Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide.

ABSTRACT: The enhancement effect of an environmentally friendly reducing agent, ascorbic acid (AA), on trichloroethene (TCE) degradation by Fe(III)-activated calcium peroxide (CP) was evaluated. The addition of AA accelerated the transformation of Fe(III) to Fe(II), and the complexation of Fe(III)/Fe(II) with AA and its products alleviated the precipitation of dissolved iron. These impacts enhanced the generation of reactive oxygen species (ROSs). Investigation of ROSs using chemical probe tests, electron paramagnetic resonance (EPR) tests, and radical scavenger tests strongly confirm large production of hydroxyl radicals (HO•) that is responsible for TCE degradation. The generation of Cl^- from the degraded TCE was complete in the enhanced CP/Fe(III)/AA system. The investigation of soluti

SUBMITTER: Zhang X 

PROVIDER: S-EPMC5665388 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature