Ground Water Monitoring and Remediation最新文献_第10页

Field Evaluation of the Sentinel™ Integrative Passive Sampler for the Measurement of Perfluoroalkyl and Polyfluoroalkyl Substances in Water Using a Modified Organosilica Adsorbent 使用改性有机硅吸附剂测量水中全氟烷基和多氟烷基物质的Sentinel™综合被动采样器的现场评估

IF 1.9 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2023-04-01 DOI: 10.1111/gwmr.12574

Paul L. Edmiston, Erika Carter, Kevin Toth, Riley Hershberger, Noah Hill, Patrick Versluis, Patrick Hollinden, Craig Divine

{"title":"Field Evaluation of the Sentinel™ Integrative Passive Sampler for the Measurement of Perfluoroalkyl and Polyfluoroalkyl Substances in Water Using a Modified Organosilica Adsorbent","authors":"Paul L. Edmiston, Erika Carter, Kevin Toth, Riley Hershberger, Noah Hill, Patrick Versluis, Patrick Hollinden, Craig Divine","doi":"10.1111/gwmr.12574","DOIUrl":"10.1111/gwmr.12574","url":null,"abstract":"A passive sampler specifically designed to measure perfluoroalkyl and polyfluoroalkyl substances (PFAS) in water was tested in four study areas (Ellsworth and Peterson Air Force bases, CO and SD; the Ohio River, OH, WV, KY, IN; and the Santa Ana River, CA). Locations included both groundwater and surface water locations. Over the 2-year study, 96 passive samplers were deployed at 33 sample locations and were compared with co-collected grab samples, all of which were measured for 19 PFAS analytes by HPLC–MS/MS. Correlations were observed (typically within 2× difference) between aqueous PFAS concentrations measured by passive versus discrete grab samples across over 5 orders of magnitude in concentration (0.5 to 150,000 ng/L). Overall relative percent difference between grab and passive results displayed a median of 18% (interquartile range of −19 to 73%). Detection limits were around 1 ng/L for a 2-week sampling time with sampling rates ranging from 12 to 70 mL/day in flowing systems. Duplicate samplers were deployed in all study areas which indicated a 14 to 42% (median 24%) relative standard deviation in the precision of passive sampling. Larger variances were seen with sites with higher and potentially more variable water flows. A sub-set of duplicate samplers were measured by a commercial laboratory which returned equivalent data to research laboratory measurements (43 [±26 SD]% relative percent difference). Standardized protocols and calculation methods were developed to facilitate expanded testing and future broader use of passive sampling for PFAS by site investigators.","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ngwa.onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12574","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129378563","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

Desorption and Co-Dissolution of Uranium-Bearing Solids During Alkalinity-Enhanced Flushing of Contaminated Sediments 碱性强化冲洗污染沉积物过程中含铀固体的解吸和共溶

IF 1.9 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2023-03-29 DOI: 10.1111/gwmr.12573

Martin Dangelmayr, Cullen Meurer, Aaron Tigar, Raymond H. Johnson, Charles Paradis

{"title":"Desorption and Co-Dissolution of Uranium-Bearing Solids During Alkalinity-Enhanced Flushing of Contaminated Sediments","authors":"Martin Dangelmayr, Cullen Meurer, Aaron Tigar, Raymond H. Johnson, Charles Paradis","doi":"10.1111/gwmr.12573","DOIUrl":"https://doi.org/10.1111/gwmr.12573","url":null,"abstract":"Elevated uranium concentrations in groundwater remain a persistent challenge at contaminated sites. Several sites rely on natural flushing of uranium as a remediation strategy. Uncertainties in conceptual models can cause remediation strategies to underestimate timeframes required to reach remediation goals. In this study, laboratory experiments were conducted to investigate uranium flushing of sediments from a site with persistent groundwater contamination. Six columns were used to simulate alkalinity-enhanced flushing of uranium from sediments, by switching influent alkalinity after ~12 pore volumes. About 20% to 31% of sediment uranium was consistently flushed from the sediments. Kd values varied greatly (5.3 to 117 L/kg) but were consistently lower (20% to 50%) during influents with elevated alkalinity. The mass of uranium recovered from the columns also was consistently higher (5% to 80%) during alkalinity-enhanced flushing periods. However, column experiments with sequentially increasing alkalinity showed diminishing returns in uranium elution at higher carbonate concentrations. The loss of flushing efficiency is attributed to significant calcite precipitation at higher alkalinities. The results show that alkalinity-enhanced flushing of uranium could be employed as a viable remediation scheme if calcite precipitation could be minimized in a field application.","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50147937","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

Demonstration of a Principal Component Analysis Trajectory Method to Assess Bioremediation Progress at a TCE-Impacted Site 用主成分分析轨迹法评估TCE影响现场的生物修复进展

IF 1.9 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2023-03-24 DOI: 10.1111/gwmr.12572

Matan Freedman, Kevin G. Mumford, Anthony Danko, Dylan Hart, Stephen D. Richardson

