Removal of lead from aqueous solution by hydroxyapatite/manganese dioxide composite

被引：28
作者：
Dong, Lijing [1 ,2 ]
Zhu, Zhiliang [1 ]
Qiu, Yanling [1 ]
Zhao, Jianfu [3 ]
机构：
[1] Minist Educ, Key Lab Yangtze River Water Environm, Shanghai 200092, Peoples R China
[2] Environm Monitoring Ctr Changzhou, Changzhou 213000, Peoples R China
[3] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
来源：
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING | 2016年 / 10卷 / 01期
基金：
中国国家自然科学基金;
关键词：
manganese dioxide; hydroxyapatite; lead; adsorption; composite materials; HYDROUS MANGANESE-DIOXIDE; SINGLE-METAL; HEAVY-METAL; HUMIC-ACID; ADSORPTION; SORPTION; CADMIUM; CATIONS; PB(II); IONS;
D O I：
10.1007/s11783-014-0722-5
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A novel composite adsorbent, hydroxyapatite/manganese dioxide (HAp/MnO2), has been developed for the purpose of removing lead ions from aqueous solutions. The combination of HAp with MnO2 is meant to increase its adsorption capacity. Various factors that may affect the adsorption efficiency, including solution pH, coexistent substances such as humic acid and competing cations (Ca2+, Mg2+), initial solute concentration, and the duration of the reaction, have been investigated. Using this composite adsorbent, solution pH and coexistent calcium or magnesium cations were found to have no significant influence on the removal of lead ions under the experimental conditions. The adsorption equilibrium was described well by the Langmuir isotherm model, and the calculated maximum adsorption capacity was 769 mg.g(-1). The sorption processes obeyed the pseudo-second-order kinetics model. The experimental results indicate that HAp/MnO2 composite may be an effective adsorbent for the removal of lead ions from aqueous solutions.
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收藏
页码：28 / 36
页数：9
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