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Adsorption behavior of Cd(II) from aqueous solutions onto gel-type weak acid resin
Xiong, Chunhua1; Yao, Caiping1; Wang, Li1; Ke, Jiajun2; Xiong, CH
2009-09-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume98Issue:3-4Pages:318-324
AbstractThe adsorption and desorption behaviors of Cd(II) on gel-type weak acid resin (GTWAR) have been investigated. The influence of operational conditions such as contact time. initial concentration of Cd(II), initial pH of solution and temperature on the adsorption of Cd(II) has also been examined. The results show that the optimal adsorption condition of GTWAR for Cd(II) is achieved at pH = 5.95 in HAc-NaAc medium. The maximum uptake capacity of Cd(II) is 282 mg/g GTWAR at 298 K. The adsorption of Cd(II) follows the Langmuir isotherm and Freundlich isotherm, and the correlation coefficients have been evaluated. Even kinetics on the adsorption of Cd(II) has been studied. The apparent activation energy E(a) and adsorption rate constant k(298) values are 2.95 kJ/mol and 3.02 x 10(-5) s(-1), respectively. The calculation data of thermodynamic parameters which Delta S value of 110 J/(mol K) and Delta H value of 13.1 kJ/mol indicate the endothermic nature of the adsorption process. Whilst, a decrease of Gibb's free energy (Delta G) with increasing temperature indicates the spontaneous nature of the adsorption process. Finally, Cd(II) can be eluted by using 0.5 mol/L HCl solution and the gel-type weak acid resin can be regenerated and reused. The sample was described by IR spectroscopy and scanning electron micrographs (SEM). (C) 2009 Elsevier B.V. All rights reserved.
KeywordGel-type Weak Acid Resin (Gtwar) Cd(Ii) Adsorption Kinetics Thermodynamics
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2009.05.008
Indexed BySCI
Language英语
WOS KeywordION-EXCHANGE ; METAL-IONS ; SYNTHETIC RESIN ; SORPTION BEHAVIOR ; WASTE-WATER ; FIXED-BED ; FLY-ASH ; REMOVAL ; CU2+ ; NI2+
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000268439800019
Citation statistics
Cited Times:54[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6594
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorXiong, CH
Affiliation1.Zhejiang Gongshang Univ, Dept Appl Chem, Hangzhou 310035, Zhejiang, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Xiong, Chunhua,Yao, Caiping,Wang, Li,et al. Adsorption behavior of Cd(II) from aqueous solutions onto gel-type weak acid resin[J]. HYDROMETALLURGY,2009,98(3-4):318-324.
APA Xiong, Chunhua,Yao, Caiping,Wang, Li,Ke, Jiajun,&Xiong, CH.(2009).Adsorption behavior of Cd(II) from aqueous solutions onto gel-type weak acid resin.HYDROMETALLURGY,98(3-4),318-324.
MLA Xiong, Chunhua,et al."Adsorption behavior of Cd(II) from aqueous solutions onto gel-type weak acid resin".HYDROMETALLURGY 98.3-4(2009):318-324.
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