An innovative permeable reactive bio-barrier to remediate trichloroethene-contaminated groundwater: A field study.

Autor: Lu CW; Department of Life Sciences, National Central University, Taoyuan 32001, Taiwan., Lo KH; Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan., Wang SC; Systems Biology and Bioinformatics Institute, National Central University, Taoyuan 32001, Taiwan., Kao CM; Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan. Electronic address: jkao@mail.nsysu.edu.tw., Chen SC; Department of Life Sciences, National Central University, Taoyuan 32001, Taiwan. Electronic address: chensc512@gmail.com.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Apr 10; Vol. 920, pp. 170885. Date of Electronic Publication: 2024 Feb 09.
DOI: 10.1016/j.scitotenv.2024.170885
Abstrakt: Permeable reactive bio-barrier (PRBB), an innovative technology, could treat many contaminants via the natural gradient flow of groundwater based on immobilization or transformation of pollutants into less toxic and harmful forms. In this field study, we developed an innovative PRBB system comprising immobilized Dehalococcoides mccartyi (Dhc) and Clostridium butyricum embedded into the silica gel for long-term treatment of trichloroethene (TCE) polluted groundwater. Four injection wells and two monitoring wells were installed at the downstream of the TCE plume. Without PRBB, results showed that the TCE (6.23 ± 0.43 μmole/L) was converted to cis-dichloroethene (0.52 ± 0.63 μmole/L), and ethene was not detected, whereas TCE was completely converted to ethene (3.31 μmole/L) with PRBB treatment, indicating that PRBB could promote complete dechlorination of TCE. Noticeably, PRBB showed the long-term capability to maintain a high dechlorinating efficiency for TCE removal during the 300-day operational period. Furthermore, with qPCR analysis, the PRBB application could stably maintain the populations of Dhc and functional genes (bvcA, tceA, and vcrA) at >10 8 copies/L within the remediation course and change the bacterial communities in the contaminated groundwater. We concluded that our PRBB was first set up for cleaning up TCE-contaminated groundwater in a field trial.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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