Ground Water Monitoring and Remediation最新文献

{"title":"Bioremediation of Chlorate and Chromium Contamination with Native Microbial Culture in Cold Climate","authors":"Mehdi Motevasselin,&nbsp;Beata Gorczyca,&nbsp;Indra Kalinovich,&nbsp;Richard Sparling","doi":"10.1111/gwmr.12610","DOIUrl":"10.1111/gwmr.12610","url":null,"abstract":"<p>Chlorate and hexavalent chromium are two chemicals with adverse health effects that may cause groundwater contamination in industrial areas. The objective of this study was to determine if the native microorganisms collected from a site contaminated with chlorate and chromate can lower the concentration of these chemicals in groundwater to acceptable regulatory levels. Several anaerobic microcosm experiments were conducted with synthetic groundwater (media), native microorganisms, acetate as an electron donor, nitrogen, phosphorus, and minerals. The microorganisms utilized 2200 mg/L acetate to remove 1000 mg/L of chlorate and 3 mg/L of hexavalent chromium entirely from the media provided that the groundwater is supplemented with additional nitrogen and phosphorous (with the Carbon:Nitrogen:Phosphorous molar ratio of 100:10:5). The added trace minerals solution prepared based on American Type Culture Collection (ATCC) 1191 medium did not improve the remediation process. Native microbial culture derived from the contaminated site removed the chlorate and chromate from the synthetic groundwater at 20 °C in about 40 days. The same removal was achieved at 10 °C, but in a longer timespan of 80 days. This work confirmed the importance of ensuring the presence of sufficient N and P to stimulate chlorate- and chromate-reducing bacteria in the groundwaters.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 1","pages":"46-56"},"PeriodicalIF":1.9,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12610","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126377016","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}

{"title":"A Monte-Carlo Chemical Budget Approach to Assess Ambient Groundwater Flow in Bedrock Open Boreholes","authors":"Philip T. Harte","doi":"10.1111/gwmr.12611","DOIUrl":"10.1111/gwmr.12611","url":null,"abstract":"<p>In low-permeability rocks, ambient groundwater flow in open boreholes may go undetected using conventional borehole-flowmeter tools and alternative approaches may be needed to identify flow. Understanding ambient flow in open boreholes is important for tracking of cross contamination in groundwater. Chlorinated volatile organic compound (CVOC) concentrations from three open boreholes set in a crystalline-rock aquifer (two of three open boreholes) and a siltstone aquifer (one of three open boreholes) were examined using a new approach and associated software program called the AFCE (Aqueous-Flow-Concentration-Estimator). The program allows comparison of coupled chemical datasets through a Monte-Carlo simulation and a chemical-budget approach to assess ambient groundwater flow in open boreholes. The coupled datasets required for the comparison include aqueous CVOC concentrations from groundwater samples from (1) discrete fractures, such as those measured from temporary deployment of straddle-borehole packer assemblies; and (2) the concentration of the open borehole (wellbore) water, as measured by a vertical profile of passive samplers from within the same open borehole. Because results from the passive samplers represent a composite mixture of the results from the discrete samples under ambient groundwater-flow conditions, potentially at unknown proportions, the comparison between coupled datasets affords the ability to discern likely water contributions of CVOC from discrete fractures (or fracture zones), and which fractures may be dominating the water chemistry of the open borehole.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 1","pages":"57-71"},"PeriodicalIF":1.9,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124540844","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}

{"title":"Newsline","authors":"","doi":"10.1111/gwmr.12598","DOIUrl":"https://doi.org/10.1111/gwmr.12598","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"5-11"},"PeriodicalIF":1.9,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149360","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}

{"title":"Issue Information - ISSN page","authors":"","doi":"10.1111/gwmr.12462","DOIUrl":"https://doi.org/10.1111/gwmr.12462","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"3"},"PeriodicalIF":1.9,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12462","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149363","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}

