Reductive Dechlorination

Reductive Dechlorination2019-08-11T16:13:37+00:00

Reductive Dechlorination

Reductive dechlorination  is often times a slower process than chemical oxidation, however in some cases it is a more cost-effective alternative when rapid site closure is not required.  ORIN utilizes two primary reductive dechlorination strategies, biological treatment and iron based reactions.   Biological treatment is achieved using anaerobic conditions in which cell growth is stimulated and contaminants function in metabolic pathways.  Electron transfer facilitates removal of the chloride molecule and the remaining non-chlorinated compound is consumed by microorganisms present in the soil.   Iron based reactions center around the use of zero valent iron in which hydrogen generated with treatment chemistries facilitates electron transfer more rapidly, replacing chloride molecules on the contaminant and allowing normally occurring microorganisms to degrade the remaining non-chlorinated compound.

ORIN has experienced great success with both biological and iron based dechlorination strategies used in tandem.  ORIN utilizes a proprietary blend of water-soluble carbon and suspended zero valent iron.  This provides the benefit of immediate reductive conditions to facilitate electron transfer coupled with long-term anaerobic activity provided by the additional carbon food source.

Treatable Contaminants

  • Chlorinated Solvents

  • Some Chlorinated Aromatics

  • Nitroaromatics

  • Inorganics (e.g. Nitrate and Perchlorate)

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