{"title":"Demonstration of a Principal Component Analysis Trajectory Method to Assess Bioremediation Progress at a TCE-Impacted Site","authors":"Matan Freedman, Kevin G. Mumford, Anthony Danko, Dylan Hart, Stephen D. Richardson","doi":"10.1111/gwmr.12572","DOIUrl":"https://doi.org/10.1111/gwmr.12572","url":null,"abstract":"In-situ bioremediation (ISB) is a popular remediation technology for the treatment of a range of compounds, including chlorinated solvents such as tetrachloroethene and trichloroethene (TCE). Large amounts of data are collected before, during, and after ISB applications to determine amendment approaches, monitor progress and evaluate success. The interpretation of these large datasets can be limited by the tools and techniques used for data analysis, and there is considerable potential in applying data reduction and multivariate techniques used elsewhere to performance monitoring during ISB. In this study, a principal component analysis (PCA) trajectory method was applied to a TCE-impacted ISB site dataset, as an alternative to the inspection of time series data. The method connected each monitoring well's scores through PCA space to account for temporal changes in multiple analytes across the site. The method was used to separate monitoring well locations into categories that included On-track and Unsuccessful based on their similarity to background wells in PCA space. The results agreed with those generated using traditional methods (e.g., time series plots) and were able to efficiently summarize large amounts of data to facilitate interpretation. It is expected that this PCA trajectory method could provide a useful screening tool to quickly identify site-wide trends for the evaluation of ISB performance.","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50142979","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

Stakeholder Participation in High-Resolution Monitoring of Salt Contamination 利益相关者参与高分辨率盐污染监测

IF 1.9 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2023-03-13 DOI: 10.1111/gwmr.12571

Meredith J. Metcalf, Mark A. Higgins, Gary A. Robbins

{"title":"Stakeholder Participation in High-Resolution Monitoring of Salt Contamination","authors":"Meredith J. Metcalf, Mark A. Higgins, Gary A. Robbins","doi":"10.1111/gwmr.12571","DOIUrl":"https://doi.org/10.1111/gwmr.12571","url":null,"abstract":"Groundwater contamination of bedrock domestic wells by road salt is an ever-increasing problem in the Northeast United States. Given the many factors that influence salt transport to wells, the timeframe of salt impacts cannot be readily determined. As such, one cannot optimize quarterly monitoring for assessing the extent of a problem, its source or the effectiveness of remedial measures. Although the use of high-frequency monitoring by installing pressure/electrical conductance probes in wells can be conducted to help determining salt contamination changes with time, this can be costly given the application to multiple wells. In addition, there are logistical issues with regard to probe placement in a drinking water well. In this study a stakeholder participated in high-resolution monitoring of salt contamination using a chloride field test kit. The daily stakeholder water quality monitoring was highly correlated to the specific conductance results obtained with a pressure/conductivity probe. Voluntary stakeholder participation in monitoring can offer a lower cost means of high-frequency monitoring of salt contamination changes with time.","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50132023","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

Vadose Zone Soil Flushing for Chromium Remediation: A Laboratory Investigation to Support Field-scale Application 渗流带土壤冲洗铬修复：支持现场应用的实验室调查

IF 1.9 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2023-02-20 DOI: 10.1111/gwmr.12570

James E. Szecsody, Hilary P. Emerson, Amanda R. Lawter, Charles T. Resch, Mark L. Rockhold, Rob D. Mackley, Nikolla P. Qafoku

{"title":"Vadose Zone Soil Flushing for Chromium Remediation: A Laboratory Investigation to Support Field-scale Application","authors":"James E. Szecsody, Hilary P. Emerson, Amanda R. Lawter, Charles T. Resch, Mark L. Rockhold, Rob D. Mackley, Nikolla P. Qafoku","doi":"10.1111/gwmr.12570","DOIUrl":"https://doi.org/10.1111/gwmr.12570","url":null,"abstract":"Cr(VI) flushing from the vadose zone to the groundwater (with subsequent Cr(VI) removal in groundwater by pump-and-treat system) is a promising remedial technique that has recently been used at field scale. This laboratory study was conducted to provide the technical basis to design a field soil flushing strategy. The objectives were to (1) quantify the relationship between sediment Cr(VI) and Cr(III) mass and release rates and subsequent Cr(VI) leaching; (2) investigate different methodologies to maximize Cr(VI) leaching, and (3) investigate methods to minimize leaching of remaining residual Cr. Characterization of Cr-contaminated sediments (Hanford Site, WA) exhibited Cr(VI) showed that leach rates that were correlated to different Cr surface phases. Sediments with low leachable Cr(VI) (<2 μg/g) leached Cr rapidly, so slow infiltration of water in a single pulse was sufficient to leach most Cr. In contrast, sediments with high Cr (2 to 200 μg/g) released some Cr(VI) quickly but 10 to 50% Cr(VI) slowly (tens to hundreds of hours). Efficient unsaturated leaching of these sediments required a different infiltration strategy that includes: multiple slow leach pulses with time between flushing cycles; the use of a surfactant to increase Cr leaching from low-permeability zones, and the use of a reductant (Na-dithionite or Ca-polysulfide) in the final leach water was highly effective at decreasing residual Cr leaching. This study clearly demonstrated that the methodology of basing laboratory Cr flushing on parameters such as Cr release mass and rates could be used to improve the efficiency of soil flushing at field scale.","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12570","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50152628","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

Issue Information – TOC 问题信息-TOC

IF 1.9 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2023-02-18 DOI: 10.1111/gwmr.12459

引用次数: 0