Dynamic and Pollution Characteristics of Soil Mercury of Dahuofang Reservoir Research
Abstract: To explore the pollution situation and the environmental risk of mercury in Dahuofang reservoir, we choose 10 sampling points, collected 30 soil samples, 20 water samples and 30 air samples to analyze the contents and distribution of mercury in soil, water and air in different areas. We discuss the pollution status and environmental risks of mercury in soil, analyze the biological availability and potential risks and explore the relationship between the atmospheric mercury and the soil mercury enrichment by the geoaccumulation index method and potential ecological risk index method. The results indicated that the average content of mercury in the soil of Dahuofang reser-voir were 27.76 μg/kg, the variation coefficient was 69.32, The maximum was 82.47 μg/kg, the minimum was 12.49 μg/kg; The average content of mercury in the collected water of Dahuofang reservoir were 19.87 μg/kg, The variation coefficient was 71.35, the maximum was 53.82 μg/kg, the minimum was 2.92 μg/kg. The released mercury flux into the atmosphere was 17.80 - 62.47 μg/m2/h, the average was 37.76 μg/m2/h. The correlation coefficient between mercury content in soil and the mercury concentration in atmospheric was 0.81** (P < 0.01), they were significantly correlated. The soil mercury enrichment contributed greatly to atmospheric mercury pollution. According to the spatial distribution of mercury, it indicated that the river was slightly polluted. The mercury content in sediment of Hun River and Suzi River was higher, and the content of mer-cury in water was lower. The evaluation of soil mercury pollution by geoaccumulation index method and the soil mercury ecological risk assessment by potential ecological risk index method. The results showed that the pollution level and the ecological risk of Dahuofang reservoir were low, atmospheric mercury pollution contributed great to soil mercury enrichment.
文章引用: 张 庆 , 田思思 , 周贵宇 , 梁 雷 (2015) 大伙房水库土壤汞动态与污染特征研究。 环境保护前沿， 5， 145-154. doi: 10.12677/AEP.2015.55019
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