Water Research最新文献

{"title":"Far UVC photolysis of PDS and H2O2 in saline water generates disinfection By-products","authors":"Jingmeng Guan ,&nbsp;Huang Huang ,&nbsp;Wenhai Chu ,&nbsp;Xin Yang","doi":"10.1016/j.watres.2025.123866","DOIUrl":"10.1016/j.watres.2025.123866","url":null,"abstract":"<div><div>Far-UVC-driven (222 nm) advanced oxidation processes (UV₂₂₂/AOPs) have gained increasing attentions for water decontamination owing to their high yields of reactive species and rapid degradation rate constants of emerging contaminants. However, the formation of toxic disinfection by-products (DBPs) during UV₂₂₂/AOP treatments of saline water remains unexplored. In this study, we demonstrated that DBPs generated in UV₂₂₂/PDS and UV₂₂₂/H₂O₂ treatment of saline water with the presence of 0.5 M Cl^⁻ was 3.55–4.50 and 1.47–1.61 times higher, respectively, compared to those generated in UV₂₅₄/PDS and UV₂₅₄/H₂O₂. Adsorbable organic halogen (AOX) generated in UV₂₂₂/AOPs was also higher than UV₂₅₄/AOPs. Notably, DBPs and AOX generated from Suwannee River fulvic acid (SRFA) in UV₂₂₂/PDS treatment were 32.33 times and 6.14 times higher than in UV₂₂₂/H₂O₂, primarily due to the elevated concentration of reactive halogen species and the accumulation of hypochlorous acid/ hypohalite. Moreover, the presence of Br⁻ in saline water led to the conversion of chlorinated DBPs into brominated DBPs in both UV₂₂₂/PDS and UV₂₂₂/H₂O₂, significantly increasing the overall toxicity associated with DBPs. Increasing the pH from 5.0 to 9.0 was found to reduce DBP-associated toxicity. This study highlights the formation of toxic DBPs in UV₂₂₂/AOPs and provides theoretical foundation for the selection and regulation of UV₂₂₂/AOPs from the perspective of DBP control.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123866"},"PeriodicalIF":11.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144097282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the role of sulfate-reducing bacteria in arsenic methylation in alluvial-lacustrine aquifers","authors":"Xiaofang Yuan ,&nbsp;Yamin Deng ,&nbsp;Jie Gao ,&nbsp;Tianliang Zheng ,&nbsp;Yuxiao Xu ,&nbsp;Yanxin Wang","doi":"10.1016/j.watres.2025.123864","DOIUrl":"10.1016/j.watres.2025.123864","url":null,"abstract":"<div><div>Arsenic (As) methylation is a crucial process within the geochemical cycle of arsenic in groundwater systems. The transformation of inorganic arsenic into less toxic monomethylarsenate (MMA) and demethylarsenate (DMA) holds the potential to partially mitigate the environmental risk of arsenic, thereby offering a promising strategy for regulating arsenic contamination in groundwater. Sulfate-reducing bacteria (SRB) have demonstrated the ability for As methylation under various environmental conditions. However, the capacity of SRB to methylate As specially in groundwater remains unverified. In this study, the predominant biogeochemical processes contribute to the enrichment of methylated arsenic (MeAs) in alluvial-lacustrine aquifers have been investigated through a combination of hydrogeochemical monitoring and incubation experiments. Field investigations in the Jianghan Plain demonstrated that MeAs concentrations in groundwater ranged from 0.34 to 444 μg/L, which are significantly higher than those reported in other region globally. The results suggested that a strongly reducing and neutral environment with elevated level of As(III) and dissolved organic carbon (DOC) facilitated the accumulation of MeAs in groundwaters. Sulfate reduction emerged as an important promoter of As methylation in groundwater, with <em>Desulfovibrio</em> potentially identified as the key SRB genus through high-throughput sequencing of <em>dsrB</em> gene. Moreover, the incubation experiments showed the As methylation efficiency was up to 22.8 % with As(III) being a critical substrate in the aquifer systems from the Jianghan Plain, while such a lower efficiency compared with paddy soil environments likely attributable to the limited available organic matter and the distinct microbial communities. This study provides novel insights on As methylation mechanisms and theoretical support for in-situ remediation of As-contaminated aquifers.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123864"},"PeriodicalIF":11.