Separation and Purification Technology最新文献

{"title":"Rapid multi-criteria screening of energy-integrated distillation processes for nonideal mixtures","authors":"Momme Adami ,&nbsp;Dennis Espert ,&nbsp;Mirko Skiborowski","doi":"10.1016/j.seppur.2025.134463","DOIUrl":"10.1016/j.seppur.2025.134463","url":null,"abstract":"<div><div>Several thousand distillation columns are industrially employed for various separations, accounting for a substantial share of the industrial energy demand. In order to reduce their energy requirements various means for energy integration, such as direct heat integration, multi-effect distillation, thermal coupling, or vapor recompression can be applied. Considering these options and combinations of these, several hundred possible process configurations can be designed even for separations into three product streams, while the choice for a best option depends strongly on the specific separation task and system properties. In order to enable a reliable case-specific evaluation, which avoids simplified heuristics or simplified thermodynamics, this article presents a computationally efficient, algorithmic framework for a multi-criteria evaluation of more than 750 energy-integrated distillation sequences for multicomponent separations in three product streams. The framework employs thermodynamically sound pinch-based shortcut models that do not rely on constant relative volatility and constant molar overflow assumptions, making it applicable to nonideal and azeotropic mixtures. Based on the minimum energy duties and the respective flowsheet information, classical estimation methods for equipment sizes, operating costs, and capital investment, are employed. Several case studies demonstrate the framework’s applicability to azeotropic systems, its computational efficiency benefits that enable performing sensitivity analyses for varied process, thermodynamic, and economic scenarios.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134463"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144684491","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}

{"title":"Ligand-tailored Co-O bond strength in MOF-derived Co3O4 for boosting NO oxidation","authors":"Yibo Wang ,&nbsp;Li Zhang ,&nbsp;Xiaoke Hou ,&nbsp;Dongjin Lian ,&nbsp;Lei Chen ,&nbsp;Chi He ,&nbsp;Jinping Zhang","doi":"10.1016/j.seppur.2025.134482","DOIUrl":"10.1016/j.seppur.2025.134482","url":null,"abstract":"<div><div>Recent intensive research has established that modulating oxygen species activity in transition metal oxide (TMO) catalysts is pivotal for catalytic NO oxidation, which is regarded as a key step that governs NO<em>_x</em> abatement technologies. Despite this recognition, the fundamental relationship between metal–oxygen bond strength and the intrinsic catalytic properties of TMOs remains poorly understood. To address this gap, we fabricated dodecahedral-, rod-, and sphere-like Co₃O₄ catalysts (Co₃O₄-D, Co₃O₄-R, Co₃O₄-S) with tunable Co-O bond covalency using a MOF-templating strategy. Systematic evaluation revealed a distinct activity trend, wherein Co₃O₄-D displays the best activity, for which a maximal NO conversion (82.0 %) could be attained at 250 °C under a WHSV of 150, 000 mL·g⁻¹·h⁻¹, followed by Co₃O₄-R (75.0 % at 275 °C) and Co₃O₄-S (66.0 % at 300 °C). Mechanistic studies demonstrate that weakened Co-O bond strength enhances catalytic function through dual pathways: (1) lowering the energy barrier for oxygen vacancy formation, which accelerates surface lattice oxygen activation and improves the intrinsic redox capability; (2) preferentially exposing undercoordinated Co-O sites that serve as main active sites for NO adsorption and subsequent conversion to NO₂. This work provides a theoretical foundation for designing high-efficiency NO oxidation catalysts by leveraging MOF-templated structural and electronic regulation.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134482"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694207","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}

