Desalination最新文献_第6页

Enrichment of persulfate activation sites on coffee waste grounds-derived carbonaceous materials via coal fly ash incorporation for efficient degradation of diclofenac: Reaction mechanisms and toxicity assessments 通过粉煤灰掺入咖啡废渣衍生的碳质材料富集过硫酸盐活化位点以有效降解双氯芬酸：反应机制和毒性评估

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-05 DOI: 10.1016/j.desal.2025.119814

Jaegwan Shin , Changgil Son , Hojung Rho , Young Mo Kim , Kangmin Chon

The feasibility of coal fly ash (CFA) as a modification agent to reinforce peroxydisulfate (PDS) activation sites of coffee waste grounds-derived carbonaceous materials (CWCM) for the effective degradation of diclofenac (DCF) was comprehensively investigated. The degradation of DCF by PDS activation using CFA-incorporated CWCM (CFA@CWCM) was more effectively achieved than CWCM because of higher oxygen vacancy (O_V) and iron (II) contents on CFA@CWCM surfaces. Heterogeneous catalytic activation of PDS on multiple active sites (i.e., O_V, iron (II), aromatic rings, and ketones) of CFA@CWCM was primarily responsible for generating singlet oxygen and superoxide, which played the main roles in the degradation of DCF, with minor production of hydroxyl and sulfate radicals. The degradation pathways of DCF by the CFA@CWCM/PDS system were potentially hydroxylation, oxidation, dehydrogenation, and CN cleavage. Additionally, the potential risks of DCF and its degradation intermediates were moderately reduced using the CFA@CWCM/PDS system. The CFA@CWCM/PDS system demonstrated effective DCF degradation in both lake water and secondary effluent. In particular, the CFA@CWCM/PDS system maintained reuse efficiencies of up to 76.2 % for four cycles of the catalytic degradation of DCF. Therefore, CFA is a potential alternative to pure chemicals for enriching the PDS activation sites of CWCM to purify DCF-containing water.

全面研究了粉煤灰（CFA）作为改性剂增强咖啡渣碳质材料（CWCM）过硫酸氢盐（PDS）活化位点，有效降解双氯芬酸（DCF）的可行性。由于在CFA@CWCM表面具有更高的氧空位（OV）和铁（II）含量，cfa - CWCM （CFA@CWCM）通过PDS活化降解DCF比CWCM更有效。PDS在CFA@CWCM的多个活性位点（OV、铁（II）、芳环和酮）上的多相催化活化主要产生单线态氧和超氧化物，在DCF的降解中起主要作用，少量产生羟基和硫酸盐自由基。CFA@CWCM/PDS体系对DCF的降解途径为潜在的羟基化、氧化、脱氢和CN裂解。此外，使用CFA@CWCM/PDS系统可以适度降低DCF及其降解中间体的潜在风险。CFA@CWCM/PDS系统对湖水和二级出水均有较好的DCF降解效果。特别是，CFA@CWCM/PDS系统在催化降解DCF的四个循环中保持了高达76.2%的重复使用效率。因此，CFA是一种潜在的替代纯化学品来富集CWCM的PDS活化位点以净化含dcf的水。

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引用次数: 0

Multi-membrane integrated process enables efficient electrodialytic separation of alkaloids from aqueous extract of Caulis sinomenii 多膜集成工艺实现了青藤水提物生物碱的高效电析分离

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-05 DOI: 10.1016/j.desal.2025.119813

Lanlan Zhang , Xixi Ma , Tingting Xu , Shanshan Liu , Luna Chen , Jiaming Ji , Jinfeng He , Li Sun , Xiaocheng Lin , Chuanrun Li , Haiyang Yan

Direct separation of active ingredients (e.g., alkaloids) from natural product water extracts is challenging due to high organic solvent use and saline wastewater. Here, we proposed a multi-membrane integrated process for electrodialytic separation of alkaloids (sinomenine and magnoflorine as quality markers) from Caulis sinomenii aqueous extract. The acidic extract was pretreated via microfiltration-ultrafiltration-nanofiltration (MF-UF-NF) to remove large impurities and obtain NF concentrate. Then, an electrodialysis system with an ultrafiltration membrane (EDUF) was used to separate positively charged alkaloids from the concentrate. During this process, the molecular weight cut-off of UF membrane and stack voltage were optimized to 5000 Da and 30 V, respectively, to achieve high alkaloid flux, recovery rate, and low energy consumption. It was also found that a high feed concentration increases flux but decreases alkaloid recovery rate. To improve the recovery rate, continuous EDUF operation was verified as an efficient approach for the alkaloids separation, owing to its high flux (sinomenine: 3.48 g m⁻² h⁻¹; magnoflorine: 1.28 g m⁻² h⁻¹) and recovery rate (sinomenine: 84.1 %; magnoflorine: 68.2 %), along with minimal membrane fouling and significant economic advantages. This multi-membrane integrated process offers a promising strategy for efficient electrodialytic separation of alkaloids from natural product aqueous extracts.

