Journal of water process engineering最新文献_第9页

Evaluation of vermifilter-treated domestic wastewater for irrigation and fertigation: opportunities and challenges for implementation 评价经蚯蚓过滤器处理的用于灌溉和施肥的生活废水：实施的机遇和挑战

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-21 DOI: 10.1016/j.jwpe.2025.108295

Kayla Coppens , Tess Geyer , Alexandre Monod , Linda Strande , Serge Stoll

{"title":"Evaluation of vermifilter-treated domestic wastewater for irrigation and fertigation: opportunities and challenges for implementation","authors":"Kayla Coppens , Tess Geyer , Alexandre Monod , Linda Strande , Serge Stoll","doi":"10.1016/j.jwpe.2025.108295","DOIUrl":"10.1016/j.jwpe.2025.108295","url":null,"abstract":"<div><div>Water reclamation can help meet agricultural irrigation and nutrient demands. Due to high nutrient loads, vermifiltration is often considered a suitable treatment solution for reclamation in agriculture. However, the ability of vermifiltration to meet irrigation standards is understudied. This study explores the feasibility of reclamation through irrigation and fertigation from two full-scale vermifilters treating black- and sedimented greywater in parallel and evaluates the removal efficiencies of metallic trace elements (MTEs), <em>E. coli</em>, and 15 organic micropollutants (OMPs). Microplastics in the effluent were also quantified. The results show that, for reclamation in agriculture, post-treatment of the vermifilter effluent is necessary to ensure reliable and sufficient effluent quality. Despite an overall log removal of 3.67, <em>E. coli</em> is the most restrictive parameter, conforming to irrigation standards only after the second post-treatment step. Various constraints, due to high nitrate concentrations and salinity, would also be necessary to avoid negative environmental and agronomic impacts. For fertigation, careful planning is needed to overcome excessive and variable nitrogen loads. Despite low and variable MTE removal, the effluent quality meets irrigation standards. Average removal of OMPs is 91 ± 15 %, and the coefficient of variation is <10 % for two-thirds of the OMPs. Suggested optimizations to improve the usability in agriculture include adding a disinfection step and urine separation. Future studies should focus on the impacts of vermifilter reclamation in agriculture on soil and crops, as well as the potential for designations such as toilet flushing and street cleaning, which are likely more advantageous in urban settings.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108295"},"PeriodicalIF":6.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tubular microreactor-based Fe(II)/periodate degradation of persistent textile dyes: Performance assessment, matrix evaluation and impact of ultrasound 基于管状微反应器的铁(II)/高碘酸盐降解持久性纺织染料：性能评价、基质评价和超声影响

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-21 DOI: 10.1016/j.jwpe.2025.108323

Slimane Merouani , Faten Z. Chabbi , Ghada Baali , Ghizlane Gharbi , Abderrahmane Talbi , Aouattef Belghit , Aissa Dehane , Oualid Hamdaoui

