Photoactive roadways: determination of CO, NO and VOC uptake coefficients and photolabile side product yields on TiO2 treated asphalt and concrete.

This work reports uptake coefficients and by-product yields of ozone precursors onto two photocatalytic paving materials (asphalt and concrete) treated with a commercial TiO2 surface application product. The experimental approach used a continuously stirred tank reactor (CSTR) and allowed for testing large samples with the same surface morphology encountered with real urban surfaces. The measured uptake coefficient (γgeo) and surface resistances are useful for parametrizing dry deposition velocities in air quality model evaluation of the impact of photoactive surfaces on urban air chemistry. At 46% relative humidity, the surface resistance to NO uptake was ∼1 s cm−1 for concrete and ∼2 s cm−1 for a freshly coated older roadway asphalt sample. HONO and NO2 were detected as side products from NO uptake to asphalt, with NO2 molar yields on the order of 20% and HONO molar yields ranging between 14 …

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Date of creation 2024-09-17
Date of last revision 2024-09-17
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Metadata identifier 73ddb3ad-80b8-5be1-a415-206f1906114f
Metadata language Spanish
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ISO 19115 topic category biota
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INSPIRE identifier ESPMITECOIEPNBFRAGM504
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"{\"type\": \"Polygon\", \"coordinates\": [[[-18.16, 27.64], [4.32, 27.64], [4.32, 43.79], [-18.16, 43.79], [-18.16, 27.64]]]}"
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  1. Atmospheric environment. Vol. 139
  2. pags. 37-45
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Name of the dataset creator Toro, C.A., Jobson, B.T., Haselbach, L., Shen, S. y Chung, S.H.
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