碳羟磷灰石(CHAP)吸附废水中锰离子的动力学研究  

Kinetic Studies for Mn^(2+) Adsorption from Wastewater by Synthetic Carbonate Hydroxyapatite

作　　者：廖德祥[1] 蔡宏辉[1] 钟琼[2] 

机构地区：[1]上海海事大学海洋环境与工程学院,上海201306 [2]长沙环境保护职业技术学院环境工程系,湖南长沙410082

出　　处：《中国锰业》2012年第1期23-26,共4页China Manganese Industry

基　　金：国家自然科学基金青年项目(51109126);上海市自然科学基金项目(11ZR1415000);上海市教委科研创新项目(12YZ123)

摘　　要：主要研究了碳羟磷灰石(CHAP)对二价锰离子的吸附性能。从pH、吸附时间及初始Mn2+浓度3方面对吸附能力的影响进行吸附试验。试验结果表明:在常温常压,CHAP吸附Mn2+的最佳pH值为6,最佳吸附时间为60 min,吸附量达到22.44mg/g。CHAP对Mn2+的吸附过程符合准二级反应动力学模型。CHAP吸附Mn2+的能力随着废水中Mn2+浓度增加而增加,最大的吸附量达24.29mg/g,CHAP对Mn2+的吸附符合Langmuir吸附等温式。Sorption potential of Carbonate hydroxylapatite for Mn2＋ from synthetic wastewater was ex- plored. The effects of pH, contact time and initial concentration were studied in batch experiments. The maxi- mum uptake of metal ions was obtained at pH 6.0. Sorption equilibrium was established by 60 min. The pseudo- second-order kinetic model provided well correlation（ R2 〉 0.99）of the used experimental data. The adsorption of M n2＋ by CHAP increased as the initial M n2 ＋concentration increased. The maximum M n2＋ adsorbed was found to be 22.44 mg/g. It was found that the sorption of M n2 ＋ on CHAP was correlated well（ R2 = 0. 998 5）with the Langmuir equation under the concentration range.

关 键 词：碳羟磷灰石 Mn2+ 吸附动力学 吸附等温线 

分 类 号：X703[环境科学与工程—环境工程]