Ground Water Monitoring and Remediation最新文献

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Leveraging Sequence Stratigraphy to Accelerate Site Remediation: Pliocene Citronelle Formation, Eglin Air Force Base, Florida, USA 利用层序地层学加速场地修复:美国佛罗里达州埃格林空军基地上新世雪铁龙组
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-24 DOI: 10.1111/gwmr.12608
Mike Shultz, Colin Plank, Mark Stapleton, Leo Giannetta, Rick Cramer
{"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}
引用次数: 0
Evaluation of Strategies to Remediate Mixed Wastes at an Industrial Site in Brazil 对巴西某工业场地混合废物修复策略的评估
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-22 DOI: 10.1111/gwmr.12607
Paola Barreto, Maria Lemes, Jimena Jimenez, E. Erin Mack, James Henderson, David L. Freedman
{"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}
引用次数: 0
Go Figure: Tools and Techniques for Displaying Characterization and Remediation Information Go Figure:显示特征和修复信息的工具和技术
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-22 DOI: 10.1111/gwmr.12602
Craig Divine, Zach Wahl, Rachel Stevens, Theresa Guillette, Eric Rogoff
{"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}
引用次数: 0
Forecasting Groundwater Remediation Timeframes: Site-Specific Temporal Monitoring Results May Not Predict Future Performance 预测地下水修复时间框架:特定地点的时间监测结果可能无法预测未来的表现
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-21 DOI: 10.1111/gwmr.12609
Thomas E. McHugh, Charles J. Newell, Lila M. Beckley, David T. Adamson, George E. DeVaull, Matthew A. Lahvis
{"title":"Forecasting Groundwater Remediation Timeframes: Site-Specific Temporal Monitoring Results May Not Predict Future Performance","authors":"Thomas E. McHugh,&nbsp;Charles J. Newell,&nbsp;Lila M. Beckley,&nbsp;David T. Adamson,&nbsp;George E. DeVaull,&nbsp;Matthew A. Lahvis","doi":"10.1111/gwmr.12609","DOIUrl":"10.1111/gwmr.12609","url":null,"abstract":"<p>At contaminated sites, groundwater monitoring results are commonly used (quantitatively or qualitatively) to predict remediation timeframes. If results are predictive, then there should be a strong positive correlation between attenuation rates for the first half of a temporal monitoring record and attenuation rates for the second half of the same record. We utilized the GeoTracker database to evaluate the power of historical groundwater monitoring results to predict future attenuation rates. For two data sets (petroleum and chlorinated solvent), we found a small negative correlation between the first-order concentration vs. time attenuation rate observed during the earlier part of the monitoring record and the later part of the monitoring record: benzene—correlation coefficient (r) = −0.11, methyl tert-butyl ether (MTBE)—r = −0.12, trichloroethene (TCE) = −0.12. For each data set, a small negative correlation between the first-order attenuation rate observed during the earlier part of the monitoring record and the later part of the monitoring record was also observed for a subset of monitoring records exhibiting the best model fits (R<sup>2</sup> &gt; 0.8), a subset with a statistically significant (p &lt; 0.05) positive attenuation rate for the first half of the monitoring record. For the TCE data set, this negative correlation was also observed for a subset of monitoring records with no change in site remedy during the monitoring period (r = −0.22). Our analysis suggests that the historical concentration vs. time attenuation rate for a contaminant at an individual site or monitoring well is a poor predictor of the future rate.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 4","pages":"92-103"},"PeriodicalIF":1.9,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ngwa.onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12609","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135747548","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
Complex Sites Highlight How Far We Have Come—And How Much Remains to be Done 复杂的网站凸显了我们已经走了多远——还有多少工作要做
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-18 DOI: 10.1111/gwmr.12606
J.F. Devlin, Gaisheng Liu, Murray Einarson
{"title":"Complex Sites Highlight How Far We Have Come—And How Much Remains to be Done","authors":"J.F. Devlin,&nbsp;Gaisheng Liu,&nbsp;Murray Einarson","doi":"10.1111/gwmr.12606","DOIUrl":"https://doi.org/10.1111/gwmr.12606","url":null,"abstract":"&lt;p&gt;Confucius is credited with saying that life is really simple but we insist on making it complicated. Flip this upside down and we have a quote that might apply to contaminated sites: “Sites are complicated but we insist on making them simple.” A simple site is one that has not been studied. That being said, some sites present more challenges than others, and these are the ones researchers and practitioners have in mind when they talk about “Complex Sites.” The complexity arises from a number of factors that make up the pantheon of reasons simple site investigations or cleanup efforts fail: multiple contaminants, DNAPL presence, heterogeneous sediments that include low-permeability features, fractured rock or karst, fast flow, chemically aggressive groundwater, deep contamination, and the list goes on. In the early days of contaminant hydrogeology, many of these factors were underappreciated or unrecognized for the challenges they presented, and attempts to remediate sites were unsuccessful, to put it kindly. Since the turn of the millennium, the hydrogeological knowledge base has increased substantially, and new technologies and approaches have been introduced to fully remediate or at least significantly mitigate contamination in the subsurface. In this issue of GWMR, several of these technologies and approaches are presented.