Haiyan Wang, Sunxinyi Wang, Zixuan Jia, Hao Li, Jiayu Wang, Teng Zhang, Jiayue Dong, Peizeng Yang, Jing Chen, Yuefei Ji, Junhe Lu
Isoproturon (IPU), a widely utilized phenylurea herbicide, is recognized as an emerging contaminant. Previous studies have predominantly attributed the degradation of IPU in natural waters to indirect photolysis by natural organic matter (NOM). Here, we demonstrate that nitrite (NO2 - ) also serves as an important photosensitizer that induces the photo-degradation of IPU. Through radical quenching tests, we identify hydroxyl radicals (•OH) and nitrogen dioxide radicals (NO2 • ) originating from NO2 - photolysis as key players in IPU degradation, resulting in the generation of a series of hydroxylated and nitrated byproducts...
May 13, 2024: Environmental Pollution