本文用模拟实脸方法研究了松花江吉林一扶余江段沉积汞的释放速率。汞的释放速率主要受沉积物中汞含里,汞的形态,水中溶解氧状态和温度的影响。在正常溶解权状态下,汞释放速率与不稳定态沉积汞浓度成线性关系,与温度成指数关系。建立了汞释放速率的经验公式。推算了该江段沉积汞的年释放贷。

Releasing rate of mercury from the sediments in Jilin-Fuyu reach of the Songhua River is studied through simulating experiments.Releasing rate of mercury is mainly affected by the content and species of murcury in sediments,as well as the content of dissolved oxygen in waters and temperature.Under normal oxygen condition,releasing rate of mercury is linear with the concentration of unstable mercury,and exponential with temperature.The empiric formula about releasing rate of mercury is established.Annual releasing amount of mercury from sediments is estimated.