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ISCO Technology Overview: Do You Really Understand the Chemistry?

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Contaminated Soils, Sediments and Water

Abstract

The reaction chemistry of ISCO is presented for the common oxidant systems employed in ISCO: catalyzed peroxide propagations (Modified Fenton’s), persulfate, ozone/ozone-peroxide (peroxone), and permanganate. All of these oxidant systems, with the exception of permanganate are described by reaction schemes employing free radical generation, and all are dependent to some degree on local conditions such as water chemistry and pH. A less familiar reactant condition may be the influence of inorganic and organic compounds in the soil matrix, which can have a strong influence over the intended outcome of the ISCO application. Thus, naturally occurring organic compounds may overwhelm the contaminant demand for oxidant or prevent the transition of the adsorbed contaminant to the aqueous phase where ISCO reactions occur. Naturally occurring inorganic compounds may actu ally cause destruction of the oxidant or modify the catalytic component. Some experience with soils having markedly different matrix properties are discussed to provide an illustration of some of the difficulties which may be faced in the practice of ISCO.

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Edward J. Calabrese Paul T. Kostecki James Dragun

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Osgerby, I.T. (2006). ISCO Technology Overview: Do You Really Understand the Chemistry?. In: Calabrese, E.J., Kostecki, P.T., Dragun, J. (eds) Contaminated Soils, Sediments and Water., vol 10. Springer, Boston, MA. https://doi.org/10.1007/0-387-28324-2_19

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