从天然产品水提取物中直接分离活性成分（如生物碱）是具有挑战性的，因为有机溶剂的使用量高，废水含盐。以青藤碱和木兰花碱为质量标记物，建立了电析分离青藤碱生物碱的多膜集成工艺。酸性萃取液经微滤-超滤-纳滤（MF-UF-NF）预处理，去除较大杂质，得到纳滤浓缩液。然后，采用超滤膜（EDUF）电渗析系统从浓缩液中分离出带正电的生物碱。在此过程中，UF膜的分子量截止和堆叠电压分别优化为5000 Da和30 V，以实现高生物碱通量、高回收率和低能耗。较高的饲料浓度增加了通量，但降低了生物碱的回收率。为了提高生物碱的回收率，连续EDUF操作具有较高的通量（青藤碱：3.48 g m−2 h−1；木兰花碱：1.28 g m−2 h−1）和回收率（青藤碱：84.1%；木兰花碱：68.2%）、膜污染最小和显著的经济优势，被证明是一种有效的生物碱分离方法。这种多膜集成工艺为电析分离天然产物水提物中生物碱提供了一种很有前景的方法。

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引用次数: 0

Beyond global metrics in capacitive water deionization: Position-resolved ion concentration from operando X-ray transmission 超越电容性水去离子化的全局度量：operando x射线透射的位置分辨离子浓度

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-04 DOI: 10.1016/j.desal.2026.119849

Max V. Rauscher , Richard Kohns , Malina Seyffertitz , Sebastian Stock , Sylvio Haas , Volker Presser , Christian Prehal , Nicola Hüsing , Oskar Paris

The performance of novel electrode materials and the influence of cell geometry or flow rate on capacitive water deionization (CDI) are usually described by global metrics from the analysis of the effluent electrolyte together with the electrochemical response of the system. However, these approaches cannot provide information on local variations of ion concentration and related local efficiency within an operating device. Here, a novel approach of position-resolved operando synchrotron-based X-ray transmission is introduced to determine local ion concentration changes along the flow channel from the inlet (feedwater) to the outlet (effluent water) of a working CDI cell. A specific cell design allows the independent quantification of concentration changes within the bulk electrolyte in the flow channel as well as the two oppositely charged nanoporous electrodes. Results from a 15 mM CsCl feed solution using three flow rates and two carbon materials with hierarchical porosity reveal a complex spatial- and temporal ion distribution in the system. A distinct dependence of local concentration on the flow rate is observed, with generally decreasing local desalination capacity towards the outlet of the cell, particularly for slow flow rates. It is also found that a significantly better overall performance for one of the two materials can be related to dominant counter-ion adsorption within ultramicropores, which ions cannot access in their hydrated state at no applied potential (ionophobicity). Overall, the results demonstrate the unique potential of position-resolved operando X-ray techniques to get mechanistic insight into local ion redistribution in CDI systems, allowing ultimately guiding performance optimization.

新型电极材料的性能以及电池几何形状或流速对电容性水去离子（CDI）的影响通常是通过对流出电解质的分析以及系统的电化学响应的全局度量来描述的。然而，这些方法不能提供离子浓度的局部变化和操作装置内相关的局部效率的信息。本文介绍了一种基于位置分辨operando同步加速器的x射线透射新方法，以确定工作CDI电池从入口（给水）到出口（出水）的流道中局部离子浓度的变化。一种特殊的电池设计允许在流动通道内的散装电解质以及两个相反带电的纳米孔电极内的浓度变化的独立量化。采用三种流速和两种具有分层孔隙度的碳材料的15 mM CsCl进料溶液的结果揭示了系统中复杂的时空离子分布。观察到局部浓度对流速有明显的依赖性，对电池出口的局部脱盐能力一般会下降，特别是在流速较慢的情况下。研究还发现，两种材料中有一种的整体性能明显更好，这可能与超微孔内主要的反离子吸附有关，在没有施加电位（疏离子）的情况下，离子无法以水合状态进入超微孔。总的来说，结果证明了位置分辨operando x射线技术的独特潜力，可以深入了解CDI系统中局部离子再分布的机理，从而最终指导性能优化。

