High efficient removal of lead from aqueous solution by preparation of novel PPG-nZVI beads as sorbents

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• 作者：Haiyan Lip>ap> ; Yu Gep>bp> ; Xiaoran Zhangp>ap>p> ; p>p>zhangxiaoran@bucea.edu.cnp>
• 关键词：Nanoscale zerovalent iron (nZVI) ; PPG-nZVI beads ; Pb2+ ; Adsorption
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2017
• 出版时间：5 January 2017
• 年：2017
• 卷：513
• 期：Complete
• 页码：306-314
• 全文大小：2257 K
• 卷排序：513

文摘

PVA and pumice synthetized guar gum nZVI beads (PPG-nZVI beads) were prepared by flocculation reaction. The PPG-nZVI beads before and after adsorption were characterized by SEM, XPS and FTIR. The removal rates increased with increasing PPG-nZVI beads dosage but decreased with the increase in initial concentration of Pb2+ and ionic strength. The removal of Pb2+ can be explained to adsorption and co-precipitation. The adsorption data of Pb2+ by PPG-nZVI beads can be well fitted with second-order kinetic model and Langmuir isotherm model.