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 |
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| Rok vydání: | 2014 |
| Předmět: |
Pollutant
Materials science Environmental engineering Weathering Building and Construction engineering.material Laboratory chamber Coating Mechanics of Materials Environmental chemistry Photocatalysis engineering Degradation (geology) General Materials Science Nitrogen oxides NOx Civil and Structural Engineering |
| 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 |
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