ISL OpenIR  > 青海盐湖研究所知识仓储
Adsorption kinetics of an organic dye by wet hybrid gel monoliths
Liu, Haining1,2; You, Laijiang3; Ye, Xiushen1,2; Li, Wu1; Wu, Zhijian1,3
2008-03-01
Source PublicationJOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume45Issue:3Pages:279-290
SubtypeArticle
AbstractWet 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%.
KeywordHybrid Gel Monolith Erioglaucine Disodium Salt Adsorption Kinetics Internal Diffusion
WOS HeadingsScience & Technology ; Technology
WOS KeywordLINKED CHITOSAN BEADS ; BRILLIANT BLUE FCF ; FUNCTIONAL-GROUPS ; METHYLENE-BLUE ; REACTIVE DYES ; EQUILIBRIUM ; REMOVAL ; XEROGEL ; THERMODYNAMICS ; BIOSORPTION
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000253129300007
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5877
Collection青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
盐湖资源与化学实验室
Affiliation1.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
Recommended Citation
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.
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