Source apportionment of heavy metals in farmland soil from new submerged area in Danjiangkou Reservoir
HAN Pei-pei1, Xie Jian2, WANG Jian1, QIANG Xiao-yan1, AI Lei1, SHI Zhi-hua1
1. College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China;
2. Shiyan Science and Technology School, Shiyan 442000, China
The Danjiangkou reservoir is the water source for the Middle Route Project under the South-to-North WaterTransfer Scheme. Heavy metal pollution assessment in the new submerged area is critical for water conservation. Therefore, it is essential to assess heavy metal pollution in the new submerged area. In this study, we determined the contents of heavy metals (Cd, Cr, Cu, Ni, Pb, Zn, As, Mn), in which 169soil samples of the new submerged area were collected, and we analyzed the source and enrichment of heavy metals using enrichment factor and multivariate statistical analysis. The concentration of Cr(45.11mg/kg) was lower than the background value of the reservoir area, while the concentration of Cd(1.04mg/kg) was higher than the background value within the sampling area. The spatial analysis showed that the concentrations of Cd, Cr, Ni, Pb, Zn and As (except for Cu) in the Dan River Reservoir were higher than the Han River Reservoir, the coefficient of variation were 0.58, 0.72, 0.58, 0.74, 0.35 and 1.12, respectively. Cd and As were the dominant contaminated element of the new submerged area in the Danjiangkou reservoir. The enrichment factor value of Cd was 10.3, and the area moderately contaminated or above of Cd and As occupied 86.6 percent and 2.6 percent, respectively. The results revealed that As, Ni, Cu, Pb and Cr were the main input of natural sources, whereas the agricultural production activities, industrial production activities and domestic waste were the sources of the accumulation of As and Cd.
韩培培, 谢俭, 王剑, 强小燕, 艾蕾, 史志华. 丹江口水库新增淹没区农田土壤重金属源解析[J]. 中国环境科学, 2016, 36(8): 2437-2443.
HAN Pei-pei, Xie Jian, WANG Jian, QIANG Xiao-yan, AI Lei, SHI Zhi-hua. Source apportionment of heavy metals in farmland soil from new submerged area in Danjiangkou Reservoir. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(8): 2437-2443.
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