کارایی نانو اکسید تیتانیوم تثبیت شده بر روی بستر بتنی در حذف رنگزای AB113

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده مهندسی عمران و محیط زیست، دانشگاه تربیت مدرس

2 دانشیار گروه مهندسی محیط زیست، دانشکده مهندسی عمران و محیط زیست، دانشگاه تربیت مدرس

3 استاد گروه مهندسی محیط زیست، دانشکده مهندسی عمران و محیط زیست، دانشگاه تربیت مدرس

چکیده

نیمه‌رساناهای با ساختار نانو، نقش مهمی در تشخیص و تخریب آلاینده‌های شیمیایـی مضـر از جمله رنگزاها ایفا می‌کنند. در این تحقیق، پارامترهای مؤثر شامل روش پوشش‌دهی، pH اولیه، غلظت آلاینده، مصرف انرژی، نوع و شدت توان UV در حذف رنگزای‌ آزویی AB113 به‌روش فتوکاتالیستی توسط نانو ذرات اکسید تیتانیوم تثبیت شده بر بستر بتنی مورد مطالعه قرار گرفت. نتایج نشان داد که روش SSP راندمان بالاتری داشته و افزایش غلظت رنگـزا و کاهش pH باعث کاهش نرخ رنگبری می‌شود. بنابر نتایج حاصل، بیش از 92 درصد رنگزای AB113 با غلظت اولیه 75 پی پی ام و به‌ترتیب 17، 7/6 و 3/9 درصد از حلقه‌های بنزنی، نفتالینی و فنلی و نیز 21 درصد TOC، در pH قلیایی 9 توسط 40 گرم بر متر مربع اکسید تیتانیوم پوشش داده شده بر سطح بستر در حضور لامپ UVC 90 وات در کمتر از 5 ساعت حذف شدند.

کلیدواژه‌ها


عنوان مقاله [English]

Efficiency of Immobilized Nano-TiO2 on Concrete Surface in AB113 Removal

نویسندگان [English]

  • Roya Nayebi 1
  • Bita Ayati 2
  • Hossein Ganjdoust 3
چکیده [English]

Semi conductors with nano-structure play an important role in detecting and destroying harmful chemical contaminants such as dye. In this study, the effective parameters including coating method, initial pH, dye concentration, energy consumption, kind and intensity of UV lamp in AB113 dye removal by photo-catalytic process using TiO2 nano-particles immobilized on concrete bed were studied. The results have shown that the Separated Sealer and Photocatalyst (SSP) method had higher efficiency. According to the results, over 92 percent of 75 ppm AB113 and 17, 6.7 and 9.3 percent of  benezylic, naphthalene and phenolic rings and 21 percent of TOC were removed using 40 gr/m2 immobilized TiO2 and 90 W UV-C lamps at pH 9 in less than 5 hours.

کلیدواژه‌ها [English]

  • Azo dye
  • TiO2
  • Nano Particle
  • photocatalyst
  • UV
  • Total Organic Carbon
1. McMullan, G., Meehan, C., Conneely, A., Kirby, N., Robinson, T., Nigam, I.M., Marchant, R., and Smyth, W.F. (2001). “Microbial decolorization and degradation of textile dyes.” Applied Microbiology and Biotechnology, 56, 81-87.

2. Banat, I.M., Nigam, P., Singh, D., and Marchant, R. (1996). “Microbial decolorization of textile dye containing effluents: A review.” Biores. Technol., 58, 217-227.

3. Pearce, C.I., Lloyd, J.R., and Guthrie, J.T. (2003). “The removal of color from textile wastewater using whole bacterial cells: A review.” Dyes and Pigments, 58, 179-196.

4. Akhtar, S., Khan, A.A., and Husain, Q. (2005). “Potential of immobilized bitter gourd (Momordica charantia) peroxidases in the decolorization and removal of textile dyes from polluted wastewater and dyeing effluent.” Chemosphere, 60, 291-301.

5. Azbar, N., Yonar, T., and Kestioglu, K. (2004). “Comparison of various advanced oxidation processes and chemical treatment methods for COD and color removal from a polyester and acetate fiber dyeing effluent.” Chemosphere, 55, 35-43.

6. Zille, A. (2005). “Laccase reactions for textile applications.” Ph.D. Thesis, Universidad do Minho, Ferench.

7. Altinbas, U., Domeci, S., and Baristiran, A. (1995). “Treatability study of wastewater from textile industry.” Environmental Technology, 16, 389-394.

8. Movahedian Attar, H., and Rezaee R. (2006). “Investigating the efficiency of advanced photochemical oxidation (APO) technology in degradation of direct azo dye by UV/H2O2 process.” J. of Water and Wastewater, 59, 75-83. (In Persian)

9. Ehrampoosh, M.H., Moussavi, G.R., Ghaneian, M.T., Rahimi, S., and Ahmadian, M. (2011). “Removal of Methylene blue dye from textile simulated sample using tubular reactor and TiO2/UV-C photocatalytic process.” Iranian Journal of Environmental Health Science and Engineering, 8 (1), 35-40.

