Journal of water process engineering最新文献_第6页

Study on the performance of gas-liquid-solid multi-phase spiral separator for oilfield recovery fluids separation 气液固多相螺旋分离器用于油田采出液分离的性能研究

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-17 DOI: 10.1016/j.jwpe.2025.108764

Haonan Wu (吴浩男) , Yan Xu (徐艳) , Zhong Yin (印重) , Yuejuan Yan (闫月娟) , Sen Li (李森) , Jinglong Zhang (张井龙) , Jiaxiang Wang (王家祥)

{"title":"Study on the performance of gas-liquid-solid multi-phase spiral separator for oilfield recovery fluids separation","authors":"Haonan Wu (吴浩男) , Yan Xu (徐艳) , Zhong Yin (印重) , Yuejuan Yan (闫月娟) , Sen Li (李森) , Jinglong Zhang (张井龙) , Jiaxiang Wang (王家祥)","doi":"10.1016/j.jwpe.2025.108764","DOIUrl":"10.1016/j.jwpe.2025.108764","url":null,"abstract":"<div><div>Efficient gas–liquid–solid pre-separation of oilfield recovery fluids is essential for downstream processing. Conventional feed systems fail to separate sand, suffer from high pressure drops, and operate with low efficiency. This study introduces a spiral multiphase pre-separator (SMPPS) and employs computational fluid dynamics (CFD) to examine flow distribution, separation mechanisms, and the effects of gas fraction, particle size, and viscosity on performance. Results show that the SMPPS stabilizes the flow field, suppresses turbulence, and maintains a pressure drop below 0.025 MPa. Performance boundaries are defined: at 35–40 % gas fraction, 0.2–0.3 mm particle size, and 1–3 mPa·s viscosity, gas and solid separation efficiencies exceed 91 % and 73 %. These findings provide both theoretical guidance and practical support for optimizing multiphase pre-separation and applying spiral separators in oilfield operations.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108764"},"PeriodicalIF":6.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096613","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

Enhanced phosphate removal and recovery by Mg/Al-layered double hydroxide modified D201 resin for water treatment Mg/ al层状双氢氧化物改性D201树脂对水处理中磷酸盐的去除和回收

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-17 DOI: 10.1016/j.jwpe.2025.108767

Jirui Zou , Anlei Wei , Yaqi Zhu , Kangrong Tang , Zixuan Wang , Hanxiao Shi

{"title":"Enhanced phosphate removal and recovery by Mg/Al-layered double hydroxide modified D201 resin for water treatment","authors":"Jirui Zou , Anlei Wei , Yaqi Zhu , Kangrong Tang , Zixuan Wang , Hanxiao Shi","doi":"10.1016/j.jwpe.2025.108767","DOIUrl":"10.1016/j.jwpe.2025.108767","url":null,"abstract":"<div><div>A novel Mg/Al-LDH@D201 composite was synthesized by combining Mg/Al layered double hydroxide (LDH) with D201 anion-exchange resin, achieving synergistic phosphate adsorption exceeding the capabilities of individual components. This enhanced performance stems from D201's ion exchange and LDH's dual mechanisms (interlayer exchange and surface complexation), confirmed by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) analyses. Scanning electron microscopy (SEM) revealed increased surface roughness with LDH loading, indicating more adsorption sites, while X-ray diffraction (XRD) confirmed high LDH crystallinity. Batch experiments showed a high adsorption capacity (49.51 mg g<sup>−1</sup> at 298 K), rapid kinetics, and excellent selectivity across pH = 7–8, even with competing anions (e.g., sulfate, nitrate). Fixed-bed studies assessed bed height, flow rate, and initial concentration, demonstrating effective continuous phosphate removal for wastewater treatment. Efficient regeneration (>80 % over five cycles) highlights practical potential. The synergistic interaction, enhanced surface properties, and selectivity position Mg/Al-LDH@D201 as a promising material for efficient phosphate removal and recovery from aqueous solutions. DFT calculations further supported these mechanisms by revealing strong binding affinities between phosphate species and Mg/Al-LDH@D201 surface sites.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108767"},"PeriodicalIF":6.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096610","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

Beyond point predictions: Quantifying uncertainty in E. coli ML-based monitoring 超越点预测：量化大肠杆菌基于ml的监测中的不确定性

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-17 DOI: 10.1016/j.jwpe.2025.108734

David Abert-Fernández , Ester Aguilera , Pere Emiliano , Fernando Valero , Hèctor Monclús

