Volume 6, Issue 4 (Autumn 2017)                   JOHE 2017, 6(4): 190-198 | Back to browse issues page

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1- MSc in Occupational Health Engineering, Dept. of Occupational Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
2- Assistant Prof. of Occupational Health Engineering, Dept. of Occupational Health, Faculty of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
3- MSc in Occupational Health Engineering, Dept. of Occupational Health Engineering, Faculty of Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
4- MSc in Health, Safety and Environment, Faculty of Health, Safety, and Environment, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
5- MSc in Occupational Health Engineering, Dept. of Occupational Health, Faculty of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. , nakhaei.m@ajums.ac.ir
Abstract:   (3261 Views)
Background: Volatile organic compounds (VOC) are considered as major environmental contaminants that have a harmful effect on human and ecosystem health, so much effort has been focused on their removal. The aim of this study was to investigate the removal efficiency of styrene by Zeolite Socony Mobil-5 (ZSM-5) after immobilization of nanoparticles of zinc oxide (ZnO) on it.
Materials and Methods: In this experimental study and in order to produce styrene, clean dry air with a constant flow rate of 1 l/minute was pumped into an impinger containing styrene solution which resulted in the evaporation of styrene. Produced vapors entered into the mixing chamber to be mixed with clean air. Produced styrene with certain concentrations of 20, 100 and 300 ppm was sent to a reactor containing ZSM-5/ZnO bed to investigate the effectiveness of the bed in the elimination of styrene.
Results: This study focused on removal of styrene using ZnO nanoparticles stabilized on ZSM-5 Zeolite. The highest removal efficiency of styrene was 47.5% in concentrations of 20 ppm. For concentrations of 100 and 300 ppm, the efficiency was 22% and 12.5%, respectively.
Conclusions: Both adsorption and catalytic mechanisms can be effective in removal of pollutants in different conditions. Findings related to adsorption and removal of styrene also showed that coating ZnO nanoparticles on zeolite absorbent in presence of ultraviolet (UV) has increased the removal efficiency.
Keywords: Styrene [MeSH], Zinc Oxide [MeSH], ZSM-5 [MeSH], Air [MeSH],
Full-Text [PDF 604 kb]   (537 Downloads) |   |   Full-Text (HTML)  (430 Views)  
Type of Study: original article | Subject: Occupational Health
Received: 2017/06/13 | Accepted: 2017/10/31 | ePublished: 2018/01/8

1. Adamson AW, Gast AP. Physical chemistry of surfaces. 6th ed. Hoboken, New Jersey, United States: John Wiley & Sons, Inc; 1997. [Book]
2. Hunter P, Oyama ST. Control of volatile organic compound emissions: Conventional and Emerging Technologies. 1st ed. Hoboken, New Jersey, United States: John Wiley & Sons, Inc; 2000. [Book]
3. Prieto-Castello MJ, Amorós DM, Garcia-Sagredo JM, Llorens AC. Evaluation of cytogenetic damage on workers exposed to low levels of styrene. Toxicol Lett 2011; 205(Supplement):S64. [Article] [DOI]
4. Komarneni S, Esquivel S, Noh YD, Sitthisang S, Tantirungrotechai J, Li H, et al. Novel synthesis of nanophase anatase under conventional-and microwave-hydrothermal conditions: DeNOx properties. Ceram Int 2014; 40(1)Part B:2097-102. [Sciencedirect]
5. Hashimoto K, Irie H, Fujishima A. TiO2 photocatalysis: a historical overview and future prospects. Jap J Appl Phys 2005; 44(12)Part 1:8269-85. [Article]
6. Fujishima A, Zhang X, Tryk DA. TiO2 photocatalysis and related surface phenomena. Surf Sci Rep 2008; 63(12):515-82. [Sciencedirect] [DOI]
7. Baruah S, Dutta J. Hydrothermal growth of ZnO nanostructures. Sci Technol Adv Mater 2009; 10(1):1-18. [Article] [DOI]
8. Ehrentraut D, Sato H, Kagamitani Y, Sato H, Yoshikawa A, Fukuda T. Solvothermal growth of ZnO. Progress in Crystal Growth and Characterization of Materials 2006; 52(4):280-335. [Sciencedirect] [DOI]
9. Lizama C, Freer J, Baeza J, Mansilla HD. Optimized photodegradation of reactive blue 19 on TiO2 and ZnO suspensions. Catal Today 2002; 76(2-4):235-46. [Sciencedirect] [DOI]
