Arsenic (V) adsorption on Fe3O4 nanoparticle-coated boron nitride nanotubes

被引：162

作者：

Chen, Rongzhi ^{[1
,2
]}

Zhi, Chunyi ^{[1
]}

Yang, Huang ^{[1
]}

Bando, Yoshio ^{[1
]}

Zhang, Zhenya ^{[2
]}

Sugiur, Norio ^{[1
]}

Golberg, Dmitri ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan

[2] Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2011年 / 359卷 / 01期

关键词：

Arsenic adsorption; Boron nitride nanotube; Functionalization; Nanoparticle; Nanostructure; ZERO-VALENT IRON; AQUEOUS-SOLUTION; EXAFS SPECTROSCOPY; CARBON NANOTUBES; DRINKING-WATER; REMOVAL; AS(V); COMPLEXES; NANOCRYSTALS; GOETHITE;

D O I：

10.1016/j.jcis.2011.02.071

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Multiwalled boron nitride nanotubes (BNNTs) functionalized with Fe3O4 nanoparticles (NPs) were used for arsenic removal from water solutions. Sonication followed by a heating process was developed to in situ functionalize Fe3O4 NPs onto a tube surface. A batch of adsorption experiments conducted at neutral pH (6.9) and room temperature (25 degrees C) and using the developed nanocomposites revealed effective arsenic (V) removal. The Langmuir, Freundlich, and Dubinin-Radushkevich adsorption isotherms were measured for a range of As(V) initial concentrations from 1 to 40 mg/L under the same conditions. The equilibrium data well fitted all isotherms, indicating that the mechanism for As(V) adsorption was a combination of chemical complexation and physical electrostatic attraction with a slight preference for chemisorption. The magnetite NPs functionalized on BNNTs led to a simple and rapid separation of magnetic metal-loaded adsorbents from the treated water under an external magnetic field. (c) 2011 Elsevier Inc. All rights reserved.

引用

页码：261 / 268

页数：8

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