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| Characterization of Cu（Ⅱ） Ion Adsorption Behavior of the Polyacrylic Acid-Polyvinylidene Fluoride Blended Polymer | |
| 引用本文： | 宋来洲,;王继斌,;郑秋艳,;张尊举.Characterization of Cu（Ⅱ） Ion Adsorption Behavior of the Polyacrylic Acid-Polyvinylidene Fluoride Blended Polymer[J].清华大学学报,2008,13(2):249-256. |
| 作者姓名： | 宋来洲 ;王继斌 ;郑秋艳 ;张尊举 |
| 作者单位： | [1]Department of Environmental & Chemical Engineering, Yanshan University, Qinhuangdao 066004, China; [2]Environmental Management College of China, Qinhuangdao 066004, China |
| 摘 要： | A blended polymer adsorbent prepared using acrylic acid and polyvinylidene fluoride was used to remove copper from aqueous solutions. The polymer was prepared using thermally induced polymerization and phase inversion. The blended polymer was characterized by X-ray diffraction analysis （XRD）, environ- mental scanning electron microscopy （ESEM）, X-ray photoelectron spectroscopy （XPS）, and N2 adsorption/desorption experiments. The sorption data was fit to linearized adsorption isotherms of the Langmuir, Freundlich, and Dubinin-Radushkevich （D-R） isotherms models. The batch sorption kinetics was evaluated using pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic reaction models. △H0 is greater than 0, AGo is lower than 0, and △S0 is greater than 0, which shows that the adsorption of Cu （Ⅱ） by the blended polymer is a spontaneous, endothermic process. The adsorption isotherm fits better to the Freundlich isotherm model and the pseudo-second-order kinetics model gives a better fit to the batch sorption kinetics. The adsorption mechanism is assumed to be ion exchange between the cupric ion and the carboxylic acid functional group of the blended polymer. |
| 关 键 词： | 铜离子 吸附作用 聚偏二氟乙烯 环境保护 水处理技术 |
Characterization of Cu(II) Ion Adsorption Behavior of the Polyacrylic Acid-Polyvinylidene Fluoride Blended Polymer |
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| Laizhou Song, »&#x; , Jibin Wang, î , Qiuyan Zheng, Ë&#x;,Zunju Zhang, Êî.Characterization of Cu(II) Ion Adsorption Behavior of the Polyacrylic Acid-Polyvinylidene Fluoride Blended Polymer[J].Tsinghua Science and Technology,2008,13(2):249-256. | |
| Authors: | Laizhou Song »&#x; Jibin Wang î Qiuyan Zheng Ë&#x; Zunju Zhang Êî |
| Institution: | aDepartment of Environmental & Chemical Engineering, Yanshan University, Qinhuangdao 066004, China bEnvironmental Management College of China, Qinhuangdao 066004, China |
| Abstract: | A blended polymer adsorbent prepared using acrylic acid and polyvinylidene fluoride was used to remove copper from aqueous solutions. The polymer was prepared using thermally induced polymerization and phase inversion. The blended polymer was characterized by X-ray diffraction analysis (XRD), environmental scanning electron microscopy (ESEM), X-ray photoelectron spectroscopy (XPS), and N2 adsorption/desorption experiments. The sorption data was fit to linearized adsorption isotherms of the Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherms models. The batch sorption kinetics was evaluated using pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic reaction models. ΔH° is greater than 0, ΔG° is lower than 0, and ΔS° is greater than 0, which shows that the adsorption of Cu (II) by the blended polymer is a spontaneous, endothermic process. The adsorption isotherm fits better to the Freundlich isotherm model and the pseudo-second-order kinetics model gives a better fit to the batch sorption kinetics. The adsorption mechanism is assumed to be ion exchange between the cupric ion and the carboxylic acid functional group of the blended polymer. |
| Keywords: | copper ions heavy metal isotherms sorption thermodynamics kinetics equation |
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