{"title":"Tubular microreactor-based Fe(II)/periodate degradation of persistent textile dyes: Performance assessment, matrix evaluation and impact of ultrasound","authors":"Slimane Merouani , Faten Z. Chabbi , Ghada Baali , Ghizlane Gharbi , Abderrahmane Talbi , Aouattef Belghit , Aissa Dehane , Oualid Hamdaoui","doi":"10.1016/j.jwpe.2025.108323","DOIUrl":"10.1016/j.jwpe.2025.108323","url":null,"abstract":"<div><div>The Fe(II)/periodate (PI) system is a promising oxidation process for water treatment due to its high reactivity and fast kinetics. However, its implementation in continuous-flow systems remains largely unstudied. This work presents the first systematic investigation of the Fe(II)/PI process within a tubular microreactor, designed to enhance mass transfer and reaction control. The system was evaluated under varying operational conditions, including flowrates, pH, Fe(II) dosage, and water matrix composition. Optimal performance was achieved at low dye and high PI flowrates, with Fe(IV) identified as the dominant oxidant under acidic conditions. At pH 3 and 120 μL/s PI, up to 82 % dye removal and 44 % TOC elimination were obtained. The Fe(II)/PI process outperformed conventional systems like Fe(II)/H₂O₂, Fe(II)/ peroxydisulfate (PDS), and Fe(II)/chlorine. The system's robustness was tested using real water samples, where degradation efficiency decreased in complex matrices, especially treated wastewater, due to Fe(IV) scavenging and reactants computation. Ultrasound integration further enhanced performance under low-flow regimes; moderate amplitudes (40–60 %) improved dye removal, while excessive cavitation at ≥80 % hindered reactivity. This study highlights the Fe(II)/PI microreactor as a compact and tunable platform for decentralized water treatment and demonstrates the added value of ultrasound for process intensification under select conditions.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108323"},"PeriodicalIF":6.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microbial changes in sludge after ultrasonic treatment: microbial viability, microbial community, and functional bacteria 超声处理后污泥中的微生物变化：微生物活力、微生物群落和功能菌

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-21 DOI: 10.1016/j.jwpe.2025.108353

Jie Zhang , Jingsong Liang , Zeliang Wang , Jizheng Zhang , Guangming Zhang

{"title":"Microbial changes in sludge after ultrasonic treatment: microbial viability, microbial community, and functional bacteria","authors":"Jie Zhang , Jingsong Liang , Zeliang Wang , Jizheng Zhang , Guangming Zhang","doi":"10.1016/j.jwpe.2025.108353","DOIUrl":"10.1016/j.jwpe.2025.108353","url":null,"abstract":"<div><div>Large amount of sludge is produced in wastewater treatment plants and requires proper handling. Ultrasonic treatment of sludge has multiple functions. This study examined in details the change of microbial community in ultrasound treated sludge. Results revealed that ultrasound effectively cracked the sludge and reduced the microbial viability. In the untreated sludge, the proportion of living cells approximated 97.3 %, and after ultrasonic treatment, the value decreased to 50.7 %. In addition, sonication effectively lysed sludge and reduced its particle size from 90.1 to 35.8 μm. Ultrasonic treatment altered the distribution of microbial genera in sludge and increased the relative proportion of <em>Terrimonas</em>. Following the functional predictions of PICRUSt2 and FAPROTAX, ultrasonic treatment improved N and P removal capacities of the sludge. Functional bacteria analysis revealed that ultrasonic treatment affected the communities of denitrifying, nitrifying, and phosphate-accumulating microbes; it decreased the diversity of nitrifying bacteria while increasing the diversity of denitrifying and phosphate-accumulating bacteria. Notably, this is the first study to focus exclusively on microbial changes in sludge caused by ultrasonic treatment, including predictions of microbial functions and genes. It may lay a foundation for subsequent practical applications.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108353"},"PeriodicalIF":6.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visible light-peroxomonosulfate coactivation via CuOx/Fe2O3 composites for efficient degradation of tetracycline and bimetallic mechanisms CuOx/Fe2O3复合材料对四环素高效降解的可见光-过氧单硫酸盐共活化及双金属机制

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-20 DOI: 10.1016/j.jwpe.2025.108363

