Separation and Purification Technology最新文献

{"title":"Membrane-based natural gas dehydration: Techno-economic analysis of membrane process designs with different potential application scenarios","authors":"Siding Chen, Luxuan Zeng, Qing Li, Zhongde Dai, Zhe Zhang, Shouliang Yi","doi":"10.1016/j.seppur.2025.134564","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.134564","url":null,"abstract":"Membrane-based natural gas dehydration presents a promising alternative to conventional glycol dehydrators, but its widespread industrial implementation is limited by significant methane loss and high operating costs. This study aims to simultaneously reduce methane loss and operating costs through optimizing membrane-based dehydration processes. Seven distinct membrane process designs, comprising three with recycle streams and four without, were developed and evaluated using the Symmetry process simulator. Various factors, including external N₂ availability, methane loss, energy efficiency, and project-specific requirements, were systematically analyzed. Parameters, including water vapor permeance, H₂O/CH₄ selectivity, pressure ratios, and sweep ratios, were comprehensively investigated. It was found that the pressure ratio is the primary constraint in natural gas dehydration engineering applications, making its optimization crucial for maximizing separation performance. In single-stage membrane process designs, both vacuum-based and N₂ sweep designs offer advantages in reducing membrane area requirements and minimizing methane loss. However, issues related to vacuum leaks or N₂ sourcing may arise, making these designs particularly suitable for space-constrained scenarios where some methane loss is acceptable, such as offshore or subsea applications. Among the integrated membrane process designs, the vacuum-based design with recycle streams demonstrates lower gas processing costs over a 20-year economic evaluation period. Therefore, prioritizing the integrated vacuum-based design for industrial-scale applications is recommended, provided the required vacuum specifications are met. Multistage membrane process designs were also evaluated; despite their theoretical advantages, they introduce unnecessary complexity and higher energy consumption in natural gas dehydration. Since most water vapor is removed in the first stage, multistage systems provide minimal additional benefits. A simple gas–liquid separation system can further enhance methane recovery without requiring additional membrane stages. Ultimately, this research provides valuable insights into enhancing natural gas dehydration technology, with the goal of increasing cost-effectiveness and improving environmental sustainability.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"25 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144748022","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":"Supercritical CO2-assisted regulation of FeOOH hydrophilicity for FeIV=O deployment in aqueous waste disintegration","authors":"Minsung Kim, Sang Hoon Kim, Jongsik Kim","doi":"10.1016/j.seppur.2025.134563","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.134563","url":null,"abstract":"FeOCl and FeOOH are <em>iso</em>-structural and impart defective [Fe³⁺(O^2–)₄(Cl^-)₂]^7- and [Fe³⁺(O^2–)₄(OH^–)₂]^7- sub-units on their surfaces, respectively, where Fe^δ+ and Fe³⁺ defects can evolve ^•OH/Fe^IV=O and ^•OOH/O₂^•-/¹O₂ in H₂O₂-containing aqueous media, respectively. FeOCl surface can incur marked Fe^δ+/3+ leaching or rigid coordination to aqueous organics, thereby limiting its use as a reactive oxygen species (ROS) evolver and/or reservoir in aqueous phases. Conversely, FeOOH surface can avoid Fe^δ+/3+ leaching by eliminating OH^– ligands or their protonated analogs (H₂O/H₃O⁺) from Fe^δ+/3+ in defective [Fe³⁺(O^2–)₄(OH^–)₂]^7- sub-units. This was enabled by extensive exposure of FeOOH to supercritical CO₂, producing hydrophobic FeOOH-CO₂ that offered bunched merits over hydrophilic FeOOH. The number of Fe^δ+ defects and their electron affinity were greater and lower, respectively, in FeOOH-CO₂ than in FeOOH, resulting in higher ^•OH productivity for the former and higher ¹O₂ productivity for the latter, alongside with Fe^IV=O