Chemical oxidation technologies: Ultraviolet light/hydrogen peroxide, Fenton's reagent, and titanium dioxide-assisted photocatalysis
- Argonne National Lab., IL (United States)
Chemical oxidation technologies are useful in the oxidative degradation or transformation of a wide range of pollutants for the treatment of drinking water, groundwater, wastewater, and contaminated soils. The application status and potential of three chemical oxidation treatment methods which generate powerful oxidants (hydroxyl radicals): ultraviolet light (uv)/hydrogen peroxide (H[sub 2]O[sub 2]) process, Fenton's reagent treatment, and titanium dioxide (TiO[sub 2])-assisted photocatalytic degradation, are described and discussed. These oxidation methods are known to effectively degrade and, in several cases, mineralize contaminants ranging from inorganic compounds (such as cyanides) to chlorinated aliphatic compounds and complex aromatic compounds in reaction times on the order of a few minutes to a few hours. Of the three oxidation systems discussed, the technology for the uv/H[sub 2]O[sub 2] process is the most advanced, with numerous successful full-scale treatment units already in existence. Applications of both the Fenton's reagent and TiO[sub 2]-assisted photodegradation processes are currently being developed, with the concepts proven in numerous laboratory-scale studies for a wide range of contaminants. However, both of these processes have only been studied at the pilot/field scale to a limited extent. The application of Fenton's reagent as a pretreatment step prior to biological treatment for industrial wastes and contaminated soils appears promising. Improved system configuration and quantum efficiency of photoreactors are likely to improve the economics of TiO[sub 2]-assisted photodegradation for groundwater treatment, especially with the use of solar illumination. 203 refs., 6 figs., 4 tabs.
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6284638
- Journal Information:
- Hazardous Waste and Hazardous Materials; (United States), Vol. 10:2; ISSN 0882-5696
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HAZARDOUS MATERIALS
WASTE PROCESSING
HYDROXYL RADICALS
PRODUCTION
POLLUTANTS
OXIDATION
WET OXIDATION PROCESSES
COMPARATIVE EVALUATIONS
CHEMICAL REACTION KINETICS
GROUND WATER
HYDROGEN PEROXIDE
IRON COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
POLYCYCLIC AROMATIC HYDROCARBONS
TITANIUM OXIDES
ULTRAVIOLET RADIATION
AROMATICS
CHALCOGENIDES
CHEMICAL REACTIONS
ELECTROMAGNETIC RADIATION
EVALUATION
HYDROCARBONS
HYDROGEN COMPOUNDS
KINETICS
MANAGEMENT
MATERIALS
ORGANIC HALOGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
PROCESSING
RADIATIONS
RADICALS
REACTION KINETICS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WATER
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
400201 - Chemical & Physicochemical Properties