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标题：Removal of Pb2+ and Cu2+ from their aqueous solutions by functionalized polyamide 6.6 yarns with N-allyliminodiacetic acid
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作者：El Bouchti M. ; Grancaric A.M. ; Botteri L. 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2015
卷号：6
期号：1
页码：146-154
出版社：University of Mohammed Premier Oujda
摘要：The removal of copper (Cu 2+ ), and lead (Pb 2+ ) ions fro m aqueous solutions with the functionalized Polyamide 6.6 Yarns with N -Allyliminodiacetic Acid to 20% (PA6.6-ALD -20%) chelating ion exchange fiber is described at different conditions. The removal of the above mentioned heavy metal ions fro m aqueous solutions was studied by batch method. The effects o f initial metal concentration, contact time and pH on the removal of Cu 2+ and Pb 2+ ions were investigated. The percentage adsorption of Cu 2+ and Pb 2+ ions increased with an increase in contact time. The binding process was strongl y affected by pH and the optimum pH for Cu 2+ and Pb 2+ ions were 5.0 and 6.0, respectively. The kinetic data was evaluated with the pseudo-first order and pseudo-second order models. Kinetic data correlated well with the pseudo -second-order kinetic model, indicating that the chemical adsorption was the rate-limiting step. The adsorption parameters were determined based on Langmuir and Freundlich isotherm models. The maximum adsorption capacity of the adsorbent for Cu 2+ and Pb 2+ ions was calculated from the Langmuir isotherm and found to be 6.17 and 8.06 mg/g, respectively. Actually the percentage of removing Cu 2+ and Pb 2+ ions reached maximum to 55% and 78%, respectively
关键词：Adsorption; Chelating ion exchange fiber; N;allyliminodiacetic acid; Isotherms; Kinetics