Indentifying Sources of Heavy Metal Pollutions in Soil Based on Multivariate Geostatistical Method

摘要

The development of urbanization, industrialization and agricultural intensification has exerted increasing influences on the quality of soil environment. With Kunshan as the researched area, and by combining multivariate statistics and geostatistics, this paper studies the sources of 8 heavy metals in the soil of Kunshan. The result showed that the sewage irrigation in chemical industry is the major source of Hg, Cd and Pb pollutions, printing and dyeing industry is that of Cr and Ni pollutions, and electronic industry is that of Zn and Cu pollutions in the soil of Kunshan respectively; metallurgy and electroplating industries have influences on the Hg, Cd, Pb, Cr, Ni, Zn and Cu pollutions in the soil of Kunshan; and the source of As is unknown, but is greatly related to the distribution of lake and water system.