Response surface methodology for optimizing adsorption performance of gel-type weak acid resin for Eu(Ⅲ)  

响应面法优化凝胶型弱酸性树脂对铕(Ⅲ)的吸附性能(英文)

作　　者：陈婷[1] 李斌[1] 方磊 陈德睢 许文斌[1] 熊春华[1] 

机构地区：[1]浙江工商大学化学应用系,杭州310018 [2]Department of Food Science and Human Nutrition,University of Florida

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第12期4207-4215,共9页中国有色金属学报（英文版）

基　　金：Project(20133326110006)supported by Ph D Programs Foundation of Ministry of Education of China;Project(2014R408073)supported by College Student Innovation Projects of Zhejiang Province;China;Project supported by Zhejiang Provincial Key Laboratory of Industrial Textile Materials&Manufacturing Tech;China

摘　　要：The conditions relating to enhanced adsorption procedure of earth element europium（Eu） onto gel-type weak acid resin（110-H） in aqueous solution were optimized by means of the response surface methodology（RSM）, which proved that 110-H owned satisfactory adsorption capacity（346.85 mg/g） in optimum conditions, belonging to one of the high adsorption capacity materials. Then, the adsorption and desorption behaviors were investigated by batch studies. The adsorption performance showed high agreement with the Lagergren-first-order model and Langmuir isotherm with thermodynamic adsorption parameters of ΔH= 36.1 k J/mol and ΔS=200 J/（mol·K）. Desorption study revealed that 110-H could be effectively eluted by a low concentration of HCl solution（0.1 mol/L） to regenerate and reuse. Finally, the 110-H and Eu（III） loaded 110-H were characterized by IR spectroscopy and scanning electron microscope（SEM） to analyze the mechanism of adsorption, which proved to be chemisorbed.通过响应面法,对增强凝胶型弱酸性树脂(110-H)在水溶液中对稀土元素铕的吸附作用进行优化。实验表明在最佳条件下110-H对铕的吸附量(346.85 mg/g)令人满意,是目前对铕离子吸附量最高的材料之一。吸附过程拟合一级反应动力学和朗缪尔等温线模型,吸附热力学参数分别为ΔH=36.1 k J/mol,ΔS=200 J/(mol·K)。解吸实验表明110-H可以用浓度为0.1 mol/L的HCl溶液洗脱以实现再生。用红外光谱和扫描电镜技术对比树脂吸附金属离子前、后特征以分析其吸附机理。

关 键 词：Eu（III） response surface methodology ADSORPTION gel-type weak acid resin 

分 类 号：O647.3[理学—物理化学]