yike Zhang , Cheng Sun

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.

有效的光催化空气和水的修复受到氧化还原电位和光谱响应之间的权衡的限制。本文设计了一种Au/faceted Bi2O2CO3@Mn3O4 core@shell异质结构，用于增强NO氧化和clothianidin （CLO）降解。具体来说，暴露{001}面的Bi2O2CO3的交错狭缝结构增强了光散射和表面能，促进了可见光吸收和氧化反应。值得注意的是，等离子体Au纳米粒子与Mn3O4协同作用，由于电场矢量的对称性，引起偶极子共振，放大了局部电场，拓宽了光谱响应。同时，Au介导了Mn3O4和Bi2O2CO3之间的电荷再分配，产生了一个巨大的内部电场（IEF），加速了电荷分离。因此，异质结构实现了73.2%的NO去除率，93.5%的NO3 -选择性和最小的NO2生成（28.6 ppb），以及95.6%的CLO降解，最终转化为无毒产品，超过了报道的基准。活性的增强源于Mn3O4/ au诱导偶极共振辅助的Z-scheme电荷转移，结合ief驱动的载流子分离和寿命的延长。该催化剂还表现出优异的循环稳定性，突出了其在空气和水净化方面的前景。

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引用次数: 0

Enabling ultra-low-temperature NH3-SCR with superior H2O/SO2 resistance by a sandwich-structured ERI@CoFe-MnOx@Cor monolithic catalyst 通过三明治结构ERI@CoFe-MnOx@Cor单片催化剂实现超低温NH3-SCR具有优异的耐H2O/SO2性能

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-06 DOI: 10.1016/j.seppur.2026.137174

Yuhan Li , Juntao Wang , Liwei Xu, Haixin Shan, Yemei Liu, Na Hu, Xiangshu Chen

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@Co_1.0Fe_0.6-MnO_x@Cor (where ERI stands for erionite), was successfully fabricated. This was achieved by sequentially constructing a CoFe-MnO_x 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_x 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% NO_x 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.

开发在超低温（<150 °C）下同时具有高活性和抗H2O和SO2中毒能力的NH3-SCR催化剂仍然是一个重大挑战。在这项工作中，成功制造了一种新型的三明治结构单片催化剂，表示为ERI@Co1.0Fe0.6-MnOx@Cor（其中ERI代表erionite）。这是通过浸渍-共沉淀法依次构建一个CoFe-MnOx中间催化层，并通过在堇青石载体上浸涂工艺构建一个外沸石ERI壳来实现的。优化后的催化剂在150 - 350 °C的宽温度窗口内表现出优异的NOx转化率（>95%），在150 °C时实现完全转化（100%）。更重要的是，夹层结构使催化剂具有优异的抗水和抗二氧化硫性能，即使在5 vol% H2O和/或100 ppm SO2存在的情况下，也能在150-250 °C保持90%以上的NOx转化率。这一表现明显优于所有以前报道的同行。表征结果表明，Co-Fe-Mn三元协同作用通过增加Mn4+和化学吸附氧浓度来增强氧化还原性能，而ERI沸石外壳作为保护屏障被认为是增强中强度酸位点和优异耐中毒性能的关键因素。结合其可再生稳定性，这项工作为设计用于实际低温应用的高性能单片可控硅催化剂提供了一种新的策略。

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引用次数: 0

Innovative RO-only approach for efficient urea management in ultrapure water production from municipal wastewater reuse 创新的RO-only方法在城市废水回用的超纯水生产中高效尿素管理

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-07 DOI: 10.1016/j.seppur.2026.137167

