Environmental Science: Water Research & Technology最新文献

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In situ dopamine-driven copper nanoparticle-/thiol-modified superhydrophobic ceramic membranes for oil–water separation and membrane contamination control† 原位多巴胺驱动的纳米铜/硫醇修饰的超疏水陶瓷膜用于油水分离和膜污染控制
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-04-22 DOI: 10.1039/D5EW00159E
Longjun Wang, Yonggang Li, Jingwen Zhou, Zhuolin Han, Pengcheng Liu, Xiquan Cheng and Kai Wang
{"title":"In situ dopamine-driven copper nanoparticle-/thiol-modified superhydrophobic ceramic membranes for oil–water separation and membrane contamination control†","authors":"Longjun Wang, Yonggang Li, Jingwen Zhou, Zhuolin Han, Pengcheng Liu, Xiquan Cheng and Kai Wang","doi":"10.1039/D5EW00159E","DOIUrl":"https://doi.org/10.1039/D5EW00159E","url":null,"abstract":"<p >To achieve efficient separation of water-in-oil emulsions and to mitigate the issue of easy contamination of conventional ceramic membranes (CMs), modifying CM surface from being hydrophilic to being superhydrophobic is a feasible strategy, thereby improving the separation selectivity and anti-fouling ability of CM. In this study, using dopamine's (DA) self-polymerization and adhesive qualities on various substrate surfaces, a polydopamine (PDA) coating was applied to a ceramic membrane's surface. Using the reducibility of DA, copper ions (Cu<small><sup>2+</sup></small>) were reduced to copper nanoparticles (Cu NPs) <em>in situ</em> to construct microstructures on the surface of CM. Finally, the HDT-Cu-PDA-CM superhydrophobic composite film was prepared <em>via</em> the coordination reaction of alkyl mercaptan (HDT) and a metal to realize the grafting of low surface energy substances. Results indicated that the surface roughness of the ceramic membrane increased from 2.7576 μm to 3.4913 μm after introducing Cu NPs. The water contact angle (WCA) of the modified HDT-Cu-PDA-CM composite membrane was 152°, and the separation efficiency of water-in-oil emulsions (<em>n</em>-octane, dichloromethane and toluene) was above 99%. Kinetic analysis of the membrane contamination showed that HDT-Cu-PDA-CM ceramic membrane exhibited strong resistance to contamination. After solvent resistance tests in different organic solvents and acidic and alkaline wastewaters, HDT-Cu-PDA-CM ceramic membrane maintained its superhydrophobicity, emulsion separation efficiency to more than 99%, and excellent solvent resistance. This study offers a novel strategy for the hydrophobic modification of a CM surface using dopamine by <em>in situ</em> reducing the metal nanoparticles on the surface of CM to increase its roughness, followed by grafting alkyl mercaptan.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 7","pages":" 1681-1690"},"PeriodicalIF":3.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Elucidating the impact of common stormwater pollutants on antibiotic resistance: the role of heavy metals, nutrients, and salts† 阐明常见雨水污染物对抗生素耐药性的影响:重金属、营养物和盐的作用†
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-04-22 DOI: 10.1039/D5EW00032G
Kassidy O'Malley, Patrick McNamara and Walter McDonald
{"title":"Elucidating the impact of common stormwater pollutants on antibiotic resistance: the role of heavy metals, nutrients, and salts†","authors":"Kassidy O'Malley, Patrick McNamara and Walter McDonald","doi":"10.1039/D5EW00032G","DOIUrl":"https://doi.org/10.1039/D5EW00032G","url":null,"abstract":"<p >Antibiotic resistance poses a significant global health threat, and the urban water cycle presents an opportunity to augment or limit the spread of antibiotic resistance. In particular, stormwater runoff has recently been revealed as a key conduit for antibiotic-resistant bacteria (ARB). The specific role of stormwater pollutants, however, on antibiotic resistance has not been isolated. Understanding the impact of specific pollutants common to stormwater could help optimize design and operation of stormwater systems for management of antibiotic resistance. The objective of this research was to establish the potential contributions of common stormwater pollutants to antibiotic resistance proliferation. Lab-scale stormwater microcosms were amended with either heavy metals, nutrients, or salts, and then ARB and antibiotic resistance gene (ARG) concentrations were quantified over a seven-day period. The microcosm experiments revealed that heavy metals (5–1000 μg L<small><sup>−1</sup></small>) on average significantly increased (<em>p</em> &lt; 0.05) ARGs and ARB concentrations 0.30 log and 0.96 log, respectively, and the effects were dependent on the concentration of the metal. Total bacterial counts increased by 174% in nutrient-amended microcosms, while ARG levels remained statistically unchanged (<em>p</em> &gt; 0.05). Salts, a common pollutant in colder climates, exhibited no impact. Moving forward, targeted interventions focusing on heavy metal removal, alongside careful stormwater treatment design, could offer promising avenues for addressing antibiotic resistance dissemination in urban environments.