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bubble-triggered piezocatalytic generation of hydrogen peroxide by copper nanosheets-modified polyvinylidene fluoride films for organic pollutant degradation and water disinfection","authors":"Mingyang Xu ,&nbsp;Shengjun Yang ,&nbsp;Chenxi Guo ,&nbsp;Davida DuBois ,&nbsp;Shaowei Chen ,&nbsp;Fanqing Meng","doi":"10.1016/j.watres.2025.123865","DOIUrl":"10.1016/j.watres.2025.123865","url":null,"abstract":"<div><div>Piezocatalysis has emerged as an attractive technology for environmental remediation by the effective transformation of mechanical energy into electrical energy. Herein, copper nanosheets-modified polyvinylidene fluoride films (CuNS/PVDF) are synthesized via a facile wet-chemistry route and exhibit a much-enhanced piezoelectric property, as compared to pristine PVDF. This is ascribed to CuNS that increases the stress response point and Young’s modulus of the PVDF host. Among the series, CuNS₄_%/PVDF, with a 4 wt% loading of CuNS and a d₃₃ coefficient (39 pC N^-1) 2.6 times that of PVDF, exhibits the highest rate of H₂O₂ generation (163.3 μM g⁻¹ h⁻¹) by water oxidation in pure water under air bubbling, which is 3.7 times that of PVDF. This can be exploited for organic pollutant degradation and water disinfection, achieving a degradation rate of 99.8%, 98.37%, 89.02% and 81.60% for chlortetracycline hydrochloride, tetracycline, ofloxacin and ciprofloxacin, respectively, after 80 min's air bubbling, and 99.7% bactericidal efficiency against <em>Escherichia coli</em> after 12 h’s co-culture, along with excellent stability and recyclability. Notably, such a performance remains prominent in actual wastewater, seawater, tap water and other water environments. The reaction mechanisms are unraveled by the combined studies of spectroscopic measurements and theoretical calculations. Results from this work highlight the significance of structural engineering in enhancing the piezocatalytic activity of PVDF for water treatment and disinfection.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123865"},"PeriodicalIF":11.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification and environmental occurrence of novel per- and polyfluoroalkyl substances derived from lithium-ion battery","authors":"Yuanchen Chen ,&nbsp;Ruyue Guo ,&nbsp;Fangfang Ren ,&nbsp;Hangbiao Jin","doi":"10.1016/j.watres.2025.123862","DOIUrl":"10.1016/j.watres.2025.123862","url":null,"abstract":"<div><div>Global rise in electric vehicle adoption has prompted the rapid expansion of the lithium-ion battery (LIB) manufacturing and recycling industry. Many emerging classes of per- and polyfluoroalkyl substances (PFASs) have been incorporated into the LIB. However, the potential for PFAS emissions to the environment during the manufacturing and recycling processes of the LIB remains poorly understood. In this study, characteristic fragment ion-based non-target analysis was conducted to screen and identify unknown PFASs in surface water and sediment samples surrounding several LIB manufacturing and recycling factories. In total, 33 PFASs belonging to eight classes were identified in collected environmental samples with the confidence level of 1 − 3. Among these PFASs, environmental occurrence of <em>N</em>-ethyl perfluoromethanesulfonamide, <em>N</em>-hydroxymethyl trifluoromethanesulfonamide, and a series of bisperfluoroalkane sulfonimides (Bis-FASIs) is first discovered in this study. Furthermore, this study also investigated the sediment-water partitioning behaviors of these identified 33 PFASs. Results showed that the calculated mean log <em>K</em>_oc values in all sampling regions ranged from 0.51 ± 0.16 to 3.5 ± 0.34 for C₂−C₁₂ perfluoroalkyl carboxylates, 1.0 ± 0.31 to 2.9 ± 0.35 for C₁−C₈ perfluoroalkyl sulfonates, 1.2 ± 0.20 to 2.1 ± 0.19 for C₁−C₄ perfluoroalkane sulfonamides, and 1.9 ± 0.35 to 3.3 ± 0.16 for Bis-FASIs. In general, the log <em>K</em>_oc values of each class of PFASs linearly (<em>p</em> &lt; 0.05) increased with increasing number of fluorinated carbons. This study discovered seven novel PFASs, which underscores the need to expand regulatory monitoring beyond legacy PFASs. The findings of this study also highlight the urgency of assessing ecological and human health risks posed by LIB-derived PFASs, particularly their potential for long-range transport and persistence in aquatic systems.