Utilization of ferric ammonium citrate for in situ remediation of chlorinated solvents
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United States of America Patent
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Jul 1, 2014
Grant Date -
Jan 30, 2014
app pub date -
Jul 25, 2012
filing date -
Jul 25, 2012
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Abstract
Accelerated dechlorination of soil and water contaminated with chlorinated solvents in situ is achieved by delivering ferric ammonium citrate into the soils and/or water. The induction of ferric ammonium citrate into sulfate-rich reducing conditions initiates a combined abiotic and biotic mechanism for the dechlorination of subsurface contaminants. Initial and rapid removal of chlorinated solvents is achieved by way of reductive transformation, a mechanism utilizing the creation of an iron-bound soil mineral (pyrite) followed by stimulating conditions for enhanced biological natural attenuation.
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