Water Research最新文献

{"title":"Improved ultrafiltration performance through dielectric barrier discharge/sulfite pretreatment: Effects of water matrices and mechanistic insights","authors":"Bing Zhang ,&nbsp;Jianpeng Li ,&nbsp;Xiaoping Wang ,&nbsp;Chi Zhang ,&nbsp;Wenjie Yin ,&nbsp;Bing Zhang ,&nbsp;Yu Qin ,&nbsp;Yanan Liu ,&nbsp;Wenxin Shi","doi":"10.1016/j.watres.2024.122755","DOIUrl":"10.1016/j.watres.2024.122755","url":null,"abstract":"<div><div>The feasibility of utilizing a dielectric barrier discharge (DBD)/sulfite-ultrafiltration system was investigated in various real water bodies, aiming to clarify the mechanism behind alleviating membrane fouling while synchronously degrading perfluorooctanoic acid (PFOA) during the treatment process of Yangtze River water. The results demonstrated that the DBD/sulfite pretreatment exhibited remarkable rates of membrane flux mitigation (&gt;84.10 %) and efficient degradation rates of PFOA (&gt;85.13 %), which decreased with increasing pH from 3.0 to 11.0. The presence of anions, cations, and natural organic matter slightly hindered the membrane fouling mitigation and PFOA degradation by quenching free radicals; however, the addition of SO₄²⁻ had a negligible impact. The mitigation of membrane fouling was attributed to the significant involvement of various radicals, including hydroxyl radical (•OH), sulfate radical (<span><math><msubsup><mtext>SO</mtext><mrow><mn>4</mn></mrow><mrow><mo>•</mo><mo>−</mo></mrow></msubsup></math></span>), electron (<span><math><mrow><msup><mrow><mi>e</mi></mrow><mo>−</mo></msup><msubsup><mrow><mo>/</mo><mi>e</mi></mrow><mrow><mtext>aq</mtext></mrow><mo>−</mo></msubsup></mrow></math></span>), su-peroxide anion radicals (<span><math><mrow><mo>•</mo><msubsup><mi>O</mi><mrow><mn>2</mn></mrow><mo>−</mo></msubsup></mrow></math></span>), and other radicals such as <span><math><msubsup><mtext>SO</mtext><mrow><mn>3</mn></mrow><mrow><mo>•</mo><mo>−</mo></mrow></msubsup></math></span>, exhibiting respective contributions of 33.25 %, 28.49 %, 20.56 %, 11.32 %, and 6.39 % in a synergistic redox effect. The pretreatment effectively reduced standard blocking and cake filtration fouling mechanisms by creating a sparse fouling layer on the membrane surface while increasing its roughness. Additionally, the main active species that played a significant role in the degradation of PFOA were identified as <span><math><msubsup><mtext>SO</mtext><mrow><mn>4</mn></mrow><mrow><mo>•</mo><mo>−</mo></mrow></msubsup></math></span>, •OH, and <span><math><msubsup><mi>e</mi><mrow><mtext>aq</mtext></mrow><mo>−</mo></msubsup></math></span>. These species contributed approximately 43.63 %, 24.39 %, and 20.65 % respectively to the degradation process. By employing mass spectrometry and density functional theory, a proposed pathway for PFOA degradation was established, effectively reducing the toxicity associated with its degradation byproducts. This study provides innovative insights into membrane-based water treatment technologies that effectively tackle both membrane fouling mitigation and PFOA degradation.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122755"},"PeriodicalIF":11.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579839","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":"Information-theoretic sensor placement for large sewer networks","authors":"George Crowley, Simon Tait, George Panoutsos, Vanessa Speight, Iñaki Esnaola","doi":"10.1016/j.watres.2024.122718","DOIUrl":"https://doi.org/10.1016/j.watres.2024.122718","url":null,"abstract":"Utility operators face a challenging task in managing wastewater networks to proactively enhance network monitoring. To address this issue, this paper develops a framework for optimized placing of sensors in sewer networks with the aim of maximizing the information obtained about the state of the network. To that end, mutual information is proposed as a measure of the evidence acquired about the state of the network by the placed sensors. The problem formulation leverages a stochastic description of the network states to analytically characterize the mutual information in the system and pose the sensor placement problem. To circumvent the combinatorial problem that arises in the placement configurations, we propose a new algorithm coined the one-step modified greedy algorithm, which employs the greedy heuristic for all possible initial sensor placements. This algorithm enables further exploration of solutions outside the initial greedy solution within a computationally tractable time. The algorithm is applied to two real sewer networks, the first is a sewer network in the South of England with 479 nodes and 567 