Abstract:

Taking the paddy soil from Fengyang Town in Taishun County as the research object, soil samples were collected from six planting area sites. The contents of Cu, Pb, Cd, Zn, Cr and Ni in the soil were determined using inductively coupled plasma mass spectrometry (ICP-MS). The pollution degree of the paddy soil in the study area was analyzed using the single factor pollution index, Nemerow comprehensive pollution index, and geoaccumulation index methods. The results showed that the average contents of Cu, Pb, Cd, Zn, Cr and Ni in the paddy soil were 11.35, 26.75, 0.29, 57.92, 23.92 and 14.35 mg·kg^-1, respectively. The single factor pollution index, Nemerow comprehensive pollution index, and geoaccumulation index methods indicated that all six sampling sites were in a non-polluted state. Compared with the risk screening values for agricultural soil, the average heavy metal content in the surveyed paddy soils was lower than the corresponding risk screening values for agricultural soil.

Key words: paddy soil, heavy metal pollution, environmental quality of soil, Nemerow comprehensive pollution index, geoaccumulation index