Use of organic amendments derived from biosolids for groundwater remediation of TCE

Ghandehari, Shahrzad Saffari; Boyer, Jessica; Ronin, Dana; White, James R.; Hapeman, Cathleen J.; Jackson, D. Michael; Kaya, Devrim; Torrents, Alba; Kjellerup, Birthe V.

doi:10.1016/j.chemosphere.2023.138059

Cited by 2 publications

(3 citation statements)

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“…Therefore, a trench was installed upgradient of the biowall in 2020 to address these challenges. Bench scale studies were conducted, before installation of the trench, to analyze the effect of the proposed trench materials (Saffari Ghandehari et al, 2023): limestone to increase the pH and also provide buffer capacity for a long‐term, biosolids to increase the organic carbon content in the groundwater and to act as an adsorbent, and biochar to increase the adsorption of TCE and its degradation products, which can also increase effective surface area for the bacteria to adsorb. The final trench material consisted of a 50%–50% (by volume) mixture of limestone and biosolids and approximately 1.5% crushed biochar.…”

Section: Discussionmentioning

confidence: 99%

Section: Pmp Improvementsmentioning

confidence: 99%

“…How to cite this article: Ghandehari, S. S., Cheng, S.-H., Hapeman, C. J., Torrents, A., & Kjellerup, B. V. (2023).…”

Section: Acknowledgmentsmentioning

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: Discussionmentioning

confidence: 99%

Section: Pmp Improvementsmentioning

confidence: 99%