{"title":"Interfacial charge steering in CdS/nitrogen-deficient g-C3N4 heterojunctions boosts solar-driven persulfate activation for PPCPs decontamination","authors":"Jie Mao ,&nbsp;Jihui Wang ,&nbsp;Jun Zhang ,&nbsp;Sha Shi ,&nbsp;Yizhen Zhang ,&nbsp;Yaohui Bai ,&nbsp;Jiuhui Qu","doi":"10.1016/j.seppur.2025.134480","DOIUrl":"10.1016/j.seppur.2025.134480","url":null,"abstract":"<div><div>The persistence of pharmaceuticals and personal care products (PPCPs) in aquatic ecosystems poses severe environmental risks, primarily owing to their incomplete removal by conventional treatment methods and potential for inducing bacterial resistance. While CdS/g-C₃N₄ heterojunctions exhibit promise for photocatalytic degradation, the role of nitrogen-defect engineering in steering interfacial charge behavior to synergize photocatalysis with persulfate (PS)-based advanced oxidation remains unexplored. Herein, a nitrogen-deficient Z-scheme CdS/g-C₃N₄ (CdS/N-CN) heterojunction was designed via hydrothermal synthesis to enable solar-driven cooperative photocatalysis and PS activation for PPCPs degradation. The optimized system achieved complete degradation of 10 mg/L sulfamethoxazole (SMX) within 60 min under visible light, achieving a rate constant (0.157 min⁻¹) 29 times higher than pristine g-C₃N₄. Mechanistic investigations demonstrated dual-pathway operation: a built-in electric field drove Z-scheme charge transfer, migrating electrons from N-CN to CdS while holes in N-CN served as primary oxidants. Meanwhile, electrons from CdS activated PS to generate sulfate and hydroxyl radicals, with the latter transforming into singlet oxygen for supplementary oxidation. This synergistic photocatalysis-PS activation system maintained efficient redox activity while enhancing charge separation, ultimately enabling effective PPCPs decontamination. This research presents a novel strategy for leveraging solar-driven heterojunctions and persulfate chemistry for sustainable water remediation.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134480"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694208","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}

{"title":"Microwave-assisted synthesis of three dimensional superhydrophilicity ion imprinted polymer based on POSS/SBA-15 for copper ion adsorption in environmental water","authors":"Rongpeng Yu ,&nbsp;Liangyin Xiang ,&nbsp;Maoxiang Geng ,&nbsp;Su Ya ,&nbsp;Shakeel Zeb ,&nbsp;Zhanchao Liu ,&nbsp;Yan Liu","doi":"10.1016/j.seppur.2025.134445","DOIUrl":"10.1016/j.seppur.2025.134445","url":null,"abstract":"<div><div>The research developed a three-dimensional super-hydrophilic Cu(II)-imprinted polymer(Cu(II)-IIP) utilizing Polyhedral oligomeric silsesquioxane(POSS) and Santa Barbara Amorphous-15(SBA-15) as the matrix material, in conjunction with surface imprinting and microwave-assisted techniques. SBA-15 improved the dispersion of the three-dimensional cage-like POSS structure, thus facilitating a more uniform distribution of imprinting sites. Microwave-induced polymerization markedly decreases the reaction duration to about 60 min-one-sixth of the time needed for traditional heat-induced techniques-highlighting its good efficiency and the time-saving benefits of microwave-assisted synthesis in polymer fabrication. The Cu(II)-IIP based on<!--> <!-->POSS/SBA-15 composite achieved a maximum adsorption capacity of 163.87 mg/g within 60 min under optimal<!--> <!-->conditions (pH 5, adsorbent dosage of 0.5 g/L, and a POSS mass fraction of 52.94 %), which<!--> <!-->was almost four times greater<!--> <!-->than that of the non-ion-imprinted polymer (NIIP), which only showed an adsorption capacity of 41.99 mg/g, the result was further analyzed using Langmuir isotherms and Pseudo-second order kinetics. The Cu(II)-IIP exhibited excellent adsorption–desorption efficacy during five successive cycles, with stable repeatability measurements, signifying remarkable stability and reusability of the material. The Cu(II)-IIP demonstrates significant selectivity for Cu(II) at pH 5.0, attributed to the development of specific recognition sites that correspond to the size and coordination environment of Cu(II). Additionally, the elevated surface area and mesoporous structure of SBA-15 improve ion accessibility in both binary and multi-component systems. The synthesized Cu(II)-IIP demonstrated effective application for analyzing two distinct concentrations (25.0 and 50.0 µg/L) in Yudai River and Yangtze River water, achieving satisfactory<!--> <!-->recoveries between 97.90 % and 103.24 %. Density functional theory and frontier molecular orbital calculations indicate that the adsorption of Cu(II) in Cu(II)-IIP is primarily due to the coordination between the nitrogen atom on 4-VP and Cu(II).</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134445"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694206","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}