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引用次数: 0

Triple bionic heterogeneous spine achieves water self-transmission and collection 三重仿生异质脊柱，实现水的自我传递和收集

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-04 DOI: 10.1016/j.desal.2026.119851

Liang Jun Zheng , Min Liang Wang , Kewei Gao , Dong Hee Kang , Na Kyong Kim , Jihoon Jeong , Zhuang Min , Hyun Wook Kang

Freshwater crisis restricts social development, and collecting freshwater from fog is a promising strategy. However, simultaneously achieving efficient fog deposition and self-transport of water droplets is challenging. Here, a novel triple bionic heterogeneous spine (TBHS) for fog capture and droplet self-transport is developed, which is inspired by cactus spines, Namib beetles, and rice leaves. A series of experiments is conducted to explore the effects of spine size, outer contour, surface wettability, and groove structure on fog collection. A reasonable explanation for the experimental phenomenon is given through theoretical analysis and fluid simulations. The results show that thinner spines are beneficial to fog deposition thanks to weaker aerodynamic deflection. The Laplace force brought by the tapered structure is beneficial to the self-transport of water. Fog deposition works best on appropriately hydrophobic material surfaces. Heterogeneous wettability spines can achieve a compromise between efficient fog deposition and water droplet self-transport by introducing wettability difference forces. The introduction of grooves can improve the fog deposition efficiency and quickly form a water film layer, thereby replacing the cumbersome and unsustainable chemical treatment methods. The capillary force caused by the grooves can accelerate water transport simultaneously. Compared with the single-bionic spine, the TBHS is demonstrated to greatly increase fog collection efficiency. The fog collection efficiency of the TBHS is ∼2.80 times that of the hydrophilic spines and ∼ 2.32 times that of the hydrophobic spines. These findings will offer new insights for achieving water self-transport and collection, and could potentially be used in steam recovery or microfluidics.

淡水危机制约着社会的发展，从雾中收集淡水是一种很有前途的策略。然而，同时实现有效的雾沉积和水滴的自输运是具有挑战性的。本文以仙人掌刺、纳米布甲虫和水稻叶片为灵感，开发了一种用于雾捕获和液滴自运输的新型三重仿生异质棘（TBHS）。通过一系列实验探讨了棘条尺寸、外轮廓、表面润湿性和凹槽结构对雾收集的影响。通过理论分析和流体模拟对实验现象进行了合理的解释。结果表明，细刺有利于雾的沉积，因为细刺的气动偏转较小。锥形结构带来的拉普拉斯力有利于水的自输运。雾沉积在疏水材料表面效果最好。非均质润湿性刺可以通过引入润湿性差力来实现有效雾沉积和水滴自输运的折衷。引入沟槽可以提高雾沉积效率，快速形成水膜层，从而取代繁琐且不可持续的化学处理方法。沟槽产生的毛细力可以同时加速水的输送。与单仿生脊柱相比，TBHS的雾收集效率大大提高。TBHS的雾收集效率是亲水棘的~ 2.80倍，是疏水棘的~ 2.32倍。这些发现将为实现水的自我输送和收集提供新的见解，并可能用于蒸汽回收或微流体。

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引用次数: 0

Thermo-economic analysis and life cycle assessment of a poly-generation system based on HT-PEMFC, spray flash desalination and waste heat recovery 基于HT-PEMFC、喷雾闪蒸脱盐和余热回收的多联产系统的热经济分析和生命周期评估

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-04 DOI: 10.1016/j.desal.2026.119846

Benan Cai , Yuqi Zhao , Zaimin Guo , Ruihang Gao , Xunjian Che , Haijun Wang , Weihua Cai

