Adsorption kinetics of an organic dye by wet hybrid gel monoliths

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

	Adsorption kinetics of an organic dye by wet hybrid gel monoliths
	Liu, Haining 1,2; You, Laijiang 3; Ye, Xiushen 1,2; Li, Wu 1; Wu, Zhijian 1,3
刊名	JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
	2008-03-01
卷号	45 期号:3 页码:279-290
关键词	Hybrid Gel Monolith Erioglaucine Disodium Salt Adsorption Kinetics Internal Diffusion
文献子类	Article
英文摘要	Wet hybrid gel monoliths are prepared with bis(trimethoxysilylpropyl)amine (TSPA) or the mixture of TSPA with n-propyltriethoxysilane (PTES) or bis(trimethoxysilyl)hexane (TSH) or tetraethoxysilane (TEOS) as precursors. The adsorption kinetics of an organic dye (erioglaucine disodium salt, EDS) by the gel monoliths in aqueous solutions is studied comprehensively. The effects of temperature, pH, and ionic strength on the adsorption kinetics are investigated. Kinetic studies show that in general the kinetic data are well described by the pseudo second-order kinetic model. Initial adsorption rate increases with the increase in temperature, but decreases with the increase in solution pH and ionic strength. The adsorption activation energy is found to be 17-51 kJ mol(-1) under our experimental conditions. The internal diffusion of the dye into the hybrid gels appears to be the rate-limiting step of the overall adsorption process. The adsorption is promoted by hydrogen bonding, hydrophobic and electrostatic attractions in acidic or neutral solutions, suppressed by the electrostatic repulsion in basic solutions and by the ionic exchange competition of Cl- with the dye anions in solutions with a high NaCl concentration. After adsorption for 165 h, all the gel monoliths present a linear shrinkage less than 10%.
WOS关键词	LINKED CHITOSAN BEADS ; BRILLIANT BLUE FCF ; FUNCTIONAL-GROUPS ; METHYLENE-BLUE ; REACTIVE DYES ; EQUILIBRIUM ; REMOVAL ; XEROGEL ; THERMODYNAMICS ; BIOSORPTION
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000253129300007
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/5877]
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_盐湖资源综合利用工程技术中心青海盐湖研究所_盐湖资源与化学实验室
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Huaqiao Univ, Coll Mat Sci & Engn, Quanzhou 362021, Peoples R China
推荐引用方式 GB/T 7714	Liu, Haining,You, Laijiang,Ye, Xiushen,et al. Adsorption kinetics of an organic dye by wet hybrid gel monoliths[J]. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,2008,45(3):279-290.
APA	Liu, Haining,You, Laijiang,Ye, Xiushen,Li, Wu,&Wu, Zhijian.(2008).Adsorption kinetics of an organic dye by wet hybrid gel monoliths.JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,45(3),279-290.
MLA	Liu, Haining,et al."Adsorption kinetics of an organic dye by wet hybrid gel monoliths".JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 45.3(2008):279-290.