Residual Levels of Organochlorine Pesticides and Heavy Metals in the Guanzhong Region of the Weihe Basin, North-western China

Abstract

The residual concentrations of 20 types of organochlorine pesticides (OCPs) is 0.33 to 130.34 ng·g–1 (dry mass) in typical soils from 67 orchards spread over six counties in the Guanzhong region of the Weihe Basin, north-western China. Meanwhile, the concentration range of valid state Cu, Zn, and Cd in soil is 0.13 to 1.81 mg·kg–1, ND to 3.96 mg·kg–1, and ND to 0.047 mg·kg–1, respectively. The average residual concentrations of OCPs present a class of multiple order distribution with both latitude and longitude. The residual concentrations of valid state Cu and Zn have some correlation with the residual concentrations of OCPs.