【摘要】 本文通过多因素和单因素的模拟实验研究,论证了已被甲基汞污染的河流沉积物,能以一定速度向上复水层释放甲基汞,其释放速度受水环境的溶解氧和温度所制约.在低溶解氧的水环境中,释放速度随着温度的升高而加快.在最佳条件下,各种类型沉积物的释放速度与沉积物中原有甲基汞的含量呈线性关系.沉积物中甲基汞的释放速度与汞的甲基化速度应是两个不同的概念,在讨论汞污染沉积物的治理途径中尤其不可忽视.更多还原

【Abstract】 According to simulation test of single and multi-factors, this paper postulates that sediments contaminated with methyl-mercury can also release it into water phase at a certain rate, which is controlled by dissolved oxygen (DO) and temperature of water environment. In the water environment with low DO, releasing rate decreases with raising temperature. The rate for various types of sediments appears in linear correlation with original content of methylmercury in the sediments under the best conditions.It becomes obvious that the releasing rate of methyl-mercury and the rate of methylation of mercury in the sediments are entirely two different conceptions. Attention has to be drawn to this problem when considering mercury treatment.更多还原