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Vol.2 , No. 6, Publication Date: Nov. 27, 2015, Page: 86-92
 azo dye from aqueous solution. The impact of the operational parameters namely; pH, contact time, initial dye concentration, temperature and adsorbent dose were studied using UV–Visible spectroscopic technique at wavelength = 540 nm. The adsorption kinetics were described better using pseudo-second order model and the adsorption isotherm was elucidated via Langmuir and Freundlich models which indicate that the EBT adsorption onto anatase TiO<sub>2</sub> nano catalyst fitted with both models, however better with Freundlich isotherm. The equilibrium time was found to be 30 minutes. The best results were achieved at pH = 3 and T = 293 K. The thermodynamic parameters, ΔG, ΔH, and ΔS were calculated. The negative value of ΔH indicates that the adsorption process is exothermic.&picture=http://www.aascit.org/aascit/decorators/img/journal/924.jpg)
| [1] | Israa N. Ismaeel, Department of Chemistry, College of Science, Al-Nahrain University, Al-Jadriya, Baghdad, Iraq. |
| [2] | Hilal S. Wahab, Department of Chemistry, College of Science, Al-Nahrain University, Al-Jadriya, Baghdad, Iraq. |
Nanosized anatase TiO2 powder was used for the adsorption of Eriochrome Black-T (EBT) azo dye from aqueous solution. The impact of the operational parameters namely; pH, contact time, initial dye concentration, temperature and adsorbent dose were studied using UV–Visible spectroscopic technique at wavelength = 540 nm. The adsorption kinetics were described better using pseudo-second order model and the adsorption isotherm was elucidated via Langmuir and Freundlich models which indicate that the EBT adsorption onto anatase TiO2 nano catalyst fitted with both models, however better with Freundlich isotherm. The equilibrium time was found to be 30 minutes. The best results were achieved at pH = 3 and T = 293 K. The thermodynamic parameters, ΔG, ΔH, and ΔS were calculated. The negative value of ΔH indicates that the adsorption process is exothermic.
Keywords
Anatase, TiO2, EBT, Adsorption, Langmuir, Freundlich, Azo Dye
Reference
| [01] | L. Al-Khatib, F. Fraige, M. Al-Hwaiti, O. Al-Khashman "Adsorption from aqueous solution on to natural and acid activated bentonite" Am. J. Environ. Sci. 8 (2012) 510-522. |
| [02] | P. N Dave, S. Kaur, E. Khosla "Removal of Eriochrome black-T by adsorption on to eucalyptus bark using green technology" Indian J. Chem. Technol. 18 (2011) 53–60. |
| [03] | N. Barka, M. Abdelnouri, M. El- Makhfouk "Removal of Methylene Blue and Eriochrome Black T from aqueous solutions by biosorption on Scolymushispanicus L.: Kinetics, equilibrium and thermodynamics" J. Tech. Inst. Chem. Eng. 42 (2011) 320-326. |
| [04] | H. J Sonba, S. H. Ridha "Thermodynamics and Kinetics of Adsorption of Eriochrome Black-T from Aqueous Media on Rice bran and on its coal" Acta Chim. Pharm. Indica: 4 (2014) 111-118. |
| [05] | V. Laxmi "Removal of Malachite Green Dye from Water Using Orange Peel as an Adsorbent" M. Eng. thesis, National Institute of Technology, 2010. |
| [06] | F. Moeinpour, A. Alimoradi, M. Kazemi "Efficient removal of Eriochrome black-T from aqueous solution using NiFe2O4 magnetic nanoparticles" J. Environ. Health Sci. Eng. 12 (2014)112-118. |
| [07] | A. A. Hussain " Photocatalytic Oxidation of Phenol Red on Nanocrystalline TiO2 Particles", M.Sc. Thesis, Al-Nahrain University 2014. |
| [08] | R. Ansari, Z. Mosayebzadeh, M. B. keivani, A. Mohammad-khah "Adsorption of Cationic Dyes from Aqueous Solutions using Polyaniline Conducting Polymer as a Novel Adsorbent" J. Adv. Sci. Res 2 (2011) 27-34. |
| [09] | B. K. Nandi, A. Goswami, M. K. Purkait " Removal of cationic dyes from aqueous solutions by kaolin: Kinetic and equilibrium studies" Appl. Clay Sci. 42 (2009) 583–590. |
| [10] | R. Sivaraj, C. Namasivayam, K. Kadirvelu, "Orange peel as an adsorbent in the removal of acid violet 17 (acid dye) from aqueous solutions" Waste Manag. 21 (2001) 105-110. |
| [11] | M. D. G. de Luna, E. D. Flores, D. A. D. Genuino, C. M. Futalan, M.W. Wan " Adsorption of Eriochrome Black T (EBT) dye using activated carbon prepared from waste rice hulls—Optimization, isotherm and kinetic studies" J. Taiwan Inst. Chem. Eng. 44 (2013) 646–653. |
| [12] | M. E. Argun, S. Dursun, M. Karatas, M. Guru " Activation of pine cone using Fenton oxidation for Cd(II) and Pb(II) removal" Bioresource Technol. 99 (2008) 8691–8698. |
| [13] | M. T. Yagub, T. K. Sen, S. Afroze, H.M. Ang " Dye and its removal from aqueous solution by adsorption: A review" Adv. Coll. Inter. Sci. 209 (2014) 172–184. |
| [14] | G. S. Dawood " Removal Orange (G) Dye from aqueous solution by adsorption on Bentonite" Tikrit J. Pure Sci. 15 (2010) 231-235. |
| [15] | K. Dong, F. Qiu , X. Guo , J. Xu, D. Yang, K. He " Adsorption Behavior of Azo Dye Eriochrome Black T from Aqueous Solution by β-Cyclodextrins / Polyurethane Foam Material" Polym. Plast. Technol. Eng. 52 (2013) 452–460. |
| [16] | D. Suna,, X. Zhanga, Y. Wu, X. Liu " Adsorption of anionic dyes from aqueous solution on fly ash" J. Hazard. Mater. 181 (2010) 335– 342. |
| [17] | M. Alkan, O. Demirbas, M. Dogan " Adsorption kinetics and thermodynamics of an anionic dye onto sepiolite"; Micropor. Mesopor. Mater. 101 (2007) 388–396. |
| [18] | A.A. Ahmad, B.H. Hameed, N. Aziz" " Adsorption of direct dye on palm ash: Kinetic and equilibrium modeling"; J. Hazard. Mater. 141 (2007) 70–76. |
| [19] | S. Azizian " Kinetic models of sorption: a theoretical analysis" J. Coll. Int. Sci. 276 (2004) 47–52. |
| [20] | A. Srinivasan, T. Viraraghavan " Decolorization of dye waste waters biosorbents: A review" J. Environ. Manag. 91 (2010)1915-19 29. |
| [21] | M. A. Mahmoud "Removal of uranium (VI) from aqueous solution using low cost and eco-friendly adsorbents " J. Chem. Eng. Process Technol. 4 (2013) 1-4. |
