Enhanced degradation of trichloroethene by calcium peroxide activated with Fe(III) in the presence of citric acid.

ABSTRACT: Trichloroethene (TCE) degradation by Fe(III)-activated calcium peroxide (CP) in the presence of citric acid (CA) in aqueous solution was investigated. The results demonstrated that the presence of CA enhanced TCE degradation significantly by increasing the concentration of soluble Fe(III) and promoting H₂O₂ generation. The generation of HO• and O₂^-• in both the CP/Fe(III) and CP/Fe(III)/CA systems was confirmed with chemical probes. The results of radical scavenging tests showed that TCE degradation was due predominantly o direct oxidation by HO•, while O₂^-• strengthened the generation of HO• by promoting Fe(III) transformation in the CP/Fe(III)/CA system. Acidic pH conditions were favorable for TCE degradation, and the TCE

SUBMITTER: Zhang X 

PROVIDER: S-EPMC5613293 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature