Adsorption of Pb²⁺ on macroporous weak acid adsorbent resin from aqueous solutions: Batch and column studies

来源期刊：中南大学学报(英文版)2009年第4期

论文作者：熊春华 冯宇杰 姚彩萍

文章页码：569 - 575

Key words：Pb²⁺; macroporous weak acid resin; adsorption; thermodynamics

Abstract: The adsorption properties of a novel macroporous weak acid resin (D152) for Pb²⁺ were investigated with chemical methods. The optimal adsorption condition of D152 resin for Pb²⁺ is at pH 6.00 in HAc-NaAc medium. The statically saturated adsorption capacity is 527 mg/g at 298 K. Pb²⁺ adsorbed on D152 resin can be eluted with 0.05 mol/L HCl quantitatively. The adsorption rate constants determined under various temperatures are k_{288 K}=2.22×10^-5 s^-1, k_{298 K}=2.51×10^-5 s^-1, and k_{308 K}= 2.95×10^-5 s^-1, respectively. The apparent activation energy, E_a is 10.5 kJ/mol, and the adsorption parameters of thermodynamics are △H^Θ=13.3 kJ/mol, △S^Θ=119 J/(mol·K), and △G^Θ_{298 K} =-22.2 kJ/mol, respectively. The adsorption behavior of D152 resin for Pb²⁺ follows Langmuir model.

基金信息：the Scientific and Technological Research Planning of Zhejiang Province, China