Present Situation of Heavy Metal Content in Cultivated Soil and Countermeasures for Pollution Control in Nan'an

Soil samples from 95 monitoring sites of agricultural products in Nan'an City were sampled and determined, and the contents of heavy metals in soil were analyzed. The results showed that the contents of As, Hg, Ni, Cu, Zn were all in the safe range, and the effective contents of Cd, Cr and Pb exceeded the safety values. Among them, 66 monitoring points were in the safety level, 24 points were in alert level, 3 points were in the restricted level and 2 points were in the high-risk level, and accounting 69.5%, 25.3%, 3.1% and 2.1% respectively. According to the results of detection and analysis, corresponding measures for prevention and control of heavy metal pollution were put forward.