{"title":"Beyond point predictions: Quantifying uncertainty in E. coli ML-based monitoring","authors":"David Abert-Fernández , Ester Aguilera , Pere Emiliano , Fernando Valero , Hèctor Monclús","doi":"10.1016/j.jwpe.2025.108734","DOIUrl":"10.1016/j.jwpe.2025.108734","url":null,"abstract":"<div><div>Machine learning regression models are increasingly used to improve management, decision-making, and monitoring of drinking water quality, leveraging growing data from real-time sensors and laboratory analyses. However, most models provide only point predictions, ignoring inherent uncertainty caused by unobserved factors that can produce varying outcomes under similar conditions. This study benchmarks state-of-the-art regression algorithms and uncertainty quantification methods for predicting <em>E. coli</em> concentrations in a drinking water catchment. Gradient-boosted decision trees (GBDT) proved effective for real-time tracking, with CatBoost achieving the lowest error (RMSLE = 0.877), improving on the naïve baseline (1.160) and outperforming Random Forest by 5 %. Uncertainty quantification techniques successfully generated valid prediction intervals to identify high-risk contamination events, with Conformalized Quantile Regression emerging as the most reliable method. By combining accurate GBDT predictions with well-calibrated uncertainty estimates, this approach enhances microbial water quality forecasting, offering improved risk assessment and supporting more robust decision-making in drinking water management.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108734"},"PeriodicalIF":6.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096611","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

Defective MOFs doped with cerium (III) for enhanced phosphate removal and dye adsorption 掺杂铈（III）的缺陷mof增强磷酸盐去除和染料吸附

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-17 DOI: 10.1016/j.jwpe.2025.108766

Yifeng Wang , Yongxuan Xiang , Jiapeng Wang , Hua-Bin Yuan , Guoqiang Chen , Ping Yao , Tieling Xing

{"title":"Defective MOFs doped with cerium (III) for enhanced phosphate removal and dye adsorption","authors":"Yifeng Wang , Yongxuan Xiang , Jiapeng Wang , Hua-Bin Yuan , Guoqiang Chen , Ping Yao , Tieling Xing","doi":"10.1016/j.jwpe.2025.108766","DOIUrl":"10.1016/j.jwpe.2025.108766","url":null,"abstract":"<div><div>Phosphates and dyes are two common pollutants in wastewater, yet research on their simultaneous removal remains limited. In this study, defective Ce<sub>X</sub>Zr<sub>1</sub>-1,3,5-Benzenetricarboxylic acid (BTC) were synthesized via a metal doping strategy, where x denotes the molar ratio of Ce to Zr. Defective MOFs were synthesized using water and acetic acid (HAc) as the solvent and modulator, respectively, replacing <em>N</em>, <em>N</em>-dimethylformamide (DMF) and formic acid (FA) in the traditional synthesis method. The number of missing linkers was quantified using thermogravimetry analysis and potentiometric acid-base titration. The successful synthesis of Ce<sub>X</sub>Zr<sub>1</sub>-BTC was confirmed by powder X-ray diffraction (PXRD), and X-ray photoelectron spectroscopy (XPS). Ce<sub>0.75</sub>Zr<sub>1</sub>-BTC showed a great phosphate adsorption performance (234.7 mg/g) under optimized conditions, with a dosage of 0.2 g/L, an initial phosphate concentration of 200 ppm, pH 2, and a temperature of 303 K. Additionally, benefiting from more adsorption sites and reduced internal diffusion limitations, it retained more than 95 % phosphate removal efficiency after four consecutive applications and was able to treat 392 bed volumes of phosphate solution. Furthermore, Ce<sub>0.75</sub>Zr<sub>1</sub>-BTC could selectively adsorb anionic dyes in mixed dyes solution, and the adsorption mechanisms mainly involve electrostatic attraction, π-π stacking, and hydrogen bonding. It reduced phosphate concentrations to 1.17 μg/L and significantly lowered the COD of simulated phosphate-containing dye wastewater, demonstrating its potential for practical wastewater treatment applications.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108766"},"PeriodicalIF":6.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096612","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

Enhanced dual-functional performance on the tetracycline degradation and chromium detoxification via Z-scheme COF/TiO2-NH2 heterojunctions 通过Z-scheme COF/TiO2-NH2异质结增强了四环素降解和铬脱毒的双功能性能

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-16 DOI: 10.1016/j.jwpe.2025.108770