links, and the second is the sewer network in Bellinge, a village in Denmark that contains 1020 nodes and 1015 links. Sensor placements from the modified greedy algorithm are validated by comparing their performance in estimating unmonitored locations against other heuristic placements using linear and neural network models. Results show the one-step modified greedy placements outperform others in most cases and tend to cluster sensors for efficiently monitoring parts of the network. The proposed framework and modified greedy algorithm provide wastewater utility operators with a sensor placement method that enables them to design the data acquisition and monitoring infrastructure for large networks.","PeriodicalId":443,"journal":{"name":"Water Research","volume":"241 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574580","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":"Charge as a key physicochemical factor in adsorption of organic micropollutants from wastewater effluent by rice husk bio-silica","authors":"Alba Rodriguez-Otero ,&nbsp;Selina Tisler ,&nbsp;Lisa M. Reinhardt ,&nbsp;Mathias B. Jørgensen ,&nbsp;Brice Bouyssiere ,&nbsp;Jan H. Christensen","doi":"10.1016/j.watres.2024.122748","DOIUrl":"10.1016/j.watres.2024.122748","url":null,"abstract":"<div><div>Wastewater treatment plants (WWTPs) often fail to fully remove organic micro-pollutants (OMPs), necessitating advanced treatment methods. This study examines the potential of an agricultural waste-derived adsorbent, rice husk (RH) – silica, for removing a complex mixture of 20 OMPs in MilliQ water and wastewater effluent. While RH-silica shows potential for OMP removal, its performance with multicomponent mixtures in real wastewater has yet to be investigated. Batch experiments demonstrated the efficacy of RH-silica in removing cationic, neutral, polar, and non-polar OMPs across various pH levels, with no adsorption of anionic OMPs. Column elution studies revealed that only positively charged compounds did not reach a breakthrough after 300 specific bed volumes (BVs), even when the filtration velocity was increased fivefold (3.8 m/h) and lower adsorbent-to-volume ratios (0.5 g/L) were employed. This indicates that electrostatic interactions via deprotonated silanol groups are the primary adsorption mechanism. RH-silica's ability to retain cationic pollutants regardless of their hydrophilicity degree highlights its potential as a novel adsorbent targeting positively charged persistent and mobile organic compounds (PMOCs). Moreover, the adsorption efficiency remained high in experiments with real wastewater effluent. Considering practical applications, a RH-silica column could be used to enhance removal of cationic polar compounds. This approach not only improves pollutant removal efficiency but also contributes to sustainability in WWTPs by using agricultural waste resources. Despite significant operational and end-of-life challenges for large-scale implementation, this study represents a crucial advancement in the investigation of RH-silica as an adsorbent.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122748"},"PeriodicalIF":11.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574579","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":"Structure-selectivity relationship of anion exchange resins with different quaternary amine functional groups for highly selective removal of PFAS from chromium-plating wastewater","authors":"Xiangzhe Jiang ,&nbsp;Yihua Luo ,&nbsp;Shuang Mu ,&nbsp;Bojiang Meng ,&nbsp;Wei Wang ,&nbsp;Gang Yu ,&nbsp;Shubo Deng","doi":"10.1016/j.watres.2024.122749","DOIUrl":"10.1016/j.watres.2024.122749","url":null,"abstract":"<div><div>Anion exchange resin (AER) adsorption is an effective technology for the removal of per- and polyfluoroalkyl substances (PFAS) from wastewater. However, existing AERs with tributylamine functional groups have poor adsorption selectivity for perfluorinated carboxylic acids (PFCAs) and 6:2 fluorotelomer sulfonate (6:2 FTS), and the structure-selectivity relationship is still unclear. In this study, several novel gel AERs with long-chain amine groups were prepared. It was found that their adsorption selectivity for 6:2 FTS was 3.3–5.1 times that of commercial AERs, and the adsorption amount for 6:2 FTS in chromium-plating wastewater was 2.1 times that of the commercial PFA694E. On this basis, we synthesized 16 AERs with different quaternary amine functional groups, and explored the structure-selectivity relationship through the selectivity coefficients and adsorption energies of different AERs for seven typical PFAS. The order of adsorption selectivity of AERs with different quaternary amine groups for PFAS was AER-(12–1-1) &gt; AER-(8–1-1) &gt; AER-(4–4-4) &gt; AER-(4–1-1) ≈ AER-(2–2-2) &gt; AER-(1–1-1), where the three numbers are the carbon-chain lengths of the three alkyl groups attached to the nitrogen atom of the quaternary amine group. Density functional theory (DFT) calculations confirmed the enhanced adsorption selectivity and contribution of both non-electrostatic and electrostatic interactions by the long-chain amine groups, and a quantitative relationship between theoretical calculations and experimental results was established. These results could provide guidance for the development of efficient adsorbents for PFAS removal from wastewater.