In Wilkerson and Rosario-Ortiz (2021), the author contributions information was missing in the original published article. The Author Contributions section is provided below:
AUTHOR CONTRIBUTIONS
Fernando Rosario-Ortiz: Conceptualization; data curation; formal analysis; supervision; funding acquisition; investigation; methodology; writing-original draft; project administration; writing-review and editing. Paul Jeffrey Wilkerson: Data curation; formal analysis; writing-original draft; writing-review and editing.
{"title":"Impact of simulated wildfire on disinfection byproduct formation potential","authors":"","doi":"10.1002/aws2.1304","DOIUrl":"10.1002/aws2.1304","url":null,"abstract":"<p>In Wilkerson and Rosario-Ortiz (<span>2021</span>), the author contributions information was missing in the original published article. The Author Contributions section is provided below:</p><p><b>AUTHOR CONTRIBUTIONS</b></p><p><b>Fernando Rosario-Ortiz:</b> Conceptualization; data curation; formal analysis; supervision; funding acquisition; investigation; methodology; writing-original draft; project administration; writing-review and editing. <b>Paul Jeffrey Wilkerson:</b> Data curation; formal analysis; writing-original draft; writing-review and editing.</p><p>We apologize for this error.</p>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1304","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79549018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In Earle et al. (2021), the author contributions information was missing in the original published article. The Author Contributions section is provided below:
AUTHOR CONTRIBUTIONS
Martin Earle: Conceptualization; data curation; software; formal analysis; visualization; methodology; writing-original draft; project administration; writing-review and editing. Inês Breda: Conceptualization; data curation; investigation; writing-original draft; writing-review and editing. Amina K. Stoddart: Resources; supervision; funding acquisition; writing-review and editing. Graham A. Gagnon: Resources; supervision; funding acquisition; writing-review and editing.
We apologize for this error.
在Earle et al.(2021)中，原始发表的文章中缺少作者贡献信息。作者贡献部分如下:作者贡献smartin Earle:概念化;数据管理;软件;正式的分析;可视化;方法;原创作品草案;项目管理;写作-审查和编辑。Inês Breda:概念化;数据管理;调查;原创作品草案;写作-审查和编辑。Amina K. Stoddart:资源;监督;资金收购;写作-审查和编辑。Graham A. Gagnon:资源;监督;资金收购;写作-审查和编辑。我们为这个错误道歉。
{"title":"Predicting manganese and iron precipitation in drinking water biofilters","authors":"","doi":"10.1002/aws2.1303","DOIUrl":"10.1002/aws2.1303","url":null,"abstract":"<p>In Earle et al. (<span>2021</span>), the author contributions information was missing in the original published article. The Author Contributions section is provided below:</p><p><b>AUTHOR CONTRIBUTIONS</b></p><p><b>Martin Earle:</b> Conceptualization; data curation; software; formal analysis; visualization; methodology; writing-original draft; project administration; writing-review and editing. <b>Inês Breda:</b> Conceptualization; data curation; investigation; writing-original draft; writing-review and editing. <b>Amina K. Stoddart:</b> Resources; supervision; funding acquisition; writing-review and editing. <b>Graham A. Gagnon:</b> Resources; supervision; funding acquisition; writing-review and editing.</p><p>We apologize for this error.</p>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1303","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78660224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Daniel R. Bernstein, Graeme D. E. Glasgow, Mark C. Lay, Merilyn Manley-Harris
A comparison of granular and biological activated carbon (GAC and BAC) media used for drinking water treatment was made to assess differences in surface elemental composition. Fresh GAC, recently commissioned GAC and end-of-service life BAC from a water treatment plant in New Zealand were analyzed using scanning electron microscopy, energy-dispersive spectroscopy, and inductively coupled plasma-mass spectrometry (ICP-MS). Imaging revealed dense microbial colonization of the BAC surface compared to GAC media, and a mineralized surface layer high in manganese and oxygen. ICP-MS analysis also confirmed high levels of Mn in the BAC media relative to GAC media. As many bacterial species known to colonize BAC filters are also known as Mn oxidizers, this suggests a biogenic origin of the Mn-oxide deposition on the BAC surface. Given the properties of Mn-oxides, they may be implicated in the mechanism by which bacteria capture and metabolize substrates in BAC filters.
