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Reduction of RDX in Ground Water by Bio-Regenerated Iron Mineral: Results of Field Verification Test at a Miliary Shooting Range
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 Title & Authors
Reduction of RDX in Ground Water by Bio-Regenerated Iron Mineral: Results of Field Verification Test at a Miliary Shooting Range
Gong, Hyo-young; Lee, Kwang-pyo; Lee, Jong-yeol; Kyung, Daeseung; Lee, Woojin; Bae, Bumhan;
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This study investigates the in-situ implementation of bio-regenerated iron mineral catalyst to remove explosive compounds in ground water at a military shooting range in operation. A bio-regenerated iron mineral catalyst was synthesized using lepidocrocite (iron-bearing soil mineral), iron-reducing bacteria Shewanella putrefaciens CN32, and electron mediator (riboflavin) in the culture medium. This catalyst was then injected periodically in the ground to build a redox active zone acting like permeable reactive barrier through injection wells constructed at a live fire military shooting range. Ground water and core soils were sampled periodically for analysis of explosive compounds, mainly RDX and its metabolites, along with toxicity analysis and REDOX potential measurement. Results suggested that a redox active zone was formed in the subsurface in which contaminated ground water flows through. Concentration of RDX as well as toxicity (% inhibition) of ground water decreased in the downstream compared to those in the upstream while concentration of RDX reduction products increased in the downstream.
Electron transfer mediator;Iron reducing bacteria;Lepidocrocite;RDX;TNX;
 Cited by
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