Nitrogen oxide reduction and nitrate measurements on TiO 2 photocatalytic pervious concrete pavement

Marwa Hassan, Somayeh Asadi, John T. Kevern, Tyson Rupnow

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Photocatalytic compounds such as titanium dioxide (TiO 2) can be used to construct pervious concrete pavements that can trap and degrade organic and inorganic particles in the air. Photocatalytic pervious pavements transform harmful pollutants such as nitrogen oxides (NO x) into nitrates salts when subjected to UV light from the sun purifying ambient air from vehicle emissions. In spite of these benefits, an increase in nitrate levels may cause eutrophication. The objective of this study is to evaluate the amount of nitrates released due to pervious photocatalytic concrete and to assess potential eutrophication issues. To achieve this objective, pervious concrete samples were tested in the laboratory for photocatalytic NO x reduction efficiency according to JIS standard. The test was performed using an innovative lab setup and conducted under different environmental and operational conditions including flow rate, UV intensity, temperature, and relative humidity. After testing, samples were washed with deionized water (DI) to collect the nitrates deposited on the surface. The concentration of nitrates collected was measured using a colorimetric method known as cadmium reduction. Results showed that photocatalytic pervious concrete is capable of purifying ambient air from NO x. Results also showed that the concentrations of nitrate deposited on the surface are low and will not cause eutrophication problems.

Original languageEnglish (US)
Title of host publicationConstruction Research Congress 2012
Subtitle of host publicationConstruction Challenges in a Flat World, Proceedings of the 2012 Construction Research Congress
Pages1920-1930
Number of pages11
DOIs
StatePublished - Sep 19 2012
EventConstruction Research Congress 2012: Construction Challenges in a Flat World - West Lafayette, IN, United States
Duration: May 21 2012May 23 2012

Publication series

NameConstruction Research Congress 2012: Construction Challenges in a Flat World, Proceedings of the 2012 Construction Research Congress

Other

OtherConstruction Research Congress 2012: Construction Challenges in a Flat World
CountryUnited States
CityWest Lafayette, IN
Period5/21/125/23/12

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All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

Cite this

Hassan, M., Asadi, S., Kevern, J. T., & Rupnow, T. (2012). Nitrogen oxide reduction and nitrate measurements on TiO 2 photocatalytic pervious concrete pavement. In Construction Research Congress 2012: Construction Challenges in a Flat World, Proceedings of the 2012 Construction Research Congress (pp. 1920-1930). (Construction Research Congress 2012: Construction Challenges in a Flat World, Proceedings of the 2012 Construction Research Congress). https://doi.org/10.1061/9780784412329.193