AWWA water science最新文献_第2页

Interlaboratory Performance Study of Cyanobacteria DNA Reference Materials Using a qPCR Format for Monitoring Cyanobacterial Blooms 使用qPCR格式监测蓝藻华的蓝藻DNA参考物质的实验室间性能研究

AWWA water science Pub Date : 2025-03-10 DOI: 10.1002/aws2.70018

Leonardo B. Pinheiro, Mark Van Asten, Luminita Antin, Hunter Adams, Judy Y. Qiu, Mary Robinson, Suzane DeLorenzo, Robert Holmes, Megan Hurd, Rueyjing Tang, Kale Clausen, Kristin Greenwood, Rahana Sudhi, Paul Wright, Konstanze Steiner, Anne Gérard, Somanath Bhat, Anna Baoutina, Kerry Emslie

{"title":"Interlaboratory Performance Study of Cyanobacteria DNA Reference Materials Using a qPCR Format for Monitoring Cyanobacterial Blooms","authors":"Leonardo B. Pinheiro, Mark Van Asten, Luminita Antin, Hunter Adams, Judy Y. Qiu, Mary Robinson, Suzane DeLorenzo, Robert Holmes, Megan Hurd, Rueyjing Tang, Kale Clausen, Kristin Greenwood, Rahana Sudhi, Paul Wright, Konstanze Steiner, Anne Gérard, Somanath Bhat, Anna Baoutina, Kerry Emslie","doi":"10.1002/aws2.70018","DOIUrl":"https://doi.org/10.1002/aws2.70018","url":null,"abstract":"<div>\u0000 \u0000 <p>Digital PCR (dPCR) has increasingly been used as a primary measurement method for the characterization of nucleic acid reference materials. Nucleic acid reference materials are particularly useful when used for the validation and calibration of quantitative PCR (qPCR). In this study, we describe the development and characterization of Cyanobacteria DNA reference materials (RM) using dPCR. An international interlaboratory study involving 14 laboratories was conducted using the Cyanobacteria DNA RM in combination with a lyophilized PCR reagent designed for the monitoring of Cyanobacteria bloom events. Of the 55 scored study results obtained using qPCR-based techniques, 62% were within the 8% relative expanded uncertainty based on dPCR measurements, while 100% of the study results returned satisfactory <i>z</i> scores calculated using a set performance coefficient of variation equivalent to one Ct value. The study participants' results indicate that the cyanobacteria DNA RM is fit for the purpose of method validation and quality control of the qPCR format used for monitoring toxic cyanobacteria algae bloom events. Most importantly, the study results demonstrated that the use of standardized reagents combined with highly characterized nucleic acid RMs allows qPCR-based DNA quantification technology to reach levels of accuracy and reproducibility comparable to those achieved with digital PCR technology.</p>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143595056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robustness and Related Concepts for Climate Adaptation in Drinking Water Treatment Systems 饮用水处理系统气候适应的鲁棒性和相关概念

AWWA water science Pub Date : 2025-02-20 DOI: 10.1002/aws2.70017

Kirti S. Nemani, Sigrid Peldszus, Peter M. Huck

引用次数: 0

Lithium Removal From Drinking Water 从饮用水中去除锂

AWWA water science Pub Date : 2025-02-10 DOI: 10.1002/aws2.70016

Asher E. Keithley, Page Jordan, Christy Muhlen, Matthew Pinelli, Darren A. Lytle

引用次数: 0

Automated Acquisition of Historical Water Distribution Pipe Repair Location Data 历史配水管维修位置数据的自动获取

