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Title: BENCH-SCALE TESTS OF DRY PHOTOCATALYTIC DEGRADATION OF TWO NONPOINT RUNOFF MODEL COMPOUNDS
Accession Number: 00743658
Record Type: Component
Record URL: Availability: Find a library where document is available Abstract: The destruction of two model petroleum hydrocarbons using a photocatalyst fixed on dry test surfaces was investigated as a basis for minimizing nonpoint hydrocarbon runoff to adjacent soils and receiving waters. The process is based on attaching photochemically active titanium dioxide (TiO2) to pavement surfaces. Hexadecane and anthracene were used as model contaminants because they are common hydrocarbon constituents of gasoline, diesel, and motor oil. Six materials containing TiO2 were evaluated for photocatalytic activity; concrete sealant and paint base were found to be the most effective materials tested. The TiO2-sealant formulations were effective in promoting the degradation of hexadecane, providing more than 99% removal in 48 hr. Although the TiO2-paint base formulation was less effective than the TiO2 sealant, 98.2% degradation of hexadecane occurred on a 50% TiO2-paint base surface in 72 hr. Anthracene degradation was not accelerated from the addition of the photocatalyst into the surface. On the basis of the capability of dry fixed TiO2 to enhance rates of hexadecane photolysis, a full-scale demonstration project has been initiated to evaluate the in situ destruction of nonpoint highway runoff.
Supplemental Notes: This paper appears in Transportation Research Record No. 1601, Environmental Issues in Transportation.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Jones, A PWatts, R JSchaftlein, S MMolash, EPagination: p. 88-94
Publication Date: 1997
Serial: ISBN: 030906211X
Features: Figures
(8)
; References
(22)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Hydraulics and Hydrology
Files: TRIS, TRB, ATRI
Created Date: Dec 16 1997 12:00AM
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