4.7 Article

Purification effect on runoff pollution of porous concrete with nano-TiO2 photocatalytic coating

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.trd.2021.103101

关键词

Stormwater runoff purification; Porous concrete; Nano-titanium dioxide; Photocatalysis; Coating

资金

  1. National Key Research and Development Program of China [2018YFB1600100]
  2. Fundamental Research Funds for the Central Universities [22120210027]

向作者/读者索取更多资源

This paper developed a photocatalytic water purification pavement coated with nano-TiO2 to improve the water purification performance of porous concrete. The study evaluated the removal rates of three typical pollutants and also examined the skid resistance and durability of the purification effect. Results showed that nano-TiO2 could significantly enhance the removal rates of COD, TP, and NH3-N on roads.
With the rapid development of cities, more attention has been paid to the stormwater runoff pollution on roads. In this paper, a kind of photocatalytic water purification pavement coated with nano-TiO2 was developed, which could improve the water purification performance of porous concrete. Through removal rate analysis of three typical pollutants, the improvement of its water purification performance was evaluated. The skid resistance of road surface and durability of purification effect were also studied by using pendulum apparatus and artificial accelerated aging method. The results showed that the removal rates of COD, TP and NH3-N could reach 50%, 60% and 40%, respectively. The application of photocatalytic coating would reduce skid resistance of pavement relatively. Besides, appropriate increase of nano-TiO2 content will improve the weather resistance. This study will provide useful insights for the preparation of nano-TiO2 photocatalytic coatings for porous cement concrete to improve the water purification effect of roads.

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