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), Journal Name: Hazardous Waste and Hazardous Materials; (United States) Vol. 10:2; ISSN 0882-5696; ISSN HWHME2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201 -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
AROMATICS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
ELECTROMAGNETIC RADIATION
EVALUATION
GROUND WATER
HAZARDOUS MATERIALS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXYL RADICALS
IRON COMPOUNDS
KINETICS
MANAGEMENT
MATERIALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
PHOTOCHEMICAL REACTIONS
POLLUTANTS
POLYCYCLIC AROMATIC HYDROCARBONS
PROCESSING
PRODUCTION
RADIATIONS
RADICALS
REACTION KINETICS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET RADIATION
WASTE MANAGEMENT
WASTE PROCESSING
WATER
WET OXIDATION PROCESSES