Record Display for the EPA National Library Catalog

RECORD NUMBER: 464 OF 680

OLS Field Name OLS Field Data
Main Title Novel and Simple Approach to Elimination of Dilute Toxic Wastes Based on Photoelectrochemical Systems.
Author Cooper, G. ; Nozik, A. J. ;
CORP Author Solar Energy Research Inst., Golden, CO.;Environmental Protection Agency, Cincinnati, OH. Hazardous Waste Engineering Research Lab.
Publisher Feb 89
Year Published 1989
Report Number EPA-CR-813055-010; EPA/600/2-89/007;
Stock Number PB89-161855
Additional Subjects Hazardous materials ; Water pollution control ; Photochemical reactions ; Photoelectricity ; Solvents ; Industrial wastes ; Ground water ; Surface water ; Laboratory equipment ; Performance evaluation ; Decomposition ; Reaction kinetics ; pH ; Liquid waste disposal ; Ethylene/trichloro ; Land pollution ; Land disposal ; Environmental transport
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB89-161855 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/08/1989
Collation 31p
Abstract
This work investigated several basic parameters, important for extending photocatalytic purification of water contaminated with trichloroethylene (TCE), from the laboratory to the field. Some of these variables strongly influence the decomposition kinetics of the TCE. Parameters investigated were the effect of solution pH, initial TCE concentration, presence of naturally occurring ions, temperature and presence of 'color bodies.' It was found that the photocatalytic decomposition of aqueous TCE occurs more than twice as fast in the pH range 6.4 to 9 than in the range 3.4 to 5. Additionally, various photocatalyst materials were also tested but titanium dioxide exhibited superior activity in decomposing TCE. In this laboratory study low intensity irradiation having the equivalent intensity of 1/4 to 1/5 Solar at AM1 was employed in order to exemplify the feasibility of large scale water purification utilizing natural solar light.