长江口水中汞含量分析评价

为了了解长江口水中汞污染情况,2013年1 ～ 12月份逐月采集水样以原子荧光法测量其中汞的含量,采用单因子污染指数法评估汞的污染水平.结果表明,长江口水体中汞含量为0.05～0.16 μg/L,平均值达0.09 μg/L,且不同月份浓度变化较大,呈现春夏高、秋冬低的季节变化特征;以地表水Ⅲ类标准（0.1μg/L）为评价标准,单因子污染评价结果显示长江口汞污染全部高于清洁水平,且有5个月处于污染程度,表明长江口水体中汞含量存在潜在健康风险.

Evaluation of Mercury Concentration in Yangtze River Estuary

In order to detect the mercury pollution of surface water in Yangtze River Estuary, the mercury concentrations of samples, collected from January to December in 2013, were determined by atomic fluorescence spectrophotometry （AFS）, and the mercury contamination was evaluated by single factor evaluation. The results showed that the mercury contends were varied from 0.05 to 0.16 μg/L, and the average was 0. 09 μg/L, the mercury concentration distribution displayed the characters as following： it had different value between months, and showed high concentration in spring and summer, low concentration in autumn and winter. Single factor evaluation indicated mercury pollution in water of Yangtze River Estuary was higher than clean level, and even 5 months＇ researched pollution states according to surface water m kind standard （0. 01 μg/L）, this phenomenon showed there exist potential health risk mercury pollution in water of Yangtze River Estuary .