Evaluation of Soil Environmental Quality in Changle, Shandong Province

Abstract

In Changle County collected 315 topsoil samples, analyzed the content of As, Pb, Zn, Cd, Cr, Cu, Hg and Ni eight kinds of heavy metals, using single factor index and Nemerow index to evaluate the soil environmental quality. The evaluation results of single factor soil environmental quality showed that the overall condition of soil environmental quality in Changle County in good condition, elements other than nickel, other seven heavy metals indicators are clean, which reached grade â…  soil environmental quality standards of soil area are accounted for 99.46% . Soil environment of nickel content in high-risk, primarily related to geological background, contaminated areas are concentrated in the Neogene basalts distribution area in Changle County central area, mainly basalt lithology clip conglomerate, claystone and diatomite. Nemerow pollution index evaluation showed that the quality of the soil environment in Changle County mainly to grade â…  of soil environmental quality standards, ratio of 53.83%, followed by grade â…¡, â…¢ level, accounting for 22.62% and 19.04 % of throughout the domain area; â…£ and â…¤ grade followed, accounting for 3.91% and 0.60 % of throughout the domain area. Among them, the nickel content is high, belong to the most polluted factor, for Nemerow index evaluation results affect more prominent, while the remaining seven indicators of heavy metals are clean.