ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 17    No. 4    August 2007

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Adsorption of XSD-296 resin for Cr(Ⅵ)
SHU Zeng-nian(舒增年)1, DU Rong-jun(杜荣军)2, WANG Xu(王 旭)1,
Xiong Chun-hua(熊春华)3, LI Tao(李 涛)2
(1. Department of Chemistry, Lishui University, Lishui 323000, China;
2. Xi’an Power Resin Factory, Xi’an 710038, China;
3. Department of Applied Chemistry, Biotechnology and Environmental Engineering,
Zhejiang Gongshang University, Hangzhou 310035, China
)
Abstract: The adsorption properties of XSD-296 for Cr(Ⅵ) were studied by using chemical analysis and infrared spectrometry. Experimental results show that XSD-296 resin has a good adsorption ability for Cr(Ⅵ) at pH=2.6 in the HAc-NaAc medium. The statically saturated adsorption capacity is 235 mg/g resin. The apparent activation energy of adsorption reaction, Ea, is 16.73 kJ/mol, and the thermodynamic parameters are ∆H=11.62 kJ/mol, ∆G298 K=−4.13 kJ/mol. The adsorption behavior of resin for Cr(Ⅵ) is in accordance with Freundlich adsorption isotherm. Cr(Ⅵ) adsorbed on resin can be eluted by 5%NaCl-5%NaOH or 5%NH4Cl-5%NH3∙H2O quantitatively. Infrared spectra and adsorption mechanism show that the functional group of resin coordinates with Cr(Ⅵ) to form co-ordination compound. The coordination molar ratio of the functional group of resin to Cr(Ⅵ) is 1׃1.
Key words: XSD-296 resin; chromium(Ⅵ); adsorption
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
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