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This article in SSSAJ

  1. Vol. 47 No. 5, p. 922-927
     
    Received: Aug 3, 1982
    Published: Sept, 1983


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doi:10.2136/sssaj1983.03615995004700050016x

Peroxy Radical Interactions with Soil Constituents1

  1. A. A. Pohlman and
  2. T. Mill2

Abstract

Abstract

Interaction of peroxy (RO2·) radicals with soil constituents in dilute aqueous solutions and suspensions at 50°C was examined using p-isopropylphenol (PIP) as a probe. Dissolved and suspended humic substances as well as suspended silicate surfaces were found to trap RO2· radicals. Competitive trapping of RO2· radicals occurs with 10 mg·L−1 of solid suspended humic acid polymers and by 1.0% silicate suspensions containing 3–74 mg·kg−1 of total organic C. Electron and H-atom transfer between RO2· radicals and solid surfaces is attributed to the availability of electron-donating or phenolic functional groups and not to total organic C content.

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