Size-dependent of chromium (VI) adsorption on nano α-Fe2O3 surface

被引：38

作者：

Xiao, Qing ^{[1
]}

Sun, Ying ^{[1
]}

Zhang, Jing ^{[1
]}

Li, Qiuju ^{[1
]}

机构：

[1] Shanghai Univ, State Key Lab Adv Special Steels, Shanghai 200072, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2015年 / 356卷

关键词：

Nano hematite; Adsorption; Size dependence; LOW-COST ADSORBENTS; AQUEOUS-SOLUTIONS; WASTE-WATER; REMOVAL; HEMATITE; CR(VI); METAL; IRON; NANOPARTICLES; CHEMISTRY;

D O I：

10.1016/j.apsusc.2015.08.005

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：

Cr (VI), which had a strong oxidation ability and migration capability, was one of the major metal pollutants in the water resources. Hematite nanoparticles, which acted as a kind of environmental repair material, could be used to deal with the metal ions contamination. In this paper, four different sizes of nanoparticles hematite were synthesized by sol-gel method and the samples were characterized by XRD, SEM, etc. The adsorption effect and structure were studied, respectively, by ICP and infrared spectrum. The mechanism of Cr (VI) adsorption on the surface of nano hematite was also discussed. We found that Cr (VI) adsorption on hematite in water has size dependence. Cr (VI) was most likely bound to the sites of water adsorption on the surface of hematite, and as a result, forming complex structure with the surface of hydroxylation hematite. Cr (VI) may be also directly adsorbed on the surface of hematite replacing the binding sites of OH. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：18 / 23

页数：6

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