<cite id="ahl54"></cite>
        <tt id="ahl54"><noscript id="ahl54"></noscript></tt>
        <ruby id="ahl54"><optgroup id="ahl54"></optgroup></ruby>
        <rp id="ahl54"><optgroup id="ahl54"><acronym id="ahl54"></acronym></optgroup></rp>
        <s id="ahl54"><table id="ahl54"></table></s>
        <source id="ahl54"><nav id="ahl54"><button id="ahl54"></button></nav></source>
        <rt id="ahl54"><optgroup id="ahl54"></optgroup></rt>
      1. 聯系我們
        • 聯系電話


        • 聯系人


        • 郵箱


        • 郵編


        • 學院地址


        Absorption performance of DMSA......

        來源:本站 發布時間:2018年04月12日 作者:
        Title: Absorption performance of DMSA modified Fe3O4@SiO2 core/shell magnetic nanocomposite for Pb2+ removal
        Journal: Journal of Central South University
        Authors: Tian Qinghua, Wang Xiaoyang, Mao Fangfang, Guo Xueyi*
        Abstract: The purpose of this study is to explore the adsorption performance of meso-2, 3-dimercaptosuccinic acid (DMSA) modified Fe3O4@SiO2 magnetic nanocomposite (Fe3O4@SiO2DMSA) for Pb2+ ions removal from aqueous solutions. The effects of solution pH, initial concentration of Pb2+ions, contact time, and temperature on the amount of Pb2+ adsorbed were investigated. Adsorption isotherms, adsorption kinetics, and thermodynamic analysis were also studied. The results showed that the maximum adsorption capacity of the Fe3O4@SiO2DMSA composite is 50.5 mg/g at 298 K, which is higher than that of Fe3O4 and Fe3O4@SiO2 magnetic nanoparticles. The adsorption process agreed well with Langmuir adsorption isotherm models and pseudo second-order kinetics. The thermodynamic analysis revealed that the adsorption was spontaneous, endothermic and energetically driven in nature.
        Keywords: lead removal; adsorption; Fe3O4@SiO2 core/shell structure; DMSA modification; magnetic nanocomposite