Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 环境材料与生态化学研究发展中心

	Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups
	Zhu YF(朱永峰)1,2 ; Zheng YA(郑易安)1,3 ; Wang WB(王文波)1 ; Wang AQ(王爱勤)1 ; Wang AQ(王爱勤)
刊名	Journal of Water Process Engineering
	2015
卷号	7 页码:218-226
关键词	Granular hydrogel Redox polymerization Adsorption
ISSN号	2214-7144
通讯作者	王爱勤
英文摘要	A series of granular hydrogels containing carboxy group and thiourea group were prepared by a facile redox-initiated polymerization in air atmosphere at room temperature, and then were used as the adsorbents for efficient adsorption of Pb(II) and Hg(II). The variables affecting the adsorption capacity were systematically investigated, including pH, initial concentration, contact time, and desorption and reusability. The results indicate that the as-prepared adsorbent has fast adsorption kinetics and high adsorption capacity, in particular for Hg(II), with the equilibrium time of about 40 min and the maximum adsorption capacity of 1106.72 mg/g for Hg(II). Over the pH range studied, this granular hydrogel shows insignificant changes in the adsorption capacity for Hg(II), while some noticeable differences are visible for Pb(II). The adsorption process for Pb(II) and Hg(II) can be described using the pseudo-second-order kinetic model and the equilibrium isotherm matches well with the Langmuir model. The reusability demonstrates that after five adsorption–desorption cycle, a high adsorption capacity is still observed for Pb(II) and Hg(II), though a decreasing tendency is inevitable. Consequently, the as-prepared granular hydrogel can be recognized as an effective adsorbent for the removal and recovery of heavy metal ions, especially for Hg(II) from aqueous solution.
学科主题	环境材料与生态化学
资助信息	the National Natural Science Foundation of China (21377135;21477135;51403221);“863” Project of the Ministry of Science and Technology, China (2013AA032003);the Fundamental Research Funds for the Central Universities (lzujbky-2015-127)
语种	英语
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/18854]
专题	兰州化学物理研究所_环境材料与生态化学研究发展中心
通讯作者	Wang AQ(王爱勤)
作者单位	1.Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China 2.University of the Chinese Academy of Sciences, Beijing 100049, PR China 3.Key Laboratory for Environment Pollution Prediction and Control, Gansu Province, College of Earth and Environment Sciences, Lanzhou University, Lanzhou 730000, PR China
推荐引用方式 GB/T 7714	Zhu YF,Zheng YA,Wang WB,et al. Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups[J]. Journal of Water Process Engineering,2015,7:218-226.
APA	Zhu YF,Zheng YA,Wang WB,Wang AQ,&王爱勤.(2015).Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups.Journal of Water Process Engineering,7,218-226.
MLA	Zhu YF,et al."Highly efficient adsorption of Hg(II) and Pb(II) onto chitosan-based granular adsorbent containing thiourea groups".Journal of Water Process Engineering 7(2015):218-226.