Magnetic magnetite (Fe3O4) nanoparticle synthesis and applications for lead (Pb2+) and chromium (Cr6+) removal from water

被引：625

作者：

Rajput, Shalini ^{[1
]}

Pittman, Charles U., Jr. ^{[2
]}

Mohan, Dinesh ^{[1
]}

机构：

[1] Jawaharlal Nehru Univ, Sch Environm Sci, New Delhi 110067, India

[2] Mississippi State Univ, Dept Chem, Mississippi State, MS 39762 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2016年 / 468卷

关键词：

Adsorption; Co-precipitation method; Removal; magnetite nanoparticles; Wastewater treatment; lead and chromium removal; IRON-OXIDE NANOPARTICLES; HEAVY-METAL IONS; WASTE-WATER; HEXAVALENT CHROMIUM; AQUEOUS-SOLUTION; FAST PYROLYSIS; CONTAMINATED WATER; PARTICLE-SIZE; CU II; ADSORPTION;

D O I：

10.1016/j.jcis.2015.12.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Magnetic magnetite (Fe3O4) nanoparticles synthesized by chemical co-precipitation were characterized using XRD, TEM, SEM-EDX, FT-IR, ED-XRF, PPMS, point of zero charge (pH(pzc)) and surface area measurements. As-prepared Fe3O4 nanoparticles were successful for aqueous Cr6+ and Pb2+ removal. Batch adsorption experiments systematically investigated the influence of pH, temperature, contact time and adsorbate/adsorbent concentration on Cr6+ and Pb2+ adsorption. Maximum Cr6+ and Pb2+ removal occurred at pH 2.0 and 5.0, respectively. Sorption data fit pseudo-second order kinetics, indicating a chemical adsorption. The Freundlich, Langmuir, Redlich-Peterson, Toth, Radke and Sips adsorption isotherm models were applied to describe equilibrium data. The Sips and Langmuir models best described Cr6+ and Pb2+ adsorption on magnetite nanoparticles, respectively. The maximum Langmuir adsorption capacities were 34.87 (Cr6+ and 53.11 (Pb2+) mg/g at 45 degrees C, respectively. Fe3O4 nanoparticles are promising potential adsorbents and exhibited remarkable reusability for metal ions removal in water and wastewater treatment. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：334 / 346

页数：13

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