AWWA water science最新文献_第10页

The Marshall Fire: Scientific and policy needs for water system disaster response 马歇尔大火：水系统灾害应对的科学和政策需求

AWWA water science Pub Date : 2023-01-17 DOI: 10.1002/aws2.1318

Andrew J. Whelton, Chad Seidel, Brad P. Wham, Erica C. Fischer, Kristofer Isaacson, Caroline Jankowski, Nathan MacArthur, Elizabeth McKenna, Christian Ley

{"title":"The Marshall Fire: Scientific and policy needs for water system disaster response","authors":"Andrew J. Whelton, Chad Seidel, Brad P. Wham, Erica C. Fischer, Kristofer Isaacson, Caroline Jankowski, Nathan MacArthur, Elizabeth McKenna, Christian Ley","doi":"10.1002/aws2.1318","DOIUrl":"https://doi.org/10.1002/aws2.1318","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 The 2021 Marshall Fire was the costliest fire in Colorado's history and destroyed more than 1,000 homes and businesses. The disaster displaced over 40,000 people and damaged six public drinking water systems. A case study was developed to better understand decisions, resources, expertise, and response limitations during and after the wildfire. The fire caused all water systems to lose power. Power loss was sometimes coupled with structure destruction, distribution depressurization, and the failure of backup power systems. These consequences jeopardized fire-fighting support and allowed for volatile organic compound and semi-volatile organic compound contamination of water distribution systems. Water system staff, with help from neighboring systems and external technical experts, stabilized the infrastructure, found and removed the contamination, and restored services. Actions were identified for utilities, governments, and researchers that could help communities minimize wildfire impacts, better protect workers and the population, and enable water systems to more rapidly respond and recover.\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1318","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50151671","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}

引用次数: 7

Improvements in the reduction coagulation filtration process for hexavalent chromium treatment 还原-混凝-过滤处理六价铬工艺的改进

AWWA water science Pub Date : 2023-01-06 DOI: 10.1002/aws2.1315

Craig Gorman, Anthony Kennedy, Carleigh Samson, Sarah Plummer, Eli Townsend, Chad Seidel

{"title":"Improvements in the reduction coagulation filtration process for hexavalent chromium treatment","authors":"Craig Gorman, Anthony Kennedy, Carleigh Samson, Sarah Plummer, Eli Townsend, Chad Seidel","doi":"10.1002/aws2.1315","DOIUrl":"https://doi.org/10.1002/aws2.1315","url":null,"abstract":"Reduction coagulation filtration using ferrous iron (Fe(II)-RCF), or reduction filtration using stannous tin (Sn(II)-RF), for the removal of hexavalent chromium (Cr(VI)) from drinking water represent attractive alternatives to ion exchange or reverse osmosis. With a new maximum contaminant level for Cr(VI) anticipated in California, this study sought to expand on previous research by applying Fe(II)-RCF and Sn(II)-RF to multiple groundwaters under a variety of reductant dose and reduction time scenarios. Four different granular filter media were also tested for removal of total chromium (Cr(T)) following Cr(VI) reduction to trivalent chromium (Cr(III)). Sodium hypochlorite, instead of aeration, was used to oxidize excess Fe(II) to Fe(III) prior to filtration, with minimal Cr(III) to Cr(VI) reoxidation. Sn(II)-RF was also able to achieve Cr(T) and Cr(VI) treatment goals without dedicated reduction time prior to filtration. Results of this study were used to develop more up-to-date, feasibility-level, 20-year annualized cost estimates.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1315","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50133083","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}

引用次数: 0

Shift to remote learning degrades water quality in buildings 向远程学习的转变降低了建筑物的水质

AWWA water science Pub Date : 2022-12-21 DOI: 10.1002/aws2.1316

Katelin Aden, Treavor H. Boyer

引用次数: 1

Comparison of anthracite and GAC biofilter performance for surface-water manganese removal 无烟煤与GAC生物滤池去除地表水锰的性能比较