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 7","pages":" 1657-1667"},"PeriodicalIF":3.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Dynamic mechanisms of biocide-mediated biofouling control in two-stage RO systems in wastewater reclamation: efficacy and microbial adaptation† 两级反渗透系统中杀菌剂介导的生物污染控制的动态机制:效果和微生物适应
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-04-17 DOI: 10.1039/D5EW00057B
Haibo Gao, Liang Xiong, Yangzhou Su, Qiang Liu, Xiaolei Zhang and Ping Yao
{"title":"Dynamic mechanisms of biocide-mediated biofouling control in two-stage RO systems in wastewater reclamation: efficacy and microbial adaptation†","authors":"Haibo Gao, Liang Xiong, Yangzhou Su, Qiang Liu, Xiaolei Zhang and Ping Yao","doi":"10.1039/D5EW00057B","DOIUrl":"https://doi.org/10.1039/D5EW00057B","url":null,"abstract":"<p >This study investigates the role of biocides in mitigating biofouling during the onsite operation of a two stage reverse osmosis (RO) system for chemical engineering wastewater reclamation. A laboratory scale fouling mimic system was employed to simulate filtration performance under different dosages of a commercial biocide methylisothiazolinone (MIT). The introduction of MIT (5 mg L<small><sup>−1</sup></small>) to the feedwater of the first and second stage RO processes resulted in a limited alleviation of flux decline (8–14% flux improvement) in the early stages of filtration (&lt;6 days), and the effectiveness diminished as filtration progresses. The higher dosage of MIT (5 mg L<small><sup>−1</sup></small>) for both the first and second stage RO led to greater inhibition on bacterial growth, microbial organic matter secretion and reduced signaling molecule production on the membrane surface compared with those for lower dosage of biocide (2 mg L<small><sup>−1</sup></small>). High-throughput sequencing revealed that the biocide reduced bacterial diversity in the early filtration stages and suppressed the enrichment of biofilm forming bacteria (<em>e.g.</em>, <em>Proteobacteria Amb-16S-1323</em> and <em>Limnobacter</em>) on the membrane surface of both RO stages. However, salt and biocide tolerant resistant bacteria (<em>e.g.</em>, <em>Patescibacteria</em>, <em>Methyloversatilis</em> and <em>Microbacteriaceae</em>) progressively adapted to the conditions, becoming dominant in the fouling layer and contributing to the formation of dense biofilms. Fouling layers treated with low-dose biocide exhibited higher bacterial diversity compared to those treated with a higher dose, which could cause its low biofouling control efficiency. Correlation analysis indicated that flux decline was positively correlated with biofilm-related parameters, such as bacterial counts, organic matter content, and quorum sensing molecules present in the fouling layers of both stages of RO, suggesting that biofouling played crucial roles in flux decline. The feedwater bacterial count was the most critical parameter contributing to the flux decline of both stages of RO, suggesting the significance of controlling bacterial load to dual stage RO systems. The findings of this study could provide scientific and technical basis for dealing with biofouling in two stage RO systems for wastewater reclamation.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 7","pages":" 1758-1769"},"PeriodicalIF":3.5,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
In situ sequestration of per- and polyfluoroalkyl substances in aquifer materials using polydiallyldimethyl ammonium chloride-stabilized powdered activated carbon† 利用聚二烯基二甲基氯化铵稳定粉末活性炭†对含水层材料中的单氟烷基和多氟烷基物质进行原位固存
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-04-17 DOI: 10.1039/D4EW00752B
William M. Longo, Sneha Sinha, Mito Imagawa, William A. Arnold, James Hatton, Kurt D. Pennell and Matt F. Simcik
