Absorption performance of DMSA modified Fe3O4@SiO2 core/shell magnetic nanocomposite for Pb2+ removal

被引：17

作者：

Tian Qing-hua ^{[1
]}

Wang Xiao-yang ^{[1
]}

Mao Fang-fang ^{[1
]}

Guo Xue-yi ^{[1
]}

机构：

[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2018年 / 25卷 / 04期

关键词：

lead removal; adsorption; Fe3O4@SiO2 core/shell structure; DMSA modification; magnetic nanocomposite; HEAVY-METAL IONS; AQUEOUS-SOLUTION; WASTE-WATER; ENVIRONMENTAL-SAMPLES; IMPRINTED POLYMER; SELECTIVE REMOVAL; NANOPARTICLES; ADSORPTION; PB(II); SURFACE;

D O I：

10.1007/s11771-018-3775-y

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The purpose of this study is to explore the adsorption performance of meso-2, 3-dimercaptosuccinic acid (DMSA) modified Fe3O4@SiO2 magnetic nanocomposite (Fe3O4@SiO(2)DMSA) 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@SiO(2)DMSA 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.

引用

页码：709 / 718

页数：10

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