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123862"},"PeriodicalIF":11.4,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extracellular polymeric substance mediating nanoplastics-promoted short-term Porphyridium growth disrupts marine carbon and phosphorus migration","authors":"Huankai Li ,&nbsp;Wei Wang ,&nbsp;Feng Zhang ,&nbsp;Leijian Chen ,&nbsp;Fangfang Miao ,&nbsp;Hongzhi Zhao ,&nbsp;Zhu Yang ,&nbsp;Zongwei Cai","doi":"10.1016/j.watres.2025.123860","DOIUrl":"10.1016/j.watres.2025.123860","url":null,"abstract":"<div><div>The ecotoxicity of nanoplastics (NPs) on marine microalgae has been extensively explored recently, yet the mechanisms driving short-term growth improvement caused by NPs remain poorly understood. In the present study, we observed that a relatively high concentration (10 mg/L) of the green fluorescently labeled fresh polyamide-polymethyl methacrylate polymer blend (w/w 21:4) NPs beads (200 nm) significantly enhanced the cell density of <em>Porphyridium cruentum</em> (42.1 %) by alleviating reactive oxygen species generation, chlorophyll degradation, and photoinhibition. An increase in the sticky bounded exopolysaccharides (b-EPs) surrounding <em>P. cruentum</em> surface enhanced NP adsorption within five hours of exposure, with –CH₃ bond in phospholipids/glycolipids and polysaccharides of b-EPs supporting the adsorption to mitigate photoinhibition. Increased free exopolysaccharides (EPs) removed inorganic and organic carbon and 48 % of dissolved organic matter (DOM), encapsulating NPs into sediments while cooperating with pH elevation. However, short-term growth promotion resulted in cell shading and phosphorous deficiency after 12 days of cultivation. Consequently, the photosynthesis-antenna proteins pathway and energy metabolites were downregulated, whereas the transmembrane transport and receptor activities of phosphate and calcium signal pathways were upregulated to maintain growth, achieving balance in the 1 mg/L group. The significantly upregulated steroid biosynthesis promoted the hydrophobicity of plasma membranes and reduced the permeability for water-soluble ions, exacerbating phosphorus deficiency. The downregulation of the Calvin cycle shifted the total carbon metabolism and carbon migration, reducing photosynthesis and respiration but accumulating starch to counteract cell shading and phosphorus deficiency. These findings provide novel insights into the mechanisms underlying the short-term growth stimulation and long-term potential toxic effects of NPs on marine microalgae, thus altering marine carbon and phosphorus cycles.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123860"},"PeriodicalIF":11.4,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient conversion of municipal sludge to practical carbon source via N/MxOy in catalytic wet air oxidation","authors":"Kaiyu Fang ,&nbsp;Yang Tong ,&nbsp;Yuting Zhu ,&nbsp;Guodong Yao ,&nbsp;Xu Zeng ,&nbsp;Yecheng Xue ,&nbsp;Yangyuan Zhou ,&nbsp;Jianfu Zhao ,&nbsp;Siqing Xia","doi":"10.1016/j.watres.2025.123859","DOIUrl":"10.1016/j.watres.2025.123859","url":null,"abstract":"<div><div>The residual liquid phase after wet air oxidation of sludge has long been recognized as a potential carbon source due to its richness in volatile fatty acids (VFAs). However, nitrogen inevitably accumulates in the form of ammonia during the process, undermining the goal of adding a carbon source to aid bioreactors in nitrogen removal. To address this issue, different N/M_xO_y catalysts were synthesized with noble metal (N=Ru, Pt, Pd) and metal oxide supports (M_xO_y=Al₂O₃, TiO₂, CeO₂, ZrO₂). The entire process comprised the liquefaction of sludge and the subsequent refining of oxidation liquid. The performance of these catalysts was compared using various parameters, including total nitrogen (TN) removal, practical carbon source (PCS) production, and volatile fatty acids (VFAs) production, to ensure both the quantity and quality of the carbon source. Ru/TiO₂ was found to be the best catalyst, achieving a TN removal rate of 94.6 % and a PCS concentration of 2760 mg/L under optimized reaction conditions of 260 °C, 1.5 MPa O₂, 4.0 h, an initial pH of 7.1, and the addition of 3.0 g/L vacuum-dried catalyst. In general, 110.1 g COD carbon source could be produced per kg dry sludge. The reusability of the catalyst was examined, and PCS only decreased 4.7 % after four cycles of usage. The change in other dissolved organic matter was also investigated, with CHON and CHO molecules, as well as lignins and condensed hydrocarbons, being considered the dominant components. This study offers a viable approach for the resource utilization of municipal sludge.