{"title":"In situ sequestration of per- and polyfluoroalkyl substances in aquifer materials using polydiallyldimethyl ammonium chloride-stabilized powdered activated carbon†","authors":"William M. Longo, Sneha Sinha, Mito Imagawa, William A. Arnold, James Hatton, Kurt D. Pennell and Matt F. Simcik","doi":"10.1039/D4EW00752B","DOIUrl":"https://doi.org/10.1039/D4EW00752B","url":null,"abstract":"<p >The widespread use of aqueous film-forming foams (AFFF) for firefighting and fire fighter training activities has led to groundwater contamination with per- and polyfluoroalkyl substances (PFAS). PFAS can be effectively sorbed onto powdered activated carbon (PAC) and the aqueous cationic polymer, polydiallyldimethyl ammonium chloride (PDM). These sorbents form a stable suspension (S-PAC) that can be injected into the subsurface to create a permeable adsorptive barrier (PAB), providing the basis for field-scale <em>in situ</em> PFAS sequestration. A series of bench-scale one-dimensional column experiments were performed to assess the transport and sorption of PFAS in aquifer materials from two field sites with PFAS-contaminated groundwater. Experiments included testing the effect of pre-treatment with PDM and sequential injections of individual PFAS and mixtures. In all experiments, S-PAC enhanced PFAS sorption on site media from &gt; 2-fold (<em>e.g.</em> perfluorohexanoic acid) to &gt; 100-fold (<em>e.g.</em> perfluorooctane sulfonic acid) depending on headgroup, chain length, and influent concentration. Pretreatment of influent with PDM alone increased total PFAS sorption for compounds with sulfonic acid and sulfonamido headgroups by up to ∼2-fold relative to S-PAC treatment without PDM pretreatment. Results also demonstrated competition for sorption sites with long-chain PFAS displacing shorter chain length PFAS from the S-PAC, an effect that can potentially be addressed by expanding the treatment zone. S-PAC is a viable treatment for <em>in situ</em> sequestration of PFAS and upstream injection of PDM may enhance removal. Competitive displacement by more strongly sorbed PFAS should be a design consideration when implementing this technology in the field.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 6","pages":" 1527-1541"},"PeriodicalIF":3.5,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144171176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Evaluating the feasibility of creating a zero waste discharge aquaculture system† 评价建立零废物排放水产养殖系统的可行性
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-04-08 DOI: 10.1039/D4EW01080A
N. A. Oladoja, J. A. Ogunniyi, Y. I. Bulu, R. O. A. Adelagun, M. O. Alfred and E. I. Unuabonah
{"title":"Evaluating the feasibility of creating a zero waste discharge aquaculture system†","authors":"N. A. Oladoja, J. A. Ogunniyi, Y. I. Bulu, R. O. A. Adelagun, M. O. Alfred and E. I. Unuabonah","doi":"10.1039/D4EW01080A","DOIUrl":"https://doi.org/10.1039/D4EW01080A","url":null,"abstract":"<p >Aquaculture operations are synonymous with high freshwater consumption, followed by the discharge of large volumes of heavily contaminated wastewater. The freshwater consumption stresses clean water resources, and the discharge of contaminated wastewater induces ecological imbalance. Therefore, there is a crucial need to promote the concept of resource efficiency <em>via</em> wastewater management practice that supports the purification of nutrient-rich aquaculture wastewater (AQW) for reuse and nutrient recovery for agricultural use. Herein, the synergistic effects of the combination of primary coagulants (<em>i.e.</em>, <em>Moringa oleifera</em> (MO) and chitosan (CH)) with a coagulant aid (<em>i.e.</em>, thermally treated shell of a gastropod (GS)) was evaluated for AQW purification and nutrient recovery. From the determination of the optimum coagulant and coagulant aid dosages, two different coagulant–coagulant aid (C–CA) combinations (<em>i.e.</em>, MO–GS and CH–GS) were prepared and comparatively assessed with the respective precursors for the AQW wastewater purification. The settled flocs were harvested and evaluated for the fertilizer values and nutrient releasing profiles and patterns. The coagulant aid produced water with the highest turbidity removal efficiency (98.8%), but the need to moderate the extreme pH value (12.1) of the produced treated water prompted the combination with different coagulants to produce the C–CA combination. The physicochemical characteristics of the dried harvested flocs (DHF) were comparable with those of the commercial fertilizers. All DHF samples showed a delayed TP release, fast TN release, and different modes and rates of nutrient release. The mode of nutrient release was similar in the C–CA combination, as they were best described by the Baker Lonsdale nutrient release kinetic model. Field application simulation and process safety evaluation are recommended to ensure a smooth transition from the bench scale to real-life applications.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1325-1338"},"PeriodicalIF":3.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