{"title":"Featured Products","authors":"","doi":"10.1111/gwmr.12601","DOIUrl":"https://doi.org/10.1111/gwmr.12601","url":null,"abstract":"Johnson Screens announces an addition to the NuWell® well cleaning and development chemical portfolio, a staple of its historic Water Well division. ChlorSafe is a safe and effective alternative to traditional chlorine (bleach) for disinfecting water wells. Like all NuWell products used within the well, ChlorSafe NW420 is NSFcertified for potable water use (certified by NSF to NSF/ANSI/ CAN 60). The dry, granular product is used to disinfect wells without needing pH control, is simple to use, and boasts a long shelf life. ChlorSafe is added to a water container at the surface and dissolved before disbursing to the entire well. That ensures the chemical is in solution before putting it downhole, effectively allowing the ChlorSafe to combat bacteria throughout the well. www.johns onscr eens.com Geoprobe 3100GT Eliminates Class A/B CDL Requirement While Still Producing Like Conventional Rig","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"143-144"},"PeriodicalIF":1.9,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149359","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}

{"title":"Newsmakers","authors":"","doi":"10.1111/gwmr.12599","DOIUrl":"https://doi.org/10.1111/gwmr.12599","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"142"},"PeriodicalIF":1.9,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149358","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}

{"title":"NGWA News","authors":"","doi":"10.1111/gwmr.12600","DOIUrl":"https://doi.org/10.1111/gwmr.12600","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"12-13"},"PeriodicalIF":1.9,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149361","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}

{"title":"Leveraging Sequence Stratigraphy to Accelerate Site Remediation: Pliocene Citronelle Formation, Eglin Air Force Base, Florida, USA","authors":"Mike Shultz,&nbsp;Colin Plank,&nbsp;Mark Stapleton,&nbsp;Leo Giannetta,&nbsp;Rick Cramer","doi":"10.1111/gwmr.12608","DOIUrl":"https://doi.org/10.1111/gwmr.12608","url":null,"abstract":"<p>At Eglin Air Force Base (AFB) in the Florida Panhandle, a groundwater extraction and treatment system was installed to contain and remediate a chlorinated solvent plume. After 2 years of operation, the system was not removing the contaminant mass at the rate predicted or required to meet performance-based contract terms. As a result, a sequence-stratigraphic analysis was initiated to develop a strategy to improve performance. Sequence Stratigraphy methods were employed to identify a marine flooding surface (mfs) formed during a relative sea level highstand. The analysis also found that the mfs was locally eroded away, indicating that incised valleys were eroded into the formation during a relative lowstand of sea level. These valleys were backfilled with coarse-grained fluvial and estuarine strata. The analysis concluded that the groundwater extraction system lacked an extraction well screened within the coarse-grained valley fill. An additional extraction well was installed, which targeted the incised valley fill and resulted in a significant increase in contaminant mass removal rate without increasing system capacity or operational costs. This case study suggests that efficiency improvements are tenable at many sites where groundwater remediation is occurring within the Surficial Aquifer System of the Gulf Coast (Citronelle Formation) as well as sites in similar geologic settings worldwide.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"79-92"},"PeriodicalIF":1.9,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12608","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50153969","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}