evolution for FeOOH-CO₂. Moreover, FeOOH and FeOOH-CO₂ exploited ^•OH/¹O₂ and Fe^IV=O as their primary ROS for disintegrating aqueous organics, respectively, whose inclusion of e^--donating groups made Fe^IV=O particularly effective in initiating or propagating the destabilization of hard-to-dissociate organics via electron transfer. Furthermore, despite minimized Fe^δ+/3+ leaching across FeOOH/FeOOH-CO₂ surfaces, FeOOH-CO₂ outcompeted FeOOH in providing higher H₂O₂/^•OOH/O₂^•- accessibility to Fe^δ+/3+ defects and in avoiding their coordination to fragmented organics in H₂O₂– and organic-containing aqueous media. Consequently, FeOOH-CO₂ was more active in, selective to, and reusable for degrading e^--donating group-bearing contaminant or mineralizing textile wastewater than FeOOH, Fe₂O₃/Fe₃O₄, and FeOCl.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"1 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144748025","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":"Development and application of polymer inclusion beads (PIBs) for the recovery of Zn(II) from simulated industrial waste electroplating solutions","authors":"Leda A. Hidalgo, Charles F. Croft, Edward A. Nagul, M. Inês G.S. Almeida, Lyuben Mihaylov, Tony G. Spassov, Spas D. Kolev","doi":"10.1016/j.seppur.2025.134581","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.134581","url":null,"abstract":"The recovery of Zn(II) from industrial wastewaters is advantageous by reducing the metal discharges into the environment and promoting resource recycling. The present study reports a promising approach for recovering Zn(II) from acidic wastewater (e.g., electroplating waste solutions) using polymer inclusion beads (PIBs) larger than 500 µm in diameter which makes them suitable for industrial applications. Uniform spherical PIBs with a smooth surface and an average diameter ± 0.14 SD of 620 ± 5 µm which contained 30:70 mass ratio of poly(vinyl chloride) (PVC) and di-(2-ethylhexyl)phosphoric acid (D2EHPA) were fabricated using a microfluidic method, optimised in the present study. These PIBs extracted readily Zn(II) from feed solutions, at pH 3.0 which was completely back-extracted into 1.0 M HCl or 1.0 M H₂SO₄ receiving solutions. The PIBs were reusable for at least seven complete extraction/back-extraction cycles and exhibited high selectivity for Zn(II) over Cu(II) and Ni(II) when applied to the separation of Zn(II) from simulated waste electroplating solutions thus indicating their suitability for practical applications. The PIBs were also characterised by optical and scanning electron microscopy and thermogravimetric analysis.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"3 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747943","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":"Deep eutectic solvent for green recycling of spent lithium-ion batteries: A review of progress and challenges","authors":"Yunhui Hua, Grzegorz Lisak, Zuotai Zhang","doi":"10.1016/j.seppur.2025.134576","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.134576","url":null,"abstract":"The environmentally friendly and energy-efficient recycling of spent lithium-ion batteries (LIBs) is of paramount importance for ensuring sustainable resource supply in battery production. Deep eutectic solvents (DESs) have emerged as a promising alternative for recycling spent LIBs because of their unique properties and environmental advantages over conventional pyrometallurgical or hydrometallurgical processes. Given the rapid growth of research in this area, a timely review of DES-based recycling approaches for spent LIBs is essential. This study provides a comprehensive review of DES properties and their application in recycling spent LIBs, with a focus on their roles in pretreatment, high-value metal recovery, and cathode active material regeneration. Special emphasis is placed on elucidating the reaction mechanisms of DESs in these processes. The key parameters influencing recycling efficiencies are also outlined. Furthermore, the advantages, challenges, and future research directions of DES-based recycling are critically discussed. This work not only advances fundamental understanding but also offers valuable insights for commercial applications, providing a unique perspective for advancing sustainable battery recycling.