Effect of weathering and traffic exposure on removal of nitrogen oxides by photocatalytic coatings on roadside concrete structures

Autor: Neil E. Crain, Alexandra L. Terpeluk, Lisa E. Burris, Maria C.G. Juenger, Richard L. Corsi, Clement Cros
Rok vydání: 2014
Předmět:
Zdroj: Materials and Structures. 48:3159-3171
ISSN: 1871-6873
1359-5997
Popis: Oxides of nitrogen (NO x ) are ubiquitous pollutants in large urban areas of the world. Photocatalytic materials have been studied, primarily in the laboratory, for their ability to remove oxides of nitrogen. The study described herein compared NO x removal efficacies of three commercially-available photocatalytic coatings (a stucco, a white paint and a clear paint) applied to roadside concrete. The study aimed to elucidate how environmental parameters and exposure to real roadside conditions impact NO x removal. This was achieved through periodic laboratory chamber testing and material characterization of concrete slabs stored by busy roadways for a 20-month period. It was observed that roadside exposure led to physical degradation of the clear paint coating, while the other two remained intact. The stucco coating was the most effective at NO x removal, but the efficacy nonetheless diminished over time.
Databáze: OpenAIRE