{"title":"Evaluation of Strategies to Remediate Mixed Wastes at an Industrial Site in Brazil","authors":"Paola Barreto,&nbsp;Maria Lemes,&nbsp;Jimena Jimenez,&nbsp;E. Erin Mack,&nbsp;James Henderson,&nbsp;David L. Freedman","doi":"10.1111/gwmr.12607","DOIUrl":"https://doi.org/10.1111/gwmr.12607","url":null,"abstract":"<p>Complex mixtures of contaminants at hazardous waste sites often pose significant challenges for remediation. For example, within the largest industrial area in northeastern Brazil, one of the sites is contaminated with at least 26 chemicals, six of which are present in the part per million range: chlorobenzene (CB), 1,2-dichlorobenzene (1,2-DCB), 4-nitrotoluene (4-NT), 2,6-dinitrotoluene (2,6-DNT), 4-isopropylaniline (4-IPA), and 1,2-dichloroethane (1,2-DCA). Other chemicals of concern include 2,4-dinitrotoluene (2,4-DNT), 2- and 3-nitrotoluene (NT), and 1,4-dioxane. The objective of this study was to evaluate remediation strategies that include aerobic and anaerobic biodegradation, along with chemical reduction and oxidation. In microcosms prepared with site soil and groundwater, aerobic biodegradation of CB, 1,2-DCB, 2-NT, 3-NT, and 4-NT was demonstrated, while the dinitrotoluene isomers, 1,2-DCA, and 1,4-dioxane were recalcitrant. 2,6-DNT, 2,4-DNT, and 4-NT were readily reduced to amino-toluenes under anaerobic conditions by microbes with lactate serving as the electron donor or using zero valent iron. Amino-toluenes were amenable to chemical oxidation and/or aerobic biodegradation. This suggests a sequential treatment strategy may be the most effective remediation approach, consisting of aerobic biodegradation, followed by anaerobic reduction (abiotic or biotic) and then aerobic biodegradation and/or chemical oxidation. This approach was the most effective in a continuous flow column experiment using site soil. Batch tests with mixtures of contaminants as well as groundwater exposed to chemical oxidation revealed modest to no inhibitory effects. While these mixtures may slow the rate of biodegradation, a remediation strategy that incorporates aerobic and anaerobic biodegradation is achievable.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"93-107"},"PeriodicalIF":1.9,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12607","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149432","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}

{"title":"Go Figure: Tools and Techniques for Displaying Characterization and Remediation Information","authors":"Craig Divine,&nbsp;Zach Wahl,&nbsp;Rachel Stevens,&nbsp;Theresa Guillette,&nbsp;Eric Rogoff","doi":"10.1111/gwmr.12602","DOIUrl":"https://doi.org/10.1111/gwmr.12602","url":null,"abstract":"Introduction The methods for collecting, analyzing, and displaying data have changed over time; however, the underlying goal of visualizing data has not: enabling easy interpretation of complex data. The advent of statistical graphics, such as line charts in the 18th century, demonstrated that visualizations could convey results more quickly and clearly than prose (Tufte 2001). The early data visualizations were an important step toward clearly communicating results from complex data, but they were hand drawn and time consuming to create. They required significant planning and were not easily manipulated or modified after the figure was created. These limitations persisted in the environmental remediation field for certain data visualizations (e.g., geologic cross sections) until very recently. Remediation and characterization visualizations have also historically relied on relatively sparse data sets that necessitate significant interpolation which can lead to data misrepresentation. For example, older figures showing contaminant plume boundaries using limited data typically oversimplified plume shapes, and older geologic cross sections understated the importance of geologic heterogeneity. New data visualization tools have alleviated many of these issues and can more effectively display and communicate complex results. One reason these new digital tools are successful is that they are commonly interactive. For example, dashboards (i.e., interactive figures that convey related information in an easytounderstand format) allow analytes and date ranges to be selected in real time for a graph, which increases the data an audience can view on a single visualization. Some digital tools can also display data in multiple dimensions. This is particularly helpful in the remediation field where projects require understanding of contaminant distributions in space (three dimensions) and over time (a fourth dimension). New data visualization tools also allow the analysis of data from more locations (i.e., higher resolution) and displaying different types of data (i.e., multivariate). This is important as we collect more data than at any point in the history of the field. New field instruments measure new parameters, many of which report data at incredibly high time frequencies (e.g., multiple times a second). New site characterization tools can record data at small scales (e.g., centimeter spacing) for the entire length of a soil boring. Digital field data collection results in more data available for analysis compared to manual collection methods. These all result in a larger quantity of data that is reported near realtime, which was impossible to visualize until relatively recently. These new tools also enable us to customize our visualizations for the planned users or target audience. In the remediation field, stakeholder groups can be broad, with diverse technical backgrounds, project roles, and perspectives. The goals of displaying data vary depending on ","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"14-29"},"PeriodicalIF":1.9,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50149433","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}