Adsorption behavior and mechanism of D113 resin for lanthanum

作者：Shu Zengnian; Xiong Chunhua; Shen Qiuxian; Yao Caiping; Gu Zhenyu

来源：Rare Metals, 2007, 26(6): 601-606.

DOI：10.1016/S1001-0521(08)60013-3

• adsorption
• macroporous weak acid resin
• lanthanum
• mechanism
• kinetics

The sorption properties of macroporous weak acid resin (D113) for La3+ ion were studied by chemical analysis and IR spectra. Experimental results indicate that the D113 resin has a good adsorption ability for La3+ at pH = 6.0 in the HAc-NaAc medium. The statically saturated adsorption capacity is 273.3 mg/g. Separation coefficients of ss(3+)(La)/(3+)(Ce), ss(3+)(La)/(3+)(Gd), ss(3+)(La)/(3+)(Er), and ss(3+)(La)/(3+)(Y) are 2.29, 3.64, 4.27, and 0.627, respectively. The apparent activation energy of adsorption, E-a is 18.4 kJ/mol, the thermodynamics parameters Delta H, Delta S, and Delta G of sorption are 4.53 kJ/mol, 61.8 J/(mol center dot K), -13.9 kJ/mol, respectively. The adsorption behavior of D113 for La3+ obeys the Freundlich isotherm. La3+ adsorbed on resin can be eluted by 2.0 mol/L HCl quantitatively.

• 出版日期2007-12
• 单位浙江工商大学; 丽水学院