Simultaneous removal of trihalomethanes by bimetallic Ag/Zn: kinetics study

Abstract

In the present work, bimetallic silver/zinc was applied into the degradation of trihalomethanes, THMs: CHCl₃, CHBrCl₂, CHBr₂Cl, and CHBr₃. The kinetics reaction rates and removal efficiencies of the THM compound mixtures, in the aqueous solutions, were investigated. Batch experiments were conducted under mild conditions, ambient temperature, and pressure. The primary degradation reaction followed a pseudo-first-order kinetic law. The first-order rate constants and the degradation efficiencies followed the decreasing order of CHBr₃>CHBr₂Cl>CHBrCl₂>CHCl₃. The bond dissociation energy and hydrophilic/hydrophobic characteristics of the THM compounds may become the most important parameters affecting the degradation kinetics and efficiency by bimetallic Ag/Zn.