Yue He , Shuang Xiao , Jiabin Zhou , Dan Liu , Zhipu Wang

{"title":"Visible light-peroxomonosulfate coactivation via CuOx/Fe2O3 composites for efficient degradation of tetracycline and bimetallic mechanisms","authors":"Yue He , Shuang Xiao , Jiabin Zhou , Dan Liu , Zhipu Wang","doi":"10.1016/j.jwpe.2025.108363","DOIUrl":"10.1016/j.jwpe.2025.108363","url":null,"abstract":"<div><div>A novel CuO<sub>x</sub>/Fe<sub>2</sub>O<sub>3</sub> composite catalyst was synthesized by a hydrothermal method and systematically evaluated for its peroxomonosulfate (PMS) activation capability under visible light irradiation, using tetracycline hydrochloride (TC-HCl) as the model pollutant. The results demonstrated that the CuO<sub>x</sub>/Fe<sub>2</sub>O<sub>3</sub> catalyst exhibited excellent catalytic oxidation performance, achieving 92.1 % TC-HCl degradation within 30 min through the generation of multiple reactive oxygen species (ROS) under visible light, including superoxide radicals (•O<sub>2</sub><sup>−</sup>), sulfate radicals (•SO<sub>4</sub><sup>−</sup>), hydroxyl radicals (•OH) and singlet oxygen (<sup>1</sup>O<sub>2</sub>). The mechanistic studies revealed that synergistic interaction between Fe and Cu bimetallic components significantly enhanced PMS activation efficiency, generating more reactive species and thereby increasing the degradation rate of TC-HCl. In addition, the CuO<sub>x</sub>/Fe<sub>2</sub>O<sub>3</sub>/PMS/vis system effectively degraded different pollutants (including Ciprofloxacin, Phenol, and Rhodamine B) and showed good tolerance to humic acid (HA) and salinity, among others. These findings highlight the practical potential of the CuO<sub>x</sub>/Fe<sub>2</sub>O<sub>3</sub>/PMS/vis oxidation system for the removal of organic pollutants in wastewater treatment field.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108363"},"PeriodicalIF":6.3,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced low C/N wastewater treatment in an AOA-AGS sequencing batch reactor via aerobically stimulating simultaneous nitrification and denitrification AOA-AGS序批式反应器处理高级低碳氮比废水的好氧刺激同步硝化反硝化

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-20 DOI: 10.1016/j.jwpe.2025.108362

Jiyi Chen , Long Chen , Yang Liu , Jingwei Ma , Weihong Wu , Xiang Wang , Yaning Ji , Yuhong Wen , Peng Bi , Hui Sun , Ying Han , Xinrui Zhang , Qiulai He

{"title":"Advanced low C/N wastewater treatment in an AOA-AGS sequencing batch reactor via aerobically stimulating simultaneous nitrification and denitrification","authors":"Jiyi Chen , Long Chen , Yang Liu , Jingwei Ma , Weihong Wu , Xiang Wang , Yaning Ji , Yuhong Wen , Peng Bi , Hui Sun , Ying Han , Xinrui Zhang , Qiulai He","doi":"10.1016/j.jwpe.2025.108362","DOIUrl":"10.1016/j.jwpe.2025.108362","url":null,"abstract":"<div><div>The anaerobic/oxic/anoxic-aerobic granular sludge (AOA-AGS) performing simultaneous nitrification, denitrification and phosphorus removal (SNDPR) is a promisingly emerging process for low carbon wastewater treatment. However, stability and performance of the AOA-AGS system to low carbon to nitrogen ratio (C/N) wastewater remains challenging and unknown. Herein, an AOA-AGS sequencing batch reactor (SBR) was applied treating wastewater with a C/N ratio of 4.6. It was found that the AOA-AGS system got steady after a short period of acclimation, and effective chemical oxygen demand, nitrogen and phosphorus removal was maintained via SNDPR. Microbial analysis revealed primary dominance of glycogen-accumulating organisms <em>Candidatus_Competibacter</em> (61.99 %) was found, with a dual role of keeping granular structure via slow-growing nature, and enhanced nitrogen removal via endogenous denitrification. Functional gene analysis indicated that nitrogen metabolism genes (e.g., <em>narG</em>, <em>nxrA</em>) were abundant. This study demonstrates that under simulated low carbon-to‑nitrogen ratio (C/<em>N</em> = 4.6) wastewater conditions, the AOA-AGS process exhibits excellent treatment performance and operational stability, providing valuable technical references for real-world low C/N wastewater treatment applications.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108362"},"PeriodicalIF":6.3,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A critical review of current treatment methods of acid mine drainage with an assessment of associated CO2 emissions toward carbon neutrality 对酸性矿山废水的当前处理方法进行了批判性审查，并对相关的二氧化碳排放进行了评估，以实现碳中和