{"title":"Readily accessible metal-hybrid organic linker gels for high-efficient recyclable iodine capture","authors":"Xingying Wang ,&nbsp;Yuecheng Wang ,&nbsp;Yaohui Zhang ,&nbsp;Yujie Ban ,&nbsp;Hailing Guo ,&nbsp;Weishen Yang","doi":"10.1016/j.seppur.2025.134462","DOIUrl":"10.1016/j.seppur.2025.134462","url":null,"abstract":"<div><div>Efficient capture of iodine concerns nuclear waste management. Crystalline metal–organic frameworks (MOF) have been demonstrated to be useful in iodine adsorption, but remain a great challenge due to their complex synthesis conditions and poor processibility. In this study, we synthesized a novel metal-hybrid organic linker gel composed of Zr-carboxylate-tannate networks via competitive coordination-driven gelation. By virtue of supramolecular nuclei aggregation, the gels exhibited a hierarchical micro-mesoporous structure to accommodate iodine molecules. Moreover, the abundant phenolic OH groups of the tannate linker provided adsorption sites for iodine, imparting gels high binding energy with iodine. The gels demonstrated an exceptional iodine vapor adsorption capacity (311 wt%), surpassing many crystalline MOFs. The gels manifested impressively recyclable adsorption performances. The iodine capacity was retained over 95% during three consecutive adsorption–desorption cycles. Interestingly, the metal-hybrid linker coordination and gelation enabled the in-situ formation of monolithic structures, which displayed satisfactory iodine capacity. There is nearly no capacity loss compared to the powder form, indicating that gelation offers a promising in-situ adsorbent shaping manner. This study unlocks the great potential of non-crystalline, easily accessible metal–organic gels as high-performance adsorbents for radionuclide sequestration.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134462"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144684484","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}

{"title":"Sodium-ion-mediated pore size regulation in Pluronic F127-fructose-derived hydrothermal carbons for enhanced capacitive deionization performance","authors":"Haozhi Zhang,&nbsp;Jia Fang,&nbsp;Shuyue Zhang,&nbsp;Xue Song,&nbsp;Liang Wang,&nbsp;Yilei Wang","doi":"10.1016/j.seppur.2025.134363","DOIUrl":"10.1016/j.seppur.2025.134363","url":null,"abstract":"<div><div>Hierarchically porous carbons (HPCs) were synthesized using a sodium ion (Na⁺)–Pluronic F127 coordination complex as a template for application in capacitive deionization (CDI). By incorporating NaCl into the Pluronic F127–glucose aqueous solution during hydrothermal carbonization, the HPC-8/12 exhibited the largest specific surface area (267.30 m²/g) and mesopore volume (85.7 %). Compared to HPC-0/12, HPC-8/12 demonstrated a specific capacitance of 94.22F/g in a 1 M NaCl aqueous electrolyte. The HPC-8/12 was subsequently mixed with graphene oxide and processed into non-woven fabrics <em>via</em> wet-spinning. These fabrics were then thermally annealed in an inert gas at 800 ℃ to produce CDI electrodes. The resulting HPC-8/12–graphene composite fibers achieved salt adsorption capacities (SAC) of 13.34 mg/g for KCl, 18.78 mg/g for NaCl, and 12.53 mg/g for LiCl at a working voltage of 1.2 V. The Na⁺–Pluronic F127 coordination complexes completely degrade during thermal annealing, resulting in enlarged mesopore sizes that reduce ion transport resistance. Additionally, they introduce specific adsorption sites for Na⁺. This study demonstrates the potential for selectively adsorbing Na⁺ using CDI technology.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134363"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144684483","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}