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122749"},"PeriodicalIF":11.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579916","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":"Consequential life cycle assessment of urban source-separating sanitation systems complementing centralized wastewater treatment in Lund, Sweden","authors":"Abdulhamid Aliahmad ,&nbsp;Priscila de Morais Lima ,&nbsp;Hamse Kjerstadius ,&nbsp;Prithvi Simha ,&nbsp;Björn Vinnerås ,&nbsp;Jennifer McConville","doi":"10.1016/j.watres.2024.122741","DOIUrl":"10.1016/j.watres.2024.122741","url":null,"abstract":"<div><div>This study examined various source-separating sanitation systems to evaluate their environmental performance, providing decision-makers with insights for selecting an appropriate system for a newly developed neighborhood in Sweden. A full consequential LCA was conducted to account for resource recovery and substitution. The local wastewater treatment plant WWTP was modeled as a reference. Secondly, a urine recycling system was introduced to treat 75 % of the collected urine, with the remainder piped to the WWTP. Thirdly, a black and greywater (BW&amp;GW) treatment system handling all generated wastewater was examined. Finally, a hybrid source-separating system combining urine, black, and greywater was investigated. The results indicated that the four scenarios exhibited global warming potentials (GWP) of 78, 62, 32, and 24 kg CO2-eq per PE/ y. Recycling urine as fertilizer led to a 20 % reduction in the GWP of the reference. It also reduced other impact categories, with a 55 %, 65 %, and 45 % reduction in eutrophication, ozone depletion, and acidification, respectively. The BW&amp;GW system achieved a 60 % reduction over the reference GWP, mainly due to fertilizer, biogas, and cleanwater recovery. Integrating urine, black, and greywater recycling in the final scenario achieved a 25 % reduction compared to the BW&amp;GW scenario, primarily due to lowering of the ammonia stripping GWP and the additional fertilizer recovery. Based on sensitivity analyses, switching citric acid for sulfuric acid reduced the GWP of the urine stabilization unit process by 101 %, from 15.47 to -0.14 kg CO2-eq per PE/ y. Ultimately, the findings suggest that the fully decentralized source-separating sanitation system incorporating urine, blackwater, and greywater recycling, particularly when combined with 70 % energy recovery at the urine concentrator, is most favorable.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122741"},"PeriodicalIF":11.4,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}

{"title":"Unveiling industrial emissions in a large European river: Insights from data mining of high-frequency measurements","authors":"Teofana Chonova, Steffen Ruppe, Ingrid Langlois, Dorrit S. Griesshaber, Martin Loos, Mark Honti, Kathrin Fenner, Heinz Singer","doi":"10.1016/j.watres.2024.122745","DOIUrl":"https://doi.org/10.1016/j.watres.2024.122745","url":null,"abstract":"Despite the tremendous efforts to improve river water quality, chemical contamination remains a significant issue. Besides well-known contaminants, in recent years, pollutants of industrial origin received increasing attention because of the huge knowledge gap regarding their occurrence, fate and environmental risks. Moreover, such pollutants often exhibit high concentration fluctuations over time, which makes them less predictable and measurable with classical short-time campaigns.This study provides insights into the different sources of chemical contamination of the Rhine River based on temporal high-frequency LC-HRMS monitoring data from a single location. A newly developed prioritization strategy selected nearly 3000 substances as potentially major contaminants. A novel classification analysis based on temporal behavior identified 53% of these compounds (accounting for 62% of the time-integrated intensity recorded in the dataset) as originating from irregular emission sources. Irregular emissions