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"716 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144748023","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":"Development of a robust large scale downstream processing of lentiviral vectors using tangential flow filtration","authors":"Sara Cardoso ,&nbsp;Silvana Krueger ,&nbsp;Jana Engelhardt ,&nbsp;Alexander Tappe","doi":"10.1016/j.seppur.2025.134568","DOIUrl":"10.1016/j.seppur.2025.134568","url":null,"abstract":"<div><div>The need for effective downstream processing of lentiviral vectors (LVs) is becoming increasingly important to improve patient access to cell and gene therapies. Efficient, robust, and scalable ultrafiltration and diafiltration (UF|DF) steps are critical for producing high-quality LVs, with tangential flow filtration (TFF) processes playing a fundamental role in concentrating viral particles, removing impurities, and exchanging buffers while preserving biological activity. Several key factors must be addressed during a TFF step development, including membrane chemistry, pore size, and structural configuration. These factors should be investigated and optimized based on critical process parameters such as recirculation rates, transmembrane pressure (TMP), and processing times.</div><div>This study outlines a process development strategy for establishing an efficient TFF step for LVs processing using Hydrosart® TFF cassettes. The Ambr® Crossflow system was initially employed for high-throughput, automated screening of two different pore sizes and crossflow conditions to assess the ability to retain infective particles, highlighting the importance of acquiring product and process insights in the early stages of development. The UF|DF process was subsequently transferred to the Sartoflow® Smart system, where two cassette configurations with different flow channel geometries, “ECO” (ECO-Screen) and “E” (E-Screen), were evaluated in both 100 kDa and 300 kDa pore sizes, for their effectiveness in processing LVs from harvested clarified feeds. At this stage, optimal operating conditions, including TMP and recirculation rates, were fine-tuned and compared before testing the robustness to feed variations, and further scalability of the selected cassette on the Sartoflow® Advanced system. In general, Hydrosart® TFF cassettes enabled rapid processing while maintaining excellent lentiviral vector recovery and reasonable impurity removal rates. High reproducibility was achieved across trials and predictable performance at larger scale was obtained, underscoring the suitability of Hydrosart® flat-sheet cassettes in LVs production processes.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"378 ","pages":"Article 134568"},"PeriodicalIF":9.0,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144748021","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":"Development of cation-exchange membranes using solvent-free 3D printing: Towards tailored surface topographies","authors":"Mekhna Venu, Claudia F. Galinha, João G. Crespo, Sylwin Pawlowski","doi":"10.1016/j.seppur.2025.134567","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.134567","url":null,"abstract":"Electromembrane processes are employed in critical applications such as desalination, lithium recovery, and salinity gradient energy conversion. However, issues like fouling and concentration polarisation may limit their effectiveness. Profiled ion-exchange membranes offer several advantages over flat membranes, including improved fluid mixing, enhanced mass transfer, lower pressure drop (thus, lower energy consumption), and elimination of the spacer’s shadow effect. Nonetheless, their preparation is considerably more complex than that of flat membranes. In this study, we pioneered the use of solvent-free fused deposition modelling (FDM) 3D printing to fabricate flat and profiled (chevron and stripe) cation-exchange membranes (CEMs). The functionalisation of the 3D-printed membranes into CEMs was achieved via sulfonation. The optimised electrical resistance and permselectivity of the prepared membranes were 10.7 ± 4 Ωcm² and 97.3 ± 4 %, respectively, after 