{"title":"Accumulation of manganese oxides in biological activated carbon filters: Implications for biodegradation studies","authors":"Daniel R. Bernstein, Graeme D. E. Glasgow, Mark C. Lay, Merilyn Manley-Harris","doi":"10.1002/aws2.1300","DOIUrl":"10.1002/aws2.1300","url":null,"abstract":"<p>A comparison of granular and biological activated carbon (GAC and BAC) media used for drinking water treatment was made to assess differences in surface elemental composition. Fresh GAC, recently commissioned GAC and end-of-service life BAC from a water treatment plant in New Zealand were analyzed using scanning electron microscopy, energy-dispersive spectroscopy, and inductively coupled plasma-mass spectrometry (ICP-MS). Imaging revealed dense microbial colonization of the BAC surface compared to GAC media, and a mineralized surface layer high in manganese and oxygen. ICP-MS analysis also confirmed high levels of Mn in the BAC media relative to GAC media. As many bacterial species known to colonize BAC filters are also known as Mn oxidizers, this suggests a biogenic origin of the Mn-oxide deposition on the BAC surface. Given the properties of Mn-oxides, they may be implicated in the mechanism by which bacteria capture and metabolize substrates in BAC filters.</p>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1300","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74861275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In Saetta et al. (2021), the author contributions information was missing in the original published article. The Author Contributions section is provided below:
AUTHOR CONTRIBUTIONS
Daniella Saetta: Conceptualization; data curation; software; formal analysis; validation; investigation; visualization; methodology; writing-original draft. Rain Richard: Conceptualization; data curation; investigation. Carlos Leyva: Conceptualization; data curation; software; investigation; visualization;" methodology. Paul Westerhoff: Conceptualization; funding acquisition; writing-review and editing. Treavor H. Boyer: Conceptualization; supervision; writing-review and editing.
We apologize for this error.
在Saetta et al.(2021)中，原始发表的文章中缺少作者贡献信息。作者贡献部分如下:作者贡献daniella Saetta:概念化;数据管理;软件;正式的分析;验证;调查;可视化;方法;原创作品。Rain Richard:概念化;数据管理;调查。Carlos Leyva:概念化;数据管理;软件;调查;可视化;”方法。Paul Westerhoff:概念化;资金收购;写作-审查和编辑。trevor H. Boyer:概念化;监督;写作-审查和编辑。我们为这个错误道歉。
{"title":"Data-mining methods predict chlorine residuals in premise plumbing using low-cost sensors","authors":"","doi":"10.1002/aws2.1301","DOIUrl":"10.1002/aws2.1301","url":null,"abstract":"<p>In Saetta et al. (<span>2021</span>), the author contributions information was missing in the original published article. The Author Contributions section is provided below:</p><p><b>AUTHOR CONTRIBUTIONS</b></p><p><b>Daniella Saetta:</b> Conceptualization; data curation; software; formal analysis; validation; investigation; visualization; methodology; writing-original draft. <b>Rain Richard:</b> Conceptualization; data curation; investigation. <b>Carlos Leyva:</b> Conceptualization; data curation; software; investigation; visualization;\" methodology. <b>Paul Westerhoff:</b> Conceptualization; funding acquisition; writing-review and editing. <b>Treavor H. Boyer:</b> Conceptualization; supervision; writing-review and editing.</p><p>We apologize for this error.</p>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91448436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Issam Najm, Karl Linden, Bryan Liu, Joseph Liles, Steve Winners
Bench-scale testing was conducted to evaluate the application of an Ultraviolet-hydrogen peroxide (UV-H2O2) advanced oxidation process (AOP) for the destruction of 1,4-Dioxane (47 μg/L) and varying concentrations of three volatile organic chemicals (VOCs), including trichloroethylene (TCE), tetrachloroethylene (PCE), and 1,1-dichloroethylene (1,1-DCE), from three samples of groundwater containing high alkalinity (281 mg/L as CaCO3). The UV doses applied ranged from zero to 5500 mJ/cm2 while the H2O2 concentrations ranged from 0 to 16 mg/L. The results showed that the bicarbonate and carbonate alkalinity greatly dominated the hydroxyl radical consumption and thus the 1,4-Dioxane destruction rate. The removal of perchlorate, chlorate, and nitrate prior to UV-H2O2 treatment had no discernable effect on 1,4-Dioxane destruction, while the removal of TOC increased the rate of 1,4-Dioxane destruction by approximately 25%. Depending on the combination of H2O2 concentration and UV dose, 1,4-Dioxane destruction ranged from negligible to greater than 99%.
