Use of activated carbon as a reactive support to produce highly active-regenerable Fe-based reduction system for environmental remediation

被引：64

作者：

Pereira, Marcio C. ^{[1
]}

Coelho, Flavia S. ^{[1
]}

Nascentes, Clesia C. ^{[1
]}

Fabris, Jose D. ^{[1
]}

Araujo, Maria H. ^{[1
]}

Sapag, Karim ^{[2
]}

Oliveira, Luiz C. A. ^{[3
]}

Lago, Rochel M. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, ICEx, Dept Quim, BR-31270901 Belo Horizonte, MG, Brazil

[2] Univ Nacl San Luis, Dept Fis, San Luis, Argentina

[3] Univ Fed Lavras, Dept Quim, BR-37200000 Lavras, MG, Brazil

来源：

CHEMOSPHERE | 2010年 / 81卷 / 01期

关键词：

Iron oxides; Carbon; Heterogeneous Fenton; Cr(VI) reduction; POTENTIAL APPLICATION; OXIDES PARTICLES; CHROMIUM; IRON; REMOVAL; WATER; COMPOSITES; OXIDATION; WASTE;

D O I：

10.1016/j.chemosphere.2010.07.056

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Composites based on iron supported on high surface area activated carbon were prepared and characterized with Fe-57 Mossbauer spectroscopy, X-ray diffraction, saturation magnetization measurements and temperature-programmed reduction. Upon thermal treatment, the supported iron oxides react with carbon to yield reduced chemical species, i.e. Fe3O4 and Fe(0). This so produced composite was found to be highly efficient in two environmental applications: (i) degradation of textile dye and (ii) reduction of Cr(VI) in aqueous medium. Sequential reuses evidenced a progressive chemical deactivation of the composites due to a corresponding oxidation of the reactive species. Even after being virtually deactivated, the initial chemical reducing ability of the composites can be regenerated by heating at 800 degrees C under N-2 atmosphere, and then reused for several consecutive times. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：7 / 12

页数：6

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