This paper proposes a novel poly-generation system that integrates a high-temperature proton exchange membrane fuel cell (HT-PEMFC), spray flash desalination (SFD), heat pump (HP), externally fired gas turbine (EFGT), and organic Rankine cycle (ORC), capable of simultaneously generating power, heating, and fresh water. A comprehensive energy, exergy, economic, and environmental (4E) analysis is conducted to assess the influence of crucial operating parameters, such as current density, H₂ utilization ratio, and evaporation temperature, on system performance. Local sensitivity analysis, life cycle assessment and multi-objective optimization are conducted. The results indicate that a current density of 12,000 A/m² is optimal for maximizing the system's net electrical power. Rice husk is typically the most suitable choice for achieving optimal economic and environmental performance. Local sensitivity analysis reveals that the most sensitive parameter affecting the performance of the proposed system is the evaporation temperature in SFD. The optimal values for environmental benefit, specific fuel consumption, and net present value are 127.63

\times

10³ $/y, 0.28 kg/kWh, and $6,114,416, respectively. Life cycle analysis identifies the operational phase as the dominant contributor to emissions.

本文提出了一种新型的多联产系统，该系统集成了高温质子交换膜燃料电池（HT-PEMFC）、喷雾闪蒸脱盐（SFD）、热泵（HP）、外燃燃气轮机（EFGT）和有机朗肯循环（ORC），能够同时发电、供热和淡水。通过综合能源、火用、经济、环境（4E）分析，评估电流密度、H₂利用率、蒸发温度等关键运行参数对系统性能的影响。进行了局部灵敏度分析、生命周期评价和多目标优化。结果表明，电流密度为12,000 a /m2是最大化系统净电功率的最佳选择。稻壳通常是实现最佳经济和环境性能的最合适的选择。局部灵敏度分析表明，影响系统性能的最敏感参数是SFD中的蒸发温度。环境效益、特定燃料消耗和净现值的最佳值分别为127.63×103 $/y、0.28 kg/kWh和6,114,416美元。生命周期分析确定操作阶段是排放的主要贡献者。

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引用次数: 0

In situ growing ZIF-L particles by cross-substrate counter diffusion: Breaking the trade-off between NF permeation and Li+/Mg2+ selectivity 通过跨底物反扩散原位生长ZIF-L颗粒：打破NF渗透与Li+/Mg2+选择性之间的权衡

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-04 DOI: 10.1016/j.desal.2026.119854

Mengyao Chen , Yangxiang Huang , Yeqiang Lu , Congjie Gao , Lixin Xue

Polyamide/polyethylene (PA/PE) nanofiltration (NF) membranes based on polyethyleneimine (PEI) had demonstrated excellent Li⁺/Mg²⁺ selectivity, but showing trade-off between their permeance and Li⁺/Mg²⁺ selectivity. In this work, a novel cross-substrate counter diffusion (CSCD) method was introduced to grow and secure ZIF-L particles in the PA layers. Specifically, rather than directly contacting the PA layers containing Zn(II) cation (PA/Zn) with an aqueous solution of 2-methylimidazole (2-MIM) ligand from the top sides, 2-MIM ligand molecules were diffused across the PE substrate from the bottom sides to react with Zn(II) secured on the top sides of PA layers. Compared with the top-down method, the bottom-up approach had yield PA/ZIF-B NF membranes with higher surface roughness, larger average pore size and narrower pore size distribution. Notably, the pure water permeance of PA/ZIF-B membrane was increased by 2.6-folds to 15.1 L·m⁻²·h⁻¹·bar⁻¹ at a high Li⁺/Mg²⁺ separation factor (S_Li/Mg) of 16.5, breaking the trade-off performance upper bound between water permeance and Li⁺/Mg²⁺ separating selectivity and outperforming most of the reported TFN NF membranes.

基于聚乙烯亚胺（PEI）的聚酰胺/聚乙烯（PA/PE）纳滤（NF）膜具有优异的Li+/Mg2+选择性，但其渗透性与Li+/Mg2+选择性之间存在权衡关系。在这项工作中，引入了一种新的跨衬底反扩散（CSCD）方法来生长和保护ZIF-L颗粒在PA层中。具体来说，2-甲基咪唑（2-MIM）配体的水溶液不是从顶部直接接触含有Zn（II）阳离子（PA/Zn）的PA层，而是从底部扩散到PE底物上，与固定在PA层顶部的Zn（II）发生反应。与自顶向下方法相比，自底向上方法制备的PA/ZIF-B膜具有更高的表面粗糙度、更大的平均孔径和更窄的孔径分布。值得注意的是，PA/ZIF-B膜的纯水渗透率提高了2.6倍，达到15.1 L·m−2·h−1·bar−1，且Li+/Mg2+分离因子（SLi/Mg）为16.5，打破了水渗透率与Li+/Mg2+分离选择性之间的权衡性能上限，优于大多数报道的TFN - NF膜。

