羟基磷灰石对水溶液中Cu^(2+)的吸附动力学研究

Adsorption kinetics of copper in aqueous on hydroxyapatite

以氢氧化钙和磷酸为原料,利用中和沉淀反应制备了羟基磷灰石粉末(HAP)。研究了羟基磷灰石(HAP)对水溶液中Cu2+的吸附作用。实验表明,当溶液中Cu2+浓度为100mg/L时,每升水使用5gHAP,搅拌几分钟Cu2+去除率达到99%以上。HAP对Cu2+的吸附速度符合一级反应动力学方程。在22℃、PH=7.5时吸附等温式可用Freundlich公式描述。

The hydroxyapatite powder was prepared by coprecipitation reaction of Ca（OH）2 and H3PO4. Adsorption of hydroxyapatite for copper ion has been studied in the experiment. The result shows that the removal rate of Cu^2＋ is over 99%, after the solution with 100mg/L Cu^2＋ is treated by 5g,/L HAP in a few minutes. The adsorbing rate is consistent with the first-order kinetic equation, and the adsorption isotherm can be described by the Freundlich equation at 22℃, PH = 7.5.