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-19 DOI: 10.1016/j.jwpe.2025.108347

Guri Du , Hsing-Jung Ho , Atsushi Iizuka

{"title":"A critical review of current treatment methods of acid mine drainage with an assessment of associated CO2 emissions toward carbon neutrality","authors":"Guri Du , Hsing-Jung Ho , Atsushi Iizuka","doi":"10.1016/j.jwpe.2025.108347","DOIUrl":"10.1016/j.jwpe.2025.108347","url":null,"abstract":"<div><div>Acid mine drainage (AMD) has become an environmental concern owing to the widespread distribution and persistence of its toxic contents. Upon discharge into natural water systems without treatment, AMD causes serious problems, such as ocean acidification. Several different methods have already been introduced to address AMD, including prevention, active treatment, and passive treatment. In this review, AMD treatment methods and associated CO<sub>2</sub> emitting processes are critically discussed. During AMD treatment, CO<sub>2</sub> emission and adsorption occur through 1) physicochemical reactions, 2) power consumption and fossil fuel combustion, 3) biological activities, and 4) chemical reagent production. Active treatment systems emit more CO<sub>2</sub> than passive systems because of their high electricity and reagent demands. As the most effective treatment, active treatment can be conducted with reduced CO<sub>2</sub> emission by replacing CO<sub>2</sub> emitting energy sources and chemical neutralizers with carbon-neutral alternatives. CO<sub>2</sub> accounting is introduced to quantify the CO<sub>2</sub> emissions of neutralization processes conducted at real AMD active treatment plants.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108347"},"PeriodicalIF":6.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and experimental validation of backwash optimization in ultra low pressure reverse osmosis membrane (ULPRO) system for brackish water treatment 超低压反渗透膜（ULPRO）系统处理微咸水反冲洗优化建模及实验验证

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-19 DOI: 10.1016/j.jwpe.2025.108317

Azizullah Hanif , Mohd Usman Mohd Junaidi , Mohd Azlan Hussain

{"title":"Modeling and experimental validation of backwash optimization in ultra low pressure reverse osmosis membrane (ULPRO) system for brackish water treatment","authors":"Azizullah Hanif , Mohd Usman Mohd Junaidi , Mohd Azlan Hussain","doi":"10.1016/j.jwpe.2025.108317","DOIUrl":"10.1016/j.jwpe.2025.108317","url":null,"abstract":"<div><div>Ultra Low Pressure Reverse Osmosis (ULPRO) membrane systems offer a highly efficient and sustainable approach to brackish water purification, particularly suited for decentralized, energy-limited settings. This study presents a comprehensive integration of experimental validation and hybrid modeling to optimize both filtration and backwashing processes. A novel framework is developed by coupling the Hermia fouling model, which identifies dominant fouling mechanisms, with a dynamic resistance model that simulates resistance growth during filtration and exponential decay during backwash. Experiments using synthetic brackish water (2000 ppm NaCl) were conducted under various filtration durations (15–60 min) and backwash intervals (30–120 s) to mimic real-world operating conditions. Results demonstrate that backwash efficiency improves from 87 % to 93 % with longer filtration and cleaning durations, and lower fluxes enhance cleaning by preventing compact cake layer formation. Model predictions closely matched experimental data for resistance and flux recovery, validating the integrated framework. These results highlight the importance of optimizing backwash duration and filtration intervals to enhance cleaning efficiency, reduce energy consumption, and prolong membrane lifespan. By providing operationally relevant insights, this study advances the practical implementation of ULPRO systems as a cost-effective and sustainable solution for brackish water treatment.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108317"},"PeriodicalIF":6.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel Sb-doped SnO2 nanoflower anode for the efficient degradation of p-nitrophenol 一种新型sb掺杂SnO2纳米花阳极用于对硝基苯酚的高效降解