AWWA water science Pub Date : 2022-12-21 DOI: 10.1002/aws2.1314

Ashley N. Kent, Martin Earle, Jacqueline Iannuzzi, Cynthia Ha, Lyda Hakes, Amina Stoddart, William Knocke, Graham Gagnon

{"title":"Comparison of anthracite and GAC biofilter performance for surface-water manganese removal","authors":"Ashley N. Kent, Martin Earle, Jacqueline Iannuzzi, Cynthia Ha, Lyda Hakes, Amina Stoddart, William Knocke, Graham Gagnon","doi":"10.1002/aws2.1314","DOIUrl":"10.1002/aws2.1314","url":null,"abstract":"Alameda County Water District has observed increased biofilter effluent manganese concentrations during winter operations. To investigate manganese removal across surface water biofilters during cold-water conditions, trends were analyzed between water temperature and manganese removal across multiple testing scales, multiple biofilter influent water qualities, and both anthracite and GAC media. During acclimation of new biofilters, 100% removal of manganese was observed sooner across both anthracite and GAC biofilters brought online at 20°C compared to 12°C. Acclimation at 12°C required 18 extra days for the GAC biofilters and 48 additional days for the anthracite biofilters. For fully acclimated biofilters, a decrease in manganese removal across both GAC and anthracite biofilters at temperatures below 15°C was observed. However, greater and more consistent manganese removal was observed across GAC compared to anthracite biofilters. Performance differences between locations also suggest that operational and water quality conditions also likely affect manganese removal.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1314","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90859560","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}

引用次数: 1

Corrigendum—The importance of temperature on Henry's-law solubility constants: Removing trihalomethanes by aeration 更正-温度对亨利定律溶解度常数的重要性:曝气去除三卤甲烷

AWWA water science Pub Date : 2022-11-29 DOI: 10.1002/aws2.1313

Robert Thurnau, Robert M. Clark

引用次数: 1

Assessing national HAA9 occurrence and impacts of a potential HAA9 regulation 评估国家HAA9的发生和潜在的HAA9法规的影响

AWWA water science Pub Date : 2022-11-03 DOI: 10.1002/aws2.1312

Carleigh C. Samson, Chad J. Seidel

引用次数: 2

Survey of 226Ra/228Ra and inorganic constituents in Iowa private drinking water wells 爱荷华州私人饮用水井中226Ra/228Ra及无机成分的调查

AWWA water science Pub Date : 2022-11-03 DOI: 10.1002/aws2.1311

Margaret E. Carolan, Richard J. Langel, Dustin May, Anthony DeSalvo, Humberto E. Gonzalez-Ribot, Alyssa J. Mattson, Michael D. Schueller, Darrin A. Thompson, David M. Cwiertny, Tori Z. Forbes

{"title":"Survey of 226Ra/228Ra and inorganic constituents in Iowa private drinking water wells","authors":"Margaret E. Carolan, Richard J. Langel, Dustin May, Anthony DeSalvo, Humberto E. Gonzalez-Ribot, Alyssa J. Mattson, Michael D. Schueller, Darrin A. Thompson, David M. Cwiertny, Tori Z. Forbes","doi":"10.1002/aws2.1311","DOIUrl":"10.1002/aws2.1311","url":null,"abstract":"Radium is a naturally-occurring radioactive element found in Upper Midwest aquifers, yet exposure risks for unregulated water sources in this region are unknown. A survey of 226/228Ra and other inorganic constituents in 94 private wells was conducted in 2019 across 10 Iowa counties. Within private wells, 53% measured below minimum detectable activity whereas 6.3% have 226/228Ra levels above the United States Environmental Protection Agency Maximum Contaminant Level. 226/228Ra occurrence was not associated with well-depth or chemical surrogates, but were generally consistent with the lithology and historical water quality trends for aquifers. In 2020, 11 of the 226/228Ra-impacted wells were re-sampled to assess the efficacy of in-home water treatment. Water softeners reduced 226/228Ra to non-detectable activities, but other inorganic constituents persisted and their removal required more advanced treatment. This study suggests that 226/228Ra occurrence in private wells can reasonably be anticipated from public water supply data if reliable information is available to identify the source aquifer.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1311","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89138524","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}

