Journal article
Hydrogen peroxide decomposition in model subsurface systems
Journal of hazardous materials, Vol.69(2), pp.229-243
1999
Handle:
https://hdl.handle.net/2376/105203
PMID: 10536288
Abstract
Rates of hydrogen peroxide decomposition, hydroxyl radical production, and oxygen evolution were investigated in silica sand–goethite slurries using unstabilized and stabilized hydrogen peroxide formulations. The goethite-catalyzed decomposition of unstabilized hydrogen peroxide formulations resulted in more rapid hydrogen peroxide loss and oxygen evolution relative to systems containing a highly stabilized hydrogen peroxide formulation. Systems at neutral pH and those containing higher goethite concentrations were characterized by higher rates of hydrogen peroxide decomposition and by more oxygen evolution. The stabilized hydrogen peroxide formulation showed greater hydroxyl radical production relative to the unstabilized formulations. Furthermore, hydroxyl radical production rates were greater at neutral pH than at the acidic pH regimes. The results suggest that when stabilized hydrogen peroxide is injected into the subsurface during in situ bioremediation, naturally occurring minerals such as goethite may initiate Fenton-like reactions. While these reactions may prove to be toxic to microorganisms, they have the potential to chemically oxidize contaminants in soils and groundwater.
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Details
- Title
- Hydrogen peroxide decomposition in model subsurface systems
- Creators
- Richard J Watts - Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USAMichael K Foget - Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USASung-Ho Kong - Department of Chemical Engineering, Hanyang University, Seoul, South KoreaAmy L Teel - Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USA
- Publication Details
- Journal of hazardous materials, Vol.69(2), pp.229-243
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Elsevier B.V
- Identifiers
- 99900546904501842
- Language
- English
- Resource Type
- Journal article