Degradation of rizazole in water-sediment systems

作者：Zhang, Changpeng; Zhao, Hua; Ping, Lifeng; Cai, Xiaoming; Wu, Min; He, Hongmei; Zhang, Chunrong; Zhu, Yahong; Li, Zhen^*

来源：Journal of Environmental Science and Health - Part B: Pesticides, Food Contaminants, and Agricultural Wastes , 2013, 48(5): 319-323.

DOI：10.1080/03601234.2013.742357

• Aerobic conditions
• anaerobic conditions
• half-life
• West Lake system
• Beijing-Hangzhou Grand Canal system
• N-substituted phenyl pyrazole insecticide

This study investigated the degradation of rizazole in water-sediment systems (West Lake system, WL; BeijingHangzhou Grand Canal system, BG) with two different types of sediments under aerobic and anaerobic conditions. The half-lives of rizazole in the WL water phase (14.5915.13 d) were similar to those in the BG water phase (15.9016.46 d). Within 37 d, the rizazole concentration in the sediments reached the maximum values, i.e., equilibrium. Rizazole dissipation was faster in the WL sediment phase with higher organic matter content (T1/2 = 18.9919.09 d) compared with the BG sediment phase (T1/2 = 31.0833.32 d). Rizazole degradation was slightly faster in the West Lake water-sediment system (WL system) (T1/2 = 17.1118.05 d) than in the BeijingHangzhou Grand Canal watersediment system (BG system) (T1/2 = 20.5125.02 d). The aerobic degradation of rizazole was similar to its anaerobic degradation in the water-sediment system. The findings are useful to understand the behavior of pesticide in environment.

• 出版日期2013-5-1
• 单位浙江省农业科学院