Adsorption of XSD-296 resin for Cr(VI)

作者：Shu Zeng nian^*; Du Rong jun; Wang Xu; Xiong Chun hua; Li Tao

来源：Transactions of Nonferrous Metals Society of China, 2007, 17(4): 869-873.

DOI：10.1016/S1003-6326(07)60190-3

• XSD-296 resin
• chromium(VI)
• adsorption

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, E-a, is 16.73 kJ/mol, and the thermodynamic parameters are Delta H=11.62 kJ/mol, Delta G(298 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%NaCI-5%NaOH or 5%NH4Cl-5%NH3 center dot 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.

• 出版日期2007-8
• 单位丽水学院; 浙江工商大学