Studies on the Degradation and Mobility of Dinotefuran in Soil
Extensive use of dinotefuran can cause some problems such as soil and groundwater pollution, and deterioration of ecological environment. Researching the degradation characteristics and mobility of dinotefuran in soil has important significance for environment safety evaluation of dinotefuran. The degradation and mobility of dinotefuran in three kinds of soils were investigated, and the influence factors of dinotefuran degradation in soil were studied by using indoor simulating test. The results showed that the degradation rates of dinotefuran in three kinds of soils following sequence: Nanjing yellow-brown soil > Northeast China black soil > Jiangxi red soil,and the half life were 35.2, 92.4 and 154.0 days, respectively. Dinotefuran possess a medium degradation in Nanjing yellow-brown soil,and difficult degradation in Jiangxi red soil and Northeast China black soil. The decay of dinotefuran was accelerated with the moisture of soil elevating, dinotefuran decay was decreased with 80% moisture treatments because microbial organisms growth was inhibited. When the microbial organisms and organic matter are present in soil, the degradations of dinotefuran were accelerated 2.1 and 6.2 times, respectively. The soil thin-layer chromatography (TLC) showed that theRf of dinotefuran were 0.77, 0.87 and 0.55 in Nanjing yellow-brown soil, Jiangxi red soil and Northeast China black soil, respectively. These results indicated that dinotefuran was removable in Nanjing yellow-brown soil and Jiangxi red soil, medium-mobile in Northeast China black soil. The results of soil column leaching showed that 37.4% and 65.0% dinotefuran were leached out in Nanjing yellow-brown soil and Jiangxi red soil, respectively. Dinotefuran moved mainly in a distance of 10.0~30.0 cm in Northeast China black soil. This work demonstrates that dinotefuran has potential risk for contaminating groundwater and attention should be paid to its application.
国家科技期刊平台
NSTL
万方数据
维普
