ZUO Rui1,2,WANG Lina1,2, CAO Yan1,2, LIU Li1,2, LI Xianbo1,2, WANG Jinsheng1,2, TENG Yanguo1,2
(1.College of Water Sciences, Beijing Normal University, Beijing 100875, China;
2．Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing 100875, China)
Abstract: As the study objectives, Jinji riverside water sources field in Wuzhong City was selected to study the pollution characteristics and spatial variation of heavy metals in soil. Based on characteristics of soil, 15 soil samples were collected and analyzed for heavy metals including arsenic, cadmium, chromium, copper, lead, nickel, and manganese. Spatial distribution and sources apportionment of soil pollution of each heavy metal were analyzed by positive matrix factorization method. Results show that the contents of heavy metals of all samples have not exceeded regional soil background value and the national secondary standard of soil environment in the area. Heavy metals in the soil under the natural source of the total contribution rate is 34.1%, from which, 26.2% is contribution of industrial pollution, 21.1% is contribution of regional agricultural pollution, and 18.6% is contribution of livestock and poultry feces piled and fertilization effects. Pollution sources apportionment and pollution contribution degree analysis results could provide important scientific basis for water supply security and environmental protection of water source field.
Key words: soil; heavy metal; pollution; positive matrix factorization method; pollution contribution
EARTH AND ENVIRONMENT Vol.45, No.4, Tot No.318, 2017, Page 464-471
