Efficient Adsorption and Recovery of Pb(II) from Aqueous Solution by a Granular pH-Sensitive Chitosan-based Semi-IPN Hydrogel

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

	Efficient Adsorption and Recovery of Pb(II) from Aqueous Solution by a Granular pH-Sensitive Chitosan-based Semi-IPN Hydrogel
	Huang DJ(黄大建)1,2 ; Wang WB(王文波)1 ; Kang YR(康玉茹)1 ; Wang AQ(王爱勤)1
刊名	Journal of Macromolecular Science Part A Pure and Applied Chemistry
	2012
卷号	49 期号:11 页码:971-979
关键词	Granular hydrogel chitosan gelatin adsorption and recovery heavy metal
ISSN号	1060-1325
通讯作者	王爱勤
英文摘要	A series of granular pH-sensitive semi-interpenetrating polymer network (semi-IPN) hydrogels based on chitosan (CTS), acrylic acid (AA) and gelatine (GE) were utilized for the adsorption and recycle of Pb(II) from aqueous solutions. The composite hydrogels have been characterized by FT-IR and TGA. The effects of contact time, pH value and initial Pb(II) concentration on the adsorption were investigated. Results indicated that the adsorption capacity of the hydrogel increased with increasing pH value and initial Pb(II) concentration, and a pH-sensitive adsorption characteristic was presented. The adsorption rate of the semi-IPN hydrogels on Pb(II) is fast with an adsorption rate constant of 14.9790 mg/(g.s), and adsorption equilibrium could be reached within 10 min. The adsorption isotherms of the hydrogels for Pb(II) could be described well by the Langmuir equation, rather than the Freundlich equation. The as-prepared hydrogels showed good reusability with 0.05 mol/lHNO₃ solutions as the desorbing agent and 0.1 mol/l NaOH solutions as the regeneration agent, respectively. After five consecutive adsorption-desorption processes, the semi-IPN hydrogel with 20 wt% GE may reach 85.26% of its initial adsorption capacity. In addition, the adsorbed Pb(II) can be quantitatively recovered by simply eluting the hydrogel with dilute HNO₃ solution, and a recovery ratio of 89.27% was reached for the semi-IPN hydrogel. The satisfactory adsorption amount is mainly derived from the chelating of functional groups (i.e. -COO- and -NH₂) with Pb(II) ions. The hydrogel adsorbents exhibited excellent affinity for Pb(II), and can be applied to treat wastewater containing heavy metal ion and simultaneously recover the valuable metal sources.
学科主题	功能复合材料
收录类别	SCI
资助信息	the National Natural Science Foundation of China (No. 51003112;21107116);the Science and Technology Support Project of Jiangsu Provincial Science and Technology Department (No. BY2010012)
语种	英语
WOS记录号	WOS:000309705100009
公开日期	2013-03-24
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/2544]
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
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Huang DJ,Wang WB,Kang YR,et al. Efficient Adsorption and Recovery of Pb(II) from Aqueous Solution by a Granular pH-Sensitive Chitosan-based Semi-IPN Hydrogel[J]. Journal of Macromolecular Science Part A Pure and Applied Chemistry,2012,49(11):971-979.
APA	Huang DJ,Wang WB,Kang YR,&Wang AQ.(2012).Efficient Adsorption and Recovery of Pb(II) from Aqueous Solution by a Granular pH-Sensitive Chitosan-based Semi-IPN Hydrogel.Journal of Macromolecular Science Part A Pure and Applied Chemistry,49(11),971-979.
MLA	Huang DJ,et al."Efficient Adsorption and Recovery of Pb(II) from Aqueous Solution by a Granular pH-Sensitive Chitosan-based Semi-IPN Hydrogel".Journal of Macromolecular Science Part A Pure and Applied Chemistry 49.11(2012):971-979.