&lt;/p&gt;&lt;p&gt;Among the challenges that have been taken on are those of proper characterization and conceptual model development. Examples of this are featured in an article on in situ mineral samplers to track abiotic reactions with chlorinated solvents (Divine et al.) and two articles outlining approaches for developing three-dimensional geological and numerical site models (Lefrancois et al.) and modeling of multicomponent NAPL remediation for decision support (Stewart et al). Batch experiments are conducted to study strategies on how to handle mixed contaminants (Gavazza et al.). An insightful case study is presented to demonstrate how soil excavation can be used innovatively to address a multitude of logistical and technical challenges at a brownfield site (Cohen et al.). Articles describing the most recent developments in thermal remediation and electrokinetic treatment are also featured here (Heron et al.; Riis et al.). These are only a few examples of the articles and features presented in this issue.&lt;/p&gt;&lt;p&gt;The ultimate goal of contaminant hydrogeology is to understand the fate and transport of pollutants in groundwater, and to use that understanding to responsibly mitigate the risk these substances pose to humans and the environment. The complexity and dynamic nature of the subsurface constantly presents us with surprises and routinely drives us to come up with innovative solutions—either in the form of a single case workaround, or in the form of a broadly applicable new technology. The articles featured in this issue present a small sampling of that innovation and progress. The problem of complex sites remains a formid","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"4"},"PeriodicalIF":1.9,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50137049","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
A Complex Brownfields Case Study—The Former Bannister Federal Complex, Kansas City, Missouri 复杂的Brownfields案例研究——密苏里州堪萨斯城前Bannister联邦综合体
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-16 DOI: 10.1111/gwmr.12597
Harvey A. Cohen, Kevin P. Breslin, Michael T. Rafferty
{"title":"A Complex Brownfields Case Study—The Former Bannister Federal Complex, Kansas City, Missouri","authors":"Harvey A. Cohen,&nbsp;Kevin P. Breslin,&nbsp;Michael T. Rafferty","doi":"10.1111/gwmr.12597","DOIUrl":"https://doi.org/10.1111/gwmr.12597","url":null,"abstract":"<p>In November 2017, 225 acres (91 ha) of the former Bannister Federal Complex (BFC) in Kansas City, Missouri were transferred from the Federal Government to Bannister Transformation &amp; Development, LLC (BTD), for demolition; environmental corrective measures; and preparation of the site for redevelopment. This presented a once-in-a-lifetime opportunity to reconfigure groundwater remedies and address long-standing soil contamination issues. The property included more than 40 previously-identified Solid Waste Management Units, 3.9 million square feet (362,000 m<sup>2</sup>) of buildings, subsurface utilities dating back to the 1940s, and an active groundwater containment system. Demolition of buildings and installation of an interim groundwater containment system began almost immediately after property transfer. In 2018, BTD substantially modified its project schedule to incorporate the construction of the first new buildings while demolition and remedial activities were ongoing. By October 2020, construction of the first new warehouse commenced while excavation and capping of contaminated soils, installation of a groundwater containment treatment systems, and abandonment of legacy utilities were still underway. Completion of this work, within the originally planned timeframe, was made possible by factors including up-front multi-year funding, early and ongoing engagement of regulators, an extended 3-year due diligence program and planning stage, and establishment of well-defined environmental targets. Both the soil and groundwater remedies were also designed with the flexibility needed to accommodate unknown conditions, changing schedules, and revisions to the regrading and redevelopment plans. This case study highlights key technical and management factors that led to the successful completion of this complex brownfields remediation project.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"129-138"},"PeriodicalIF":1.9,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50151339","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
Coal Combustion Residuals Regulation 煤燃烧残渣调节
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-12 DOI: 10.1111/gwmr.12605
Charles Job