can originate from industrial production cycles. After delimiting other potential irregular sources, we have strong evidence indicating that a considerable share of the irregular emissions likely comes from industrial activities. This finding is supported by the structural elucidation of sixteen irregularly emitted substances, for which the industrial origin was successfully confirmed. Those compounds include 3-chloro-5-(trifluoromethyl)pyridine-2-carboxylic acid and 4-(dimethylamino)-2,2-diphenylpentanenitrile. In addition, 40 other compounds exhibited temporal emission patterns similar to the sixteen industrial compounds, which strongly suggests a common contamination source. Finally, 100 top-ranking compounds were selected for further structural elucidation and emission reduction measures. The computational approach outlined within this study can be effectively applied in other large river catchments to identify unknown contaminants stemming from industrial sources.","PeriodicalId":443,"journal":{"name":"Water Research","volume":"87 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574603","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":"A novel Cu/Fe cathode prepared by a facile redox pathway for phenol degradation electrocatalytically via the electro-fenton assisted electro-chlorination process","authors":"YeXin Liang ,&nbsp;Mingzhe Yuan ,&nbsp;Haimei Cheng ,&nbsp;Haiqin Lv ,&nbsp;Lei Zhao ,&nbsp;JiaLi Tang ,&nbsp;Yong Feng ,&nbsp;Ying Huang ,&nbsp;Qingguo Meng","doi":"10.1016/j.watres.2024.122744","DOIUrl":"10.1016/j.watres.2024.122744","url":null,"abstract":"<div><div>Electrochemical methods for treating phenolic wastewater have been widely studied, with most research focusing primarily on the anode, while the cathode has generally served as a counter electrode. This study aims to enhance the electrocatalytic process by developing a new Fe/Cu-based cathode using a simple redox method. We created a CuO<img>Cu@Fe-Fe₂O_3-x (0 &lt; <em>x</em> &lt; 1, combining Fe₂O₃ and FeO) electrode, referred to as CCFFO, to facilitate the electro-Fenton process without requiring additional H₂O₂ or Fe²⁺. In our electrolysis system with NaCl as the electrolyte for electro-chlorination process, phenol concentration was reduced from 100 mg/L to below 0.5 mg/L within 10 min. Optimal experimental conditions were determined by evaluating various parameters such as chloride electrolyte concentration, current density, electrode plate spacing, aeration, pH, and cathode types. Additionally, the role of chloride ions in phenol degradation was investigated through free radical quenching experiments. A 500-hour continuous flow experiment demonstrated the durability of the CCFFO cathode. GC/MS analysis identified intermediates formed during phenol degradation and the underlying catalytic mechanism was explored. The results indicate that the electro-chlorination process at the anode is the primary driver of phenol degradation, assisted by the electro-Fenton process on the CCFFO cathode. The CCFFO cathode effectively prevents the production of harmful by-products like perchlorate. The degradation efficiencies of chemical oxygen demand (COD) and total organic carbon (TOC) were 63.5 % and 80.25 %, respectively. Achieving a phenol degradation efficiency of 99.5 % within 10 min, the CCFFO cathode and electrolytic system show significant potential for wastewater treatment applications.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122744"},"PeriodicalIF":11.4,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574604","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":"Urban sewage discharge of neonicotinoids and their transformation products threatens aquatic organisms","authors":"Yingying Yang ,&nbsp;Qing Zhang ,&nbsp;Yilin Xiao ,&nbsp;Yu Xiao ,&nbsp;Hui Gao ,&nbsp;Shangwei Zhang ,&nbsp;Adrian Covaci ,&nbsp;Xinghui Xia","doi":"10.1016/j.watres.2024.122740","DOIUrl":"10.1016/j.watres.2024.122740","url":null,"abstract":"<div><div>Neonicotinoid insecticides (NEOs) are frequently used for urban landscape management and vector control, and undergo various transformation processes when release into urban environments. The discharges of NEOs and their transformation products (TPs) from urban sewer networks may pose serious threats to freshwater ecosystem integrity. However, TPs of NEOs present in municipal wastewater treatment plants (MWWTPs) and their associated risks to aquatic organisms are largely unknown. Here, we investigate NEOs and their TPs in 28 MWWTPs of six Chinese cities. Eleven NEOs and 33 TPs were identified, and 17 TPs were firstly detected in environmental medium. Considerable concentrations of NEOs and their TPs (17.0–1543 ng/L) were measured in the effluents, and two NEOs exceeded the ecological quality reference values in 32.1 % (for clothianidin) and 78.6 % (for imidacloprid) of the effluents. Simultaneously, 12 TPs had a higher regulatory priority than the corresponding NEOs in at least one aquatic organism using a toxicological priority index. Furthermore, 79.5 % of NEOs and their TPs exhibited high persistence and mobility, and thus these compounds could readily spread over long distances in aquatic environment. This study highlights that the input of NEOs and their TPs from treated wastewater into aquatic ecosystem should be regulated to mitigate the ecological risks.