室温固相法制备氢氧化镁及其对水溶液中Ni(Ⅱ)的吸附  

Preparation of Magnesium Hydroxide by Room Temperature Solid Phase Method and Adsorption of Ni(Ⅱ) from Aqueous Solution

作　　者：郭效军[1] 李静[1] 路娟[1] 张力[1] 赵磊华[1] 

机构地区：[1]西北师范大学化学化工学院,兰州730070

出　　处：《硅酸盐通报》2012年第2期406-410,共5页Bulletin of the Chinese Ceramic Society

基　　金：甘肃省教育厅研究生导师科研项目(No.1001-08)

摘　　要：以氯化镁、氢氧化钠、氯化钠为原料,利用室温固相反应制备了氢氧化镁。采用X射线粉末衍射(XRD)、扫描电镜(SEM)等方法对样品的物相、形貌进行了表征。对氢氧化镁吸附处理含Ni(Ⅱ)废水进行了研究,考察了pH值、吸附时间和吸附温度等因素对氢氧化镁吸附Ni(Ⅱ)过程的影响,使用准一级动力学模型、准二级动力学模型对动力学数据进行了拟合,结果表明氢氧化镁对Ni(Ⅱ)的吸附过程符合准二级动力学模型,并且吸附量随温度的增加而增大。Magnesium hydroxide samples were prepared using magnesium chloride, sodium chloride and sodium hydroxide by solid phase method. The phase and morphology of the samples were characterized by XRD and SEM. The adsorption of magnesium hydroxide with Ni（Ⅱ） in wastewater was investigated. The effects of factors including pH value of solution, contact time and adsorption temperature on the adsorption process of Ni （Ⅱ） were discussed. The pseudo-first order kinetic model and pesudo-second order kinetic model were applied to analyze the kinetic data. The results showed that the experimental data conformed to the pseudo-second order kinetic model and the adsorption capacities increased with increase in temperature.

关 键 词：室温固相法 氢氧化镁 Ni(Ⅱ) 吸附 

分 类 号：TB34[一般工业技术—材料科学与工程]