Abstract:

The investigation of heavy metal elements levels in the soil media is premise of harmonious development of agriculture, industry and soil environment in Ili Region, Xinjiang, China. The environmental geochemical baseline was used to measure the concentration of As and Hg in the soil samples, the index of geo-accumulation (Igeo) of As, Hg was applied to analyze the state of the environment the surficial soil in Ili Region, Xinjiang, China. The baseline values were As 35.2 mg/kg, Hg 9.32 μg/kg, determined by standard method and statistic method, respectively. According to the results of geo-accumulation (Igeo) of As, Hg, the surficial soil in Ili Region were not polluted by As and Hg. The surficial soils polluted by As accounted for 1%, 77.9% of the surficial soils were clean and 21.1% of the surficial soils were less clean. And 95.2% of the surficial soils were not polluted by Hg, 4.8% of the surficial soils were less clean. Among 4 soil samples, the extent of clean by As were saline-alkali soil>chernozem>chestnut soil>sierozem, while in the 4 soil samples, the extent of clean by Hg were sierozem=saline-alkali soil>chernozem>chestnut soil. The results of the As, Hg of concentration indicated that comparing to As, Hg in the surficial soils seemed to be more clean. In addition, the As, Hg of concentration in the soil of Ili region were affected by natural factors such as altitude and soil type.