en عمومى General مقاله اصیل Original Article <div style="text-align: justify;">Background: Volatile organic compounds are the major environmental pollutants causing adverse effects on the human health and the environment, therefore, tremendous effort has been put toward eliminating these compounds.<br> Methods: In this study, the effect of synthesized nanoparticles on the removal of styrene from gas phase by photocatalytic process under UV irradiation in the cylindrical photoreactor was studied. The activated carbon-zinc oxide (AC-ZnO) catalysts were prepared at different weight ratios (6%, 12%, and 18%) of ZnO. The prepared catalyst was characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and Brunauer Emmett-Teller (BET) analyses. The effects of various parameters, such as concentrations of styrene, various weight percentage (wt%) of nanoparticles, and UV irradiation, were investigated. The efficiency of the AC-ZnO catalyst was determined based on its adsorption capacity, breakthrough time, and removal efficiency.<br> Results: It was revealed that the photocatalytic removal efficiency of styrene was high in the presence of both ZnO nanoparticle and AC under UV light. Under optimal conditions, the efficiency of UV/ACZnO 18%, UV/AC-ZnO 12%, and UV/AC-ZnO 6% catalysts was 77%, 86%, and 83%, respectively. By increasing the concentration of input styrene, the photocatalytic removal efficiency was reduced, while the adsorption capacity of styrene increased.<br> Conclusion: According to the results, the AC-ZnO 12% exhibited higher activity compared to other photocatalysts. Also, the amount of stabilized ZnO nanoparticles on the activated carbon affects the elimination rate of styrene.</div> Photocatalysis, Activated carbon, Styrene, Zinc oxide 225 232 http://ehemj.com/browse.php?a_code=A-10-1-151&slc_lang=en&sid=1 Mojtaba Nakhaei Pour nakhaeimojtaba13@gmail.com 10031947532846005815 10031947532846005815 No Occupational Health Engineering, Social Development and Health Promotion Research Center, Gonabad University of Medical Sciences, Gonabad, Iran Hossein Ali Rangkooy rangkoy@gmail.com 10031947532846005816 10031947532846005816 No Occupational Health Engineering, Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran Fereshteh Jahani jahani.f71@gmail.com 10031947532846005817 10031947532846005817 No Occupational Health Engineering, Department of Occupational Health, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran Ameneh Golbaghi amn.golbaghi@gmail.com 10031947532846005818 10031947532846005818 No Occupational Health Engineering, Department of Occupational Health, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran Hosein Shojaee- Farah Abady shojaeeh412@gmail.com 10031947532846005819 10031947532846005819 No Occupational Health Engineering, Department of Occupational Health Engineering, School of Health, Zabol University of Medical Sciences, Zabol, Iran Leila Nematpour Lnematpour94@gmail.com 10031947532846005820 10031947532846005820 Yes Corresponding author: Occupational Health Engineering, Department of Occupational Health, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran