Heavy Metal Pollution and Ecological Risk Assessment of Farmland Soil, Jilin Province

摘要

122 soil samples were collected in farmland of Jilin Province, analyzed the pollution situation of 6 kinds of heavy metals by the pollution index method, the geo-accumulation index method and potential ecological risk. The results showed that: according to Nemero pollution index, there are 1.64%, 8.20% and 34.43% of soil samples in high level, moderate level and low level of pollution, respectively, but all is in low ecological risk. There is basically no pollution of Zn, Cu, Hg and As in farmland. The samples have 13.93% exceeding the second level Cd concentration of the national soil quality standard with average 1.65 times, mainly concentrated in Tonghua and Ji'an, southern Jinlin. The proportion of Cd ecological risk in moderate and considerable level is 3.28% and 9.84%, respectively.