Water Research最新文献

{"title":"Treating nitrobenzene (NB) wastewater via an enhanced iron‒manganese oxides electron transfer strategy: Methods and mechanisms","authors":"Baoshan Wang ,&nbsp;Xiaojie Chen ,&nbsp;Gang Wen ,&nbsp;Zihao Duan ,&nbsp;Peiquan Xue ,&nbsp;Hang Gao","doi":"10.1016/j.watres.2025.123407","DOIUrl":"10.1016/j.watres.2025.123407","url":null,"abstract":"<div><div>Nitrobenzene (NB) is widely used in the fine chemical, pharmaceutical, and textile industries, but its toxicity and resistance to degradation present challenges, and traditional treatment methods are limited due to costs and a lack of efficiency. In this study, using a three-dimensional biofilm electrode reactor (3D-BER) enhanced with iron–manganese oxide catalysts was explored for the treatment of NB wastewater. Modifying polyurethane (PU) sponge fillers with Fe₃O₄ and Mn₃O₄ improved the conductivity and microbial electron transfer of the 3D-BER, significantly enhancing organic compound degradation, nitrogen and phosphorus removal. At the optimal voltage of 6 V and hydraulic retention time (HRT) of 24 h, the reactor achieved COD_Cr and ammonia nitrogen removal rates of 93.04 % and 86.25 %, respectively, which were more than 20 % higher than those in the control group. The iron and manganese present facilitated increased microbial activity and electron transfer efficiency, and metagenomic sequencing revealed shifts in the microbial communities and the enrichment of specific functional genes related to NB degradation. This integrated bioelectrochemical approach offers an effective and low-cost solution for treating NB wastewater, with broader implications for organic chemical wastewater management.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"278 ","pages":"Article 123407"},"PeriodicalIF":11.4,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143517848","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":"All-regional highly efficient moisture capturing and sunlight driven steam generation","authors":"Wenxin Lu ,&nbsp;Xiaorui Li ,&nbsp;Yingqi Wang ,&nbsp;Fei Yao ,&nbsp;Xingang Wang ,&nbsp;Hongliang Dai ,&nbsp;Hongya Geng","doi":"10.1016/j.watres.2025.123398","DOIUrl":"10.1016/j.watres.2025.123398","url":null,"abstract":"<div><div>Utilizing solar energy to extract and purify potable water from atmospheric humidity offers a viable approach to combat water scarcity in diverse geographical areas. However, current technologies face challenges related to low efficiency due to the low intrinsic permeability and weak hydrophilicity of H₂O, followed by ineffectiveness in diverse climatic conditions and long-lasting implementation. Herein, we develop a highly hygroscopic photothermal hydrogels consisting of chitosan polypyrrole (CP) copolymer matrix and zinc ions (Zn²⁺). The chelation of Zn²⁺ with CP avoids ionic leakage and endows the hierarchically porous hydrogel with strong hydration and moisture-absorbing properties. These hydrogels achieve an effective moisture capturing of up to 6.53 g g⁻¹ in a wide humidity range of 30% to 90%, which are the reminiscence of environment including desert and lakes. Furthermore, the grafting of photothermal polypyrrole to chitosan allowed the sunlight-driven steam generation with 87% efficiency of solar energy without additional power input. The recyclable moisture adsorption and desorption procedures maintain without observable deduction in efficiency over 2 weeks. A potable device containing our sunlight-driven antibacterial hydrogels displays the production of 1.3 kg m⁻² drinkable water per day, sufficient to meet the needs of a household. Its potential for application across diverse climatic conditions could refine water harvesting practices and guide future research on system optimization and scalability.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"279 ","pages":"Article 123398"},"PeriodicalIF":11.4,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143517851","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":"Toward zero liquid discharge treatment of semiconductor wastewaters with a hybrid system integrating forward osmosis and multi-stage nanofiltration","authors":"Jaewon Lee, Yeojin Shin, Hoyoung Ryu, Chanhee Boo, Seungkwan Hong","doi":"10.1016/j.watres.2025.123410","DOIUrl":"https://doi.org/10.1016/j.watres.2025.123410","url":null,"abstract":"The semiconductor industry produces large quantities of acidic wastewaters containing high levels of hydrofluoric acid (HF) and sulfuric acid (H₂SO₄), which poses severe environmental concern. Zero liquid discharge (ZLD) treatment of these wastewaters is a pressing need for sustainable growth of the