Effects of ferrous iron supplementation on reductive dechlorination of tetrachloroethene and on methanogenic microbial community.

ABSTRACT: Chloroethenes are common soil and groundwater pollutants. Their dechlorination is impacted by environmental factors, such as the presence of metal ions. We here investigated the effect of ferrous iron on bacterial reductive dechlorination of chloroethenes and on methanogen community. Reductive dechlorination of tetrachloroethene was assayed with a groundwater sample originally containing 6.3 × 103 copies mL-1 of Dehalococcoides 16S rRNA gene and 2 mg L-1 of iron. Supplementation with 28 mg L-1 of ferrous iron enhanced the reductive dechlorination of cis-dichloroethene (cis-DCE) and vinyl chloride in the presence of methanogens. The supplementation shortened the time required for complete dechlorination of 1 mg L-1 of tetrachloroethene to ethene and ethane from 84 to 49 d. Methanogens, such

SUBMITTER: Yoshikawa M 

PROVIDER: S-EPMC8139862 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature