Influence of dust and oil accumulation on effectiveness of photocatalytic concrete surfaces

Miren Etxeberria, Ming Zhi Guo, Anibal Maury-Ramirez, Chi Sun Poon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

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 languageEnglish
Article number04017040
JournalJournal of Environmental Engineering (United States)
Volume143
Issue number9
DOIs
Publication statusPublished - 1 Sep 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
  • Environmental Science(all)

Cite this