Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 164, Issue 1, Pages 394-395Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2008.08.004
Keywords
Adsorption; Bimetallic system; Co-precipitation; Zerovalent iron; Reduction
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This letter challenges the concept that Fe-0/Me-0 bimetallic systems enhance contaminant reduction on Me-0 surfaces. It is shown on a pure thermodynamic perspective that any enhancement of contaminant reduction by Fe-0 in the presence of a second more electropositive elemental metal (Me-0) is the result of an indirect process resulting from iron corrosion. This demonstration validates the concept that aqueous contaminant removal in the presence of Fe-0 mostly occurs within an in situ generated oxide film on Fe-0. (C) 2008 Elsevier B.V. All rights reserved.
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