{"title":"Amine modified potassium-based composite adsorbents prepared by spray granulation method for enhanced CO2 capture performance","authors":"Yueyue Gao ,&nbsp;Yiqian Yao ,&nbsp;Chuanwen Zhao ,&nbsp;Pu Huang ,&nbsp;Yafei Guo ,&nbsp;Jian Sun","doi":"10.1016/j.seppur.2025.134423","DOIUrl":"10.1016/j.seppur.2025.134423","url":null,"abstract":"<div><div>The capture of CO₂ from flue gas after combustion using solid sorbents is one of the efficient options for reducing CO₂ emissions from fossil fuel-fired power plants. To satisfy the requirement of large quantities flue gas treatment, the CO₂ capture capacities of the solid sorbents must be focused on. In this study, K₂CO₃/Al₂O₃ adsorbents were prepared via spray granulation, achieving an optimal CO₂ adsorption capacity of 1.89 mmol/g at a potassium carbonate loading of 30 wt%. To address the limitations of potassium-based adsorbents, we further enhanced the performance by incorporating polyethyleneimine (PEI), an amine-functionalized material known for its high CO₂ affinity, in the K30Al adsorbent. A series of potassium-amine composite adsorbents were synthesized with varying PEI loadings (1 wt%, 3 wt%, 5 wt%, and 7 wt%). Remarkably, a synergistic effect between K₂CO₃ and PEI was observed, with the 5 wt% PEI loading yielding the highest CO₂ adsorption capacity of 2.19 mmol/g, representing a 16 % improvement over the unmodified adsorbent. This represents a novel K30Al-P5 composite adsorbent successfully fabricated through deposition of a small amount of PEI onto pre-synthesized K30Al substrate via the spray granulation method. Comprehensive characterization, including adsorption capacity, cyclic stability, and structural properties, revealed that the enhanced performance is attributed to the optimized interaction between K₂CO₃ and PEI, which facilitates CO₂ chemisorption and diffusion. This study not only demonstrates a significant improvement in CO₂ capture efficiency but also provides a scalable and cost-effective strategy for designing high-performance adsorbents.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134423"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144684490","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}

{"title":"Construction of ceramic membranes with ultra-high gas permeance for dust-laden gas filtration at high temperatures","authors":"Huandi Yao ,&nbsp;Dong Zou ,&nbsp;Zhaoxiang Zhong ,&nbsp;Weihong Xing","doi":"10.1016/j.seppur.2025.134401","DOIUrl":"10.1016/j.seppur.2025.134401","url":null,"abstract":"<div><div>Silicon carbide (SiC) membranes hold significant promise for high-temperature gas filtration owing to their inherent physicochemical stability. However, their broader applications are often limited by the significant “trade-off” between pore size and permeance. This work proposed a one-step approach that combines the phase inversion and high-temperature sintering to fabricate high-permeance SiC membranes with asymmetric structures. Parameter optimization of the casting solution composition and sintering conditions revealed precise control over the resulting membrane microstructures. The optimized membranes achieved an average pore size of 2.88 µm and a remarkably high gas permeance of 582.30 m³·m⁻²·h⁻¹·kPa⁻¹, alongside structural integrity under repeated thermal shocks and durability under corrosion environments. During continuous filtration testing with dust-laden gas at 300 °C, the pressure drop was below 0.44 kPa over 32 h of dust removal with a retention rate of 99.99 % for ∼0.3-μm dust particles. Compared with the literature, the SiC membranes fabricated via phase inversion method in this work showed superior structural performance and offered higher gas permeance as long as lower filtration pressure drop in the filtration process. This work offers an efficient pathway for scalable production of high-permeance ceramic membranes aimed at high-temperature dust filtration applications.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134401"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685033","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}