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-19 DOI: 10.1016/j.jwpe.2025.108334

Hailong Wang , Xinyu Sui , Shiyu Geng , Xuesong Zhao , Xiaoyue Duan

{"title":"A novel Sb-doped SnO2 nanoflower anode for the efficient degradation of p-nitrophenol","authors":"Hailong Wang , Xinyu Sui , Shiyu Geng , Xuesong Zhao , Xiaoyue Duan","doi":"10.1016/j.jwpe.2025.108334","DOIUrl":"10.1016/j.jwpe.2025.108334","url":null,"abstract":"<div><div>In this study, a Ti/Sb-SnO<sub>2</sub> nanoflowers (Ti/Sb-SnO<sub>2</sub> NFs) anode was fabricated and applied for the electrocatalytic oxidation of <em>p-</em>nitrophenol (<em>p-</em>NP) in wastewater. The electrocatalytic activity, degradation efficiency, toxicity variation of degradation intermediates, reactive oxygen species (ROS) contributions, and electrode stability were systematically investigated. The results demonstrated that the Ti/Sb-SnO<sub>2</sub> NFs anode exhibited a high <em>p-</em>NP removal efficiency (>99 %) and a mineralization efficiency (>90 %) after 120 min of electrolysis. Acute toxicity assessment using <em>Tetradesmus obliquus</em> and ecological structure-activity relationship (ECOSAR) modeling revealed that the original <em>p-</em>NP solution was highly toxicity, and the toxicity increased in the early oxidation stage due to the formation of toxic intermediates. However, prolonged electrolysis significantly reduced the toxicity, with a noticeable growth-promoting effect at 120 min. ROS quenching experiments and EPR spectroscopy confirmed that •OH (43.19 %) and O<sub>2</sub><sup>·-</sup> (24.57 %) were the dominant oxidative species. Moreover, cyclic voltammetry (CV) analysis revealed a non-radical direct oxidation pathway contributing 17.24 % to the overall degradation. The Ti/Sb-SnO<sub>2</sub> NFs anode exhibited excellent stability, maintaining >92 % degradation efficiency after ten consecutive cycles without any significant structural deterioration. These findings highlight the potential of Ti/Sb-SnO<sub>2</sub> NFs as a highly efficient and stable electrode material for the electrochemical treatment of refractory organic pollutants.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108334"},"PeriodicalIF":6.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance and mechanism of enhanced nitrogen removal by Fe/Cu/C micro-electrolysis coupled with salt-tolerant microorganisms in saline-alkali constructed wetlands 盐碱人工湿地Fe/Cu/C微电解加耐盐微生物强化脱氮性能及机理

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-19 DOI: 10.1016/j.jwpe.2025.108327

Xiaohui Ling , Yibo Wang , Chengrong Li , Wenxin Shi , Wenwen Cheng , Yujie Yuan , Tao Zhang , Xinmiao Wang

