Degradation of trichloroethylene in aqueous solution by nanoscale calcium peroxide in the Fe(II)-based catalytic environments.

ABSTRACT: In this study, nCaO₂ was synthesized successfully and applied in the Fe(II)-based catalytic environments in investigating trichloroethylene (TCE) removal performance. nCaO₂ with the particle sizes in the range of 50-200 nm was prepared, and it performed better for TCE removal when compared to the conventional CaO₂. Further experimental results showed that 70.4% of TCE could be removed in 180 min at the nCaO₂/Fe(II)/TCE molar ratio of 1/2/1, while this data was elevated to 86.1% in the presence of citric acid (CA) at the nCaO₂/Fe(II)/CA/TCE molar ratio of 1/2/2/1 in the same test period. Probe compound tests, specifically designed for free radicals confirmation, demonstrated the presence of HO• and O₂ ^-•. Moreover,

SUBMITTER: Sun Y 

PROVIDER: S-EPMC6957269 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature