Adsorption behavior of gel-type weak acid resin (110-H) for Pb(2+)

作者：Xiong Chun hua^*; Yao Cai ping

来源：Transactions of Nonferrous Metals Society of China, 2008, 18(5): 1290-1294.

DOI：10.1016/S1003-6326(08)60219-8

• gel-type weak acid resin
• adsorption
• lead
• mechanism

The adsorption properties of a novel gel-type weak acid resin (110-H) for Pb(2+) were investigated using chemical methods and IR spectrometry. The optimal adsorption condition of 110-H for Pb(2+) is at pH=6.49 in HAc-NaAc medium and the statically saturated adsorption capacity is 485 mg/g at 298 K. Pb(2+) adsorbed on 110-H resin can be eluted with 0.025 mol/L HCl quantificationally. The adsorption rate constants determined under the temperatures of 288, 298, 308 and 318 K are 2.46 x 10(-5), 3.82 x 10(-5), 4.46 x 10(-5) and 5.71 x 10(-5) s(-1), respectively. The apparent activation energy, E(a), is 18.1 kJ/mol and the thermodynamic parameters of adsorption, Delta H=20.9 kJ/mol, Delta S=161 J/(mol.K) and Delta G(298) (K) = -48.0 kJ/mol, respectively. The adsorption behavior of 110-H resin for Pb(2+) accords with the Langmuir isotherm. Infrared spectra show that the oxygen atoms of the functional group of resin coordinate with Pb(2+) to form the coordination bands.

• 出版日期2008-10
• 单位浙江工商大学