引用次数: 0

Discrepancies and artifacts during preservation and analysis of the disinfection by-product 2,6-dichloro-1,4-benzoquinone 消毒副产物2,6-二氯-1,4-苯醌保存分析过程中的差异和伪影

AWWA water science Pub Date : 2022-11-03 DOI: 10.1002/aws2.1310

Aarthi Mohan, David A. Reckhow

引用次数: 0

Pilot-scale comparison of granular activated carbons, ion exchange, and alternative adsorbents for per- and polyfluoroalkyl substances removal 颗粒活性炭、离子交换和替代吸附剂去除全氟烷基和多氟烷基物质的中试规模比较

AWWA water science Pub Date : 2022-10-06 DOI: 10.1002/aws2.1308

Ricardo Medina, Manmeet W. Pannu, Scott A. Grieco, Michael Hwang, Christine Pham, Megan H. Plumlee

{"title":"Pilot-scale comparison of granular activated carbons, ion exchange, and alternative adsorbents for per- and polyfluoroalkyl substances removal","authors":"Ricardo Medina, Manmeet W. Pannu, Scott A. Grieco, Michael Hwang, Christine Pham, Megan H. Plumlee","doi":"10.1002/aws2.1308","DOIUrl":"10.1002/aws2.1308","url":null,"abstract":"Eight granular activated carbons (GAC), four anion exchange (IX) resins, and two alternative adsorbents (AAs) were tested for the removal of per- and polyfluoroalkyl substances (PFAS) from a groundwater source used for drinking water. The study was conducted using pilot(meter)-scale columns operated in continuous-flow mode for 16–26 months. Comparison between GAC adsorbents showed that bituminous GACs exhibited higher adsorption than non-/sub-bituminous GACs. Testing of a reactivated and new GAC showed no significant differences with respect to PFAS adsorption. Of the four IX resins tested, one resin showed superior adsorption when compared with all three IX resins. A surface-modified bentonite adsorbent showed superior removal efficiencies over all adsorbent types tested here. These results provide benchmark performance and adsorption capacities at pilot-scale for various adsorbents and highlight the promise of AAs to remove PFAS from water sources with low (ng/L) concentrations.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1308","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91472064","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}

引用次数: 6

Operator-informed risk assessment tool: Opportunities and barriers to support risk management practices 作业者知情的风险评估工具:支持风险管理实践的机会和障碍

AWWA water science Pub Date : 2022-10-03 DOI: 10.1002/aws2.1307

Kaycie Lane, Megan Fuller, Graham Gagnon

{"title":"Operator-informed risk assessment tool: Opportunities and barriers to support risk management practices","authors":"Kaycie Lane, Megan Fuller, Graham Gagnon","doi":"10.1002/aws2.1307","DOIUrl":"10.1002/aws2.1307","url":null,"abstract":"Successfully implementing water safety plans (WSPs) in small, municipal drinking water systems is understudied in affluent jurisdictions where WSPs are not required by regulations. We piloted a computer-based risk assessment survey in eight municipal water systems in Nova Scotia, Canada to evaluate the benefits and challenges of implementing risk assessment strategies in non-WSP jurisdictions. Semi-structured interviews were conducted with water operators and managers to gather feedback on the risk assessment survey and process. Results indicated difficulties quantifying risk despite streamlining the risk identification process, resulting in key informants viewing the risk assessment as strictly diagnostic and unlikely to be integrated into operational practice if not required. We identified a need to shift water system culture from a regulatory-based to a knowledge-based mindset for successful risk assessment implementation. Clear lines of communication, increased understanding of risk, and commitment to improvement are critical to shifting water system culture toward a risk-based water quality management approach.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://awwa.onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1307","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73835610","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}

引用次数: 0