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引用次数: 0

Renewable–diesel-powered multi-element series SWRO for off-grid Sinai resorts: A multi-objective optimization for cost‑carbon minimization 用于离网西奈度假胜地的可再生柴油多单元系列SWRO：成本碳最小化的多目标优化

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-04 DOI: 10.1016/j.desal.2025.119823

Omar G. Kaoud , Muhammad H. Elbassoussi , M.A. Abido , Syed M. Zubair

Water scarcity in remote and off-grid regions necessitates sustainable and low-carbon desalination solutions. This study develops a multi-objective optimization framework for a hybrid renewable–diesel powered serial multi-element seawater reverse osmosis (SWRO) desalination system (1–4 elements in a single pressure vessel), integrating photovoltaic (PV) panels, wind turbines, batteries, and a diesel generator. The framework simultaneously minimizes the levelized cost of water (LCOW) and annual carbon emissions (ACE) using three advanced metaheuristic algorithms NSGA-II, Particle Swarm Optimization (PSO), and, for the first time in this context, the Multi-Objective Artificial Rabbit Optimizer (MO-ARO). A fuzzy decision-making approach is applied to identify the most balanced solutions along the Pareto front. The framework is validated and applied to nine representative sites in the Sinai Peninsula, Egypt, characterized by diverse solar and wind resources. Results show that four-elements RO configurations reduce LCOW by approximately 45 % (2.48–2.7 $/m³) and ACE by 50 % (27–34 Tons/year) compared with single-element designs, while also lowering PV and battery requirements by up to 50 %. Maintaining a constant diesel contribution of around 3 % provides the optimal trade-off between cost and emissions, ensuring reliable operation with minimal environmental impact. These findings highlight the potential of hybrid renewable–diesel serial multi-element SWRO systems to deliver low-carbon and economically viable desalination for off-grid communities, contributing to sustainable water–energy management.

偏远和离网地区的水资源短缺需要可持续的低碳海水淡化解决方案。本研究为可再生-柴油混合动力串联多元件海水反渗透（SWRO）海水淡化系统（1-4个元件在一个压力容器中）开发了一个多目标优化框架，该系统集成了光伏（PV）板、风力涡轮机、电池和柴油发电机。该框架同时使用三种先进的元启发式算法NSGA-II、粒子群优化（PSO）和多目标人工兔子优化器（MO-ARO）来最小化水的平准化成本（LCOW）和年碳排放（ACE）。应用模糊决策方法确定沿帕累托前沿最平衡的解决方案。该框架被验证并应用于埃及西奈半岛的九个具有代表性的地点，这些地点以多样化的太阳能和风能资源为特征。结果表明，与单元素设计相比，四元素RO配置的LCOW降低了约45%（2.48-2.7美元/立方米），ACE降低了50%（27-34吨/年），同时光伏和电池需求也降低了50%。在成本和排放之间保持3%左右的恒定柴油排放，确保在对环境影响最小的情况下可靠运行。这些发现突出了可再生柴油串联多元素SWRO混合系统的潜力，为离网社区提供低碳和经济可行的海水淡化，有助于可持续的水能管理。

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引用次数: 0

Deciphering wetting mechanisms in janus membranes via real-time impedance spectroscopy for stable oily wastewater desalination 利用实时阻抗谱技术破解双膜的润湿机理，用于稳定含油废水脱盐

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-04 DOI: 10.1016/j.desal.2025.119833

Yuxiao Tian , Yuan Liao , Yali Zhao , Jiali Wang , Lei Yao , Yu Liao , Gang Han , Shujuan Meng