14 h of sulfonation, closely matching commercial alternatives (e.g., FUMASEP FKB-PK-130, 9.7 ± 3 Ωcm² and 96.7 ± 1 %). Sulfonation durations exceeding 14 h increased the membranes’ electrical resistance due to the formation of sulfone cross-bridges that do not participate in cations’ exchange. Since FDM 3D printing is a solvent-free and additive manufacturing method, it significantly reduces waste during membrane fabrication, resulting in an E-factor value of 1.5. Therefore, this work opens a path toward customisable, scalable, and greener CEM production for electrochemical applications ranging from the recovery of critical raw materials and water desalination to renewable energy conversion.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"92 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144748024","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":"Understanding the role of solvents and additives on the crystal morphology of 2,6-bis(picrylamino)-3,5-dinitropyridine","authors":"Hao Wu ,&nbsp;Rongbin Cai ,&nbsp;Xiaochen Bu ,&nbsp;Yiying Zhang ,&nbsp;Hongxun Hao ,&nbsp;Lianjie Zhai ,&nbsp;Bozhou Wang","doi":"10.1016/j.seppur.2025.134578","DOIUrl":"10.1016/j.seppur.2025.134578","url":null,"abstract":"<div><div>Crystal morphology regulation is of great practical relevance for enhancing explosive performance. In this work, we investigate the effect of solvents and additives on the crystal morphology of 2,6-bis(picrylamino)-3,5-dinitropyridine (PYX) with both experiments and molecular simulation methods. Cooling crystallization in DMSO and DMF systems dramatically altered PYX morphology from needle-like to block-shaped crystals and exhibiting an approximately 7-fold decrease in aspect ratio. Meanwhile, anti-solvent crystallization in DMSO-alcohol systems (methanol/<em>n</em>-propanol) produced plate-like crystals, which demonstrates the strong solvent-dependent growth behavior of PYX. Notably, the addition of 1 % w/w PEG 4000 in DMA system also modified PYX morphology to plate-like crystals, reducing the aspect ratio from 9.9 to 1.9 while narrowing the particle size distribution. The modified attachment energy (MAE) model was calculated by the molecular dynamics (MD) simulation to explain the overall effect of solvents and additives on the predicted crystal habit. The results indicate that the effects of solvents and polymer additives on the crystal habit are a result of their absorption and interactions with the slow growing (1 1 0) and (1 1 1) faces.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"378 ","pages":"Article 134578"},"PeriodicalIF":9.0,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747974","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":"Synergistically modulating the d-band center of Ni3Se2 via Ce and Fe co-doping for efficient degradation of florfenicol in heterogeneous electro-Fenton process","authors":"Chunhui Yu,&nbsp;Xinyang Sun,&nbsp;Fan Yang,&nbsp;Chenlin Wang,&nbsp;Li Li,&nbsp;Junpu An,&nbsp;Kexin Wei,&nbsp;Yang Sun,&nbsp;Ruonig Bao,&nbsp;Kuobo Wang,&nbsp;Yongfeng Li","doi":"10.1016/j.seppur.2025.134560","DOIUrl":"10.1016/j.seppur.2025.134560","url":null,"abstract":"<div><div>Developing cathode materials with efficient hydrogen peroxide (H₂O₂) generation and activation functions is a key challenge for improving the degradation efficiency of heterogeneous electro-Fenton (Hetero-EF). In this study, Ce and Fe co-doped nickel selenide (Ce, Fe-Ni₃Se₂@NF) was successfully fabricated on nickel foam via electro-deposition. At pH 3, Ce, Fe-Ni₃Se₂@NF completely realizes the complete degradation of 30 mg/L florfenicol within 30 min at 15 mA/cm², and the reaction rate constant (0.148 min⁻¹) is 6.4 times higher than that of Ni₃Se₂@NF. Compared to Ni₃Se₂@NF, the two-electron oxygen reduction reaction (2e^-ORR) selectivity of Ce, Fe-Ni₃Se₂@NF increased from 44 %-51 % to 70 %-80 %, and degradation experiments under nitrogen demonstrated superior H₂O₂ activation. This improvement is attributed to the synergistic effect of bimetallic doping, which optimizes the crystal structure and electronic distribution of Ni₃Se₂. Theoretical calculations show that interactions between Ce 3d, Fe 3d, and Ni 3d orbitals modulate the d-band center of Ni₃Se₂, optimizing *OOH adsorption energy and enhancing 2e^-ORR activity and selectivity. Moreover, the presence of Ni²⁺/Ni³⁺, Ce³⁺/Ce⁴⁺, and Fe²⁺/Fe³⁺ redox electron pairs accelerate the interface charge transfer, facilitating the continuous activation of H₂O₂. This study clarifies the regulation mechanism of bimetallic doping, providing new material design ideas and theoretical guidance for the development of efficient Hetero-EF catalytic systems.