Boron adsorption using a new boron-selective hybrid gel and thecommercial resin D564

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 青海盐湖研究所知识仓储

	Boron adsorption using a new boron-selective hybrid gel and thecommercial resin D564
	Li, Quan; Liu, Haining; Qing, Binju; Ye, Xiushen; Wu, Zhijian; Ge, Fei; Guo, Min
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2009
卷号	341 期号:1-3 页码:118-126
关键词	Boron Adsorption Boron-selective resin Hybrid gel Adsorption
ISSN号	0927-7757
语种	A new hybrid gel with boron-selective functional groups is prepared with tetraethoxysilane (TEOS), (3-glycidoxypropyl)trimethoxysilane (GPTMS), and a new precursor (W) synthesized from GPTMS and N-methylglucamine (MG). We investigate the boron adsorption onto the hybrid gel and the commercial resin D564 in aqueous solution by varying the initial boron concentration, pH, ionic strength, and temperature. Adsorption of both the hybrid gel and the D564 can be described by the second-order kinetics and the hybrid gel shows the lower second-order rate constant and the initial adsorption rate than the commercial resin. A maximum boron adsorption occurs at pH 4-9, which can be explained by the adsorption suppression by H(+) ions at low pH and the weakened complexation by electrostatic repulsion at high pH. Ionic strength of the Solution affects both the adsorption kinetics and thermodynamics, and it has a more pronounced effect on the kinetics of the hybrid gel than the D564. For both the hybrid gel and the D564, adsorption was found to be a chemisorption, which may be more advantageous in removal of boron from water than physisorption due to a higher adsorption capacity and better selectivity. Compared with other boron-selective adsorbents, the boron-selective hybrid gel in this study is easy to prepare, and has a good mechanical strength and an adsorption capacity (1.15 mmol g(-1)). (C) 2009 Elsevier B.V. All rights reserved. A new hybrid gel with boron-selective functional groups is prepared with tetraethoxysilane (TEOS), (3-glycidoxypropyl)trimethoxysilane (GPTMS), and a new precursor (W) synthesized from GPTMS and N-methylglucamine (MG). We investigate the boron adsorption onto the hybrid gel and the commercial resin D564 in aqueous solution by varying the initial boron concentration, pH, ionic strength, and temperature. Adsorption of both the hybrid gel and the D564 can be described by the second-order kinetics and the hybrid gel shows the lower second-order rate constant and the initial adsorption rate than the commercial resin. A maximum boron adsorption occurs at pH 4-9, which can be explained by the adsorption suppression by H(+) ions at low pH and the weakened complexation by electrostatic repulsion at high pH. Ionic strength of the Solution affects both the adsorption kinetics and thermodynamics, and it has a more pronounced effect on the kinetics of the hybrid gel than the D564. For both the hybrid gel and the D564, adsorption was found to be a chemisorption, which may be more advantageous in removal of boron from water than physisorption due to a higher adsorption capacity and better selectivity. Compared with other boron-selective adsorbents, the boron-selective hybrid gel in this study is easy to prepare, and has a good mechanical strength and an adsorption capacity (1.15 mmol g(-1)). (C) 2009 Elsevier B.V. All rights reserved.
公开日期	2013-10-07
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/2105]
专题	青海盐湖研究所_青海盐湖研究所知识仓储青海盐湖研究所_盐湖资源与化学实验室青海盐湖研究所_管理部门
推荐引用方式 GB/T 7714	Li, Quan,Liu, Haining,Qing, Binju,et al. Boron adsorption using a new boron-selective hybrid gel and thecommercial resin D564[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2009,341(1-3):118-126.
APA	Li, Quan.,Liu, Haining.,Qing, Binju.,Ye, Xiushen.,Wu, Zhijian.,...&Guo, Min.(2009).Boron adsorption using a new boron-selective hybrid gel and thecommercial resin D564.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,341(1-3),118-126.
MLA	Li, Quan,et al."Boron adsorption using a new boron-selective hybrid gel and thecommercial resin D564".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 341.1-3(2009):118-126.