Record Display for the EPA National Library Catalog


Main Title Laser induced photochemical oxidative destruction of toxic organics in leachates and groundwaters.
CORP Author Environmental Protection Agency, Washington, DC.
Publisher Risk Reduction Engineering Laboratory,
Year Published 1993
Report Number EPA/540-SR-92-080
Stock Number PB2005-110575
OCLC Number 28162718
Subjects Groundwater--Purification--Ultraviolet radiation ; Groundwater--Purification--Oxidation ; Water--Purification--Organic compounds removal ; Laser photochemistry ; Leaching ; Organic compounds--Oxidation ; Water, Underground--Purification--Ultraviolet radiation ; Water, Underground--Purification--Oxidation
Additional Subjects Water pollution control ; Organic compounds ; Oxidation ; Photochemical reactions ; Technology utilization ; Hydrogen peroxide ; Toxic substances ; Ground water ; Ultraviolet radiation ; Degradation ; Leaching ; Waste disposal ; Hazardous materials ; Chemical reactions ; Superfund Innovative Technology Evaluation Program ; Laser induced reactions
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  TD460.L37 1993 Region 1 Library/Boston,MA 04/29/2016
EJBD ARCHIVE EPA 540-SR-92-080 In Binder Headquarters Library/Washington,DC 04/18/2017
EJBD  EPA 540-SR-92-080 c.1 Headquarters Library/Washington,DC 06/02/2014
ELBD  EPA 540-SR-92-080 AWBERC Library/Cincinnati,OH 09/12/1998
EMBD  EPA/540/SR-92/080 3 copies NRMRL/GWERD Library/Ada,OK 12/28/2001
NTIS  PB2005-110575 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 5 pages : illustrations ; 28 cm.
Energy and Environmental Engineering, Inc., East Cambridge Massachusetts, developed a photochemical treatment process that oxidizes organic compounds in wastewater. The process features an Excimer laser, which produces energy sufficient to fragment the bonds of the organic contaminants without altering the water molecules. The developer envisions the process as a final treatment step and claims applicability to groundwater and industrial wastewater containing organics, such as halogenated aliphatics, substitued aromatics, and organic acids. Contaminated wastewater is pumped through a filter unit to remove suspended particles. The filtrate is mixed with stoichiometric quantities of hydrogen peroxide. This mixture is fed to the photochemical reactor and irradiated. Energy from the laser is absorbed by the organic compound(s) and the oxidant, making both species reactive. The reactor effluent is directed to a vented storage tank, where the carbon dioxide product is vented. Base may be added to the storage tank to neutralize any acids formed. Reaction products are carbon dioxide, water, and the appropriate halogen acid. Reaction kinetics depend on contaminant concentration, peroxide concentration, irradiation dose, and irradiation frequency. Studies of the process used the existing bench-scale system, which treats solutions containing up to approximately 100 ppm of total organic carbon at a rate of 1 gallon per minute. Destruction efficiencies between 88% and 99% have been obtained for benzene, benzidine, chlorobenzene, chlorophenol, phenol, and dichloroethene. Preliminary cost evaluation shows that the process is competitive compared to other UV oxidation processes and carbon adsorption.
At head of title: SITE : Superfund Innovative Technology Evaluation. At head of title: Emerging technology summary. "February 1993." "EPA/540-SR-92-080."