Halide salts accelerate degradation of high explosives by zerovalent iron

Jong Sung Kim; Patrick J Shea; Jae E Yang; Jang-Eok Kim

doi:10.1016/j.envpol.2006.10.010

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Halide salts accelerate degradation of high explosives by zerovalent iron

Journal article

Peer reviewed

Halide salts accelerate degradation of high explosives by zerovalent iron

Jong Sung Kim, Patrick J Shea, Jae E Yang and Jang-Eok Kim

Environmental pollution (1987), Vol.147(3), pp.634-641

2007

DOI: 10.1016/j.envpol.2006.10.010

PMID: 17241724

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Abstract

Zerovalent iron (Fe 0, ZVI) has drawn great interest as an inexpensive and effective material to promote the degradation of environmental contaminants. A focus of ZVI research is to increase degradation kinetics and overcome passivation for long-term remediation. Halide ions promote corrosion, which can increase and sustain ZVI reactivity. Adding chloride or bromide salts with Fe 0 (1% w/v) greatly enhanced TNT, RDX, and HMX degradation rates in aqueous solution. Adding Cl or Br salts after 24 h also restored ZVI reactivity, resulting in complete degradation within 8 h. These observations may be attributed to removal of the passivating oxide layer and pitting corrosion of the iron. While the relative increase in degradation rate by Cl − and Br − was similar, TNT degraded faster than RDX and HMX. HMX was most difficult to remove using ZVI alone but ZVI remained effective after five HMX reseeding cycles when Br − was present in solution. The addition of halide ions promotes the degradation of high explosives by zerovalent iron.

Halide ion

High explosives (HE)

Passivation

Reactivity

Zerovalent iron (ZVI)

Details

Title: Subtitle: Halide salts accelerate degradation of high explosives by zerovalent iron
Creators: Jong Sung Kim - Center for Environmental Toxicology and School of Natural Resources, University of Nebraska-Lincoln, 362 Plant Sciences, Lincoln, NE 68583, USA
Patrick J Shea - Center for Environmental Toxicology and School of Natural Resources, University of Nebraska-Lincoln, 362 Plant Sciences, Lincoln, NE 68583, USA
Jae E Yang - Department of Biological Environment, Kangwon National University, Chunchon 210-702, Korea
Jang-Eok Kim - Division of Applied Biology and Chemistry, Kyungpook National University, Daegu 702-701, Korea
Resource Type: Journal article
Publication Details: Environmental pollution (1987), Vol.147(3), pp.634-641
Publisher: Elsevier Ltd
DOI: 10.1016/j.envpol.2006.10.010
PMID: 17241724
ISSN: 0269-7491
eISSN: 1873-6424
Language: English
Date published: 2007
Academic Unit: Occupational and Environmental Health
Record Identifier: 9984214939802771

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