AWWA water science Pub Date : 2025-01-29 DOI: 10.1002/aws2.70015

Charles Scawthorn, Joseph McGlinchy, Keith Porter

{"title":"Automated Acquisition of Historical Water Distribution Pipe Repair Location Data","authors":"Charles Scawthorn, Joseph McGlinchy, Keith Porter","doi":"10.1002/aws2.70015","DOIUrl":"https://doi.org/10.1002/aws2.70015","url":null,"abstract":"<div>\u0000 \u0000 <p>We report an innovative method of extracting water distribution network (WDN) historical repair location data from images of paper repair data maps, to provide usable geo-referenced digitally formatted data. For most water utilities, repair location data typically fall into two eras: pre- and post-GIS, approximately corresponding to pre- and post-2000. Automated conversion of pre-2000 paper maps to a geo-referenced digital format provides additional data to clarify trends in pipe repair causative factors, such as material defects, corrosive or creeping soils, and traffic. We applied the methodology to more than 3,000 maps of the Los Angeles Department of Water and Power WDN, thereby extending the record of repairs backward from 2000 to 1975, almost doubling the number of repair records. The methodology's value, when using the resulting data for analysis, lies in the following: (a) large volumes of hard copy data can now be acquired in an automated manner, saving significant time and effort, (b) specific repair locations are accurately captured, resulting in (c) more reliable, confident, analyses, and results, (d) ongoing problem areas, due to corrosive or creeping soils for example, can be more specifically understood.</p>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding the Cost of Basic Drinking Water Services in the United States: A National Assessment 了解美国基本饮用水服务的成本：一项国家评估

AWWA water science Pub Date : 2025-01-23 DOI: 10.1002/aws2.70014

Sara Hughes, Christine J. Kirchhoff, Michelle Lee, David Switzer

引用次数: 0

Method Development, Interlaboratory Comparison, and Occurrence Study for 19 Taste and Odor Compounds by Solid-Phase Microextraction Gas Chromatography–Mass Spectrometry 用固相微萃取-气相色谱-质谱法测定19种味觉和气味化合物的方法发展、实验室间比较和发生研究

AWWA water science Pub Date : 2025-01-07 DOI: 10.1002/aws2.70013

Hunter Adams, Sam Reeder, Katie Kohoutek, Christiane Hoppe-Jones, Susheera Pochiraju, Mark Southard, Keisuke Ikehata, Carlos A. Espindola Jr, Andrea M. Dietrich, Gary A. Burlingame, Daniel K. Nix, Ruth Marfil-Vega, Terry Jeffers, I. H. (Mel) Suffet, Michelle Ashman, Kandé Duncan, Eduardo Morales, William C. Lipps

{"title":"Method Development, Interlaboratory Comparison, and Occurrence Study for 19 Taste and Odor Compounds by Solid-Phase Microextraction Gas Chromatography–Mass Spectrometry","authors":"Hunter Adams, Sam Reeder, Katie Kohoutek, Christiane Hoppe-Jones, Susheera Pochiraju, Mark Southard, Keisuke Ikehata, Carlos A. Espindola Jr, Andrea M. Dietrich, Gary A. Burlingame, Daniel K. Nix, Ruth Marfil-Vega, Terry Jeffers, I. H. (Mel) Suffet, Michelle Ashman, Kandé Duncan, Eduardo Morales, William C. Lipps","doi":"10.1002/aws2.70013","DOIUrl":"https://doi.org/10.1002/aws2.70013","url":null,"abstract":"<div>\u0000 \u0000 <p>Public water systems (PWSs) need robust taste and odor (T&O) methods for a diverse range of compounds to proactively monitor their systems from source to tap and make informed treatment decisions. In this study, Standard Method 6040D T&O compounds by solid-phase microextraction gas chromatography–mass spectrometry was revised to include 19 T&O compounds with various odor descriptors including earthy, musty, grassy, woody, fishy, septic, fruity, and sweet. An interlaboratory comparison was performed to determine method accuracy, precision, reproducibility, and ruggedness. Three laboratories achieved passing quality control (QC) acceptance criteria for all 19 compounds, and one laboratory achieved passing QC acceptance criteria for 14 compounds. In this article, occurrence data and method applications are also discussed, which will allow PWSs to monitor diverse classes of T&O compounds and make informed, proactive treatment decisions to maintain high aesthetic quality for their customers.</p>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mixed Adsorbents: Synergic Effects Improve Problematic Compounds Removal During Drinking Water Treatment 混合吸附剂：协同效应改善饮用水处理过程中问题化合物的去除

AWWA water science Pub Date : 2025-01-07 DOI: 10.1002/aws2.70011

Katerina Sichrova, Lenka Cermakova, Katerina Novotna, Lenka Pivokonska, Veronika Zustakova, Martin Pivokonsky

引用次数: 0

Pilot-Scale Analysis of Stagnation and Flushing in Premise Plumbing 住宅水管堵塞和冲水的中试分析

