黄河泥沙吸附汞污染物静态试验

Mercury Pollutant Adsorption by Sediment of the Yellow River in Static Experiments

基于黄河天然混合沙的静水沉降吸附试验,研究了黄河泥沙对汞的吸附规律。结果表明:①质量浓度为5～25kg/m3的泥沙对汞的吸附在0.5 h内基本达到稳定,质量浓度为1 kg/m3的泥沙在0.5 h之后对汞污染物仍有一定的吸附能力,但吸附速率不大;②泥沙级配对汞的吸附有一定的影响,粗沙的吸附能力略低于细沙和中沙;③在中低含沙量时,含沙量增加会引起吸附表面积增加,吸附量和含沙量呈线性相关关系。

Based on the adsorption test in the static condition by prototype sands of the Yellow River,the adsorption characteristics of sediment to mercury were researched.The results show that a） when sediment concentration is 5-25 kg/m3,adsorption equilibrium of mercury can be achieved in 0.5 hours,After 0.5 hours,there is still absorption capacity to mercury when sediment concentration is 1 kg/m3,but the adsorption rate is low;b） the sediment gradation effects the adsorption behavior,that adsorption of coarse sediment is a little smaller than that of fine sediment and medium granular sediment;c） with sediment concentration getting higher,adsorption surface area increases in the low sediment concentration,and sediment adsorption of mercury shows a linear increase.