Abstract:
【Objectives】 To find out the soil heavy metal pollution and ecological status of different land types in the delta area of Dongying City, Shandong Province, and timely understand and protect the safety of soil quality. 【Methods】 The ecological risks of enrichment and pollution levels in 8 heavy metal elements (As, Hg, Cr, Pb, Ni, Cu, Zn, and Cd) in the study area were evaluated using the Nemerow comprehensive index and potential ecological risk index. 【Results】 The average contents of 8 heavy metal elements in the surface soil of the study area were ranked as Zn>Cr>Ni>Cu>Pb>As>Cd>Hg, with average contents of 67.68, 63.73, 30.05, 21.11, 20.50, 10.53, 0.14, and 0.02 mg/kg, respectively. Among them, the measured average values of As, Ni, Zn, and Cd were higher than the background values of soil elements in Shandong Province, while the measured average values of Cr, Pb, and Cu were lower than the background values of soil elements in Shandong Province. The measured average value of Hg was close to the background value of soil elements in Shandong Province. 【Conclusions】 The comprehensive pollution risks of different land types in the study area were relatively low, and the soil samples collected were all of the safety levels.