semiconductor industry. Herein, we propose an innovative membrane-based hybrid system that combines forward osmosis (FO) with multi-stage NF process for simultaneous treatments of H₂SO₄ and HF wastewaters. The preceding FO process was designed to operate with HF wastewater (i.e., 200 ppm F^- and 189 ppm Cu²⁺ at different pH of 3 and 5) as a feed stream and neutralized H₂SO₄ wastewater (i.e., 1.0 M Na₂SO₄) as a draw stream. We demonstrate that the FO process allows &gt;55% dilution of the Na₂SO₄ waste stream while providing &gt;50% rejection of all ionic contaminants in the HF wastewater, especially over 90% rejection of copper ions. As a result, the concentration of Cu² increased more than three-fold in the feed stream, highlighting the potential for valuable metal recovery from the HF wastewaters. The following two-stage NF process was employed to produce fresh water from the diluted Na₂SO₄ waste stream at a maximum water recovery rate which satisfies the ZLD requirement. Our results show that two-stage low-salt-rejection NF (LSRNF) configuration can concentrate the Na₂SO₄ stream to 1.3 M, which is the critical concentration required for ZLD treatment, at a relatively moderate hydraulic pressure of 40 bar, while simultaneously producing high-quality water that meets discharge standards. We further modeled the multi-stage NF process to highlight the feasibility of the promising FO and two-stage LSRNF hybrid design for ZLD treatment of semiconductor wastewaters.","PeriodicalId":443,"journal":{"name":"Water Research","volume":"30 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143517850","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":"Megacity river as a critical anthropogenic source of strontium release in global Sr cycle: Insights from Bayesian mixing model and Sr isotope","authors":"Shitong Zhang ,&nbsp;Guilin Han ,&nbsp;Xi Gao ,&nbsp;Jinke Liu ,&nbsp;Nan Qiao","doi":"10.1016/j.watres.2025.123402","DOIUrl":"10.1016/j.watres.2025.123402","url":null,"abstract":"<div><div>Rapid urbanization has led to substantial anthropogenic disturbance of urban rivers and poses a significant threat to the marginal sea. Accurate identification and estimation of human interferences in urban rivers is critical to elucidate the current status of urban impact. Strontium isotope is a useful tool to trace river material origins. This study reported strontium and its isotope data from the most typical megacity river in China. The dissolved Sr concentration (440.6 μg/L) was much higher than the global average (78.3 μg/L) while ⁸⁷Sr/⁸⁶Sr exhibited the opposite (0.7104 in megacity river and 0.7119 in global rivers), revealing distinctive urban characteristics. According to elemental ratios and correlation analysis, basic judgments have been made on five specific human-related endmembers (sewage, fertilizer, coal, municipal water, and irrigation). To accurately estimate source contributions, water chemistry and ⁸⁷Sr/⁸⁶Sr were innovatively coupled as highly sensitive tracers. Bayesian model results confirmed that weathering and human activities jointly control solute compositions, and anthropogenic sources (61.2%) dominated the middle-lower region. Upper reach exhibited half of the contributions from weathering and coal mining (35.2%) also played non-negligible roles. Among five human-related origins, municipal input presented the highest proportion. Sr flux was 1.97 × 10⁴ tons/yr, and urban activities contributed over half of the flux, revealing that municipal, coal mining, and sewage input posed a critical threat to the elemental cycling of the marginal sea. Urban rivers may serve as a significant Sr source in the global Sr cycle. Further investigation and long-term observations on megacity rivers are urgently needed to achieve coordinated and sustainable development of the continent-ocean system.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"278 ","pages":"Article 123402"},"PeriodicalIF":11.4,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143517849","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":"Surface-engineered nanofiltration membranes for sustainable lithium recovery from real brine: Addressing fouling and scaling challenges","authors":"Xuesong Li ,&nbsp;Man Xu ,&nbsp;Xin Liu ,&nbsp;Qianhong She ,&nbsp;Woei Jye Lau ,&nbsp;Linyan Yang","doi":"10.1016/j.watres.2025.123400","DOIUrl":"10.1016/j.watres.2025.123400","url":null,"abstract":"<div><div>Nanofiltration (NF) membranes hold great promise for lithium (Li) recovery from brines, with numerous studies focusing on improving Li/Mg separation performance. However, real brine environments pose significant challenges, as