Removal of Cr(VI) by magnetite nanoparticle

被引：220
|
作者：
Hu, J [1 ]
Lo, IMC [1 ]
Chen, G [1 ]
机构：
[1] Hong Kong Univ Sci & Technol, Sch Engn, Environm Engn Program, Hong Kong, Hong Kong, Peoples R China
来源：
WATER SCIENCE AND TECHNOLOGY | 2004年 / 50卷 / 12期
关键词：
adsorption; Freundlich; heavy metals; magnetite; zeta-potential;
D O I：
10.2166/wst.2004.0706
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Magnetite nanoparticles were synthesized by sol-gel method. The highly crystalline nature of the magnetite structure with diameter of around 10 nm was characterized with transmission electron microscopy and X-ray diffractometry. The surface area was determined to be 198 m(2)/g. Batch experiments were carried out to determine the adsorption kinetics and mechanism of Cr(VI) by these magnetite nanoparticles. The Cr(VI) uptake was mainly governed by physico-chemical adsorption. The adsorption process was found to be pH and temperature dependent. The adsorption data fit well with the Freundlich isotherm. equation. The Freundlich constants were calculated at different temperatures. The adsorption capacity increased with rising temperature. Preliminary results indicate that magnetite nanoparticles maybe used as an adsorbent for removal of Cr(VI) from wastewater.
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收藏
页码：139 / 146
页数：8
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