Styrene monomer is a volatile organic compound that has many applications in plastics, rubber, and paint manufacturing industries. Exposure to styrene vapor has certain effects, including suppression of the central nervous system, loss of concentration, weakness and fatigue, and nausea and there is a possibility of carcinogenesis in long-term exposure. Therefore, it is necessary to control and eliminate this vapor. The aim of this study was to investigate the performance of zinc oxide nanoparticles on modified natural zeolites in removing styrene vapor from the air. Natural zeolites of clinoptilolite were modified using hydrochloric acid and diphenyldichlorosilane. Next, zinc oxide nanoparticles with different ratios of 3, 5, and 10wt% were stabilized on the zeolites. To determine their characteristics, samples were used from BET, SEM and XRD analyses. The input styrene concentration and the ratio of nanoparticles stabilized on zeolites were studied as effective functional parameters on the removal process. The efficiency results of natural zeolites (Ze) and modified zeolites (Mze) in styrene adsorption from the air show that the styrene breakthrough in the bed of MZe compared to that of Ze increases approximately two times. Also, the results showed that the removal by the process of UV/MZe-ZnO 3%, UV/MZe-ZnO 5%, and UV/MZe-ZnO 10%, was 36.5%, 40%, and 26%, respectively. From the results it can be concluded that MZe can increase the efficiency of photocatalytic degradation. Clinoptilolites of Iran can be used as an adsorbent to remove polluted air in industries that have low concentrations and flow rates.

Photocatalytic Degradation Zinc Oxide Nanoparticles Styrene Zeolite

Hunter P, Oyama ST, Control of volatile organic compound emissions, John Wiley (2000).
US Environmental Protection Agency (USEPA). Sources of indoor air pollution - organic gases (volatile organic compounds, VOCs). USEPA (2013).
Grzechulska-Damszel J, Mozia S, Morawski AW, Catal. Today, 156(3-4), 295 (2010)
Thiruvenkatachari R, Vigneswaran S, Moon IS, Korean J. Chem. Eng., 25(1), 64 (2008)
Crittenden JC, Liu J, Hand DW, Perram DL, Water Res., 31, 429 (1997)
De Lasa HI, Serrano B, Salaices M, Photocatal. React. Engin. Springer (2005).
Saien J, Soleymani AR, J. Ind. Eng. Chem., 18(5), 1683 (2012)
Charinpanitkul T, Nartpochananon P, Satitpitakun T, Wilcox J, Seto T, Otani Y, J. Ind. Eng. Chem., 18(1), 469 (2012)
Zhang W, Li Z, Luo Y, Yang J, J. Phys. Chem., 113, 8302 (2009)
Hashimoto K, Irie H, Fujishima A, Japan J. Appl. Phys., 44, 8269 (2005)
Fujishima A, Zhang X, Tryk DA, Surf. Sci. Rep., 63, 515 (2008)
Muruganandham M, Zhang Y, Suri R, Lee GJ, Chem PK, Hsieh SH, Sillanpyaa M, Wu JJ, J. Nanosci. Nanotechnol., 15, 6900 (2015)
Baruah S, Dutta J, Sci. Technol. Adv. Mater. (2009).