Chulmin Lee , Iiyama masamitsu

Urea is a recalcitrant, electrically neutral low-molecular-weight TOC component in municipal reclaimed water and a critical barrier for semiconductor ultrapure water (UPW) systems targeting sub-ppb TOC. This study evaluates a membrane-first, RO-only strategy as a chemical-free, “drop-in” upgrade to existing two-pass RO trains, avoiding dedicated urea-removal units (e.g., BAC, AOP, oxidation). Four commercial elements (TBW-HR, TMG(D), TM800M, and NRSP-UBT) were benchmarked at bench-scale using 4-in. modules under an equal-flux basis. Neutral-solute transport was parameterized by an apparent urea permeability, B_urea , derived from the observed urea rejection. A mobile pilot treating reclaimed municipal water then tested five two-pass configurations. The NRSP-UBT/NRSP-UBT train achieved the highest urea rejection (>93.9%) at a total operating pressure of ∼2.5 MPa, corresponding to an estimated SEC of ∼0.6 kWh/m³ under the assumed recovery and pump efficiency. A simple two-pass prediction framework using bench-derived B_urea reproduced configuration-dependent pilot trends while acknowledging expected scale effects in 8-in. multi-element vessels. The results define a robust operating envelope for RO-only urea control under high-quality reclaimed feeds (8–10 ppb baseline) and typical excursions (20–50 ppb), enabling reduced chemical use, footprint, and cost in next-generation UPW infrastructure.

尿素是一种顽固的、电中性的低分子量TOC成分，存在于城市再生水中，是半导体超纯水（UPW）系统中TOC含量低于ppb的关键屏障。本研究评估了一种膜优先、纯反渗透的策略，作为一种无化学物质的、“插入式”升级到现有的两道反渗透列车，避免了专用的尿素去除装置（如BAC、AOP、氧化）。四种商业元件（TBW-HR， TMG(D)， TM800M和NRSP-UBT）在实验规模上使用4-in进行基准测试。等通量基础下的模块。中性溶质输运是由尿素的明显渗透性Burea来参数化的，Burea是由观察到的尿素排斥所得。一个移动试点处理再生的市政水，然后测试了五种双通道配置。NRSP-UBT/NRSP-UBT系列在总操作压力为~2.5 MPa时达到了最高的尿素去除率（>93.9%），在假定的采收率和泵效率下，对应的估计SEC为~0.6 kWh/m3。一个简单的两步预测框架，使用从台架衍生的Burea，在承认8-in井的预期规模效应的同时，再现了与配置相关的试验趋势。多元化的血管。研究结果为高质量再生饲料（8-10 ppb基线）和典型偏差（20-50 ppb）下的RO-only尿素控制定义了一个强大的操作范围，从而减少了下一代UPW基础设施的化学品使用、足迹和成本。

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引用次数: 0

Effect of varying cosolvent on the properties and performance of ZIF-8 for recyclable CO2 adsorption and storage 不同助溶剂对ZIF-8吸附和储存可循环CO2性能的影响

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-04 DOI: 10.1016/j.seppur.2026.137155

Fraz Saeed Butt, Hadi Hassan, Richard T. Baker

CO₂ capture and storage is central to the global warming crisis. A range of technologies is under development, including adsorption, cryogenic separation, and sequestration, for the capture, storage, or utilization of CO₂. Among these, the use of Metal-Organic Framework nanomaterial adsorbents is promising due to their ability to efficiently separate and store CO₂. Here, ZIF-8 nanocrystals were prepared using a facile, one-pot, room temperature cosolvent-based hydrothermal route. This method significantly reduced total cosolvent and ligand consumption (from a ligand (L)/metal (M) ratio of 70 to 8), resulting in a more environmentally friendly and economically viable synthesis. ZIF-8 crystals were prepared using a range of common organic cosolvents, and systematic studies were performed to investigate the influence of cosolvent on their properties. These included crystal phase, crystallinity, molecular structure, bonding type, elemental composition, surface area, and pore volume. The cosolvent-based ZIF-8 samples exhibited excellent thermal stability in both nitrogen and air environments. They also showed impressive CO₂ adsorption capacities in adsorption isotherm (0.81 mmol g⁻¹ at 25 °C and 100 kPa for ZIF-8_Methanol) and thermogravimetric (∼2.50 wt%/0.57 mmol g⁻¹ for ZIF-8_n-hexane) experiments, with excellent recyclability. This study provides a guide for preparing suitable ZIF-8 materials for adsorption and related applications.