{"title":"Destruction of 1,4-Dioxane and VOCs with UV-H2O2 in a high alkalinity groundwater","authors":"Issam Najm, Karl Linden, Bryan Liu, Joseph Liles, Steve Winners","doi":"10.1002/aws2.1296","DOIUrl":"10.1002/aws2.1296","url":null,"abstract":"<p>Bench-scale testing was conducted to evaluate the application of an Ultraviolet-hydrogen peroxide (UV-H<sub>2</sub>O<sub>2</sub>) advanced oxidation process (AOP) for the destruction of 1,4-Dioxane (47 μg/L) and varying concentrations of three volatile organic chemicals (VOCs), including trichloroethylene (TCE), tetrachloroethylene (PCE), and 1,1-dichloroethylene (1,1-DCE), from three samples of groundwater containing high alkalinity (281 mg/L as CaCO<sub>3</sub>). The UV doses applied ranged from zero to 5500 mJ/cm<sup>2</sup> while the H<sub>2</sub>O<sub>2</sub> concentrations ranged from 0 to 16 mg/L. The results showed that the bicarbonate and carbonate alkalinity greatly dominated the hydroxyl radical consumption and thus the 1,4-Dioxane destruction rate. The removal of perchlorate, chlorate, and nitrate prior to UV-H<sub>2</sub>O<sub>2</sub> treatment had no discernable effect on 1,4-Dioxane destruction, while the removal of TOC increased the rate of 1,4-Dioxane destruction by approximately 25%. Depending on the combination of H<sub>2</sub>O<sub>2</sub> concentration and UV dose, 1,4-Dioxane destruction ranged from negligible to greater than 99%.</p>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1296","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83583219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Developing socially acceptable, environmentally friendly, and financially viable asset management plans (AMPs) is a major challenge for water and wastewater utilities and calls for a comprehensive Sustainability Assessment (SA). This paper proposes a novel framework that applies System Dynamics and Life Cycle Assessment tools to evaluate the long-term sustainability of strategic asset management decisions for water and wastewater infrastructure systems. The merit of the proposed framework in dealing with the non-linearity and dynamic behavior of the socio-economic systems and its utility for SA of strategic asset management decisions are demonstrated in a case study of a Wastewater Collection (WWC) network system. Furthermore, the significant importance of population growth and urban densification policies in sustainability of AMP are highlighted by comparing four alternative scenarios of (1) 100% urban densification, (2) 0% urban densification, (3) 50% densification, and (4) no population growth in the case study. The results of the case study show that the greenhouse gas emission, operational and capital expenses, and bill burden of WWC and treatment services significantly reduce with urban densification.
{"title":"Sustainability assessment of strategic asset management decisions on municipal water infrastructure systems: Framework and application","authors":"Hamed Mohammadifardi, Mark Knight, Andre Unger","doi":"10.1002/aws2.1297","DOIUrl":"10.1002/aws2.1297","url":null,"abstract":"<p>Developing socially acceptable, environmentally friendly, and financially viable asset management plans (AMPs) is a major challenge for water and wastewater utilities and calls for a comprehensive Sustainability Assessment (SA). This paper proposes a novel framework that applies System Dynamics and Life Cycle Assessment tools to evaluate the long-term sustainability of strategic asset management decisions for water and wastewater infrastructure systems. The merit of the proposed framework in dealing with the non-linearity and dynamic behavior of the socio-economic systems and its utility for SA of strategic asset management decisions are demonstrated in a case study of a Wastewater Collection (WWC) network system. Furthermore, the significant importance of population growth and urban densification policies in sustainability of AMP are highlighted by comparing four alternative scenarios of (1) 100% urban densification, (2) 0% urban densification, (3) 50% densification, and (4) no population growth in the case study. The results of the case study show that the greenhouse gas emission, operational and capital expenses, and bill burden of WWC and treatment services significantly reduce with urban densification.</p>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1297","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74753479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In McCleaf et al. (2021), the author contributions information was missing in the original published article. The Author Contributions section is provided below:
在McCleaf et al.(2021)中，原始发表的文章中缺少作者贡献信息。作者贡献部分如下:作者贡献philip McCleaf:概念化;资源;正式的分析;监督;资金收购;可视化;方法;原创作品草案;项目管理;写作-审查和编辑。Ylva Kjellgren:概念化;正式的分析;调查;可视化;写作-审查和编辑。卢茨·阿伦斯:概念化;资源;正式的分析;监督;验证;项目管理;写作-审查和编辑。我们为这个错误道歉。
{"title":"Foam fractionation removal of multiple per- and polyfluoroalkyl substances from landfill leachate","authors":"","doi":"10.1002/aws2.1299","DOIUrl":"10.1002/aws2.1299","url":null,"abstract":"<p>In McCleaf et al. (<span>2021</span>), the author contributions information was missing in the original published article. The Author Contributions section is provided below:</p><p><b>AUTHOR CONTRIBUTIONS</b></p><p><b>Philip McCleaf:</b> Conceptualization; resources; formal analysis; supervision; funding acquisition; visualization; methodology; writing-original draft; project administration; writing-review and editing. <b>Ylva Kjellgren:</b> Conceptualization; formal analysis; investigation; visualization; writing-review and editing. <b>Lutz Ahrens:</b> Conceptualization; resources; formal analysis; supervision; validation; project administration; writing-review and editing.</p><p>We apologize for this error.</p>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1299","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81607180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In Sultana (2022), the author contributions information was missing in the original published article. The Author Contributions section is provided below:
{"title":"Optimum tank size for large rainwater harvesting system","authors":"","doi":"10.1002/aws2.1298","DOIUrl":"10.1002/aws2.1298","url":null,"abstract":"<p>In Sultana (<span>2022</span>), the author contributions information was missing in the original published article. The Author Contributions section is provided below:</p><p><b>AUTHOR CONTRIBUTIONS</b></p><p><b>Rebeka Sultana:</b> Conceptualization; resources; data curation; software; formal analysis; supervision; funding acquisition; validation; investigation; methodology; writing-original draft; project administration.</p><p>We apologize for this error.</p>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1298","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76030432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Deena Hannoun, Jeffrey Belding, Todd Tietjen, Robert Devaney
The Colorado River Basin is experiencing a significant drought that began in 2000. As water supplies are projected to continue declining, water managers are concerned with the ongoing treatability of Lake Mead water, which provides 90% of the source water for the Las Vegas Valley, and is a crucial link to downstream source water. The drinking water intake currently draws high-quality, low-turbidity water; however, turbidity is projected to increase. This study assesses treatability by quantifying projected turbidity of source water withdrawn from a drinking water intake in Lake Mead, Nevada. The water quality modeling results provide projections for Lake Mead water turbidities in the case of extreme drawdown and provide guidance for treatment staff. The underlying process incorporated existing water quality data and identified potential problems, yielding a template for hydrodynamic and water quality modeling that utilities can take advantage of to plan for future changes in source water quality.
{"title":"Assessing treatability with simulated lake drawdown: Quantifying drought-driven turbidity in source water","authors":"Deena Hannoun, Jeffrey Belding, Todd Tietjen, Robert Devaney","doi":"10.1002/aws2.1295","DOIUrl":"10.1002/aws2.1295","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>The Colorado River Basin is experiencing a significant drought that began in 2000. As water supplies are projected to continue declining, water managers are concerned with the ongoing treatability of Lake Mead water, which provides 90% of the source water for the Las Vegas Valley, and is a crucial link to downstream source water. The drinking water intake currently draws high-quality, low-turbidity water; however, turbidity is projected to increase. This study assesses treatability by quantifying projected turbidity of source water withdrawn from a drinking water intake in Lake Mead, Nevada. The water quality modeling results provide projections for Lake Mead water turbidities in the case of extreme drawdown and provide guidance for treatment staff. The underlying process incorporated existing water quality data and identified potential problems, yielding a template for hydrodynamic and water quality modeling that utilities can take advantage of to plan for future changes in source water quality.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1295","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85683755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reverse osmosis (RO) typically removes >98% arsenate (As[V]) but removes arsenite (As[III]) comparatively poorly (approximately 50%–80%). Therefore, oxidizing As(III) to As(V) can improve arsenic removal using RO. In this study, electrolytic oxidation was used to oxidize As(III) in the feed water, and an extreme low-pressure RO membrane was subsequently used to remove the arsenic. Using Ti/IrO2 electrodes under 30 mA DC current in 500 mg/L NaCl solution primarily generated free chlorine, which completely oxidized 300 μg/L As(III) to As(V). Subsequent arsenic removal by RO increased from 54.2% without oxidation to 98.2% with oxidation. Using electrolysis-RO, arsenic removal significantly increased beyond RO alone, even in the presence of ferrous iron and natural organic matter. When sulfide and As(III) are present in water, they react to produce thioarsenate ions, the formation of which increased As(III) removal to 90% without electrolytic oxidation and electrolytic oxidation did not improve arsenic removal beyond these levels.
{"title":"Sequential electrolysis and reverse osmosis to improve arsenic removal from water","authors":"Yizhi Hou, Brooke K. Mayer","doi":"10.1002/aws2.1294","DOIUrl":"10.1002/aws2.1294","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Reverse osmosis (RO) typically removes >98% arsenate (As[V]) but removes arsenite (As[III]) comparatively poorly (approximately 50%–80%). Therefore, oxidizing As(III) to As(V) can improve arsenic removal using RO. In this study, electrolytic oxidation was used to oxidize As(III) in the feed water, and an extreme low-pressure RO membrane was subsequently used to remove the arsenic. Using Ti/IrO<sub>2</sub> electrodes under 30 mA DC current in 500 mg/L NaCl solution primarily generated free chlorine, which completely oxidized 300 μg/L As(III) to As(V). Subsequent arsenic removal by RO increased from 54.2% without oxidation to 98.2% with oxidation. Using electrolysis-RO, arsenic removal significantly increased beyond RO alone, even in the presence of ferrous iron and natural organic matter. When sulfide and As(III) are present in water, they react to produce thioarsenate ions, the formation of which increased As(III) removal to 90% without electrolytic oxidation and electrolytic oxidation did not improve arsenic removal beyond these levels.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1294","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82783487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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