Effects of key reaction parameters on the reductive dechlorination of chloroform with Pd/Fe⁰ bimetal in aqueous solution

Abstract

In this study, bimetallic Pd/Fe⁰ particles were synthesized and employed to reduce chloroform in aqueous solution. The investigation emphasized on the effects of some key reaction parameters including Pd/Fe⁰ dosage, pH, oxidation-reduction potential (ORP) and presence of anions on the reductive dechlorination reaction. The experimental results showed that high Pd/Fe⁰ dosage, low initial pH and low ORP benefited the reductive dechlorination of chloroform. The ORP values in the aqueous chloroform solution bubbled with different gases of N₂, O₂ and air varied significantly and the efficiency of chloroform degradation under different atmospheres followed an order from high to low as N₂ > air > O₂.(See Article file for details of the abstract.)