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IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-04-11 DOI: 10.1111/gwmr.12714

Mike Price

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Evaluating Mineral and In Situ Indicators of Abiotic Dechlorination in Clayey Soils 粘性土非生物脱氯的矿物和原位指标评价

IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-03-19 DOI: 10.1111/gwmr.12709

Charles E. Schaefer, Danielle Tran, Dung Nguyen, Drew E. Latta, Charles J. Werth

{"title":"Evaluating Mineral and In Situ Indicators of Abiotic Dechlorination in Clayey Soils","authors":"Charles E. Schaefer, Danielle Tran, Dung Nguyen, Drew E. Latta, Charles J. Werth","doi":"10.1111/gwmr.12709","DOIUrl":"10.1111/gwmr.12709","url":null,"abstract":"Naturally occurring abiotic dechlorination reactions in clayey soils can serve as an important attenuation mechanism for groundwaters impacted by chlorinated solvents such as trichloroethene (TCE). Potential abiotic reactions include both reductive (anoxic) and oxidative (oxic) dechlorination reactions that are facilitated by ferrous minerals. However, tools to provide lines of evidence for such reactions, and ultimately screening-level estimates of dechlorination rate constants that can be incorporated into site fate and transport models, are yet to be widely accepted for these clayey systems. Herein, coupled bench- and field-scale testing at nine locations within the saturated zone showed that measurement of reduced gases in field-collected clayey samples was inconclusive for indicating in situ abiotic reductive dechlorination. However, the use of 1% (v/v) HCl extractions and X-ray diffraction (XRD) for mineral composition provided the information needed to estimate TCE abiotic reductive dechlorination in clays, thereby serving as a potential screening tool for site investigation. While a corresponding screening tool for estimating abiotic oxidative dechlorination in clay was not demonstrated, the rate of hydroxyl radical generation measured for each clay in batch experiments was correlated to in situ hydrogen peroxide concentrations measured in groundwater near the sand-clay interface. Thus, this observation provides (to our knowledge) a first line of evidence that ongoing reactive oxygen species generation is occurring in situ near the sand–clay (oxic–anoxic) interface, potentially serving as a means to facilitate abiotic oxidative dechlorination and mitigate back-diffusion of chlorinated solvents from clay.","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"45 2","pages":"31-39"},"PeriodicalIF":1.3,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091803","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}

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Is Microbially Produced Dissolved Organic Carbon a Missing Link in Natural Attenuation? 微生物产生的溶解有机碳是自然衰减的缺失环节吗？

IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-03-04 DOI: 10.1111/gwmr.12710

Kirk O'Reilly, Dawn Zemo, Rachel Mohler

{"title":"Is Microbially Produced Dissolved Organic Carbon a Missing Link in Natural Attenuation?","authors":"Kirk O'Reilly, Dawn Zemo, Rachel Mohler","doi":"10.1111/gwmr.12710","DOIUrl":"10.1111/gwmr.12710","url":null,"abstract":"Our research program characterizes dissolved organic carbon (DOC) generated in association with in-situ hydrocarbon biodegradation. While this DOC has been thought to consist primarily of degradation intermediates, high-resolution mass spectrometry (HRMS) analysis of samples collected from the USGS's Bemidji research site indicates that most of the chemical formulae identified in DOC collected from impacted wells are also found in unimpacted water samples. We recently proposed that the DOC consists primarily of microbial products generated as a result of de novo synthesis by organisms growing on carbon supplied by the oil and is chemically consistent with naturally occurring DOC. In this note, we further evaluated our HRMS results focusing on two electrochemical characteristics: identification of potential redox pairs and the distribution of the average oxidation state of the carbon in HRMS-identified formulae. We hypothesize that microbially produced DOC acts as a pool of carbon compounds with a continuum of oxidation states that serves as a reversible electron buffer with the ability to accept, store, and donate electrons depending on redox conditions. This allows hydrocarbon oxidation that is disconnected in time and space from the reduction of the terminal electron acceptors (TEAs), such as oxygen, Fe3+, or sulfate. Given that concentrations of DOC may be high relative to concentrations of dissolved hydrocarbons and TEAs, it suggests that microbially produced DOC may be a missing link in understanding the carbon and electron balance at sites undergoing natural attenuation.","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"45 2","pages":"81-87"},"PeriodicalIF":1.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091460","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}

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Featured Products 主打产品

IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-02-18 DOI: 10.1111/gwmr.12700

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IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-02-18 DOI: 10.1111/gwmr.12706

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Solutions for Managing Aqueous Film-Forming Foam-(AFFF-) Impacted Infrastructure 管理水成膜泡沫（AFFF）影响基础设施的解决方案

IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-02-07 DOI: 10.1111/gwmr.12703

Craig Divine, Johnsie Lang, Amanda Klaben, Stephanie Fiorenza, Shashank Singh Kalra, Lauren March, John Poolton, John Anderson, Baxter Miatke, Jonathan Miles

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Determining PFAA Plume Stability Condition Quickly and Efficiently 快速有效地确定PFAA羽流稳定条件

IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-02-07 DOI: 10.1111/gwmr.12707

Thomas E. McHugh, David T. Adamson, Blake W. Actkinson, Charles J. Newell

{"title":"Determining PFAA Plume Stability Condition Quickly and Efficiently","authors":"Thomas E. McHugh, David T. Adamson, Blake W. Actkinson, Charles J. Newell","doi":"10.1111/gwmr.12707","DOIUrl":"10.1111/gwmr.12707","url":null,"abstract":"While petroleum plumes and even many chlorinated solvent plumes stabilize in size on a time scale of a few to several years, perfluoroalkyl and polyfluoroalkyl substances, particularly perfluoroalkyl acids (PFAAs), in groundwater pose a specific challenge for site investigation and remediation due to their recalcitrance, which creates a potential for much longer-term plume expansion. Understanding the plume stability condition (i.e., is the plume expanding, stable, or shrinking) is essential for plume management and remedy selection, but resolving this trend using conventional monitoring methods can take 5 to 10 years or longer at many sites. This paper explores the difficulties in determining plume stability condition and presents four tools for evaluating stability condition more quickly and more efficiently: (1) high-resolution spatial sampling, (2) high-volume sampling, (3) passive integrative samplers, and (4) statistically based high-frequency sampling. By employing these tools, site managers can optimize monitoring strategies to quickly discern if and how much PFAA plume expansion is occurring and make timely informed decisions regarding PFAA plume management.","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"45 1","pages":"68-79"},"PeriodicalIF":1.3,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431205","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}

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In My Experience: Where the Subsurface is Concerned, Expect the Unexpected and Adapt to it 根据我的经验：在涉及地下的地方，期待意外并适应它

IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-02-03 DOI: 10.1111/gwmr.12699

Mark Ferrey

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SERDP & ESTCP Corner: Headlines from the Environmental Restoration Program Area SERDP & ESTCP角：来自环境恢复计划领域的头条新闻

IF 1.3 4区环境科学与生态学

Ground Water Monitoring and Remediation Pub Date : 2025-01-31 DOI: 10.1111/gwmr.12701

Sarah Mass

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