Liu, C, Yue, M, Banwart, SA et al. (4 more authors) (2022) Kinetic Modeling for a Novel Permeable Reactive Biobarrier for In Situ Remediation of PAH-Contaminated Groundwater. Journal of Geotechnical and Geoenvironmental Engineering, 148 (5). ISSN 0733-9410
Abstract
Permeable reactive barriers (PRBs) are an environmentally friendly and cost-effective in situ remediation technology that have been used to restore polycyclic aromatic hydrocarbon (PAH)-contaminated groundwater. However, the understanding of removal mechanisms of the pollutant from groundwater remains a challenge due to the complex interactions between microbial evolution, organic carbon kinetics, and multiple chemical reactions. In this study, a one-dimensional reactive transport model was developed to study 450-day column experiments for removal of phenanthrene from groundwater using new PRB materials A (including wheat straw) and B (including coconut shell biochar). The modeling results provided a deeper understanding of the removal process for phenanthrene, and showed that Material B had a higher removal efficiency than Material A over 34 days. The removal efficiency of phenanthrene in both Materials A and B was close to 100% in the PRB system. This was because (1) Material B had a higher adsorption capacity for phenanthrene than Material A, and adsorption played an important role in the short term (e.g., 20 days), whereas biodegradation controlled longer-term removal processes; (2) the biomass in Column B was higher (p<0.05) than that in Column A; and (3) Column B had a higher microbial yield coefficient that could favor longer-term microbial growth and biodegradation activity. Material B might have greater potential than Material A for longer-term remediation performance. The simulated results generally were in agreement with the experimental results and support the development of field-scale pilot testing of these materials for groundwater remediation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 American Society of Civil Engineers. This is an author produced version of an article published in Journal of Geotechnical and Geoenvironmental Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Groundwater management, Mitigation and remediation, Groundwater, Microbes, Kinetics, Field tests, Materials processing, Permeability (material) |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 02 Feb 2022 11:57 |
Last Modified: | 07 May 2024 13:47 |
Status: | Published |
Publisher: | American Society of Civil Engineers |
Identification Number: | 10.1061/(ASCE)GT.1943-5606.0002779 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:183126 |