Successful aerobic bioremediation of groundwater contaminated with higher chlorinated phenols by indigenous degrader bacteria

The xenobiotic priority pollutant pentachlorophenol has been used as a timber preservative in a polychlorophenol bulk synthesis product containing also tetrachlorophenol and trichlorophenol. Highly soluble chlorophenol salts have leaked into groundwater, causing severe contamination of large aquifer...

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Bibliographic Details
Published in:Water research (Oxford) 2018-07, Vol.138, p.118-128
Main Authors: Mikkonen, Anu, Yläranta, Kati, Tiirola, Marja, Dutra, Lara Ambrosio Leal, Salmi, Pauliina, Romantschuk, Martin, Copley, Shelley, Ikäheimo, Jukka, Sinkkonen, Aki
Format: Article
Language:English
Subjects:
In situ bioremediation
Ion PGM amplicon sequencing
pcpB gene
Pentachlorophenol hydroxylase
Quantitative PCR
Sphingomonas sensu lato
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Summary:The xenobiotic priority pollutant pentachlorophenol has been used as a timber preservative in a polychlorophenol bulk synthesis product containing also tetrachlorophenol and trichlorophenol. Highly soluble chlorophenol salts have leaked into groundwater, causing severe contamination of large aquifers. Natural attenuation of higher-chlorinated phenols (HCPs: pentachlorophenol + tetrachlorophenol) at historically polluted sites has been inefficient, but a 4-year full scale in situ biostimulation of a chlorophenol-contaminated aquifer by circulation and re-infiltration of aerated groundwater was remarkably successful: pentachlorophenol decreased from 400 μg L−1 to
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2018.03.033