Effect of Nitrite and Nitrate as the Source of OH Radical in the O3/UV Process with or without Benzene

Abstract

This study suggests the prediction model for the concentration variation of and along with the rate constants of all reactions during ozonation under UV radiation (/UV process). While was completely converted into during the -only process, the production of radical or was expected in the /UV process. In addition, the quenching of OH radicals, by radical in the /UV process, resulted in regeneration of . However, the regeneration of was not observed in the /UV process in the presence of where the concentrations of and were significantly reduced compared to in the process without . The pseudo-first order rate constants of all species were calculated with and without the presence of to predict the variation of concentrations of all species during the /UV process. It was suggested that and in the /UV process can be more effectively removed from an aqueous system with an OH radical scavenger such as .