Rapid destruction of organic chemicals in groundwater using sunlight

Conference · Sun Jan 01 00:00:00 EST 1989

OSTI ID:6469502

Tyner, C E; Haslund, C A; Pacheco, J E; Holmes, J T

We are currently investigating a solar-driven photocatalytic process that promises to destroy low concentrations of hazardous organic molecules in large volumes of contaminated groundwater or industrial waste streams. Preliminary results of laboratory-scale screening tests using a model compound, salicylic acid, and titanium dioxide catalyst have shown that no measurable reaction occurs without both uv light and catalyst; no measurable volatilization of the salicylic acid occurs at room temperature; salicylic acid destruction rates depend on catalyst supplier and concentration and on uv light intensity; and some intermediates are being formed and subsequently destroyed. Observed reaction rates are consistent with those observed in an initial pilot-scale solar test of a falling-film reactor, although further testing will be required to quantify the comparison. 10 refs., 5 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6469502
• Report Number(s): SAND-89-0236C; CONF-890363-1; ON: DE89006766
• Resource Relation: Conference: Hazardous materials management conference, Rosemont, IL, USA, 14 Mar 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
GROUND WATER
CONTAMINATION
ORGANIC COMPOUNDS
DETOXIFICATION
REMOVAL
PHOTOCHEMICAL REACTIONS
CATALYTIC EFFECTS
SALICYLIC ACID
SOLAR RADIATION
TIME DEPENDENCE
TITANIUM OXIDES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
HYDROGEN COMPOUNDS
HYDROXY ACIDS
ORGANIC ACIDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
STELLAR RADIATION
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WATER
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)