High efficient removal of Pb (II) by amino-functionalized Fe3O4 magnetic nano-particles
High efficient removal of Pb (II) by amino-functionalized Fe3O4 magnetic nano-particles
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氨基功能化 Fe3O4 磁性纳米粒子高效去除 Pb(II)
DOI：
10.1016/j.cej.2012.02.075
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发表时间：
2012-05-15
影响因子：
15.1
通讯作者：
Hao, Yongmei
中科院分区：
文献类型：
--
作者：
Tan, Yanqing;Chen, Man;Hao, Yongmei
通过简单的一锅法制备了氨基功能化磁性纳米吸附剂（MNPs-NH2），用于去除 Pb（II）。这些氨基功能化的 Fe3O4 纳米颗粒对水介质中的 Pb (II) 显示出高吸附容量和有效吸附。对Pb(II)离子吸附的研究表明，该过程遵循准二级动力学模型，决定步骤可能是化学吸附。在各种等温线模型中，Pb(II)的吸附实验数据遵循Langmuir等温线，在pH 5和298 K时最大吸附容量为40.10 mg g(-1)。Dubinin-Radushkevich等温线的吸附平均自由能为10.31 kJ mol(-1)，表明是化学吸附。此外，Pb(II)离子可以从纳米吸附剂中解吸，MNPs-NH2表现出良好的可重复使用性。重要的是，MNPs-NH2 可以从工业废水和自来水中去除约 98% 的 Pb (II)。 (C) 2012 Elsevier B.V. 保留所有权利。
An amino-functionalized magnetic nano-adsorbent (MNPs-NH2) has been prepared by a simple one-pot method for the removal of Pb (II). These amino-functionalized Fe3O4 nano-particles showed a high adsorption capacity and efficient adsorption toward Pb (II) in an aqueous medium. The studies on the adsorption of Pb (II) ions revealed that the process obey the pseudo-second order kinetic model, the determining step might be chemical sorption. Among the various isotherm models, the experimental data for the adsorption of Pb (II) were found to follow the Langmuir isotherm and the maximum adsorption capacity was 40.10 mg g(-1) at pH 5 and 298 K. The sorption mean free energy from the Dubinin-Radushkevich isotherm was found to be 10.31 kJ mol(-1), indicating a chemical sorption. In addition, Pb (II) ions could be desorbed from nano-adsorbents and the MNPs-NH2 exhibited a good reusability. Importantly, about 98% of Pb (II) could be removed by MNPs-NH2 from industrial wastewater and tap water. (C) 2012 Elsevier B.V. All rights reserved.