Waste clay ceramsite supported Ti catalyst based on ozone/UV combination in treatment of black-odor waters

Abstract

Black-odor water not only completely loses the function, but also seriously affects the environment landscape and human health. Aiming at the problems of high cost and low activity of catalysts for black-odor waters treatment by catalytic ozonation technology, this paper fabricated a stable Ti-based supported catalyst using the modified waste clay ceramsite (Ti/MC1). Combined with the ozone/UV technology, this catalyst realized effective degradation of pollutants in actual black-odor waters. Based on the catalytic kinetics analysis, it showed that the prepared catalyst performance generally higher activity than those with other carriers or active components. As a kind of wastes reuse, waste ceramsite is environment-friendly with high economic efficiency, which gives it higher practical value and popularization prospect. Under the optimal conditions, the removal rates of NH3-N and COD in water have reached 72.08% and 80.07% respectively. In addition, by monitoring the physiological indexes of representative submerged macrophytes during the operation process, it could be concluded that the constructed technology will not hinder the normal growth of aquatic organisms in real water environment, which confirms the feasibility of its application. The results provided a new idea for the application of nature-based processes in aqueous environment management and remediation, while also provided a theoretical basis for efficient treatment of black-odor waters.