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"378 ","pages":"Article 134560"},"PeriodicalIF":9.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144737461","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":"Removal of lead by membrane photo-electrolysis","authors":"A. Khiter, O. Arous, N. Nasrallah, N. Abdellaoui, D. Meziani, M. Trari, P. Loulergue, A. Szymczyk","doi":"10.1016/j.seppur.2025.134565","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.134565","url":null,"abstract":"This study paves the way for the development of electromembrane processes powered by renewable energies. Ion-exchange membranes were first elaborated from a mixture of poly(methyl methacrylate) and polyelectrolyte (polyaniline or polyanetholsulfonic acid), using dioctyl phthalate as plasticizer. <em>n</em>-BaFeO_3-x and <em>p</em>-CuO semiconductors were synthesized and processed into electrodes that could be polarized using visible light. A membrane photo-electrolysis cell was then developed by associating the ion-exchange membranes with the <em>n-</em>BaFeO_3-x and <em>p-</em>CuO photo-electrodes. The electric field generated between the illuminated photo-electrodes allowed transfer of metal cations through the cation-exchange membrane and their photo-reduction onto the <em>p-</em>CuO photo-cathode. The process efficiency was demonstrated by treating a 100-ppm lead solution. Promising results were obtained with 71 % Pb²⁺ ions photo-reduced using sunlight as illumination source and 80 % removal was achieved when using a 20 mW.cm⁻² LED as artificial light source.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"14 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144748026","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":"Hollow silica-titania coupled CdS heterojunction for boosting photocatalytic extraction of U(VI)","authors":"Zhuo Chen ,&nbsp;Xiaoyan Zheng ,&nbsp;Yue Wu ,&nbsp;Yating Peng ,&nbsp;Qingling Guan ,&nbsp;Yun Liao ,&nbsp;Fang Wang ,&nbsp;Liangshu Xia","doi":"10.1016/j.seppur.2025.134561","DOIUrl":"10.1016/j.seppur.2025.134561","url":null,"abstract":"<div><div>Solar-driven photocatalysis is a green and promising technology for extracting U(VI) from seawater. To address the limitations of TiO₂-based materials, including poor visible-light utilization and rapid charge recombination, a hollow-structured silica-titania coupled CdS photocatalyst (2-DT-C) was fabricated. The incorporation of dendritic fibrous nanosilica significantly enhanced the specific surface area, thereby supplying numerous accessible active sites for U(VI) photoreduction. The constructed Z-scheme heterojunction extended the light absorption edge to 600 nm while simultaneously promoting charge separation through optimized band alignment. 2-DT-C exhibited outstanding photocatalytic performance under ambient conditions without sacrificial reagents, attaining U(VI) removal rate (98.3 %) within 30 min under visible-light illumination, with an extraction capacity up to 830 mg g⁻¹. Remarkably, the photocatalytic rate constant reached 0.1930 min⁻¹, indicating 128.7-fold improvement over pristine TiO₂. Furthermore, the photocatalyst demonstrated outstanding recyclability and anti-interference capability. Combined spectroscopic analyses, the mechanism of photocatalytic U(VI) reduction was proposed. In the combined action of photogenerated electrons and ·O₂⁻, the captured U(VI) was reduced to U(IV), and ultimately formed studtite solid. The study proposes a novel strategy for designing porous TiO₂-based photocatalysts for U(VI) extraction.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"378 ","pages":"Article 134561"},"PeriodicalIF":9.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144748051","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}