4.8 Article

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

Journal

WATER RESEARCH
Volume 138, Issue -, Pages 118-128

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2018.03.033

Keywords

In situ bioremediation; pcpB gene; Pentachlorophenol hydroxylase; Quantitative PCR; Ion PGM amplicon sequencing; Sphingomonas sensu lato

Funding

  1. Academy of Finland [139847, 260797]
  2. European Research Council under the European Union's Seventh Framework Programme [615146]
  3. Koskinen Oy
  4. Academy of Finland (AKA) [260797, 139847, 260797, 139847] Funding Source: Academy of Finland (AKA)

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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 mu gL(-1) to

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