The treatment of surfactant-stabilized oily wastewater poses a significant challenge to aquatic ecosystems and water reuse efforts. Thermal membrane desalination often suffers from membrane wetting and performance trade-offs when dealing with low-surface-tension effluents. In this study, a high-performance Janus membrane that exhibits exceptional anti-wetting properties has been developed. A key mechanistic insight is that membrane wetting is governed not merely by reduced surface tension, but critically by the hydrophobic-hydrophobic interactions between contaminants and the membrane. It is demonstrated that wetting requires both exposed hydrophobic segments and sufficient hydrocarbon chain length for effective engagement, explaining the distinct wetting behaviors of single-headed amphiphiles, bola-amphiphiles, and polymers. By employing real-time electrochemical impedance spectroscopy (EIS), the progression of wetting fronts is quantitatively elucidated, revealing how the membrane maintains stable states—such as light-penetration, intermediate-through, or deep wetting—under different chemical challenges without failure. The Janus membrane demonstrates superior vapor flux while maintaining salt rejection exceeding 99.9 %, attributed to its sub-nanoporous structure and synergistic mass transfer enhancement. Even under extreme surfactant concentrations (>20 mM), the membrane effectively resists wetting. Long-term evaluation using real oily wastewater over 30 days confirms unparalleled stability in both flux and rejection. The membrane's robust performance, combined with a straightforward and scalable fabrication method, offers a promising solution for the treatment of complex industrial wastewaters.

表面活性剂稳定含油废水的处理对水生生态系统和水回用工作提出了重大挑战。在处理低表面张力出水时，热膜脱盐经常受到膜润湿和性能权衡的影响。在这项研究中，开发了一种高性能的Janus膜，具有优异的抗湿性能。一个关键的机理是，膜润湿不仅受表面张力降低的影响，而且受污染物与膜之间疏水-疏水相互作用的影响。研究表明，润湿需要暴露的疏水段和足够的烃链长度才能有效地接触，这解释了单头两亲体、bola-两亲体和聚合物的不同润湿行为。通过使用实时电化学阻抗谱（EIS），定量地阐明了润湿前沿的进展，揭示了膜如何在不同的化学挑战下保持稳定状态（如光穿透，中间穿透或深度润湿）而不会失败。由于其亚纳米孔结构和协同传质增强，Janus膜表现出优异的蒸汽通量，同时保持了99.9%以上的阻盐率。即使在极端的表面活性剂浓度（20毫米）下，膜也能有效地抵抗润湿。对含油废水进行超过30天的长期评估，证实了在通量和截留方面无与伦比的稳定性。该膜的强大性能，结合直接和可扩展的制造方法，为复杂工业废水的处理提供了一个有前途的解决方案。

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引用次数: 0

Catalyzed in-situ amination of support layer for thermally stable forward osmosis membranes in industrial dyeing wastewater concentration 催化原位胺化热稳定正向渗透膜在工业印染废水浓缩中的应用

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-04 DOI: 10.1016/j.desal.2025.119841

Qin Zheng , Meng-ran Xu , Dai-feng Song , Wen-shi Liu , Hao-Ran Zuo , Ming Duan

Forward osmosis (FO) offers a promising wastewater treatment option with energy efficiency and lower membrane fouling than pressure-driven processes. However, its practical application remains constrained by operational temperature limitations, particularly in high-temperature industrial dyeing wastewater treatment. Inspired by the muscle that effectively controls the movement of seashells, this study employs a homogeneous catalyst to rapidly modify polyacrylonitrile support layers using bridging molecules that mimic such structures. During interfacial polymerization, one end of the molecular bridge is covalently anchored to the support layer and the other to the active layer, thereby enhancing interfacial adhesion and yielding a thermally stable FO membrane. After anchoring, the glass transition temperature (T_g) of the polyamide active layer on the modified support increases to 90.08 °C. Utilizing 1 mol/L NaCl as the draw solution and deionized water (DI) as the feed solution, the J_w of the FO membrane increased from 33.6 ± 3.9 (L∙m⁻²∙h⁻¹) at 25 °C to 110.3 ± 9.98 (L∙m⁻²∙h⁻¹) at 90 °C under AL-DS mode. The reverse salt flux ratio (J_s/J_w) remained nearly constant at 0.26 (g∙L⁻¹). In addition, the FO membranes also exhibit superior anti-fouling properties. In a 48 h concentration experiment using actual industrial dyeing wastewater, the membranes sustained a stable J_w of 20.0 ± 0.92 (L∙m⁻²∙h⁻¹). Not only 83 % of the industrial dyeing wastewater was recovered, but also the contaminants in the wastewater were forced to aggregate by external concentration polarization. This study proves FO membrane feasibility in harsh industries and presents a scalable route to high-performance membranes for high-temperature wastewater.

