Removal of Heavy Metals from Aqueous Solution by Hydroxyapatite/Chitosan Composite

被引:9
|
作者
Kusrini, Eny [1 ]
Sofyan, Nofrijon [2 ]
Nurjaya, Dwi M. [2 ]
Santoso, Santoso [1 ]
Tristantini, Dewi [1 ]
机构
[1] Univ Indonesia, Fac Engn, Dept Chem Engn, Kampus Baru UI, Depok 16424, Indonesia
[2] Univ Indonesia, Fac Engn, Dept Met & Mat Engn, Depok 16424, Indonesia
来源
ADVANCES IN MATERIALS, PROCESSING AND MANUFACTURING | 2013年 / 789卷
关键词
Adsorption; Chitosan; Composite; Heavy metals; Hydroxyapatite; CHITOSAN;
D O I
10.4028/www.scientific.net/AMR.789.176
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Hydroxyapatite/chitosan (HApC) composite has been prepared by precipitation method and used for removal of heavy metals (Cr6+, Zn2+ and Cd2+) from aqueous solution. The HAp and 3H7C composite with HAp:chitosan ratio of 3:7 (wt%) were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy-energy dispersive X-ray spectroscopy. The SEM results showed that HAp is spherical-shaped and crystalline, while chitosan has a flat structure. SEM micrograph of 3H7C composite reveals crystalline of HAp uniformly spread over the surface of chitosan. The crystal structure of HAp is maintained in 3H7C composite. Chitosan affects the adsorption capacity of HAp for heavy metal ions; it binds the metal ions as well as HAp. The kinetic data was best described by the pseudo-second order. Surface adsorption and intraparticle diffusion take place in the mechanism of adsorption process. The binding of HAp powder with chitosan made the capability of composite to removal of Cr6+, Zn2+ and Cd2+ from aqueous solution effective. The order of removal efficiency (Cr6+ > Cd2+ > Zn2+) was observed.
引用
收藏
页码:176 / +
页数:2
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