纳米羟基磷灰石对Cu^(2+)的吸附  

Adsorption of Cu^(2+) on Nano-hydroxyapatite

作　　者：朱婷婷[1] 于振[1] 吴柳明[1] 

机构地区：[1]济南大学资源与环境学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2011年第2期142-145,共4页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金(20877035)

摘　　要：用溶胶-凝胶法制备纳米羟基磷灰石(n-HAP)吸附水溶液中的铜离子(Cu2+),研究反应时间、体系pH值和Cu2+初始浓度等因素对吸附行为的影响,并探讨吸附机理。结果表明:在溶液pH=4.5~7.5,n-HAP对Cu2+的吸附升高趋势近似线性关系;反应60 min时基本达到吸附平衡;pH>7.5时,溶液中Cu2+几乎完全去除,最大吸附量为51.28 mg/g。n-HAP对Cu2+有良好的吸附作用,吸附类型为Langmu ir等温吸附,吸附过程符合拟二级反应动力学方程。Nano-hydroxyapatite synthesized by sol-gel technique was used to adsorb Cu2＋ from aqueous solution.The effects of reaction time,pH and initial concentration of Cu2＋ on the adsorption were investigated,and the adsorption mechanism was discussed.The results show that the adsorption quantity increases linearly from pH 4.5 to 7.5;the adsorption equilibrium can be achieved in 60min,when pH is higher than 7.5,Cu2＋ is almost completely removed,and the maximum adsorption capacity is 51.28mg/g.n-HAP is an effective adsorbent for Cu2＋,and the adsorption is a process of Langmuir adsorption isotherms,following the pseudo-second-order kinetic equation.

关 键 词：n-HAP CU2+ 吸附 

分 类 号：O643[理学—物理化学]