10. Baruah S, Dutta J. Nanotechnology applications in pollution sensing and degradation in agriculture: a review. Environ Chem Lett 2009; 7(3):191-204. [Article] [DOI]
11. Meléndrez MF, Hanks K, Leonard-Deepak F, Solis-Pomar F, Martinez-Guerra E, Pérez-Tijerina E, et al. Growth of aligned ZnO nanorods on transparent electrodes by hybrid methods. J Mater Sci 2012; 47(4):2025-32. [Article] [DOI]
12. Zhang Q, Dandeneau ChS, Zhou X, Cao G. ZnO nanostructures for dye‐sensitized solar cells. Adv Mater 2009; 21(41):4087-108. [Article] [DOI]
13. Shinagawa T, Watase S, Izaki M. Size-controllable growth of vertical ZnO nanorod arrays by a pd-catalyzed chemical solution process. Cryst Growth Des 2011; 11(12):5533-9. [Article] [DOI]
14. Zhang J, Wang Sh, Xu M, Wang Y, Zhu B, Zhang Sh, et al. Hierarchically porous ZnO architectures for gas sensor application. Cryst Growth Des 2009; 9(8):3532-7. [Article] [DOI]
15. Hong RY, Li JH, Chen LL, Liu DQ, Li HZ, Zheng Y, et al. Synthesis, surface modification and photocatalytic property of ZnO nanoparticles. Powder Technol 2009; 189(3):426-32. [Sciencedirect] [DOI]
16. Akin MB, Oner M. Photodegradation of methylene blue with sphere-like ZnO particles prepared via aqueous solution. Ceram Int 2013; 39(8):9759-62. [Sciencedirect] [DOI]
17. Nezamzadeh-Ejhieh A, Bahrami M. Investigation of the photocatalytic activity of supported ZnO–TiO2 on clinoptilolite nano-particles towards photodegradation of wastewater-contained phenol. Desalination Water Treat 2015; 55(4):1096-104. [Article] [DOI]
18. Mumpton FA. Using zeolites in agriculture. In: Elfring Ch, editor, Innovative biological technologies for lesser developed countries-Workshop Proceedings. Washington DC, US: Office of Technology Assessment, OTA; 1985. [Book]
19. Kazemian H. Introduction to Zeolites, Misterious Minerals. Tehran: Behesht; 2005. P.124-8.
20. Wang H, Pinnavaia TJ. MFI zeolite with small and uniform intracrystal mesopores. Angew Chem Int Ed Engl 2006; 45(45):7603-6. [Article] [DOI]
21. Mohamed RM, Ismail AA, Othman I, Ibrahim IA. Preparation of TiO2-ZSM-5 zeolite for photodegradation of EDTA. J Mol Catal A Chem 2005; 238(1-2):151-7 [Sciencedirect] [DOI]
22. Chen JCh, Tang ChT. Preparation and application of granular ZnO/Al2O3 catalyst for the removal of hazardous trichloroethylene. J Hazard Mater 2007; 142(1-2):88-96. [Sciencedirect] [DOI]
23. Rostami R, Jonidi Jafari A, Rezaee Kalantari R, Gholami M. Survey of modified clinoptilolite zeolite and cooper oxide nanoparticles-containing modified clinoptilolite efficiency for polluted air BTX removal. Iranian Journal of Health and Environment 2012; 5(1):1-8. [Article]
24. Khatamian M, Alaji Z. Efficient adsorption-photodegradation of 4-nitrophenol in aqueous solution by using ZnO/HZSM-5 nanocomposites. Desalination 2012; 286:248-53. [Sciencedirect] [DOI]
25. Jeong J, Sekiguchi K, Lee W, Sakamoto K. Photodegradation of gaseous volatile organic compounds (VOCs) using TiO2 photoirradiated by an ozone-producing UV lamp: decomposition characteristics, identification of by-products and water-soluble organic intermediates. J Photochem Photobiol A Chem 2005; 169(3):279-87 [Sciencedirect] [DOI]
26. Rangkooy H-A, Rezaee A, Khavanin A, Jafari AJ, JonidiJafari A, Khoopaie A-R. A Study on photocatalytic removal of formaldehyde from air using ZnO nanoparticles immobilized on bone char. Qom University of Medical Sciences Journal 2013; 7(2):17-26. [Article]
27. Mo J, Zhang Y, Xu Q, Lamson JJ, Zhao R. Photocatalytic purification of volatile organic compounds in indoor air: a literature review. Atmos Environ 2009; 43(14):2229-46. [Sciencedirect] [DOI]
28. Mishra T, Mohapatra P, Parida KM. Synthesis, characterisation and catalytic evaluation of iron–manganese mixed oxide pillared clay for VOC decomposition reaction. Appl Catal B 2008; 79(3):279-85. [Sciencedirect] [DOI]
29. Rezaei E, Soltan J, Chen N. Catalytic oxidation of toluene by ozone over alumina supported manganese oxides: Effect of catalyst loading. Appl Catal B 2013; 136-137:239-47. [Sciencedirect] [DOI]
30. Asilian H, Khavanin A, Afzali M, Dehestani S, Soleimanion A. Removal of styrene from air by natural and modified zeolite. Health Scope 2012; 1(1):7-11. [Article] [DOI]