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123859"},"PeriodicalIF":11.4,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Loss of riparian canopy cover reduces the transfer of polyunsaturated fatty acid (PUFA) and simplifies the trophic links in stream food webs","authors":"Youzhi Yu ,&nbsp;Ke Zhang ,&nbsp;Hao Jiang ,&nbsp;Xiang Tan ,&nbsp;Quanfa Zhang","doi":"10.1016/j.watres.2025.123861","DOIUrl":"10.1016/j.watres.2025.123861","url":null,"abstract":"<div><div>Stream ecosystems have been impacted by multiple anthropogenic stressors including the loss of riparian canopy cover. However, it remains unclear how these stressors shape the profiles and transfer of fatty acids in basal resources, and subsequently affect the trophic linkages in stream food webs. We collected 158 food web samples including three basal resources (periphyton, fine benthic organic matter (FBOM) and seston), two primary consumers (macroinvertebrate and omnivorous fish), and one secondary consumer (carnivorous fish) together with water quality samples across an anthropogenic disturbance gradient in a small catchment (Laoguan River) of the Yangtze River, China. We investigated the influence of riparian land-use changes, canopy cover and water quality on the nutritional quality indicated by the proportions of eicosapentaenoic acid (EPA) in periphyton, seston and FBOM and their transfer in stream food webs. Our results showed that land use primarily affected the reduced the proportions of EPA in periphyton more than seston and FBOM. It was confirmed that loss of canopy coverage reduced the proportions of EPA of periphyton due to the significant correlations and difference between two groups: the least disturbed group (forest &gt; 90 %) and the highly disturbed group (high agriculture/urban). Compared to the least-disturbed sites, food webs appeared to be simpler with less trophic linkages at highly disturbed sites affected by agricultural and urban land uses. Finally, we validated that EPA was the important linkage between periphyton and primary consumers-macroinvertebrates, and further second consumers- omnivore fish, which may account for the decrease of network of trophic links at highly disturbed sites. This study provides insights into how anthropogenic stressors, particularly land-use changes and loss of riparian canopy cover, affect the nutritional quality of basal resources and simplify food web structures in stream ecosystems, highlighting the critical role of eicosapentaenoic acid (EPA) in linking trophic levels.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123861"},"PeriodicalIF":11.4,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced removal of organic micropollutants using 2D metal-organic framework interlayered nanofiltration membrane","authors":"Ruiying Li,&nbsp;Lingyue Zhang,&nbsp;Shuang Zheng,&nbsp;Wenyu Liu,&nbsp;Li Long,&nbsp;Chuyang Tang","doi":"10.1016/j.watres.2025.123852","DOIUrl":"10.1016/j.watres.2025.123852","url":null,"abstract":"<div><div>Organic micropollutants (OMPs) present considerable threats to both human health and the environment. Traditional thin film composite (TFC) nanofiltration (NF) polyamide membranes, despite their high water permeance and salt rejection capabilities, often fail to effectively remove OMPs. This study addresses this limitation by incorporating two-dimensional (2D) zinc(II) tetrakis(4-carboxy-phenyl)porphyrin (Zn-TCPP) metal-organic framework (MOF) nanosheets as interlayers in TFC membranes (TFNi), using a polyethylene glycol (PEG) assisted exfoliation technique to mitigate issues of nanosheet restacking and aggregation. The uniformly distributed MOF interlayers significantly improved pure water permeance from 10.6 to 32.1 L m⁻² h⁻¹ bar⁻¹ while maintaining a high rejection of 97.0% towards Na₂SO₄. Moreover, the optimized membrane showed significant improvements in OMP removal, attributed to the increased negative charge and greater hydrophilicity of the polyamide rejection layer. These findings highlight the potential of 2D MOF nanosheets as interlayers in developing high-performance membranes for effective OMP removal and water reuse.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123852"},"PeriodicalIF":11.4,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ozonation of wastewater effluent by the MEMBRO3X contactor: Micropollutants abatement and bromate mitigation","authors":"Jaedon Shin, Tony Merle, Arnaud Cockx, Caroline Gachet Aquilon, Urs von Gunten","doi":"10.1016/j.watres.2025.123853","DOIUrl":"https://doi.org/10.1016/j.watres.2025.123853","url":null,"abstract":"Wastewater treatment plants (WWTPs) are significant sources of micropollutants, potentially adversely affecting freshwater ecosystems. Ozonation is an effective way to abate micropollutants during treatment of wastewater effluent, however, the presence of bromide may