Caixia Xue, Qingquan Du

(Beijing Forestry University)

Abstract：

With the increase of people's production and daily use of pesticides and other chemicals, more and more lakes are polluted, among which lakes contaminated with pesticides account for a large proportion of polluted lakes. Therefore, a comprehensive understanding of the status and mechanism of pesticide pollution in lakes is very important for the ecological restoration of lakes in the future. The author briefly introduced the common types of pesticide residues in daily life, summarized the residual amounts of pesticides in sediment, water, and organisms, and summarized the distribution characteristics of pesticides in sediment water organisms. The sources and ecological risks of pesticides in water sediment organisms were briefly explained. Pesticide pollution in water bodies, sediments, and aquatic organisms is mainly caused by organic chlorine and organic phosphorus. Organic chlorine pollution mainly comes from historical and recent use, and pesticide pollution has significantly inhibited superoxide dismutase (SOD) in carp liver, kidney, and muscle; Among the distribution characteristics of pesticides in water, sediment, and aquatic organisms, the pesticide residues in aquatic organisms are the highest; Some lakes already have low ecological risks. There are low ecological risks in some lakes in China, and pesticide residues have been detected in water bodies, sediments, and organisms, with pesticide residue accumulation already occurring.

Key Words：

pesticides; pollution characteristics; pesticide residues; water environment