{"title":"Performance and mechanism of enhanced nitrogen removal by Fe/Cu/C micro-electrolysis coupled with salt-tolerant microorganisms in saline-alkali constructed wetlands","authors":"Xiaohui Ling , Yibo Wang , Chengrong Li , Wenxin Shi , Wenwen Cheng , Yujie Yuan , Tao Zhang , Xinmiao Wang","doi":"10.1016/j.jwpe.2025.108327","DOIUrl":"10.1016/j.jwpe.2025.108327","url":null,"abstract":"<div><div>Salt stress inhibits plant and microbial activity, reducing nitrogen removal efficiency in constructed wetlands (CWs) under saline conditions. To address this challenge, we proposed a new strategy to enhance nitrogen removal in CWs using Fe/Cu/C micro-electrolytic materials combined with salt-tolerant microorganisms (SM). The results showed that SM addition improved nitrogen removal efficiency. At 2 % salinity, total nitrogen (TN) removal efficiencies in cattail-based (CSM-CWs) and shallot-based (SSM-CWs) systems with SM were 72.06 % and 54.88 %, respectively, both higher than in systems without SM (C-CWs: 64.20 %; S-CWs: 40.22 %). Denitrification rates of the pure gravel substrate (PGS), SM-PGS, Fe/C-SM-PGS, and Fe/Cu/C-SM-PGS indicated that, at 2 % salinity, the rate for Fe/Cu/C-SM-PGS reached 4.71 mg/(m<sup>3</sup>·d), which was 1.09 mg/(m<sup>3</sup>·d) higher than SM-PGS. In saline-alkali CWs, the TN removal contribution of each component decreased in the order: substrate > SM > plants > Fe/Cu/C micro-electrolytic materials. High-throughput sequencing revealed that Fe/Cu/C material addition increased the abundance of <em>Patescibacteria</em> and <em>Bacteroidota</em> by 36.37 % and 3.67 %, respectively. <em>Patescibacteria</em>, which exhibit nitrifying and denitrifying capacities, reached 46.92 % abundance in Fe/Cu/C-SM-PGS, compared with only 0.1 % in SM-PGS.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108327"},"PeriodicalIF":6.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of intensive human activities on nitrate pollution in river basins: A spatiotemporal isotopic analysis 人类活动对流域硝酸盐污染的影响：时空同位素分析

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2025-07-19 DOI: 10.1016/j.jwpe.2025.108335

Shunqing Jia , Xihua Wang , Y. Jun Xu , Zejun Liu , Boyang Mao , Qinya Lv , Xuming Ji , Chengming Luo , Yan Dai , Yanxin Rong

{"title":"Impact of intensive human activities on nitrate pollution in river basins: A spatiotemporal isotopic analysis","authors":"Shunqing Jia , Xihua Wang , Y. Jun Xu , Zejun Liu , Boyang Mao , Qinya Lv , Xuming Ji , Chengming Luo , Yan Dai , Yanxin Rong","doi":"10.1016/j.jwpe.2025.108335","DOIUrl":"10.1016/j.jwpe.2025.108335","url":null,"abstract":"<div><div>Human activities are key drivers of nitrogen pollution in river basins. However, a comprehensive understanding of the dynamic spatiotemporal variations in nitrogen pollution sources and their proportions at a watershed scale under intensive human activities is still limited. This study provides new insights by investigating nitrogen pollution in the Yiluo River Basin, a major agricultural tributary of the Yellow River. We used dual stable isotopes of nitrate (δ<sup>15</sup>N-NO₃<sup>−</sup> and δ<sup>18</sup>O-NO₃<sup>−</sup>) and a MixSIAR model to analyze water samples collected across three periods from November 2022 to August 2023. The results revealed contrasting temporal trends: nitrate concentrations in surface water generally decreased over the study period, whereas groundwater nitrate levels peaked in May 2023, coinciding with the peak agricultural season. Spatially, nitrogen levels were consistently highest in the Yi River, lower in the Luo River, and showed accumulation in the downstream Yiluo River. The MixSIAR model identified soil nitrogen (SN), manure and sewage (MS), and chemical fertilizers (CF) as the primary nitrogen pollution sources, with atmospheric deposition (AP) playing a minor role. Critically, the proportional contributions of these sources varied significantly in both space and time. Upstream regions were predominantly influenced by soil nitrogen (up to 43.2 %), the midstream by chemical fertilizers (up to 30.4 %) especially during the growing season, and the downstream by manure and sewage (up to 54.2 %), reflecting increased urbanization. These findings underscore the dynamic nature of nitrogen pollution and demonstrate the necessity of developing targeted, region-specific strategies to achieve effective nitrogen management in intensively managed river basins.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"77 ","pages":"Article 108335"},"PeriodicalIF":6.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0