fouling and scaling severely hinder Li recovery efficiency. Despite their critical impact, these challenges have received limited attention. This study addresses these issues through surface engineering of polyamide (PA) NF membranes, achieving a positively charged, ultra-smooth surface. The engineered membrane demonstrated exceptional fouling and scaling resistance during real brine treatment, exhibiting only a 12 % flux decline over 12 h, compared to 28 % and 20 % for the control and commercial NF270 membranes, respectively. This superior antifouling performance enabled sustained high Li flux (&gt;80 mM·m⁻²·h⁻¹) while reducing the Mg/Li mass ratio from 4.1 in the feed to 1.4 in the permeate. Additionally, the membrane displayed remarkable resistance to scaling in synthetic brine containing high concentrations of Ca²⁺ and SO₄²⁻. Systematic evaluations in both synthetic and real brines revealed that the enhanced process stability arises from the synergistic effects of reduced surface roughness and optimized surface charge, which together minimize foulant adhesion and mitigate scaling. These findings mark a significant advancement toward the practical implementation of membrane-based Li recovery, underscoring the critical importance of addressing fouling and scaling in real brine environments.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"278 ","pages":"Article 123400"},"PeriodicalIF":11.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507302","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":"The substrate configuration influences pollutant removal in constructed wetlands: From the aspects of submerged status of substrate and carbon-felt distribution","authors":"Xiang-Zheng Li ,&nbsp;Tong Wang ,&nbsp;Ting Yang ,&nbsp;Xue Li ,&nbsp;Lin-Wei Wu ,&nbsp;Lin-Lan Zhuang ,&nbsp;Jian Zhang","doi":"10.1016/j.watres.2025.123396","DOIUrl":"10.1016/j.watres.2025.123396","url":null,"abstract":"<div><div>Redox regulation dominates the pollutant removal in constructed wetlands (CWs). To enhance efficient and cost-effective nitrogen removal, this study intended to build an unsaturated zone and add carbon-felt material for electron donor/acceptor adjustment. The unsaturated zone heights (0, 10, 20 cm) and carbon-felt distribution patterns (evenly scattered (CW_SE), continuously linked (CW_L), and head-tail linked like microbial fuel cells (CW_MFC)) were simultaneously adjusted. Moreover, their effects and underlying microbial mechanisms on water purification were investigated. Results indicated that CWs with a 20 cm unsaturated zone achieved over 99 % ammonia nitrogen removal. CW_SE facilitated optimal pollutant-microbe contact, enabling efficient in-situ electron utilization for 64.27 % total nitrogen removal through simultaneous nitrification-denitrification and anammox. In CW_L, continuous carbon-felt distribution allowed efficient electron transport at a relatively macro-area and enhanced electron consumption by oxygen at the surface, leading to superior ammonia oxidation (82.97 %) in the middle area of CW_L. Conversely, CW_MFC facilitated direct electron transfer through the whole CW, enriched <em>Geobacter</em> at the top and <em>Vibrio</em> at the bottom, achieving 84.23 % total nitrogen removal through nitrification-denitrification under high oxygenation. This study elucidated microbial community niche differentiation in CWs mediated by carbon-felt electron transport and proposed optimal application scenarios for different carbon-felt configurations.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"278 ","pages":"Article 123396"},"PeriodicalIF":11.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495954","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":"Vigilance against climate change-induced regime shifts for phosphorus restoration in shallow lake ecosystems","authors":"Yang Li ,&nbsp;Yuan Liu ,&nbsp;Siqi Yu ,&nbsp;Bin Xing ,&nbsp;Xinwei Xu ,&nbsp;Haihao Yu ,&nbsp;Ligong Wang ,&nbsp;Dihua Wang ,&nbsp;Chunhua Liu ,&nbsp;Dan Yu","doi":"10.1016/j.watres.2025.123397","DOIUrl":"10.1016/j.watres.2025.123397","url":null,"abstract":"<div><div>The dual pressure of anthropogenic activities and frequent extreme weather events has triggered a transition from macrophyte to algal dominance in shallow lakes. Phosphorus (P) is the key driver of regime shifts that can lead to a decline in the stability and resilience of lake ecosystems. However, the mechanisms underlying such regime shifts, and the effects of state transitions on internal P loading during macrophyte restoration in large shallow eutrophic lakes, remain to be fully elucidated. This study utilised long-term in situ monitoring data, across three distinct lake states (bare ground, macrophyte-dominated stage, and algae-dominated stage) to elucidate the accumulation and release mechanisms of sedimentary P during regime shifts. The findings demonstrated that the rehabilitation of submerged plants efficiently reduced internal P loading (water column P, sediment P fractions, and P flux), while the persistence of algal blooms was driven by the reductive release of Fe-P from sediments and the dissolution of Al-P from suspended particulate matter. High temperature, low dissolved oxygen, and high pH largely modulate the pathways and mechanisms of P supply during regime shifts. The combined pressures of extreme weather (heavy rainfall, strong winds, and extreme heat) and trophic cascades from fish stocking can trigger a shift from macrophytes to algae in shallow lakes. Appropriate management of the structure and biomass of aquatic animal communities (e.g., small-bodied or omnibenthivorous fish) and optimization of the food web structure can effectively improve water quality and maintain ecosystem stability. These findings enrich the theoretical understanding of regime-shift mechanisms from an ecosystem perspective and offer novel insights into P remediation in large shallow eutrophic lakes.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"278 ","pages":"Article 123397"},"PeriodicalIF":11.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495951","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":"Quantifying the fate of biogenic elements in mangrove aquifers: Insights from reactive transport modeling under saltwater-freshwater mixing","authors":"Kang Peng ,&nbsp;Lu Yan ,&nbsp;Xianjun Xie ,&nbsp;Yamin Deng ,&nbsp;Yiqun Gan ,&nbsp;Qinghua Li ,&nbsp;Yanpeng Zhang ,&nbsp;Xianqiang Tang","doi":"10.1016/j.watres.2025.123381","DOIUrl":"10.1016/j.watres.2025.123381","url":null,"abstract":"<div><div>Saltwater-freshwater mixing in mangrove wetlands drives complex biogeochemical processes that regulate the cycling and transformation of key elements. Yet, the detailed quantification of biogenic element cycling and transformations under saltwater-freshwater interactions remains insufficiently explored. This study developed a field-scale reactive transport model, constrained by multi-level monitoring and hydrochemical data, to investigate the migration, transformation, and fluxes of biogenic elements (C, N, S, Fe) in the Dongzhai Harbor mangrove wetland aquifer. The results reveal that freshwater-saltwater mixing and groundwater discharge enrich NH₄⁺ and HCO₃⁻, while elevated sedimentary iron content primarily reflects Fe²⁺ accumulation in groundwater. Heterotrophic reactions, including aerobic respiration, denitrification, and nitrification, dominate in high-flow regions, while iron and sulfate reduction occur across aquifer layers, influenced by DOC availability and transport dynamics. Low molecular weight DOC entering the aquifer originates primarily from oceanic inputs and sedimentary organic matter degradation (44.8 %), with a minor contribution from terrestrial groundwater. Of this, 71.2 % undergoes microbial reactions, significantly supporting nitrate removal (1.24 × 10⁶ mol/year) while producing HCO₃⁻ and NH₄⁺. The aquifer is estimated to produce 2.37 × 10⁶ mol of DOC annually. Simulations demonstrate that aquaculture wastewater, enriched in DOC, ammonium, and nitrate, enhances solute inflow and reaction activity, increasing DOC and ammonium discharge to surface waters, despite nitrate removal rates remaining high (up to 83 %). Changes in vertical permeability, related to mangrove root systems and benthic organisms, further influence nutrient cycling. Increased permeability promotes solute exchange and nitrate removal but reduces efficiency, whereas decreased permeability reduces nitrate removal but enhances its efficiency. These findings underscore the critical role of mangrove wetlands in regulating nutrient cycles and maintaining ecological stability, offering insights to support their sustainable management.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"278 ","pages":"Article 123381"},"PeriodicalIF":11.