黄河泥沙对某些重金属离子的特性吸附及影响因素研究

黄河水在河南境内含沙量巨大，所携带的泥沙粒子对重金属离子的作用关系到河水的自净作用。以泥沙粒子的ξ电位测定为主要手段，研究了泥沙粒子对Ｃｒ、Ｃｕ、Ｍｎ、Ｃｄ离子的特性吸附及某些因素对吸附的影响。结果表明:不同重金属离子被吸附程度不同；泥沙表面的有机物层阻碍吸附；而溶液的盐度增大，温度升高均不利于吸附，且各离子受影响的程度不同。 

Characteristic Adsorption and Impact Factors of Yellow River Sand to Some Heavy Metal Ions

The water of Yellow River Carries enormous amount of sand.The interaction between the carried sand with heavy metals determines the selfpurification capacity of the river.The characteristic adsorption of sand particles to Cr,Cu,Mn and Cd ions as well as some relevant factors affecting adsorption were studied by means of zeta potential method as the maintechnique. Results show that the adsorption of heavy metals was different,the organic com-pound on the surface of sand,the salt concentration and temperature increase were unfavorablefor the adsorption,and the degree of impacts on each ion was different.