正向渗透（FO）提供了一种有前途的污水处理选择，与压力驱动工艺相比，它具有能源效率和更低的膜污染。然而，它的实际应用仍然受到操作温度的限制，特别是在高温工业印染废水处理中。受到有效控制贝壳运动的肌肉的启发，这项研究采用了一种均相催化剂，利用模拟这种结构的桥接分子来快速修饰聚丙烯腈支撑层。在界面聚合过程中，分子桥的一端共价锚定在支撑层上，另一端共价锚定在活性层上，从而增强了界面粘附性并产生热稳定的FO膜。锚固后，改性支架上聚酰胺活性层的玻璃化转变温度（Tg）升高至90.08℃。以1 mol/L NaCl为提取液，去离子水（DI）为进料液，AL-DS模式下，FO膜的Jw从25℃时的33.6±3.9 （L∙m−2∙h−1）增加到90℃时的110.3±9.98 （L∙m−2∙h−1）。反盐通量比（Js/Jw）基本保持在0.26 （g∙L−1）。此外，FO膜还表现出优异的抗污染性能。在实际工业印染废水的48 h浓度实验中，膜的Jw稳定为20.0±0.92 （L∙m−2∙h−1）。该方法不仅回收了83%的工业印染废水，而且通过外部浓缩极化使废水中的污染物发生聚集。该研究证明了FO膜在恶劣工业中的可行性，并为高温废水的高性能膜提供了可扩展的途径。

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引用次数: 0

Heteroepitaxial growth of DDR zeolite membranes for pervaporation dehydration of hypersaline LiBr solutions 高盐溴化锂溶液渗透蒸发脱水用DDR沸石膜的异质外延生长

IF 9.8 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2026-01-04 DOI: 10.1016/j.desal.2026.119853

Zilin Pan, Feng Ye, Shuanshi Fan, Yanhong Wang, Xuemei Lang, Lisha Lu, Gang Li

LiBr-H₂O absorption chillers offer significant advantages in cooling applications; however, their widespread implementation has been severely limited by their large weight and size. The miniaturization of their key components is therefore critical to expanding their practical applications. This study presents a novel desorber design that employs a pervaporation process to concentrate LiBr solutions using DDR zeolite membranes. High-quality DDR zeolite membranes were fabricated via a heteroepitaxial growth process, utilizing CHA rather than DDR zeolite seeds, owing to the successful suppression of the SGT competitive phase during membrane synthesis. The resulting DDR zeolite membrane exhibited a water flux ranging from 0.16 to 1.56 kg·m⁻²·h⁻¹ and a LiBr rejection exceeding 99.9 % for 20–60 wt% LiBr solutions at temperatures of 20–80 °C. The activation energy for water permeation decreased from 20.64 to 9.69 kJ·mol⁻¹ as the LiBr concentration increased from 20 to 60 wt%, which stemmed primarily from the combined effect of the thermodynamic properties of LiBr solutions and the adsorption behaviors of the membrane. Moreover, the DDR zeolite membrane demonstrated excellent stability in the pervaporation dehydration of LiBr solutions, even at 80 °C, highlighting its potential for use in desorbers for LiBr-H₂O absorption chillers.

lib - h₂O吸收式制冷机在冷却应用中具有显着优势；然而，由于它们的重量和尺寸大，它们的广泛实施受到严重限制。因此，其关键部件的小型化对于扩大其实际应用至关重要。本研究提出了一种新颖的解吸器设计，采用渗透蒸发工艺，利用DDR沸石膜浓缩LiBr溶液。利用CHA而不是DDR沸石种子，通过异质外延生长工艺制备了高质量的DDR沸石膜，这是因为在膜合成过程中成功抑制了SGT竞争相。所得的DDR沸石膜的水通量为0.16 ~ 1.56 kg·m−2·h−1，在20 ~ 80℃的温度下，对20 ~ 60 wt%的LiBr溶液的LiBr去除率超过99.9%。当LiBr浓度从20%增加到60%时，水渗透活化能从20.64降低到9.69 kJ·mol−1，这主要是由于LiBr溶液的热力学性质和膜的吸附行为的共同作用。此外，DDR沸石膜在LiBr溶液的渗透蒸发脱水中表现出优异的稳定性，即使在80°C下也是如此，这突出了它在LiBr- h₂O吸收式冷却器解吸器中的应用潜力。

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引用次数: 0