ADSORPTION OF THE LOW CONCENTRATION CR (VI) ON MAGNETIC CHITOSAN/PVA HYDROGEL BEADS

被引：0
|
作者：
Yi, Na [1 ]
Wu, Yaoguo [1 ]
Wei, Jianguo [1 ]
Zhang, Sheng [1 ]
Ji, Puhui [2 ]
机构：
[1] Northwestern Polytech Univ, Sch Sci, Dept Appl Chem, Xian 710129, Peoples R China
[2] Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Peoples R China
来源：
FRESENIUS ENVIRONMENTAL BULLETIN | 2016年 / 25卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Chitosan; Cr (VI); Polyvinyl alcohol (PVA); Adsorption; Magnetic hydrogel beads; OXIDE COMPOSITE; WASTE-WATER; REMOVAL; MICROSPHERES; CR(VI); IONS;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Cr (VI) is one of the toxic heavy metals and how to effectively reduce the excessive amounts of Cr (VI) in wastewater to safe concentration has received increasing attention. In this study, magnetic chitosan/PVA hydrogel beads (MCPHB) were prepared and used for Cr (VI) removal. The effects of initial pH value, absorbent dose, contact time, temperature, and the initial concentration of Cr (VI) solution were investigated. The results indicated that the maximum adsorption quantity was 2.21 mg g(-1), and the optimum pH appeared at pH=3. The kinetics of adsorption is better fitted by the pseudo-second order equation, and adsorption isotherms are better described by the Langmuir equation. The residual concentration of Cr (VI) in the solution can meet the National Standard of drinking water. The results indicated that MCPHB can be used as promising adsorbents for the removal of Cr (VI) from low concentration wastewater.
引用
收藏
页码：2174 / 2182
页数：9
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