二氧化碳的捕获和储存是全球变暖危机的核心。一系列技术正在开发中，包括吸附、低温分离和封存，用于捕获、储存或利用二氧化碳。其中，金属-有机框架纳米材料吸附剂的使用是有前途的，因为它们能够有效地分离和储存CO₂。在这里，ZIF-8纳米晶体是通过一个简单的，一锅，室温助溶剂水热法制备的。该方法显著降低了总助溶剂和配体消耗(从配体（L)/金属(M)比为70比8），从而使合成更加环保和经济可行。采用多种常见的有机共溶剂制备了ZIF-8晶体，并系统研究了共溶剂对其性能的影响。这些指标包括晶体相、结晶度、分子结构、键合类型、元素组成、表面积和孔隙体积。以助溶剂为基础的ZIF-8样品在氮气和空气环境中均表现出优异的热稳定性。在吸附等温线实验中（ZIF-8Methanol在25°C和100 kPa下为0.81 mmol g−1）和热重实验中（zif -8n-己烷为~ 2.50 wt%/0.57 mmol g−1），它们也表现出令人印象深刻的CO2吸附能力，具有良好的可回收性。本研究为制备合适的ZIF-8吸附材料及相关应用提供了指导。

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引用次数: 0

Semi-crystalline polymer-blend TFC membranes with enhanced mechanical robustness and mitigated PTMSP aging 半结晶聚合物共混TFC膜具有增强的机械坚固性和减轻PTMSP老化

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-10 DOI: 10.1016/j.seppur.2026.137216

Na Yeong Oh , Chae Young Go , Young Jae Son , Hyoshin Kwak , Byulhana Min , Ki Chul Kim , Jong Hak Kim

Developing practical thin-film composite (TFC) membranes requires high separation performance, mechanical robustness, reproducible fabrication, and long-term operational stability. In this study, we report an all-polymeric TFC membrane that offers a practical and effective strategy for addressing these challenges through a miscible polymer-blend design. Pebax was incorporated into an amorphous, rubbery PGM copolymer synthesized from three monomers, poly(ethylene glycol) methyl ether methacrylate, glycidyl methacrylate, and amine-functional polypropylene glycol as a structural reinforcement and selectivity-enhancing component. Excellent miscibility between PGM and Pebax, together with the preserved intrinsic semi-crystalline microphase separation within Pebax, collectively enabled concurrent enhancements in mechanical robustness and separation performance. The PGM/Pebax-50 membrane (50:50 wt%) with optimized crystallinity achieved a high CO₂ permeance of 1390 GPU with a CO₂/N₂ selectivity of 43, while exhibiting a robust tensile modulus of 77.1 MPa. Notably, one-year long-term stability tests demonstrated that the PGM/Pebax-50 membrane exhibited significantly improved stability, owing to the protective barrier effect of the PGM/Pebax layer in mitigating the physical aging of the poly(trimethylsilylpropyne) (PTMSP) gutter layer. Molecular dynamics (MD) simulations and density functional theory (DFT) calculations elucidated the gas-polymer interaction energetics and diffusion transport pathways within the blend membranes, and further revealed the mechanistic origins of the mitigated physical aging of PTMSP. Collectively, these findings demonstrate a potentially scalable approach for designing durable, high-performance, all-polymeric TFC membranes suitable for industrial CO₂ capture applications.

