Studies on Sonochemical Degradation of Chlorobenzene in Waste Water

Sonochemical degradation of chlorobenzene in aqueous solutions was studied. The pH of the aqueous solutions of chlorobenzene, the concentration of Cl- ion and chlorobenzene remained were measured. It is found that the chlorobenzene concentrations in aqueous solutions with 1.5721,0.9826, and 0.04912 molm-3 initial concentrations were reduced by 57.6, 40.3, and 30.9% after 120 minutes of sonication respectively. The results showed that the pH of the aqueous solutions dropped gradually, the concentration of Cl- ion was in the same order of magnitude as H+ ion and increased with the reaction time, the chemical kinetics of the reaction for sonochemical degradation of chlorobenzene fitted to the first-order rate law approximately. The mechanism of the sonochemical degradation of chlorobenzene was proposed.