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495953","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":"Effectively mitigated eutrophication risk by strong biological carbon pump (BCP) effect in karst reservoirs","authors":"Wenke Zhang ,&nbsp;Wanfa Wang ,&nbsp;Sen Xu ,&nbsp;Qingqing Sun ,&nbsp;Wenhong Shi ,&nbsp;Jiayi Man ,&nbsp;Shengde Yu ,&nbsp;Yujing Yang ,&nbsp;Wenxin Wu ,&nbsp;Xia Hu ,&nbsp;Qixin Wu ,&nbsp;Pan Wu ,&nbsp;Si-Liang Li","doi":"10.1016/j.watres.2025.123395","DOIUrl":"10.1016/j.watres.2025.123395","url":null,"abstract":"<div><div>Karst reservoirs can significantly enhance the effect of biological carbon pump (BCP), a crucial process for carbon sequestration, water purification, and eutrophication mitigation. However, the effects of BCP on the fate of carbon (C), nitrogen (N), and phosphorus (P) and its role in regulating eutrophication within river-reservoir systems, remains insufficiently understood, particularly across different geological settings. We investigated the Hongfeng Reservoir (HFR), a typical karst reservoir, analyzing water chemistry, nutrient concentrations, and stable isotopes of dissolved inorganic carbon (δ¹³C_DIC) and nitrate (δ¹⁵N-NO₃^-) to uncover the underlying mechanisms governing the migration of biogenic elements and the process of eutrophication. Our findings reveal a strong BCP effect in the reservoirs that leads to substantial CO₂ and HCO₃^- uptake via phytoplankton photosynthesis during the warm-wet season, resulting in decreased dissolved inorganic carbon (DIC) concentrations and increased pH in the epilimnion. The δ¹³C_DIC (−4.0 ± 0.5 ‰) values in the epilimnion relatively increased in response to phytoplankton photosynthesis that preferentially absorbs the lighter isotope of ¹²C. Compared with the inflow, the δ¹⁵N-NO₃^- (7.4 ± 0.2 ‰) in the epilimnion of the reservoir is significantly depleted, with the water predominantly aerobic or oxygen-supersaturated. This suggests that nitrification is the dominant process during the warm-wet season. The high NO₃^- concentrations (44.3 ± 10.1 μmol/L) indicate a sufficient N supply for biological uptake. The strong BCP effects in the epilimnion convert substantial amounts of DCO₂ and nutrients into autochthonous organic matter. The resulting increase in pH further reduces the availability of DCO₂. Furthermore, BCP-induced calcium carbonate precipitation enhances P removal through co-precipitation, thereby accelerating nutrient depletion and carbon sequestration, which collectively contribute to the mitigation of eutrophication risks. To assess the broader applicability of these findings, we analyzed data from 129 lakes and reservoirs globally. Our results show that karst reservoirs, with their strong BCP effect, exhibit an average Carlson trophic status index (CTSI) 9.8 % lower than non-karst reservoirs, indicating a reduced risk of eutrophication. These insights offer valuable implications for the management of water resources in karstic reservoirs globally.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"278 ","pages":"Article 123395"},"PeriodicalIF":11.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495991","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 phosphate recovery in R-MCDI systems: Synergistic effects of modified electrodes and membrane-electrode-current collector assembly","authors":"Yunfei He ,&nbsp;Tie Gao ,&nbsp;Ao Gong ,&nbsp;Guangteng Wang ,&nbsp;Wanpeng Si ,&nbsp;Peng Liang","doi":"10.1016/j.watres.2025.123392","DOIUrl":"10.1016/j.watres.2025.123392","url":null,"abstract":"<div><div>Efficient phosphorus (P) recovery is critical for sustainable wastewater management and resource reuse. This study optimized a reservoir of membrane capacitive deionization (R-MCDI) system by integrating acid-modified activated carbon cloth (ACC) electrodes and a membrane-electrode-current collector assembly (MECA) configuration. Acid modification enhanced the electrode's specific surface area, microporosity, and carboxyl group content, while reducing charge transfer resistance, significantly improving P recovery and selectivity. The ACC-42 electrode achieved optimal performance, achieving a 52% P recovery efficiency and low energy consumption of 8.8 kWh/kg P. The MECA configuration further amplified P recovery by optimizing electric field distribution and maximizing electrode utilization, achieving a fourfold higher recovery rate (0.081 μmol·cm^-2·min^-1) while reducing energy consumption by 59% compared to alternative setups. Multi-cycle operations validated the system's robustness, with P concentrations reaching 397 mg/L in the electrode chamber and a nearly 15-fold increase in selectivity for P over sulfate. This study highlights the synergistic effects of electrode modification and assembly configuration in enhancing R-MCDI performance, providing a scalable and energy-efficient solution for nutrient recovery in wastewater treatment.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"278 ","pages":"Article 123392"},"PeriodicalIF":11.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495956","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}