Study on Leaching Transfer of Butachlor in Black Soil

Leaching transfer of herbicides was considered as the main control factor of the transfer conversion of pesticides in the soil-water environment. Using Black soil column, we studied the leaching transfer of Butachlor in Black soil. The experiment results showed that leaching amount of Butachlor and the depth of the highest value of butachlor content were in the soil positive correlation with the initial moisture content of soil and the waterfall intensity, which were not affected by waterfall pH. Non-ionic surfactant (tween-80) in leaching solution had no significant activation. Cationic surfactants (HDAB) had hindrance effect while anionic surfactant (SDBS) had significant activation in leaching transfer of Butachlor in Black soil. When the concentration of SDBS increased to 1000 mg·L^-1, the depth of the highest concentration of Butachlor in soil columns became deeper. Butachlor was concentrated in the upper layer of soil column in all leaching process, which showed that mobility of Butachlor was weak. Butachlor almost didn´t cause groundwater pollution.