10. Konstantinou, I.K., and Albanis, T.A. (2004). “TiO2-assisted photo-catalytic degradation of azo dyes in aqueous solution: Kinetic and mechanistic investigations: A Review.” Appl. Catalyst., B: Environ., 49 (1),
1-14.

11. Gaya U.I., and Abdullah A.H. (2008). “Heterogeneous photocatalytic degradation of organic contaminants over titanium dioxide: A review of fundamentals, progress and problems.” J. of Photochem. Photobiol. C: Photochem. Rev, 9, 1-12.

12. Jeni, J., and Kanmani, S. (2011). “Solar nano photocatalytic decolorization of reactive dyes using titanium dioxide.” Iranian Journal of Environmental Health Science and Engineering, 8(1), 15-24.

13. Mahmoodi, N., Arami, M., Limaee, N., and Gharanjig, K. (2006). “Decolorization and mineralization of textile dyes at solution bulk by heterogeneous nano photocatalysis using immobilized nano particles of titanium dioxide.” Colloid Surface A: Physicochemical  Engineering Aspects, 29, 125-131.

14. Anousha, M., Samadi, M., Hosseini, N., and Khodadadi, M. (2009). “Performance comparison of two methods of advanced oxidation ozonation and combination of TiO2/UV on removal of acidic dyes including Acid Black10B and Cyanin 5RAcid.” 12th National Conference on Health and Environmental, Shahid Beheshti University of Medical Sciences, Tehran.

15. Velmurugan, R., Krishnakumar, B., Kumar, R., and Swaminathan, M. (2011). “Solar active nano-TiO2 for mineralization of reactive red 120 and trypan blue.” Arabian Journal of Chemistry, 5(4), 447-452.

16- Yua, C.H., Wu, C.H., Ho, T.H., and Hong, P.K. A. (2010). “Decolorization of C.I. reactive black 5 in UV/TiO2, UV/oxidant and UV/TiO2/oxidant systems: A comparative study.” Chemical Engineering Journal, 158 (3), 578-583.

17. Saravanan, M., Pabmanavhan, N., and Sivarjan, M. (2006). “Kinetics of heterogeneous photo-catalytic degradation of reactive dyes in an immobilized TiO2 photo-catalytic reactor.” J. of Colloid Interface Science, 295 (1), 159-164.

18. Ghodsian, M. (2011). “Dye removal by TiO2 nanoparticles immobilized on concrete surface using UV.” M.Sc. Thesis, Tarbiat Modares University. (In Persian)

19. www.dyeproservices.com (May 2012)

20. Saravanan, M., Pabmanavhan, N., and Sivarjan, M. (2010). “Treatment of acid blue 113 dye solution using iron electro-coagulation.” Clean Soil, Air, Water, 38 (5-6), 565-571.

21. Greenberg, A.E., Eaton, A.D., and Mary Ann, H.F. (2005). Standard methods for the examination of water and wastewater, 21st Ed., APHA, AWWA, WPCF, Washington DC, USA.

22. Tian, C. Z. (2009). “Nanotechnologies for water environment applications.” Technology and Engineering, 3, 59-65.

23. Watts, M.J., and Cooper, A.T. (2008). “Photocatalysis of 4-chlorophenol mediated by TiO2 fixed to concrete surfaces.” Solar Energy, 82, 206-211.

24. Bakaullah, S.B., Rauf, M.A., and Ashraf, S.S. (2007). “Photo-catalytic decolorization of coomassie brilliant blue with titanium oxide.” Dyes and Pigments, 72, 353-356.

25. Concalves, M.S.T., Oliveira-Campos, A.M.F., Pinto, M.M.S., Plasencia, P.M.S., and Queiroz, M.J.R.P. (1991). “Photochemical treatment of solutions of azo dyes containing TiO2.” Chemosphere, 39 (5), 781-786.

26. Neppolian, B., Choi, H.C., Sakthivel, S., Arabindoo B., and Murugesan, V. (2002). “Solar light induced and TiO2 assisted degradation of textile dye reactive blue 4.” Chemosphere, 46, 1173-1181.

27. Damodar, R.A., Jagannathan, K., and Swaminathan, T. (2007). “Decolorization of reactive dyes by thinfilm immobilized surface photo-reactor using solar irradiation.” Solar Energy, 81, 1-7.

28. Baran, W., Makowski, A., and Wardas, W. (2008). “The effect of UV radiation absorption of cationic and anionic dye solutions on their photo-catalytic degradation in the presence of TiO2.” Dyes and Pigments, 76, 226-230.

29.Damodar, R.A., and Yua, S.J. (2010). “Performance of an integrated membrane photo-catalytic reactor for the removal of reactive black 5.” Separation and Purification Technology, 71, 44-49.