Use of Carboxyl Functional Magnetite Nanoparticles as Potential Sorbents for the Removal of Heavy Metal Ions from Aqueous Solution
Use of Carboxyl Functional Magnetite Nanoparticles as Potential Sorbents for the Removal of Heavy Metal Ions from Aqueous Solution
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DOI：
10.1021/je5011196
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发表时间：
2015-06
影响因子：
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通讯作者：
Ji Shi;Han-Ying Li;Hongguang Lu;Xiaowei Zhao
中科院分区：
文献类型：
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作者：
Ji Shi;Han-Ying Li;Hongguang Lu;Xiaowei Zhao
在这项工作中，开发了羧基功能化磁铁矿纳米颗粒 (CMNP)，用于吸附 Pb(II)、Cd(II) 和 Cu(II)。通过傅里叶变换红外光谱、粉末 X 射线衍射和透射电子显微镜对 CMNP 进行了表征。研究表明，吸附动力学遵循准二级动力学模型。实验平衡吸附数据与 Freundlich 模型吻合良好。 25 °C 时对 Pb(II)、Cd(II) 和 Cu(II) 的最大吸附容量分别可达 (74.63、45.66 和 44.84) mg g–1。热力学分析表明吸附是放热且自发的，并计算了热力学参数ΔG、ΔH和ΔS。此外，CMNPs还可用作可回收的吸附剂，用于吸附水溶液中的Pb(II)、Cd(II)和Cu(II)。
In this work, carboxyl functionalized magnetite nanoparticles (CMNPs) are developed for the adsorption of Pb(II), Cd(II), and Cu(II). The characterization of CMNPs was performed by Fourier transform infrared spectroscopy, powder X-ray diffraction, and transmission electron microscopy. Studies show that the adsorption kinetics are found to follow the pseudo-second-order kinetic model. The experimental equilibrium adsorption data are fitted well to the Freundlich model. The maximum adsorption capacity at 25 °C could reach up to (74.63, 45.66, and 44.84) mg g–1 for Pb(II), Cd(II), and Cu(II), respectively. Thermodynamic analyses show that the adsorption is exothermic and spontaneous, and thermodynamic parameters, ΔG, ΔH, and ΔS, are calculated. In addition, CMNPs can be used as the recyclable adsorbent for the adsorption of Pb(II), Cd(II), and Cu(II) from aqueous solutions.