{"title":"Highly efficient photocatalytic degradation of ofloxacin coupling with Cr(VI) reduction by m-PDI/BiOI organic–inorganic S-scheme heterojunction catalysts","authors":"Haoruo Xu ,&nbsp;Chenxi Huang ,&nbsp;Weili Yu ,&nbsp;Ningjie Fang ,&nbsp;Yinghao Chu ,&nbsp;Jinhui Li","doi":"10.1016/j.seppur.2025.134477","DOIUrl":"10.1016/j.seppur.2025.134477","url":null,"abstract":"<div><div>The combined pollution toxicity of hexavalent chromium heavy metal (Cr(VI)) and antibiotics (such as ofloxacin, OFL) is much higher than that of a single pollutant, posing a serious challenge to the ecological environment. Photocatalytic technology can achieve the removal of both single pollutants and composite pollutants. It is urgent to develop catalysts with high carrier separation efficiency and photocatalytic degradation performance. In this work, we successfully prepared m-PDI/BiOI heterojunction catalysts (mPB-3) with tight contact interfaces using the continuous ion layer adsorption and reaction method, and applied them to the synergistic removal of OFL and Cr(VI). The results showed that mPB-3 exhibited a bidirectional enhancement effect. The degradation rate of OFL reached more than 99.5 % within 40 min, the corresponding reduction efficiency of Cr(Ⅵ) reached 63.7 % at pH = 9. Furthermore, the influence of different environmental factors on the degradation process have also been clarified, indicating that mPB-3 has good stability and adaptability. The system characterization results confirmed that a S-scheme heterojunction has been formed. This can accelerate the rapid migration of electrons from m-PDI to BiOI, achieving efficient charge separation, and ultimately enhancing the photocatalytic activity. Finally, the degradation intermediate products and degradation mechanism were analyzed. This study provides a feasible solution for the design of efficient photocatalytic materials and their application in the combined pollution treatment of OFL and Cr(VI).</div></div><div><h3>Environmental implication</h3><div>Cr(VI) and OFL coexisting in water bodies pose significant ecological risks due to their enhanced combined toxicity. Traditional treatment techniques often struggle to effectively address such complex pollution systems. This study demonstrates that the m-PDI/BiOI heterojunction photocatalyst can efficiently synergistically remove both contaminants under environmentally relevant conditions (e.g., pH = 9), providing a practical strategy to mitigate composite pollution challenges. The S-scheme charge separation mechanism offers insights for designing advanced catalysts to tackle emerging multi-pollutant threats in aquatic ecosystems, supporting sustainable water treatment solutions.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"377 ","pages":"Article 134477"},"PeriodicalIF":8.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144684485","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}

{"title":"Anti-biofouling amidoxime polyacrylonitrile composite fibers modified with phosphate and guanidine for efficient and selective uranium extraction from seawater","authors":"Yunyang Gui, Qiufang Li, Xiaoli Su, Hui Ruan, Jun Wang, Yongde Yan, Yun Xue, Sheng Wu, Fuqiu Ma","doi":"10.1016/j.seppur.2025.134475","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.134475","url":null,"abstract":"With the escalating demand for nuclear energy, conventional uranium reserves are being depleted, making uranium extraction from seawater a key research area. Therefore, the development of high-performance adsorbent materials is crucial. In previous studies, polyacrylonitrile-amidoxime polyacrylonitrile fibers (PAN-PAO) were fabricated via a wet-spinning technique. Building on this foundation, a novel composite fiber adsorbent, designated PAN-PAO-OH-B-T, was synthesized through hydrothermal modification using polyhexamethylene biguanidine (PHMB) and trisodium phosphate (TSP), thereby introducing amidoxime, guanidine, and phosphate functional groups. The PAN-PAO-OH-B-T fibers exhibited synergistic uranium binding enabled by the multiple functional groups, achieving a high adsorption capacity of 1350 mg/g and an elevated selectivity coefficient of 20.6. Adsorption kinetics followed a pseudo-second-order model, and equilibrium data were well described by the Langmuir isotherm, with a theoretical maximum capacity of 2058 mg/g. In terms of reusability, the fibers retained an adsorption capacity of 1310 mg/g with a desorption rate of 91.4 % after six successive cycles. Additionally, the incorporation of guanidine functionalities enhanced antibacterial properties, with a bacterial inhibition rate exceeding 90 %, and substantially reduced algal adhesion. After 28 days of exposure to natural seawater, the PAN-PAO-OH-B-T fibers achieved a uranium uptake of 9.66 mg/g, demonstrating significant promise for practical applications in seawater uranium recovery.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"53 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694204","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}