A highly sensitive disposable electrochemical sensor based on copper nanoparticles for pesticide imidacloprid determination in contaminated water sources† 基于铜纳米粒子的高灵敏度一次性电化学传感器用于污染水源中农药吡虫啉的测定
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-04-08 DOI: 10.1039/D4EW00829D
Julia Oliveira Fernandes, Cassiano Augusto Rolim Bernardino, Maria Carolina da Costa Marques, Octavio Pereira Lopes de Souza, Claudio Fernando Mahler, Bernardo Ferreira Braz, Ricardo Erthal Santelli, Thiago da Cruz Canevari and Fernando Henrique Cincotto
{"title":"A highly sensitive disposable electrochemical sensor based on copper nanoparticles for pesticide imidacloprid determination in contaminated water sources†","authors":"Julia Oliveira Fernandes, Cassiano Augusto Rolim Bernardino, Maria Carolina da Costa Marques, Octavio Pereira Lopes de Souza, Claudio Fernando Mahler, Bernardo Ferreira Braz, Ricardo Erthal Santelli, Thiago da Cruz Canevari and Fernando Henrique Cincotto","doi":"10.1039/D4EW00829D","DOIUrl":"https://doi.org/10.1039/D4EW00829D","url":null,"abstract":"<p >The study aimed to develop a new electrochemical sensor based on a screen-printed carbon electrode modified with copper nanoparticles (SPE/CuNPs) to determine imidacloprid (IMI) pesticide in environmental samples. The sensor's structural characterization and electrochemical performance were assessed through high-resolution transmission electron microscopy and ultraviolet–visible spectroscopy, electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry. The results indicated that the SPE/CuNPs exhibited a porous and rough surface morphology, which enhances the adsorption of chemical species at the electrode/solution interface. Furthermore, the incorporation of copper nanoparticles significantly improved the sensor's sensitivity. The sensor displayed high sensitivity and selectivity for detecting IMI, with a detection limit of 10.8 nmol L<small><sup>−1</sup></small> and a linear response range of 0.059 to 0.516 μmol L<small><sup>−1</sup></small>, highlighting its robust analytical performance in environmental sample analysis.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 6","pages":" 1517-1526"},"PeriodicalIF":3.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144171175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Improvement of sludge dewatering by calcium peroxide activated with pyrite: performances, mechanisms and implications† 黄铁矿活化过氧化钙改善污泥脱水:性能、机理及意义
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-04-03 DOI: 10.1039/D4EW00915K
Jinyun Chen, Xiaoshuang Liu, Ziheng Dai, Lei Liu, Yuhan Fan, Weiqi Liu and Liguo Zhang
{"title":"Improvement of sludge dewatering by calcium peroxide activated with pyrite: performances, mechanisms and implications†","authors":"Jinyun Chen, Xiaoshuang Liu, Ziheng Dai, Lei Liu, Yuhan Fan, Weiqi Liu and Liguo Zhang","doi":"10.1039/D4EW00915K","DOIUrl":"https://doi.org/10.1039/D4EW00915K","url":null,"abstract":"<p >This study proposed a novel sludge conditioning technology using calcium peroxide (CaO<small><sub>2</sub></small>) activated with pyrite for improving the dewaterability of waste activated sludge (WAS). The results showed that the water content of the sludge cake decreased from 93.33% to 90.80%, and the SCST decreased to 0.52 at the optimal conditioning (pyrite dose of 32.61 mg g<small><sub>TS</sub></small><small><sup>−1</sup></small>, CaO<small><sub>2</sub></small> dose of 30 mg g<small><sub>TS</sub></small><small><sup>−1</sup></small>). Furthermore, a comprehensive investigation indicated that the underlying mechanism of dewaterability improvement can be attributed to the transformations of extracellular polymeric substances (EPS). The results of the FTIR protein secondary structure and interfacial free energy showed that combined conditioning enhanced the hydrophobicity of the sludge. In addition, the repulsive force of sludge particles and the bound water content in sludge flocs both decreased after conditioning based on the results of zeta potential and potential barriers. Overall, these findings provided theoretical insights into the role of EPS in dewaterability improvement and an alternative sludge conditioning scheme.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1186-1199"},"PeriodicalIF":3.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Research advancements in the treatment of wastewater containing pollutants in printed circuit board production† 印刷电路板生产中含污染物废水处理的研究进展