Meng-Wei Zheng , Ngoc Thanh Thuy Tran , Shou-Heng Liu

{"title":"Enhanced dual-functional performance on the tetracycline degradation and chromium detoxification via Z-scheme COF/TiO2-NH2 heterojunctions","authors":"Meng-Wei Zheng , Ngoc Thanh Thuy Tran , Shou-Heng Liu","doi":"10.1016/j.jwpe.2025.108770","DOIUrl":"10.1016/j.jwpe.2025.108770","url":null,"abstract":"<div><div>The coexistence of emerging contaminants and heavy metals in wastewater poses significant environmental risks, necessitating the development of efficient and sustainable remediation strategies. In this study, a covalently integrated <em>Z</em>-scheme heterojunction photocatalyst (TrPa/TiO<sub>2</sub>-NH<sub>2</sub>) is synthesized for the simultaneous photodegradation of tetracycline (TC) and photoreduction of hexavalent chromium (Cr(VI)) under simulated sunlight irradiation. The composite exhibits enhanced charge separation efficiency, as demonstrated by photoluminescence, electrochemical impedance spectroscopy, and transient photocurrent measurements. Under optimized conditions, TrPa/TiO<sub>2</sub>-NH<sub>2</sub> achieves 93.7 % of TC degradation (<em>k</em><sub>obs</sub> = 0.018 min<sup>−1</sup>) and nearly complete Cr(VI) reduction within 120 min (<em>k</em><sub>obs</sub> = 0.025 min<sup>−1</sup>) and also maintains excellent stability during multiple cycles in real water matrices. Mechanistic analysis and density functional theory (DFT) calculations reveal that photogenerated electrons predominantly reduce Cr(VI), a process that is thermodynamically more favorable than O<sub>2</sub> reduction. This sequential reduction pathway explains why the presence of <sup>•</sup>O<sub>2</sub><sup>−</sup> slightly affects Cr(VI) removal but plays a vital role in TC oxidation. Similarly, reactive species scavenging and electron paramagnetic resonance analyses confirm that <sup>•</sup>O<sub>2</sub><sup>−</sup>, h<sup>+</sup> and <sup>•</sup>OH are responsible for the oxidation of TC, while photogenerated electrons primarily mediate the reduction of Cr(VI). This study provides mechanistic insights into COF-based <em>Z</em>-scheme photocatalysts and presents a promising strategy for addressing complex wastewater contamination.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108770"},"PeriodicalIF":6.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096603","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

Myxococcus xanthus DK1622 enhance sludge dewatering performance 黄粘球菌DK1622提高污泥脱水性能

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-16 DOI: 10.1016/j.jwpe.2025.108765

Gongxu Zhang , Zheng Yao , Chenxi Zhang , Shuai Zhang , Helai Cheng

{"title":"Myxococcus xanthus DK1622 enhance sludge dewatering performance","authors":"Gongxu Zhang , Zheng Yao , Chenxi Zhang , Shuai Zhang , Helai Cheng","doi":"10.1016/j.jwpe.2025.108765","DOIUrl":"10.1016/j.jwpe.2025.108765","url":null,"abstract":"<div><div>The removal of bound water remains one of the most significant challenges in sludge reduction. As classic predatory microorganisms, myxobacteria, exhibit broad-spectrum predatory activity against various organisms. However, it remains unclear whether myxobacteria can prey on sludge microorganisms and subsequently induce bound water release. This study demonstrates that the application of myxobacteria at different concentrations significantly reduced water content, total suspended solids (TSS), and volatile suspended solids (VSS) in sludge. Notably, the addition of <em>Myxococcus xanthus</em> DK1622 at 200 mg/L achieved a 0.85 % reduction in water content. At this optimal concentration, TSS and VSS decreased by up to 4.58 g/L and 2.29 g/L, respectively. The predation process induced significant changes in extracellular polymeric substances (EPS), with protein and polysaccharide concentrations increasing by 2.3-fold and 1.2-fold, respectively. These alterations were attributed to cellular material leakage during predation, which in turn contributed to EPS accumulation. Furthermore, the disruption of microbial aggregates via predatory activity facilitated the release of bound water from the sludge. These findings provide valuable insights for potential applications of myxobacteria in biological sludge dewatering processes.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108765"},"PeriodicalIF":6.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096657","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

An acid- and low-temperature-tolerant heterotrophic nitrification-aerobic denitrification strain for soybean processing wastewater treatment 一株耐酸耐低温异养硝化-好氧反硝化菌株处理大豆加工废水

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-16 DOI: 10.1016/j.jwpe.2025.108728

