Rate enhancing effect of bromide on the removal of ammonia at Ti/PbO_2 anode

摘要

Electrochemical oxidation of ammonium (NH_4~+)at TiO/PbO_2 anode in chloride-free and chloride containing aqueous solutions was studied.The experimental results have shown that oxidation of NH_4~+ is ensured only in the presence of chloride.The oxidation of NH_4~+ is found to follow pseudo first-order kinetics.Bromide i nthe electrolyte is found to cause substantial rate enhancing effect on the ammonium removal.The dependence of k on the current density as well as halide concentration is also discussed in this study.