Indraratna, B, Medawela, S, Rowe, RK et al. (2 more authors) (2020) Biogeochemical Clogging of Permeable Reactive Barriers in Acid-Sulfate Soil Floodplain. Journal of Geotechnical and Geoenvironmental Engineering, 146 (5). 04020015. ISSN 1090-0241
Abstract
Column experiments that investigate the use of calcitic limestone as a potential material for permeable reactive barriers (PRBs), as well as its clogging behavior, are conducted under conditions that involve continuous acidic flow containing Al, Fe, and acidophilic bacteria. Results show that nonhomogenous biogeochemical clogging occurred toward the outlet, resulting in a 45% reduction of hydraulic conductivity at the inlet and 10% reduction at the outlet after the bicarbonate buffering period. A mathematical model developed to capture the reductions in longevity is presented. The model, which considers the effects of time-varying porosity, hydraulic conductivity, and head at a particular point on the horizontal flow path, is used for assessing the effect of coupled clogging in a calcitic porous medium.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | ©2020 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: | Permeable reactive barrier (PRB); Acidic groundwater; Chemical clogging; Biological clogging |
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 Mar 2020 14:38 |
Last Modified: | 25 Mar 2020 02:45 |
Status: | Published |
Publisher: | American Society of Civil Engineers |
Identification Number: | 10.1061/(ASCE)GT.1943-5606.0002231 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:157834 |