武汉市葛店地区汞污染及其分布特征
THE CONCENTRATION AND DISTRIBUTION CHARACTERISTICS OF MERCURY IN GEDIAN AREA, WUHAN
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摘要: 对武汉市葛店地区的土壤、水体及沉积物进行了系统取样、测试.结果表明:该地区表层和底层土壤中汞的平均含量分别为0.314mg·kg-1和0.181mg·kg-1,分别是区域土壤汞背景值的6倍和3.6倍,初步分析原因为污灌、大气汞的干、湿沉降和使用含汞农药;水体汞含量平均值为1606.77ng·1-1,远远超过了国家地表水环境质量标准(GHZB1-1999)中的Ⅲ类水质标准(≤100ng·1-1,且水体汞含量随距化工厂距离的增加而递减,形态分析表明,水体汞大部分以粒子态和溶解态存在,活性汞只占很小一部分;沉积物样品中汞的含量范围为2.450-8.630mg·kg-1,平均值4.677mg·kg-1,污染程度随距化工厂距离的增加而递减.Abstract: For investigating the mercury pollution of Gedian area of Wuhan city, the samples of soil, waters and sedi ment in this area had been taken analyzed. The result showed:this average concentrations of surface and bottom soil mercury were 0. 314mg·kg-1and 0. 181mg·kg-1 respectively, and surface mercury concentration was higher than bottom. Initial reasons were irrigating, mercury pesticide and atmospheric mercury deposition. The average concentration of water body mercury (1606.77ng·1-1) had far exceeded water quality Ⅲ standard (100ng·l-1) of surface water (GHZB 1-1999) , and species analysis indicated most of mercury was particulate and dissolved, active mercury small. The range of mercury concentration of sediment samples is 2. 450-8. 630mg·kg-1, average 4. 677mg·kg-1, and pollution is very serious.
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Key words:
- Wuhan /
- mercury pollution /
- distribution
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