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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Toro C.A. Jobson B.T. Haselbach L. Shen S. y Chung S.H. Photoactive roadways: determination of CO NO and VOC uptake coefficients and photolabile side product yields on TiO2 treated asphalt and concrete. Elsevier, 2016. https://doi.org/10.1016/j.atmosenv.2016.05.007

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Resource type Text
Date of creation 2024-12-02
Date of last revision 2025-01-18
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Metadata identifier 05d55c72-575d-5495-bf99-125acfa916b7
Metadata language Spanish
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ISO 19115 topic category biota
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Name of the dataset creator Toro, C.A., Jobson, B.T., Haselbach, L., Shen, S. y Chung, S.H.
Name of the dataset editor Elsevier
Other identifier DOI: 10.1016/j.atmosenv.2016.05.007
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