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122740"},"PeriodicalIF":11.4,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566017","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":"Establishment of continuous flow partial denitrification biofilm module with short hydraulic retention time","authors":"Juan Feng ,&nbsp;Ji Zhao ,&nbsp;Han Xiang ,&nbsp;Zhipeng You ,&nbsp;Liangliang Shi ,&nbsp;Zhengda Yu ,&nbsp;Yanling Qiu ,&nbsp;Deshuang Yu ,&nbsp;Xiaoxia Wang","doi":"10.1016/j.watres.2024.122743","DOIUrl":"10.1016/j.watres.2024.122743","url":null,"abstract":"<div><div>Partial denitrification (PD) can supply essential nitrite (NO₂^-) and is supposed to promote the application of Anammox. However, PD-related research mainly involves sequencing batch reactors and activated sludge. Here, we proposed establishing PD in a continuous-flow submerged biofilm module (PD-BfM). Benefiting from employing anoxic starvation treatment to quickly start PD and transferring enriched functional bacteria onto biofilms in time, the preparation work of PD-BfM was completed within a quite short period of 21 days. With the hydraulic retention time adjusted to 50 min, PD-BfM demonstrated an impressive efficiency in generating NO₂^-, achieving a nitrate-to-nitrite transformation ratio of over 75 %, even at the influent chemical oxygen demand to nitrate ratio of 4 condition. Meanwhile, the dominant genus in the biofilms was shifted from <em>Thauera</em> to <em>Flavobacterium</em> and Comamonadaceae family members. The gradient of substrate concentrations also possibly differentiated microbial communities between the top and bottom bio-carriers.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122743"},"PeriodicalIF":11.4,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566018","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":"Sulfate-driven microbial collaboration for synergistic remediation of chloroethene-heavy metal pollution","authors":"Zheng-Tao Li,&nbsp;He-Ping Zhao","doi":"10.1016/j.watres.2024.122738","DOIUrl":"10.1016/j.watres.2024.122738","url":null,"abstract":"<div><div>The treatment of heavy metal(loid) (HM) composite pollution has long posed a challenge for the bioremediation of organohalide-contaminated sites. Given the prevalent cohabitation of sulfate-reducing bacteria (SRB) with organohalide-respiring bacteria (OHRB), we proposed a sulfate-amendment strategy to achieve synergistic remediation of trichloroethene and diverse HMs [50μM of As(III), Ni(II), Cu(II), Pb(II)]. Correspondingly, 50–75 μM sulfate was introduced to HM inhibitory batches to investigate the enhancement effect of sulfate amendment on bio-dechlorination. Dechlorination kinetics and MATLAB modeling indicated that sulfate amendment comprehensively improved the reductive dechlorination performance in the presence of As(III), Ni(II), Pb(II) and mixed HMs, while no enhancement was observed under Cu(II) exposure. Additionally, sulfate introduction effectively accelerated the detoxification of Ni(II), Pb(II), Cu(II), and As(III), achieving removal efficiencies of 76.87 %, 64.01 %, 86.37 %, and 95.50 % within the first three days, respectively. Meanwhile, propionate dynamics and acetogenesis indicated enhanced carbon source and e-donor supply. 16S rRNA gene sequencing and metagenomic analysis results demonstrated that HM sequestration was accomplished jointly by SRB and HM-resistant bacteria via extracellular precipitation (metal sulfide) and intracellular sequestration, while their contribution depended on the specific coexisting HM species present. This study highlights the critical role of sulfate in the concurrent bioremediation of HM-organohalide composite contamination and provides insights for developing a cost-effective <em>in-situ</em> bioremediation strategy.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122738"},"PeriodicalIF":11.4,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566014","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}