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-04-02 DOI: 10.1039/D4EW00827H
Zicheng Zeng, Lei Huang, Guoqing Wu, Meng Li, Hongyu Wang, Meng Zhao and Hongguo Zhang
{"title":"Research advancements in the treatment of wastewater containing pollutants in printed circuit board production†","authors":"Zicheng Zeng, Lei Huang, Guoqing Wu, Meng Li, Hongyu Wang, Meng Zhao and Hongguo Zhang","doi":"10.1039/D4EW00827H","DOIUrl":"https://doi.org/10.1039/D4EW00827H","url":null,"abstract":"<p >With the increasing demand for electronic equipment, the production of essential components and printed circuit boards has surged, generating a substantial volume of industrial wastewater. This wastewater contains heavy metals such as copper and nickel, as well as significant amounts of organic pollutants like black oil, dry film, and wet film. It must undergo treatment before being discharged into the environment. As a result, this paper categorizes printed circuit board wastewater into seven classifications, outlines various treatment methods, and specifically focuses on the removal of copper and its complexes through techniques such as chemical precipitation, adsorption, electrodeposition and advanced oxidation. By providing an in-depth analysis, this paper aims to offer valuable insights for the treatment of wastewater generated in the printed circuit board manufacturing process.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1038-1058"},"PeriodicalIF":3.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Novel fluidized-bed bioreactors with density-graded carriers for the bioremediation of nitrate in uranium industry effluents 新型密度梯度载体流化床生物反应器对铀工业废水中硝酸盐的生物修复
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-03-31 DOI: 10.1039/D5EW00077G
Mariano Venturini, Paula Bucci and Raúl Muñoz
{"title":"Novel fluidized-bed bioreactors with density-graded carriers for the bioremediation of nitrate in uranium industry effluents","authors":"Mariano Venturini, Paula Bucci and Raúl Muñoz","doi":"10.1039/D5EW00077G","DOIUrl":"https://doi.org/10.1039/D5EW00077G","url":null,"abstract":"<p >This study presents an innovative bioreactor system that employs density-graded floating carriers to effectively remediate complex uranium-contaminated effluents generated by the nuclear industry. By combining the advantages of fixed-bed and fluidized-bed reactors, our system utilizes floating carriers to create a stratified biofilm environment, optimizing biomass retention and mass transfer. Controlled redox potential (ORP) enhances the removal of uranium and associated contaminants, especially in effluents with high-nitrate concentrations. The fluidized-bed configuration, with a high carrier load, minimizes biofilm-induced clogging, ensuring sustained performance. Carriers were synthesized with acrylate polymers in different compositions: HEMA 50%/0 AA, HEMA 50%/25% AA and HEMA 50%/50% AA w/w to obtain different hydrodynamic properties. The particle terminal velocities and drag coefficients of carriers were 3.14 × 10<small><sup>−6</sup></small> m s<small><sup>−1</sup></small>, 5 × 10<small><sup>−5</sup></small> m s<small><sup>−1</sup></small>, and 2 × 10<small><sup>−4</sup></small> m s<small><sup>−1</sup></small> and 661 976, 20 734, and 26 221, respectively. The system achieved nitrate and COD removal efficiencies of up to 90% and 84%, respectively, at a hydraulic retention time of 23.9 h and with low energy consumption. The system behaved like a fluidized bed with a high carrier load similar to the PBBR, showing piston flux and variable column fluidization based on carrier densities. Frictions and collisions prevented clogging due to biofilm formation, ensuring sustained performance.</p>","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":" 5","pages":" 1339-1351"},"PeriodicalIF":3.5,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ew/d5ew00077g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In situ catalytic membrane technology for antifouling and sustainable landfill leachate management† 用于防污和可持续垃圾渗滤液管理的原位催化膜技术
IF 3.5 4区 环境科学与生态学
Environmental Science: Water Research & Technology Pub Date : 2025-03-28 DOI: 10.1039/D5EW00081E
Zhongsen Yan, Zihan Tang, Yongyuan Wang, Yuling Jiang, Haiqing Chang, Juxiang Jin, Yujia Peng and Fangshu Qu
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