Xiaofeng Chen, Zhengyu Ma, Yanfei Shu, Na You, Xiaobing Wang, Guangyuan Chen

{"title":"An acid- and low-temperature-tolerant heterotrophic nitrification-aerobic denitrification strain for soybean processing wastewater treatment","authors":"Xiaofeng Chen, Zhengyu Ma, Yanfei Shu, Na You, Xiaobing Wang, Guangyuan Chen","doi":"10.1016/j.jwpe.2025.108728","DOIUrl":"10.1016/j.jwpe.2025.108728","url":null,"abstract":"<div><div>A heterotrophic nitrification-aerobic denitrification (HN-AD) strain, <em>Acinetobacter tandoii</em> CW-1, was isolated from the <em>Microcystis</em>-attached microbiota in Lake Taihu. This strain demonstrated exceptional nitrogen removal capacities, achieving peak removal rates of 3.9 mg N L<sup>−1</sup> h<sup>−1</sup> for ammonium (NH<sub>4</sub><sup>+</sup>), 5.8 mg N L<sup>−1</sup> h<sup>−1</sup> for nitrate (NO<sub>3</sub><sup>−</sup>), and 2.5 mg N L<sup>−1</sup> h<sup>−1</sup> for nitrite (NO<sub>2</sub><sup>−</sup>). During operational optimization, strain CW-1 demonstrated efficient utilization of the organic carbon present in soybean processing wastewater (SW) under slightly acidic condition (pH 5.26). Notably, it maintained an ammonia removal efficiency of 48.5 % after 48 h of cultivation at 10 °C, indicating its functionality at low temperatures. Under the optimized conditions, 99.4 % of the NH<sub>4</sub><sup>+</sup> in the SW was removed within 48 h. Concurrently, 60.0 % of the Chemical Oxygen Demand and 28.0 % of the dissolved total phosphorus were also eliminated. Whole-genome sequencing revealed a multifunctional N-removal system in which NH<sub>4</sub><sup>+</sup> is eliminated via assimilation while NO<sub>3</sub><sup>−</sup> is removed through assimilatory nitrate reduction to ammonia. To our knowledge, this study represents the first successful utilization of an HN-AD strain for the treatment of SW, demonstrating the considerable potential of strain CW-1 in this field.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108728"},"PeriodicalIF":6.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096659","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

Application of three-dimensional structures of polylactic acid (PLA) impregnated with graphene oxide for adsorption of ibuprofen 氧化石墨烯浸渍聚乳酸（PLA）三维结构吸附布洛芬的研究

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-16 DOI: 10.1016/j.jwpe.2025.108672

Nicolle Ramos dos Santos , Gabriel Perina Gongora , Jumara Silva de Sousa , Maria Eliana Camargo Ferreira , Rosângela Bergamasco , Luis Fernando Cusioli

{"title":"Application of three-dimensional structures of polylactic acid (PLA) impregnated with graphene oxide for adsorption of ibuprofen","authors":"Nicolle Ramos dos Santos , Gabriel Perina Gongora , Jumara Silva de Sousa , Maria Eliana Camargo Ferreira , Rosângela Bergamasco , Luis Fernando Cusioli","doi":"10.1016/j.jwpe.2025.108672","DOIUrl":"10.1016/j.jwpe.2025.108672","url":null,"abstract":"<div><div>Growing environmental concerns are driving the development of sustainable engineering solutions. In this scenario, 3D printing and nanomaterials, like graphene oxide (GO), stand out. 3D printing enables layer-by-layer fabrication, often using polylactic acid (PLA), a biodegradable polymer. Meanwhile, nanomaterials, especially carbon-based structures, show great potential in adsorption processes due to their unique physicochemical properties.</div><div>This study developed a composite material of 1 % (<em>w</em>/w) GO in PLA, processed by 3D printing, for the removal of ibuprofen (IBP), dipyrone, and chloroquine. The support showed good performance with the removal of IBP, a common pharmaceutical contaminant in water. Graphene oxide, with its large surface area and negative charge, is a highly effective adsorbent. Batch tests under optimal adsorption conditions demonstrated that the composite removed up to 70 % of IBP with an adsorption capacity of 14.6 mg.g<sup>−1</sup> within 30 min, at a pH of 2, knowing that its pKa is 4.91, for improvement, in the isotherm with a temperature adjustment to 45 °C, this capacity increased to 25.9 mg.g<sup>−1</sup>, proving its strong adsorption capability.</div><div>These results underscore the potential of the GO+PLA composite as a sustainable and efficient adsorbent. Integrating nanotechnology with additive manufacturing paves the way for environmentally friendly water treatment solutions, contributing to greener, more sustainable environmental technologies.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108672"},"PeriodicalIF":6.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096654","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 nature-based solution to mitigate the impact of reclaimed water discharge into a river under water scarcity conditions 一个基于自然的解决方案，以减轻在缺水条件下再生水排放到河流中的影响

