Photocatalytic oxidation of pesticides by solar-irradiated TiO[sub 2] systems

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:6900592

Sullivan, J M; Grinstead, Jr, J H

Research at the Tennessee Valley Authority's National Fertilizer and Environmental Research Center has been directed toward the development of passive basin type solar evaporators as a simple means of reducing the volume of fertilizer and pesticide contaminated rinsewater generated at fertilizer and agrichemical dealerships. In conjunction with this work, investigations are also devoted to TiO[sub 2] catalyzed solar photooxidation as a potential procedure for destroying pesticides in dilute aqueous systems. Initial tests in which dilute samples of the herbicides; Bicep (atrazine and metolachlor), Lasso (alachlor), and Sencor (metribuzin); were recirculated continuously over TiO[sub 2] impregnated fiberglass gauze, under solar irradiation, gave promising results. In the case of metribuzin, solar irradiation induced oxidation appeared effective at concentrations as high as 600 ppM. Catalytic efficiency did not appear greatly affected by using tap water rather than distilled water to dilute the pesticides. Two solar reactor designs will be discussed.

• Research Organization: National Fertilizer and Environmental Research Center, Muscle Shoals, AL (United States)
• Sponsoring Organization: TVA; Tennessee Valley Authority, Knoxville, TN (United States)
• OSTI ID: 6900592
• Report Number(s): TVA-Bull-Z-318; CONF-920815-12; ON: DE93003908
• Resource Relation: Conference: 204. American Chemical Society (ACS) national meeting, Washington, DC (United States), 23-28 Aug 1992
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
HERBICIDES
OXIDATION
PESTICIDES
WASTE WATER
WATER TREATMENT
EVAPORATORS
FERTILIZERS
MITIGATION
TENNESSEE VALLEY AUTHORITY
TITANIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
HYDROGEN COMPOUNDS
LIQUID WASTES
NATIONAL ORGANIZATIONS
OXIDES
OXYGEN COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
US ORGANIZATIONS
WASTES
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)