开发实用的薄膜复合材料（TFC）膜需要高分离性能、机械稳健性、可重复性和长期运行稳定性。在这项研究中，我们报告了一种全聚合物TFC膜，通过混相聚合物共混设计为解决这些挑战提供了一种实用而有效的策略。Pebax加入到一种无定形的橡胶PGM共聚物中，该共聚物由三种单体合成，聚乙二醇甲基丙烯酸甲酯、甲基丙烯酸缩水甘油酯和胺功能聚丙烯乙二醇作为结构增强和选择性增强成分。PGM和Pebax之间良好的混溶性，以及Pebax内部保留的固有半晶微相分离，共同增强了机械稳健性和分离性能。结晶度优化后的PGM/Pebax-50膜（50:50 wt%）的CO2透过率为1390 GPU， CO2/N2选择性为43，拉伸模量为77.1 MPa。值得注意的是，为期一年的长期稳定性测试表明，PGM/Pebax-50膜的稳定性得到了显著提高，这是由于PGM/Pebax层的保护屏障作用减缓了聚三甲基硅丙炔（PTMSP）沟层的物理老化。分子动力学（MD）模拟和密度泛函理论（DFT）计算揭示了共混膜内气体-聚合物相互作用的能量学和扩散传输途径，并进一步揭示了PTMSP减缓物理老化的机理根源。总的来说，这些发现证明了一种潜在的可扩展方法，可以设计出适用于工业二氧化碳捕获应用的耐用、高性能、全聚合物TFC膜。

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引用次数: 0

Ionic liquid functionalized polymer: An effective, rapid and recyclable adsorbent for selective removal of benzophenone-type ultraviolet absorbers from water 离子液体功能化聚合物：一种有效、快速、可回收的吸附剂，用于选择性去除水中的二苯甲酮型紫外线吸收剂

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-10 DOI: 10.1016/j.seppur.2026.137117

Chen Wang , Pingning Jin , Fei Li , Xia Zhang , Jianji Wang , Jing Fan

The widespread use of benzophenone (BP)-type ultraviolet absorbers has raised growing concerns on the potential risks to both ecosystems and human health. In this study, a novel ionic liquid functionalized polymer (PS-CH₂-[BrMim][Cl]) was prepared by chemical grafting and its performance to selectively remove benzophenone-5 (BP-5) from water was studied. It was shown that PS-CH₂-[BrMim][Cl] not only exhibited an ultrahigh adsorption capacity of 834.7 mg/g for BP-5 at 3200 ppm, but also effectively enriched 85.9% of trace BP-5 (2.5 ppb) from high-salinity water, with an enrichment factor as high as 859.0. The adsorbent demonstrated rapid adsorption kinetics and 10 min was enough to achieve equilibrium. Even the content of coexisting inorganic ions such as Na⁺, K⁺, Ca²⁺, Mg²⁺, Cl⁻ and NO₃⁻ in water was 50,000 times higher than that of BP-5, the removal efficiency remained almost unaffected. Notably, PS-CH₂-[BrMim][Cl] also demonstrated good adsorption performance for benzophenone-type ultraviolet absorbers with similar structure to BP-5 and exhibited excellent recycling durability. Mechanism study indicated that the multiple interactions of hydrogen bonding, electrostatic attraction and ion exchange significantly contributed to the ultra-high adsorption of BP-5. As such, this work provides a new perspective for the removal of benzophenone-type ultraviolet absorbers from real environmental samples.

二苯甲酮（BP）型紫外线吸收剂的广泛使用引起了人们对生态系统和人类健康潜在风险的日益关注。本研究通过化学接枝法制备了一种新型离子液体功能化聚合物PS-CH2-[BrMim][Cl]，并研究了其对水中二苯甲酮-5 （BP-5）的选择性去除性能。结果表明，PS-CH2-[BrMim][Cl]在3200 ppm浓度下对BP-5具有834.7 mg/g的超高吸附能力，可有效富集高盐度水中85.9%的痕量BP-5(2.5 ppb)，富集系数高达859.0。吸附剂表现出快速的吸附动力学，10 min足以达到平衡。即使水中共存的无机离子Na+、K+、Ca2+、Mg2+、Cl−和NO3−的含量比BP-5高5万倍，其去除率几乎不受影响。值得注意的是，PS-CH2-[BrMim][Cl]对与BP-5结构相似的二苯甲酮类紫外线吸收剂也表现出良好的吸附性能，并具有良好的循环耐久性。机理研究表明，氢键、静电吸引和离子交换的多重相互作用是BP-5超高吸附的重要原因。因此，本研究为从真实环境样品中去除二苯甲酮型紫外线吸收剂提供了新的视角。

