Permeable Organic Biowalls for Remediation Of Perchlorate in Groundwater

Henry, Bruce M.; Perlmutter, Michael W.; Downey, Douglas C.

doi:10.1007/978-0-387-84921-8_9

Cited by 4 publications

(12 citation statements)

References 4 publications

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“…The wood mulch consisted of mostly cellulose and, in the biowall, can provide electron donors, which can then be used for hydrogen production and consequently in organohalide respiration of chlorinated ethenes. Composted plant materials are a more rapidly degradable organic carbon source, compared to the cellulose of the mulch, and are more readily available to the microbial community (Henry, 2008;Niño de Guzman, 2018). In addition, the humic acids in the mulch and compost can act as electron shuttles and reduce different compounds, such as ferric iron to ferrous iron (BMT Designers & Planners Inc., 2017b;Henry, 2008;Nevin & Lovley, 2000; Niño de Guzmán, .…”

Section: Biowall Materialsmentioning

confidence: 99%

“…Composted plant materials are a more rapidly degradable organic carbon source, compared to the cellulose of the mulch, and are more readily available to the microbial community (Henry, 2008;Niño de Guzman, 2018). In addition, the humic acids in the mulch and compost can act as electron shuttles and reduce different compounds, such as ferric iron to ferrous iron (BMT Designers & Planners Inc., 2017b;Henry, 2008;Nevin & Lovley, 2000; Niño de Guzmán, . Due to the strong reductive effects, ZVI has also been used for TCE degradation both in the laboratory and in the field in different forms (e.g., particles, nanoparticles, and emulsified) (Hara et al, 2006;He et al, 2010;Velimirovic et al, 2018).…”

Section: Biowall Materialsmentioning

confidence: 99%

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Ensuring the continued success of a mulch biowall at a trichloroethylene‐contaminated superfund site: Lessons learned

Ghandehari

Cheng

Hapeman

et al. 2023

Remediation Journal

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Trichloroethylene (TCE) is a toxic organic compound, which can adversely affect human health. The chemical is one of the most frequently found contaminants in groundwater in the United States and around the world. A landfill in Maryland contaminated with high levels of TCE decades ago was added to the National Priority List (NPL) in 1994 for clean up. A biowall was installed on the site in 2013 to promote the bioremediation of TCE and subsequently of its degradation products. Six‐year monitoring data indicated a steady removal of >99% groundwater TCE at the wall since installation. However, a concurrent buildup of intermediate byproducts was observed downgradient of the wall. An examination of the entire system was necessary to find the reason behind the inefficiency of the biowall. In this study, the background of the site, remediation plan, and installation were assessed. Monitoring data, including the concentration of TCE and its degradation byproducts, and geochemical and physical characteristics were evaluated to understand the conditions and challenges facing decision‐makers of this project and possible options to improve biowall efficacy.

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Section: Biowall Materialsmentioning

confidence: 99%

Section: Biowall Materialsmentioning

confidence: 99%

Ensuring the continued success of a mulch biowall at a trichloroethylene‐contaminated superfund site: Lessons learned

Ghandehari

Cheng

Hapeman

et al. 2023

Remediation Journal

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“…Because dissolved organic carbon is released by mulch biowalls, an additional treatment zone is created immediately downgradient of the biowall. To date, biowall field demonstrations have been carried out to treat a variety of electrophilic groundwater contaminants, including nitrate (Robertson & Cherry, 1995), acid mine drainage (Benner et al, 1997(Benner et al, , 1999Robertson & Anderson, 1999;Robertson et al, 2000), chlorinated solvents (Aziz et al, 2001;Haas et al, 2000;Henry et al, 2003), and perchlorate (Henry et al, 2008;Xu et al, 2003).…”

Section: Shahla K Farhatmentioning

confidence: 99%

Treatment of an explosives plume in groundwater using an organic mulch biowall

Ahmad¹,

Adamson

Farhat

2009

Remediation Journal

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“…Several factors should be considered when designing PRB configurations. Among the field conditions, the hydrogeological properties of the aquifer, such as hydraulic conductivity, hydraulic gradient, and aquifer heterogeneity are important factors that determine PRB performance [33][34][35]. The design of PRBs should also consider the levels of contamination, sizes, and depths of contaminant plumes that need to be remediated [36,37].…”

Section: Introductionmentioning

confidence: 99%

Configuration of Non-Pumping Reactive Wells Considering Minimum Well Spacing

et al. 2021

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A non-pumping reactive well (NPRW) is a subsurface structure that prevents contaminant spread using many non-pumping wells containing reactive media. For the construction of an effective NPRW, a sufficiently small spacing between wells is an important design factor to prevent contaminant leakage. However, close well construction is not recommended because of concerns about the decreased stability of adjacent wells under field conditions. In this research, we proposed a sawtooth array of NPRW as a practical configuration to minimize well spacing while meeting stability requirements in the field. To evaluate the performance of the novel NPRW configurations, a numerical modeling was conducted considering different well diameters and well spacings and their performance was compared taking into account the number of wells and the mass of the reactive material. The comparison results showed that the sawtooth configuration was more practical than a line of wells. The performance curve of NPRWs with the saw-toothed configuration was constructed from the relationship between the contaminant removal and configuration components (diameter and spacing of the well). This can be used to predict the contaminant removal performance of NPRWs with a sawtooth array.

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Permeable Organic Biowalls for Remediation Of Perchlorate in Groundwater

Cited by 4 publications

References 4 publications

Ensuring the continued success of a mulch biowall at a trichloroethylene‐contaminated superfund site: Lessons learned

Ensuring the continued success of a mulch biowall at a trichloroethylene‐contaminated superfund site: Lessons learned

Treatment of an explosives plume in groundwater using an organic mulch biowall

Configuration of Non-Pumping Reactive Wells Considering Minimum Well Spacing

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