Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 254, Issue -, Pages 277-283Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2013.03.009
Keywords
Electrolysis; C-Fe-0 composite; Chromium (VI); Water treatment
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Funding
- National High Technology Research and Development Program of China (863Program) [SS2012AA062403]
- Fundamental Research Funds for the Central Universities [2011YXL056]
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In this paper we prepared a novel material of activated carbon/nanoscale zero-valent iron (C-Fe-0) composite. The C-Fe-0 was proved to possess large specific surface area and outstanding reducibility that result in the rapid and stable reaction with Cr (VI). The prepared composite has been examined in detail in terms of the influence of solution pH, concentration and reaction time in the Cr (VI) removal experiments. The results showed that the C-Fe-0 formed a micro-electrolysis which dominated the reaction rate. The Micro-electrolysis reaches equilibrium is ten minutes. Its reaction rate is ten times higher than that of traditional adsorption reaction, and the removal rate of Cr reaches up to 99.5%. By analyzing the obtained profiles from the cyclic voltammetry, PXRD and XPS, we demonstrate that the Cr (VI) is reduced to insoluble Cr (III) compound in the reaction. (c) 2013 Elsevier B.V. All rights reserved.
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