Degradation of Artificial Sweetener Saccharin Sodium by Advanced Oxidation Technology

摘要

In this paper, the advanced oxidation processes of photocatalytic oxidation and Photo-Fenton oxidation were used in degradation of emerging pollutants saccharin sodium. The concentration of saccharin sodium was determined by HPLC. The results showed both photocatalytic oxidation and Photo-Fenton oxidation had an effective degradation of saccharin sodium. The degradation process was followed the first-order reaction. The best conditions of photocatalytic oxidation system: 500W mercury lamp, 0.04 g TiO_2, pH=7 and the best ratio of photo-Fenton was SAC:H_2O_2:Fe~(2+)=5:60:1. The total organic carbon (TOC) of sample has significantly reduced to about 93% by the two systems.