Mineralization of a Fully Halogenated Organic Compound by Persulfate under Conditions Relevant to in Situ Reduction and Oxidation: Reduction of Hexachloroethane by Ethanol Addition Followed by Oxidation.

ABSTRACT: Fully halogenated compounds are difficult to remediate by in situ chemical oxidation (ISCO) because carbon-halogen bonds react very slowly with the species that typically initiate contaminant transformation: sulfate radical (SO₄^•-) and hydroxyl radical (^•OH). To enable the remediation of this class of contaminants by persulfate (S₂O₈^2-)-based ISCO, we employed a two-phase process to dehalogenate and oxidize a representative halogenated compound (i.e., hexachloroethane). In the first phase, a relatively high concentration of ethanol (1.8 M) was added, along with concentrations of S₂O₈^2- that are typically used for ISCO (i.e., 450 mM). Hexachloroethane underwent rapid dehalogenation when carbon

SUBMITTER: Kim TK 

PROVIDER: S-EPMC10501115 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature