Abstract
The day-to-day negative effect of contaminating substances on the NOxremoval effectiveness of photocatalytic surfaces and their recovery capacity after undergoing cleansing is of real academic and practical interest. This paper analyzes the NOxremoval effectiveness of two different types of photocatalytic concrete surface layers incorporating nano-TiO2particles. Both types of surfaces are examined before and after being subjected to dust accumulation and oil impregnation. The recovery of their NOxremoval capacity after undergoing various cleansing processes is also evaluated. The results are compared to those of their respective reference samples. The results show that the high NOxremoval capacity of the spray-coated samples is partially maintained even after a high concentration of dust accumulation. However, the water-cleansing process employed is sufficient to recover the lost NOxremoval capacity. It is also discovered that the nano-TiO2particles lose nearly all their photocatalytic capacity after being subjected to oil impregnation, and that the cleansing processes, either by an alkaline detergent or using an n-hexane solvent, fails to recover the initial NOxremoval capacity.
| Original language | English |
|---|---|
| Article number | 04017040 |
| Journal | Journal of Environmental Engineering (United States) |
| Volume | 143 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 Sept 2017 |
Keywords
- Concrete surface
- Dust accumulation
- Nano-TiO 2
- NO removal x
- Oil impregnation
- Photocatalytic
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Civil and Structural Engineering
- General Environmental Science