中文摘要：

以高压汞灯为光源，研究了不同辣椒色素及不同色素浓度对百菌清于水溶液中的光解。结果表明，百菌清在水中的光解速率为辣椒黄色素〉辣椒红色素；随色素浓度的增加，在100mg·L-1的辣椒色素水溶液中，辣椒黄素有显著的光敏化作用，而在50mg·L-1的辣椒红色素溶液中，辣椒红色素有显著的光猝灭作用。

英文摘要：

In this paper, we studied the photolysis of chlorothalonil in different concentrations of red and yellow capsicum pigment aqueous solution, when exposure to light from high pressure mercury lamp. The results showed that the photolytic rate of chlorothalonil in yellow capsicum pigment was higher than that in red capsicum pigment. With the increase of the pigment concentration, remarkable photosensitization was determined in the aqueous solution of 100 mg.L-1 yellow capsicum pigment, while red capsicum pigment of the concentration of 50 mg.L-1 played an important role in optical quenching.