Selective adsorption of Hg(II) by gamma-radiation synthesized   silica-graft-vinyl imidazole adsorbent

doi:10.1016/j.jhazmat.2012.11.043

CORC > 北京大学 > 化学与分子工程学院

	Selective adsorption of Hg(II) by gamma-radiation synthesized silica-graft-vinyl imidazole adsorbent
	Sun, Jian ; Chen, Zhimin ; Ge, Mengyi ; Xu, Ling ; Zhai, Maolin
刊名	journal of hazardous materials
	2013
关键词	Silica gamma-Radiation grafting Vinyl imidazole Hg selective adsorption Adsorbent AQUEOUS-SOLUTIONS MESOPOROUS SILICAS ACTIVATED CARBON METAL-IONS MERCURY ADSORPTION POLYIMIDE FILMS WASTE-WATER REMOVAL GEL COPOLYMERIZATION
DOI	10.1016/j.jhazmat.2012.11.043
英文摘要	Silica-based adsorbent was prepared by gamma-radiation induced grafting of vinyl imidazole (VIM) onto the silanized silica, which was silanized by chlorotrimethylsilane (TMCS). The effects of monomer concentration and absorbed dose on the grafting yield were investigated to optimize the reaction conditions. Thermodynamic analysis, FTIR analysis and XPS spectra manifested that VIM was successfully grafted onto the silica surface. The SS-g-VIM adsorbent had excellent selectivity for Hg(II) adsorption in mixture divalent cationic metal solution and a high adsorption capacity of Hg(II). The theoretical maximum adsorption capacity was calculated to be 355.9 mgg(-1) (1.774 mmol g(-1)) in HgCl2/HNO3 solution at pH 5 at room temperature. The adsorption kinetics and adsorption isotherm were investigated. It was found that the Langmuir isotherm model fitted well with the adsorption process and the adsorption of Hg(II) onto SS-g-VIM adsorbent could be considered as a spontaneous, endothermic and chemical sorption process. The comprehensive results suggested that SS-g-VIM adsorbent has potential application for the removal of Hg(II) from wastewater. (C) 2012 Elsevier B.V. All rights reserved.; Engineering, Environmental; Engineering, Civil; Environmental Sciences; SCI(E); EI; PubMed; 17; ARTICLE; 94-101; 244
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/153947]
专题	化学与分子工程学院工学院
推荐引用方式 GB/T 7714	Sun, Jian,Chen, Zhimin,Ge, Mengyi,et al. Selective adsorption of Hg(II) by gamma-radiation synthesized silica-graft-vinyl imidazole adsorbent[J]. journal of hazardous materials,2013.
APA	Sun, Jian,Chen, Zhimin,Ge, Mengyi,Xu, Ling,&Zhai, Maolin.(2013).Selective adsorption of Hg(II) by gamma-radiation synthesized silica-graft-vinyl imidazole adsorbent.journal of hazardous materials.
MLA	Sun, Jian,et al."Selective adsorption of Hg(II) by gamma-radiation synthesized silica-graft-vinyl imidazole adsorbent".journal of hazardous materials (2013).