Ehrentraut D, Sato H, Kagamitani Y, Sato H, Yoshikawa A, Fukuda T, Prog. Crys. Growth Characterization of Materials, 52, 280 (2006)
Tabrizi GB, Mehrvar M, J. Environ. Sci. Health Part A-Toxic/Hazard. Subst. Environ. Eng., 39, 3029 (2004)
Jibril BY, Atta AY, Al-Waheibi YM, Al-Waheibi TK, J. Ind. Eng. Chem., 19(6), 1800 (2013)
Safari M, Nikazar M, Dadvar M, J. Ind. Eng. Chem., 19(5), 1697 (2013)
Komatsu T, Takasaki M, Ozawa K, Furukawa S, Muramatsu A, J. Phys. Chem., 117, 10483 (2013)
Nezamzadeh-Ejhieh A, Khorsandi S, J. Ind. Eng. Chem., 20(3), 937 (2014)
Mansouri N, reza Massoudinejad M, Asilian H, Mafreshi A, J. Kermanshah. Univ. Med. Sci., 14, 3 (2010)
Alejandro S, Valdes H, Manero MH, Zaror CA, Water Sci. Technol., 66, 1759 (2012)
Valdes H, Alejandro S, Zaror CA, J. Hazard. Mater., 227, 34 (2012)
Shahmirzadi MAA, Hosseini SS, Tan NR, Korean J. Chem. Eng., 33(12), 3529 (2016)
Posa VR, Annavaram V, Koduru JR, Ammireddy VR, Somala AR, Korean J. Chem. Eng., 33(2), 456 (2016)
Ao CH, Lee SC, Appl. Catal. B: Environ., 44(3), 191 (2003)
Ao C, Lee S, J. Photochem. Photobiol. A-Chem., 161, 131 (2004)
Ichiura H, Kitaoka T, Tanaka H, Chemosphere, 50, 79 (2003)
Zhang PY, Liu J, Zhang ZL, Chem. Lett., 33(10), 1242 (2004)
Sun RD, Nakajima A, Watanabe I, Watanabe T, Hashimoto K, J. Photochem. Photobiol. A-Chem., 136, 111 (2000)
U.S.E.P.A. (USEPA), Sources of indoor air pollution-organic gases (volatile organic compounds, VOCs), http://www.epa.gov/iaq/voc.html.
Tossavainen A, The Scandinavian Journal of Work, Environment & Health, 4 (1978).
EPA. Drinking Water Standards Technical Factsheet on: Styrene. Water, 1 (1993).
Lim M, Zhou Y, Wood B, Guo Y, Wang L, Rudolph V, Lu G, J. Phys. Chem., 112, 19655 (2008)
TOXICOLOGICAL PROFILE FOR STYRENE, Life Systems, Inc. Under Subcontract to:Clement International Corporation Under Contract No. 205-88-0608. Agency for Toxic Substances and Disease Registry U.S. Public Health Service (1992).
Threshold Limit Value For Chemical Substances And Physical Agents And Biological Exposure Indices, American Conferences Of Government Industrial Hygienists (ACGIH) (2012).
Huttenloch P, Roehl KE, Czurda K, Environ. Sci. Technol., 35, 4260 (2001)
Asilian H, Khavanin A, Afzali M, Dehestani S, Health Scope., 2012, 7 (2012)
Zhu YP, Li M, Liu YL, Ren TZ, Yuan ZY, J. Phys. Chem., 118, 10963 (2014)
Hernandez MA, Corona L, Gonzalez AI, Rojas F, Lara VH, Silva F, Ind. Eng. Chem. Res., 44(9), 2908 (2005)
Khatamian M, Alaji Z, Desalination, 248, 286 (2012)
Chen JC, Tang CT, J. Hazard. Mater., 142(1-2), 88 (2007)
Mo J, Zhang Y, Xu Q, Lamson JJ, Zhao R, Atmos. Environ., 43, 2229 (2009)
Nath RK, Zain MFM, Kadhum AAH, Kaish A, Constr. Build. Mater., 54, 348 (2014)
Friesen DA, Morello L, Headley JV, Langford CH, J. Photochem. Photobiol. A-Chem., 133, 213 (2000)
DeSilva FJ, Water quality products, 16 (2000).
Rezaee A, Rangkooy H, Jonidi-Jafari A, Khavanin A, Appl. Surf. Sci., 286, 235 (2013)
Wang HC, Liang HS, Chang MB, J. Hazard. Mater., 186(2-3), 1781 (2011)
Mishra T, Mohapatra P, Parida KM, Appl. Catal. B: Environ., 79, 3 (2008)
Rezaei E, Soltan J, Chen N, Appl. Catal. B: Environ., 136, 239 (2013)