Study on Soil Heavy Metal Content and Ecological Risk Assessment of Jiaozhou Bay of China

Sampling and analyzing the soil of coastal public green space in Jiaozhou Bay, Qingdao, a total of 31 plots were surveyed, 242 soil samples were collected, and the types and contents of heavy metals in the soil were analyzed. The ecological risk index method and the ground accumulation index method were used to evaluate Qingdao Jiaozhou Bay. Heavy metal risk in coastal public green space. The results show that the average content of Cr, Cd, Pb, Zn, Hg, Cu and Ni in heavy metals exceeds the natural background value of soil. The content of As, Cr, Pb, Zn and Cu is lower than the value specified in the secondary standard specified in GB15618-1995 Soil Environmental Quality Standard. The content of Hg and Ni is between the values specified in the second to third grades. The content of Cd exceeds the value specified by the three-level standard. The ecological risk index and the low cumulative index evaluation show that the heavy metals with relatively high risk are Cd and Hg.