Environmental Quality Evaluation of Soil Heavy Metals in Rizhao Area of Shandong, China(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2018年第04期
- Page:
- 473-486
- Research Field:
- 水资源与环境
- Publishing date:
Info
- Title:
- Environmental Quality Evaluation of Soil Heavy Metals in Rizhao Area of Shandong, China
- Author(s):
- LI Hong-kui; LI Yi-fan
- 1. Key Laboratory of Gold Mineralization Processes and Resources Utilization of Ministry of Land and Resources, Shandong Institute of Geological Sciences, Jinan 250013, Shandong, China; 2. Shandong Key Laboratory of Geological Processes and Resource Utilization in Metallic Minerals, Shandong Institute of Geological Sciences, Jinan 250013, Shandong, China; 3. College of Architecture and Civil Engineering, Weifang University, Weifang 261061, Shandong, China
- Keywords:
- geochemistry; soil; heavy metal element; environment quality; single factor index; comprehensive evaluation index; Shandong
- PACS:
- X142；X825
- DOI:
- -
- Abstract:
- Through systematic ecological geochemical survey and evaluation, 5 323 surface samples were collected in Rizhao area of Shandong, and the geochemical analysis data of heavy metal elements in the surface soil were obtained. The 8 kinds of heavy metal elements (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) in the surface soil were evaluated in accordance with the soil environmental quality standard(GB 15618—1995), and the soil environmental quality was evaluated by using single factor index and comprehensive evaluation index. As showed by the results of soil environmental quality evaluation of single factor, the percentages of Ⅰ class soil in 8 elements, such as As, Cd, Cr, Cu, Hg, Ni, Pb and Zn, are 100.00%, 98.21%, 94.14%, 98.10%, 99.90%, 89.18%, 96.61% and 98.37%, respectively, and the soil environmental quality is good in this area; the average single factor environmental quality of I class soil accounts for 96.81%, Ⅱ class accounts for 3.17%, and Ⅲ class only accounts for 0.02%. As showed by the results of comprehensive evaluation of soil heavy metal element pollution in the surface soil, the area of soil environmental quality which belongs to Ⅰ class with clean-relative clean soil accounts for 86.39%, the area which belongs to Ⅱ class with lightly polluted soil accounts for 13.55%, and the area which belongs to Ⅲ class with moderate polluted soil accounts for only 0.06%, indicating that soil heavy metal pollution in Rizhao area is rare, and the soil environmental quality in overall is in good condition. As showed by the evaluation results of comprehensive index of heavy metal elements in soil, no enrichment area accounts for 5.50% of the total area, weak enrichment area accounts for 38.63%, moderate enrichment accounts for 53.27%, and severe enrichment area accounts for 2.60%, showing that the existing regional pollutants in surface soil has an accumulation trend; although the trend does not reach harmful degree, it should be paid more attention.
Last Update: 2018-07-27