ZHU Heng-liang，LIU Hong-yan*，LONG Jia-huan，YAN Zi-yun
（College of Resources and Environmental Engineering，Guizhou University，Guiyang550025, China）

Abstract: Eleven typical contaminated areas with different pollutant sources in the cities of Guiyang, Liupanshui, Duyun and Bijiees in Guizhou Province were selected to study the diversity of pollution characteristics of heavy metals in soils, and supply scientific data to the protection against heavy metal pollution. Cr, Cu, Zn, As, Cd and Pb in 189 soil samples were measured by inductively coupled plasma mass spectrometry (ICP-MS), using cluster analysis and principal component analysis to analyze the results. The results indicated that the comprehensive pollution index of heavy metals in soil was 0.897 in Jinzhongzhen, belonging to the warning degree pollution, and Cd concentration was 0.34 mg/kg in soil, which was affected by phosphorus limestone with a high background value of cadmium. Soils in Erguan Village of Qingyan, Caoguan Village of Baiyun, Jiuan of Huaxi, Houwu of Qingzhen were attacked by heavy-degree heavy metal pollution. Sewage irrigation had an impact on the soil in Wudang of Guiyang, belonging to middle-degree pollution, and the feature element was cadmium. Affected by Pb-Zn smelting and coal mining, soils in Luomo Village of Yemachuan, Anle Village, Xingfu Village and Bagu of Duyun suffered heavy–degree pollution, Due to the presence of independent cadmium deposits in Bagu of Duyun, the single pollution index of Cd was 77.88, and the comprehensive pollution index was 56.22. The results of principal component analysis showed that Cd and Cu were the typical elements with high background values in soils, Zn and Pb were severe contamination elements in Pb-Zn smelting areas, and Cr and As were relatively the overlapped elements from extraneous sources. The surface soil was dominated by acidic soil in all areas, heavy metal contents had no significant correlation with soil pH value, it was basically affected by pollution intensity, cadmium content of soil was almost highest in the center near the pollution sources, and it decreased progressively along the distance from the center.

Key words: Guizhou Province; soil; heavy metal; pollution source; pH; principal component analysis

EARTH AND ENVIRONMENT Vol. 42, No.4, Tot No.300, 2014, Page 505-512