碳羟基磷灰石对废水中Cd^(2+)的吸附  

Adsorption of Cd^(2+) in wastewater by carbonate hydroxylapatite

作　　者：唐文清[1] 曾光明[1] 蓝俊康[2] 李小明[1] 陈朝猛[1] 高帅[3] 

机构地区：[1]湖南大学环境科学与工程学院,长沙410082 [2]桂林工学院资源与环境工程系,广西桂林541004 [3]衡阳师范学院资源环境与旅游管理系,湖南衡阳421008

出　　处：《桂林工学院学报》2006年第3期388-391,共4页Journal of Guilin University of Technology

基　　金：国家自然科学基金资助项目(70171055);国家"863"计划资助项目(2004AA649370);湖南省教育厅一般项目(06C184)

摘　　要：利用废弃蛋壳制备碳羟基磷灰石,并利用其吸附废水中的Cd2+.考察了Cd2+初始浓度、pH值、吸附时间、吸附剂用量以及温度等因素对吸附效果的影响,结果表明:当废水中Cd2+初始浓度为30 mg/L、pH=7、吸附时间35 m in、温度35℃时,碳羟基磷灰石对Cd2+去除率高达99.9%.吸附实验还表明该吸附符合Freundlich方程.Carbonate hydroxylapatite is first made from abandoned eggshell and used to remove Cd^2＋ from simulated wastewater. The adsorption experiments show that the adsorption effect is controlled by the initial concentration of Cd^2＋ , pH values in wastewater, adsorption period, the consumption of carbonate hydroxylapatite and the reaction temperature. The results also show that the rate of the removal of Cd^2＋ by carbonate hydroxylapatite is increased to 99.9% when the initial concentration of Cd^2＋ in wastewater is 30 mg/L, pH values is 7, adsorption period is 35 min, and the reaction temperature is 35℃. The test proves the adsorption equation is in accordance with Freundlich.

关 键 词：碳羟基磷灰石(CHAP) 吸附 CD^2+ 特性 

分 类 号：X703.1[环境科学与工程—环境工程] TU991.2[建筑科学—市政工程]