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Boron adsorption using a new boron-selective hybrid gel and thecommercial resin D564
Liu, Haining; Ye, Xiushen; Li, Quan; Kim, Taehoon; Qing, Binju; Guo, Min; Ge, Fei; Wu, Zhijian; Lee, Kangtaek
2009
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume341Issue:1-3Pages:118-126
Contribution RankSCI
KeywordBoron Adsorption Boron-selective Resin Hybrid Gel Adsorption
LanguageA 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.
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/2105
Collection青海盐湖研究所知识仓储
盐湖资源与化学实验室
科研管理、支撑部门
Recommended Citation
GB/T 7714
Liu, Haining,Ye, Xiushen,Li, Quan,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 Liu, Haining.,Ye, Xiushen.,Li, Quan.,Kim, Taehoon.,Qing, Binju.,...&Lee, Kangtaek.(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 Liu, Haining,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.
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