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引用次数: 0

Amine-functionalized SBA-15 molecular sieve for efficient targeted capture of NO2 and SO2 at high space velocity 氨基功能化SBA-15分子筛在高空速下高效靶向捕获NO2和SO2

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology

Pub Date : 2026-06-19 Epub Date: 2026-02-11 DOI: 10.1016/j.seppur.2026.137226

Fengyin Xiao, Guixian Yu, Youlin Liu, Yuesong Shen

Addressing large footprint and high comprehensive investment associated with current segmented treatment of SO₂ and NO_x in industrial flue gas, this study innovatively proposes an integrated technology for dynamic synergistic removal of SO₂ and NO₂, focusing on developing an amine-functionalized SBA-15 (SBA-15-nTEPA) for selectively capturing SO₂ and NO₂ from flue gas at low temperature and high gas space velocity. Results demonstrated that the SBA-15-nTEPA with a particle size of 20–40 mesh achieved complete removal of 500 ppm SO₂ and 500 ppm NO₂ by adsorption at 50–130 °C with GHSV of 150,000 h⁻¹. Notably, the SBA-15-80% TEPA at 110 °C completely removed 500 ppm SO₂ and 500 ppm NO₂ for 4 min, with NO₂ and SO₂ breakthrough adsorption capacity of 1.96 mmolg⁻¹ and 1.03 mmol/g, respectively. In situ DRIFTS analysis revealed that the SBA-15-nTEPA capturing SO₂ and NO₂ via -NH₂ and -NH groups targeted chemisorption, forming NH bonded sulfites, nitrites, and protonated amines. FT-IR, N₂ adsorption-desorption, XRD, and SEM analysis demonstrated that the hydrogen-bonding network between amine groups of TEPA and silanol groups of SBA-15 was crucial for stable amine immobilization. At optimal loading, TEPA uniformly filled the mesochannels without disrupting the 2D hexagonal ordered structure of SBA-15. The amine density increased linearly with TEPA loading, providing more chemisorption sites and significantly enhancing SO₂ and NO₂ adsorption capacity. This study provides critical material support for the synergistic control of multiple pollutants including SO₂ and NO₂ in dynamic flue gas streams.

针对目前工业烟气中SO2和NOx分段处理相关的大足迹和高综合投资问题，本研究创新地提出了一种动态协同去除SO2和NO2的集成技术，重点开发胺功能化SBA-15 (SBA-15- ntepa)，用于在低温和高气体空间速度下选择性地从烟气中捕获SO2和NO2。结果表明，粒径为20-40目的SBA-15-nTEPA在50-130℃、15万h−1的GHSV条件下，可完全去除500 ppm的SO2和500 ppm的NO2。值得注意的是，SBA-15-80% TEPA在110℃条件下对500 ppm SO2和500 ppm NO2的吸附时间为4 min，对NO2和SO2的突破吸附量分别为1.96 mmol/g和1.03 mmol/g。原位漂移分析表明，SBA-15-nTEPA通过- nh2和-NH基团捕获SO2和NO2，形成NH键合的亚硫酸盐、亚硝酸盐和质子化胺。FT-IR、N2吸附-脱附、XRD和SEM分析表明，TEPA胺基与SBA-15硅醇基之间的氢键网络对稳定的胺固定至关重要。在最佳加载条件下，TEPA在不破坏SBA-15二维六边形有序结构的情况下均匀填充介孔。随着TEPA负载的增加，胺密度呈线性增加，提供了更多的化学吸附位点，显著提高了SO2和NO2的吸附能力。该研究为动态烟气流中SO2和NO2等多种污染物的协同控制提供了关键的物质支持。

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引用次数: 0