作　　者： ; ; ; ; ; ;

机构地区： 衡阳师范学院化学与材料科学系

出　　处： 《中国给水排水》 2009年第15期 92-95,共4页

摘　　要： 利用废弃的蛋壳制备碳羟基磷灰石（CHAP），研究了其对废水中Mn^2＋的吸附作用，并探讨了CHAP用量、Mn^2＋浓度、温度、pH对吸附效果的影响。试验结果表明：在pH值为6、温度为30℃、搅拌时间为1h、CHAP用量为3g/L、Mn^2＋初始浓度为70mg／L的条件下，CHAP对Mn^2＋的去除率可达到97．9％，吸附容量为22．84mg／g；CHAP对Mn^2＋的吸附过程符合Langmuir和Fre—undlich吸附等温式，吸附反应是自发放热过程；Hn准二级动力学模型能较好地描述CHAP对Mn^2＋的动力学吸附行为。 Mn^2＋ adsorption of simulated wastewater was conducted with carbonate hydroxyapatite （CHAP） which was synthesized by abandoned eggshell. The main factors that might affect the adsorption performance were investigated, such as CHAP dosage, Mn^2＋ concentration, reaction temperature and pH. The results show that the removal rate of Mn^2＋ can reach 97.9% and the adsorption capacity is 22.84 mg/g under the conditions of pH 6, temperature 30℃, stirring time 1 h i CHAP dosage 3 g/L and Mn^2＋ initial concentration 70 mg/L. The adsorption process accords with both Freundlich and Langmuir adsorption isotherm formula. The adsorption reaction is a spontaneous exothermic process. The dynamic data are well represented by the H0 pseudo-second-order kinetic model

关 键 词： 合成碳羟基磷灰石 锰离子 吸附 正交试验

分 类 号： [X703]

领　　域： [环境科学与工程]