Author/Authors :
Gholami، Mitra نويسنده 1Depatment of Environmental Engineering, School of Public Health, Center for Water Quality Research, Tehran University of Medical Sciences, Tehran, Iran , , Nassehinia، Hamid Reza نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Jonidi Jafari، Ahmad نويسنده Department of Occupational and Environment Health, Medical Sciences, Tarbiat Modares University, Tehran, Iran. , , Nasseri، Simin نويسنده 1Department of Environmental Health Engineering, School of Public Health and Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran , , Esrafili، Ali نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ,
Abstract :
Background: Mono aromatic hydrocarbons (BTEX) are a group of hazardous pollutants which originate from
sources such as refineries, gas, and oil extraction fields, petrochemicals and paint and glue industries.
Conventional methods, including incineration, condensation, adsorption and absorption have been used for
removal of VOCs. None of these methods is economical for removal of pollutants of polluted air with low to
moderate concentrations. The heterogeneous photocatalytic processes involve the chemical reactions to convert
pollutant to carbon dioxide and water. The aim of this paper is a comparison of Benzene & Toluene removal from
synthetic polluted air using a Nano photocatalytic TiO2/ ZNO process.
Results: The X-ray diffraction (XRD) patterns showed that Nano crystals of TiO2 and ZNO were in anatase and rutile
phases. Toluene & benzene were decomposed by TiO2/ ZNO Nano photocatalyst and UV radiation. Kruskal-wallis
Test demonstrated that there are significant differences (pvalue < 0.05) between pollutant concentrations in different
operational conditions.
Conclusions: Degradation of toluene & benzene increases with increasing UV intensity and decreasing initial
concentrations. Effect of TiO2/ZNO Nano photocatalyst on benzene is less than that on toluene. In this research,
Toluene & benzene removal by TiO2/ZNO and UV followed first-order reactions.