AWWA water science Pub Date : 2025-01-06 DOI: 10.1002/aws2.70012

Derek Hogue, McKenzie Steele, Treavor H. Boyer

引用次数: 0

Impact of flocculated and softened particles on UV254 inactivation of indigenous spores 絮凝和软化颗粒对本地孢子UV254失活的影响

AWWA water science Pub Date : 2024-12-22 DOI: 10.1002/aws2.70010

Judith Straathof, Zuzana Bohrerova, Natalie M. Hull

{"title":"Impact of flocculated and softened particles on UV254 inactivation of indigenous spores","authors":"Judith Straathof, Zuzana Bohrerova, Natalie M. Hull","doi":"10.1002/aws2.70010","DOIUrl":"https://doi.org/10.1002/aws2.70010","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>US regulatory ultraviolet (UV) disinfection credit is typically granted when turbidity is ≤1 NTU. However, studies show turbidity does not always correlate well with UV dose responses. This study examined the impact of worst-case high turbidity scenarios at drinking water treatment plants on UV<sub>254</sub> inactivation of indigenous spores from unfiltered source water and unsettled flocculation and softening steps. Flocculated water (turbidity = 6.49–164 NTU) had the lowest dose response with a significantly lower Geeraerd-tail maximum inactivation rate (<i>k</i><sub>max</sub> = 0.021 cm<sup>2</sup>/mJ) and higher residual population density (<i>N</i><sub>res</sub> = 7.081 SFU/mL). Raw source water (<i>k</i><sub>max</sub> = 0.027 cm<sup>2</sup>/mJ, <i>N</i><sub>res</sub> = 1.168 SFU/mL, turbidity = 0.978–215 NTU) and softened water (<i>k</i><sub>max</sub> = 0.030 cm<sup>2</sup>/mJ, <i>N</i><sub>res</sub> = 0.216 SFU/mL, turbidity = 318–495 NTU) had similar dose responses despite significantly different water quality. Particle size and the degree of particle-associated spores best explained the differences in dose responses. Almost all spores were associated with flocculated particles instead of free-floating, which increased tailing and negatively impacted UV inactivation. Based on regulatory reduction equivalent dose bias factors and UV sensitivities of spiked <i>Bacillus subtilis</i> spores, <i>Cryptosporidium</i> would be 4-log inactivated in these raw, flocculated, or softened waters if UV transmission were ≥65%, 90%, or 80%, respectively, even though turbidity was grossly >1 NTU. Depending on particle characteristics, partial inactivation credit when turbidity is >1 NTU should be considered to avoid high-tier violations while still protecting public health.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.70010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118150","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

Lithium in drinking water: Review of chemistry, analytical methods, and treatment technologies 饮用水中的锂：化学、分析方法和处理技术综述

AWWA water science Pub Date : 2024-12-17 DOI: 10.1002/aws2.70009

Julie A. Korak, Philip J. Brandhuber, Joseph E. Goodwill

{"title":"Lithium in drinking water: Review of chemistry, analytical methods, and treatment technologies","authors":"Julie A. Korak, Philip J. Brandhuber, Joseph E. Goodwill","doi":"10.1002/aws2.70009","DOIUrl":"https://doi.org/10.1002/aws2.70009","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Lithium was included in the fifth Unregulated Contaminants Monitoring Rule, signaling the Environmental Protection Agency's interest in regulating lithium. Many questions regarding occurrence, health effects, and treatability of lithium exist. This review primarily focuses on the relationship between lithium chemistry and treatability. Sampling indicates nationwide lithium occurrence in drinking water. Yet, lithium is not included in the Integrated Risk Information System, reflecting a lack of censuses regarding its health effects. Aqueous lithium is a monovalent cation with size, charge density, and solubility properties that present treatment challenges. Lithium's growing economic value is stimulating new extraction and isolation technologies, but these may not be transferable to drinking water treatment. Currently, reverse osmosis is the only full-scale drinking water treatment technology that can reliably remove significant levels (>50%) of lithium. Focusing future research efforts on electrodialysis and inorganic ion sieves may yield significant gains in effectiveness and readiness for the drinking water industry.</p>\u0000 </section>\u0000 </div>","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0