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-16 DOI: 10.1016/j.jwpe.2025.108719

Ana Agustin , Jordi Colomer , Manuela Hidalgo , Victòria Salvadó , Teresa Serra

{"title":"A nature-based solution to mitigate the impact of reclaimed water discharge into a river under water scarcity conditions","authors":"Ana Agustin , Jordi Colomer , Manuela Hidalgo , Victòria Salvadó , Teresa Serra","doi":"10.1016/j.jwpe.2025.108719","DOIUrl":"10.1016/j.jwpe.2025.108719","url":null,"abstract":"<div><div>Water scarcity in Mediterranean regions is a growing concern. Alternatives are necessary to meet the water demand from urban areas and to maintain ecological flows in rivers due to the decreased availability and the poor quality of water that is found during drought events. In these conditions, flow can be sustained through discharges from sewage plants. However, if river dilution factors are low, the discharges can endanger aquatic ecosystems. To mitigate these impacts, tertiary treatments are integrated into wastewater treatment plants to improve effluent quality. In this study, the impact of a wastewater treatment discharge in a river has been evaluated before and after the implementation of a nature-based tertiary treatment under different river dilution conditions. The water quality of the river as well as of the discharged effluent was assessed through the concentration of small-suspended sludge particles (d < 100 μm). The main findings of the manuscript were: (1) The concentration of small-suspended particles in the river, 50 m downstream the WWTP point of discharge was found to be lower, especially during periods with a low dilution factor, after the nature-based tertiary treatment was put in operation.</div><div>This was due to the effectiveness of the nature-based tertiary treatment in eliminating small particles (85.4 %) whereas large sludge particles (d > 100 μm) are also reduced (69.8 %) by sedimentation. (2) A predictive model to assess the impact of the treated wastewater discharge into the river was developed and calibrated. The model considers different percentages of water treated by the tertiary system in water scarcity scenarios.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108719"},"PeriodicalIF":6.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096658","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

Bicarbonate ions enhanced surface Fe(II) regeneration and peroxymonosulfate activation on stainless-steel scrubber cathode for BPA degradation 碳酸氢盐离子增强不锈钢洗涤器阴极表面铁（II）再生和过氧单硫酸盐活化降解双酚a

IF 6.7 2区工程技术

Journal of water process engineering Pub Date : 2025-09-16 DOI: 10.1016/j.jwpe.2025.108739

Danni Deng , Rong Chen , Qianqian Zhong , Binbin Xiong , Jia Deng , Na Zhang , Shiwei Xie

{"title":"Bicarbonate ions enhanced surface Fe(II) regeneration and peroxymonosulfate activation on stainless-steel scrubber cathode for BPA degradation","authors":"Danni Deng , Rong Chen , Qianqian Zhong , Binbin Xiong , Jia Deng , Na Zhang , Shiwei Xie","doi":"10.1016/j.jwpe.2025.108739","DOIUrl":"10.1016/j.jwpe.2025.108739","url":null,"abstract":"<div><div>Bicarbonate ions (HCO<sub>3</sub><sup>−</sup>), commonly present in natural water sources, exert complex influences on peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs). This study investigates the role of HCO<sub>3</sub><sup>−</sup> in a novel electrochemical system using a stainless-steel scrubber cathode (SSSC) for PMS activation. The buffering effect of HCO<sub>3</sub><sup>−</sup> shifts the dominant Fe(II) species from dissolved Fe<sup>2+</sup> ions to surface-bound Fe(II) (≡Fe(II)) within the HCO<sub>3</sub><sup>−</sup>/PMS/SSSC system. Furthermore, HCO<sub>3</sub><sup>−</sup> promotes ≡Fe(II)/≡Fe(III) redox cycling on the SSSC surface. These synergistic effects significantly enhance PMS activation, generating singlet oxygen (<sup>1</sup>O<sub>2</sub>) and Fe<sup>IV</sup><img>O as the primary oxidants responsible for BPA degradation. Identification of degradation intermediates elucidated two dominant pathways: hydroxylation and radical coupling. Toxicity assessment of these intermediates confirmed reduced environmental risks. The SSSC exhibited long-term stability and effective performance in real water matrices, demonstrating its practical applicability.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"78 ","pages":"Article 108739"},"PeriodicalIF":6.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096655","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