Adsorption and desorption properties of D318 resin for Cr(Ⅵ)
来源期刊：中南大学学报(英文版)2009年第3期
论文作者：舒增年 熊春华
文章页码：405 - 409
Key words：Cr(Ⅵ); D318 resin; adsorption; desorption; dynamics; thermodynamics
Abstract: The adsorption capability of D318 resin for Cr(Ⅵ) was investigated by chemistry analysis. Experimental results show that D318 resin has the best adsorption ability for Cr(Ⅵ) at pH=3.16 in HAc-NaAc medium. The statically saturated adsorption capacity of the resin is 265.4 mg/g. The thermodynamic adsorption parameters, enthalpy change ΔH and free energy change ΔG298 of the adsorption reaction are 4.81 and -5.16 kJ/mol, respectively. The apparent activation energy Ea is 22.4 kJ/mol. The adsorption behavior obeys the Freundlich isotherm. The molar coordination ratio of the functional group of resin to Cr(Ⅵ) is 3:2. Cr(Ⅵ) adsorbed on D318 resin can be eluted by 5%NaOH-5%NaCl quantitatively.
基金信息：the Natural Science Foundation of Zhejiang Province, China