{"title":"Coal Combustion Residuals Regulation","authors":"Charles Job","doi":"10.1111/gwmr.12605","DOIUrl":"https://doi.org/10.1111/gwmr.12605","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"30-32"},"PeriodicalIF":1.9,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50130217","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
In My Experience: The Lessons from Dispersion—Don't Believe Everything You Read 根据我的经验:分散的教训——不要相信你读到的一切
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-12 DOI: 10.1111/gwmr.12603
John Cherry
{"title":"In My Experience: The Lessons from Dispersion—Don't Believe Everything You Read","authors":"John Cherry","doi":"10.1111/gwmr.12603","DOIUrl":"https://doi.org/10.1111/gwmr.12603","url":null,"abstract":"&lt;p&gt;This note is about my experience investigating and thinking about hydrodynamic dispersion, simply known as dispersion. In keeping with the tried and true practice of academic reductionism, I will constrain the discussion to the relatively simple and idealized case of point-source groundwater plumes in granular deposits with the aim of illustrating some persistent myths and insights about this process, which has attracted so much interest over the past several decades. Dispersion is the most enigmatic topic in hydrogeology and for good reason.&lt;/p&gt;&lt;p&gt;To most hydrogeologists, dispersion refers to mixing of solute concentration during transport of the solutes. It occurs at the plume periphery and, in some cases, internally within the plume. The partial differential equation (the advection-dispersion equation… the ADE), on which nearly all mathematical models (analytical and numerical) for representing solute transport and fate in groundwater are based, does not represent fundamentally the way in which advection and mixing happen in the field. This equation can be useful when simulating bulk plume spreading at a specified point in time but is deeply flawed for the intended purpose of representing plume mixing with background groundwater at the field scale. Although, when used carefully, these models can capture the nature of a contaminant plume for particular purposes at a moment in time, they cannot correctly represent the actual processes that govern the evolution of plumes, in the past or future.&lt;/p&gt;&lt;p&gt;The derivation of the ADE is founded on assumptions that cannot be expected to be met for heterogeneous geologic media and all such media in this context are substantially heterogeneous in their hydraulic conductivity distribution. Solute transport is dependent on the velocity field at a fine spatial scale that can be as small as millimeters or centimeters where molecular diffusion, caused by the local concentration gradients, is the process driving mixing with groundwater at lower solute concentration. This scale is too small for measuring the full velocity field and would require frequent temporal measurements for realistic assessment. Hence, the dispersivity values used in advection-dispersion models are bulk &lt;i&gt;black-box&lt;/i&gt; parameters intended to capture the overall effects of the media heterogeneity. But, when viewed in the context of the spatial and temporal scale diffusive mixing, there are important deviations from the assumptions inherent in the derivation of the ADE. This is a serious matter because a common reason to use mathematical models is for realistic representation of the past as a basis for predicting the future. Moreover, the failures of the ADE to accurately represent the processes, limit model usefulness in exploring parameter interdependencies and sensitivities. In essence, what is published in textbooks about these for “transport and fate” models is, at best, misleading and at worst simply wrong. This has been perpetuated ","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"145-147"},"PeriodicalIF":1.9,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12603","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50130216","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
SERDP & ESTCP Corner: Headlines from the Environmental Restoration Program Area SERDP和ESTCP角:环境恢复计划领域的头条新闻
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-12 DOI: 10.1111/gwmr.12604
Sarah Mass
{"title":"SERDP & ESTCP Corner: Headlines from the Environmental Restoration Program Area","authors":"Sarah Mass","doi":"10.1111/gwmr.12604","DOIUrl":"https://doi.org/10.1111/gwmr.12604","url":null,"abstract":"In Situ Powdered Activated Carbon Amendments May Limit Contaminant Availability for Biodegradation The use of adsorbent media for in situ sequestration of chemicals of concern in groundwater has increased in recent years. Many technology vendors promote the use of adsorbent amendments such as powdered activated carbon (PAC) or colloidal activated carbon (CAC) in situ to sequester chemicals of concern in groundwater and minimize downgradient transport. Sorption to PAC and CAC are well documented; however, many issues regarding the application of amendments in situ are not well understood. In particular, the interactions between sorbent media and subsurface microbiota are largely unknown. Some technology vendors claim that biodegradation is enhanced with the use of amendments, especially when slowrelease nutrients are included as part of the amendment media, but the validity of those