Removal of Co(Ⅱ) from aqueous solutions by NKC-9 strong acid resin
来源期刊：中国有色金属学报(英文版)2010年第6期
论文作者：熊春华 冯宇杰 姚彩萍 沈忱
文章页码：1141 - 1147
Key words：strong acid resin; ion exchange; Co(Ⅱ); adsorption isotherm
Abstract: A strong acidic ion exchange resin (NKC-9) was used as a new adsorbent material for the removal of Co(Ⅱ) from aqueous solutions. The adsorption isotherm follows the Langmuir model. The maximum adsorption capacity of the resin for Co(Ⅱ) is evaluated to be 361.0 mg/g by the Langmuir model. It is found that 0.5 mol/L HCl solution provides effectiveness of the desorption of Co(Ⅱ) from the resin. The adsorption rate constants determined at 288, 298 and 308 K are 7.12×10-5, 8.51×10-5 and 9.85×10-5 s-1, respectively. The apparent activation energy (Ea) is 12.0 kJ/mol and the adsorption parameters of thermodynamic are ΔHΘ =16.1 kJ/mol, ΔSΘ=163.4 J/(mol·K), ΔGΘ298 K=-32.6 kJ/mol, respectively. The adsorption of Co(Ⅱ) on the resin is found to be endothermic in nature. Column experiments show that it is possible to remove Co(Ⅱ) ions from aqueous medium dynamically by NKC-9 resin.
基金信息：Zhejiang Provincial Scientific and Technological Research Planning, China
the Key Grant of Education Department of Zhejiang Province, China
