Removal of Heavy Metal Ions from Water by Magnetic Cellulose-Based Beads with Embedded Chemically Modified Magnetite Nanoparticles and Activated Carbon

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• 作者：Xiaogang Luo ; Xiaojuan Lei ; Ning Cai ; Xiuping Xie ; Yanan Xue ; Faquan Yu
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：July 5, 2016
• 年：2016
• 卷：4
• 期：7
• 页码：3960-3969
• 全文大小：588K
• 年卷期：0
• ISSN：2168-0485

文摘

For the removal of heavy metal ions from water, new resources should be exploited to design more efficient, environmentally friendly adsorbents. To tackle this challenge, millimeter-scale magnetic cellulose-based beads with micro- and nanopore structure were fabricated via an optimal extrusion dropping technology from NaOH/urea aqueous solution. The composite beads incorported with carboxyl decorated magnetite nanoparticles and nitric acid modified activated carbon have convenient operation based on sensitive magnetic response and highly effective removal performance for Cu²⁺, Pb²⁺, and Zn²⁺. Their structure and properties were investigated. Moreover, the adsorption equilibrium, kinetics, and thermodynamics of Cu²⁺, Pb²⁺, and Zn²⁺ by the prepared composite adsorbents were examined. The results revealed that these adsorption processes were spontaneous endothermic reactions and determined by combination of physical and chemical adsorptive mechanisms.