Iran Occupational Health

 

 
Background and aims: With the increasing air pollution to volatile organic compounds, in critical demand of a new environmentally, friendly technologies to remove these contaminants from the air stream is of interest to everyone. Photocatalytic processes, including processes, are considered, radiation may be in the future as a new and promising technology used for the removal of vapors volatile organic solvents from the air stream.The aim of this study photocatalytic removal of toluene vapors using zeolite Y is impregnated with nanoparticles of titanium dioxide.
Methods: after preparing raw equipment and materials, first titanium dioxide nanoparticles loaded on the substrate of zeolite by wet impregnation method and two grams of the bed was placed in a reactor equipped with UV radiation.Then to help Construction concentration dynamic system, concentrations of 50, 150 and 300 ppm of toluene was prepared and injected into the reactor at the flow rate of 1 liter per minute. In the final stage, By measuring the inlet and outlet of the reactor concentration, The Absorption and removal efficiency of photocatalytic bed prepared were investigated.
Results: photos and graphs obtained through XRD and SEM-EDAX showed that the nanoparticles are well sitting on the outer surface and pores bed. On the other hand, In determining bed performance turned out, By increasing the concentration of 50 to 300 ppm of toluene, bed photocatalytic removal efficiency was decreased, And also the removal efficiency at 50, 150 and 300 ppm, respectively 50, 48 and 20 percent, Was obtained.
Conclusion: The results indicated that use of zeolite is impregnated with nanoparticles of titanium dioxide not suitable for the removal of VOCs from the air stream is, especially in concentrations of 50 to 150 ppm, And given its low operating costs compared to other methods of the catalyst It is recommended that additional studies be conducted in this field.