lead to bromate, a potentially carcinogenic byproduct. The applicability of a hollow fiber porous membrane-based ozone contactor (MEMBRO₃X) was assessed for wastewater effluent treatment for the simultaneous abatement of micropollutants and bromate mitigation by investigating the effects of operating conditions (e.g., hydraulic retention times, gas phase concentrations of ozone and hydrogen peroxide dosing) and water quality parameters (concentration of dissolved organic matter (DOM) and level of alkalinity). In synthetic water containing Suwannee River Natural Organic Matter and bromide, MEMBRO₃X showed better performance for relative micropollutant abatement with minimal bromate formation compared to the conventional ozonation in the presence of high DOC concentration and high alkalinity for ozone gas phase concentrations of ≤ 10 gO₃ Nm^-3. Key ozone mass transfer parameters, including liquid velocity and membrane length, were also investigated to support interpretation of treatment performance. Adding H₂O₂ improved ozone mass transfer at the membrane interface, but also elevated bromate formation, making this an unfavorable option. Three secondary wastewater effluent samples were investigated, and a similar trend as for synthetic DOM-containing water was observed regarding water quality and process operating conditions. The calculated required membrane surface areas for the MEMBRO₃X process are 15 to 60 m² per cubic meter of treated water per hour, which aligns with typical membrane-based filtration systems. This suggests that the MEMBRO₃X process is a practical solution for effective micropollutant abatement with minimized bromate formation.","PeriodicalId":443,"journal":{"name":"Water Research","volume":"127 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-dimensional Prussian blue analog-based catalytic membrane for effective decontamination of micropollutants","authors":"Huiying Li ,&nbsp;Bingyu Wang ,&nbsp;Luyao Wang ,&nbsp;Yanbiao Liu ,&nbsp;Fengzhi Jiang","doi":"10.1016/j.watres.2025.123855","DOIUrl":"10.1016/j.watres.2025.123855","url":null,"abstract":"<div><div>Cost-effective, stable, and highly efficient catalytic technology is the key challenge for wastewater treatment based on advanced oxidation processes. Catalytic membranes, functioning as heterogeneous advanced oxidation microreactors, offer substantial advantages in the removal of organic pollutants. However, creating catalytic membranes with a high density of active sites for efficient and rapid degradation of pollutants in continuously flowing solutions poses challenges for practical applications. In this study, a two-dimensional Co/Fe-PBA catalytic membrane was developed and fixed onto a hydrophilic polytetrafluoroethylene (PTFE) membrane modified with polydopamine (PDA) through vacuum filtration. This membrane was used to activate peracetic acid (PAA) for the degradation of 17α-ethinylestradiol (EE2), an emerging environmental endocrine disruptor. The interaction between PAA and Co/Fe-PBA induces the continuous and rapid generation of free radicals and singlet oxygen (¹O₂). Furthermore, the hydrophilic catalytic membrane, containing nano-confined channels, facilitates the efficient transfer of aqueous solutions. The introduction of a PDA layer acts as an in-situ metal ion chelator, dynamically capturing leached metal ion during catalysis and thereby mitigating efficiency loss while reducing metal ion leaching. The Co/Fe-PBA/PDA catalytic membrane shows excellent efficiency in activating PAA to degrade EE2, with a catalytic efficiency close to 100 % in a single-pass filtration mode. In continuous flow mode, it maintains a 95 % degradation rate after 5 h of continuous filtration. The CH₃C(O)OO• radical and non-radical ¹O₂ are the primary reactive oxygen species (ROS) responsible for the oxidation of EE2. The degradation products of EE2 were identified through LC-MS analysis, and computational predictions indicate that, compared to EE2, the overall ecotoxicity of the degradation products is lower. The catalytic membrane also exhibits high degradation efficiencies for various organic pollutants. The activation of PAA by the catalytic membrane for EE2 degradation demonstrates excellent catalytic performance and mass transfer efficiency, overcoming the challenge of recycling powdery catalysts and providing new insights for the removal of emerging contaminants.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"283 ","pages":"Article 123855"},"PeriodicalIF":11.4,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}