claims has not yet been conclusively demonstrated. It is generally believed that chemicals in groundwater need to be in the aqueous phase to be available for biodegradation. Previous studies have reported decreased biodegradation due to decreased chemical bioavailability for sorbed constituents that are typically able to be biodegraded, including petroleum hydrocarbons, polycyclic aromatic hydrocarbons (PAHs), and pesticides. Therefore, it is possible that readily biodegradable compounds may be less available for biodegradation when sorbed to PAC regardless of nutrient availability. In addition, bacterial growth and biofilm formation on granular activated carbon (GAC) is a known problem in the water treatment industry. Bacterial growth can decrease GAC efficacy for chemical adsorption because bacterial growth can reduce the sorption sites available for chemicals. Microbial growth on PAC similarly has the potential to reduce the effective surface area available for chemical sorption. For chemicals such as perfluorooctane sulfonate and perfluorooctanoic acid (PFOA), where sorption is the predominant mechanism for the efficacy of in situ PAC, competition from bacterial growth may be significant. A recently completed SERDP project titled, “Biological Factors Influencing Sorption and Biodegradation of Chemicals of Concern on Particulate/Colloidal Activated Carbon (ER211059),” investigated the interactions between microbiota and PAC. The project team, led by Principal Investigator Dr. Albert Juhasz at the University of South Australia, aimed to answer two main questions: one, are sorbed contaminants available for biodegradation? Two, do bacteria sorbed onto PAC have an impact on sorptive capacity? The team investigated these two questions by constructing flow cells containing model aquifer materials and PAC. The team first performed sorptiondesorptionbiodegradation experiments using phenanthrene, a low molecular weight PAH that is readily biodegraded. The project team added phenanthrene and a Clabeled phenanthrene surrogate to the flow cells until the sorption capacity of th","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"139-141"},"PeriodicalIF":1.9,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50130133","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
Strategies for Bioremediation of Soil from an Industrial Site Exposed to Chlorinated and Nitroaromatic Compounds 接触氯化和硝基芳香化合物的工业场地土壤的生物修复策略
IF 1.9 4区 环境科学与生态学
Ground Water Monitoring and Remediation Pub Date : 2023-07-03 DOI: 10.1111/gwmr.12596
Natanna Melo, Sofia Pimentel Araújo, Suzana de Paula Queiroz Kraus, Line Lomheim, Paola Barreto Quintero, Elizabeth Erin Mack, Elizabeth A. Edwards, Jim Spain, Savia Gavazza
{"title":"Strategies for Bioremediation of Soil from an Industrial Site Exposed to Chlorinated and Nitroaromatic Compounds","authors":"Natanna Melo,&nbsp;Sofia Pimentel Araújo,&nbsp;Suzana de Paula Queiroz Kraus,&nbsp;Line Lomheim,&nbsp;Paola Barreto Quintero,&nbsp;Elizabeth Erin Mack,&nbsp;Elizabeth A. Edwards,&nbsp;Jim Spain,&nbsp;Savia Gavazza","doi":"10.1111/gwmr.12596","DOIUrl":"https://doi.org/10.1111/gwmr.12596","url":null,"abstract":"<p>As technological advances allow the development of new products, the number of synthetic chemical compounds released into the soil, surface water and groundwater increases, posing a threat to the environment. Therefore, treatability studies to improve bioremediation strategies (biostimulation and bioaugmentation) were applied to samples of soil containing nitro and chlorinated aromatic compounds from a former chemical manufacturing site in Brazil. Native microorganisms were stimulated to degrade compounds including dichloroanilines, dichloronitrobenzenes, 2-chloronitrobenzene, and 1,2-chlorobenzene, through oxygen exposure and pH (6.0-8.4) and moisture content (13-23%) adjustments. For the inoculation of soil samples, a culture enriched from site groundwater was developed. The aeration alone stimulated the indigenous microbes to degrade some of the compounds. However, reinoculation with an enriched culture and moisture content adjustment increased the attenuation rates by 3.6 and 1.4 times, respectively. The pH values in the range of 7.6 and 8.4 seem not to harm microbes' activity and moisture content higher than 16% is recommended to enhance biodegradation. Based on the findings, it is likely that natural attenuation is happening in aerobic zones at the site. Results indicate both bioremediation strategies (biostimulation and bioaugmentation through reinoculation with enriched culture mainly composed of organisms from the <i>Diaphorobacter</i> genus) are promising strategies to enhance bioremediation. However, considering the applicability of the strategies on a field scale, further experiments will broaden the understanding of biodegradability of compounds, such as their inhibitory effects when in higher concentration (&gt;150 mg/kg), individually or combined.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"43 3","pages":"108-120"},"PeriodicalIF":1.9,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50119145","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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