Equilibrium and Thermodynamic Studys of Adsorption of Azo Dyes on The Local Bentonite Clay
JOURNAL OF EDUCATION AND SCIENCE,
2019, Volume 28, Issue 2, Pages 50-70
AbstractThis work is included the synthesizs of two azo dyes from the reaction of p-methoxy aniline and 2-amino benzo thiazol .via diazounium ions.A number of clays are tested as adsorbents for the removal of these dyes from their aqueous solution by adsorption . The most efficied one was selected to peforme this study . The prepared dyes are characterized by some of their physical propertier such as(lmax) , (emax) melting point. Stretch bond of (N=N) group by(IR)spectrometry and colours.
The optimal condition of the adsorption systems undre study such as effect of does ,initial concentration ,and temperature wear investigated .
Two isotherm models,Langmuir and Freundlich were fitted to the experimental data of adsorption .the thermodynamic Function ( ∆H, ∆G°,∆S°) are estimated. The results of the thermodynamic study showed that ,the forces controlling the adsorption process of the systems under considerate are physical in nature . The adsorption process are exothermic , occur spontaneously in the direction of connecting the dye to the clay surface ,and forming less random system.
1. Emad. A. AL–Hyali, O. M. Ramadhan and S. A. AL- Dobone, "Effect of substituents type on the adsorption of aromatic carboxylic acid and their relation to concentration, temperature and pH", Raf. Jour. Sci., vol. 16, No. 3, pp. 68-78(2005).
2. Team. H. Wallace, ''Biological treatment of synthetic dye water and an industrial textile wastewater containing azo dya compounds'', Blak burg Virginia(2001).
3. Smeth. K, S. N. Upadhyay and Y. D. Upadhya, "Removal of phenols of adsorption on fly ash", J. Chem. Tech. Biotechnol., 37, pp. 281-290,(1987).
4. T. O. Ryabukhova, S. Arzamaa, A. B. Okishevana and S. N. Konovalova, "Adsorption of alcohol’s from binary solution on activated carbons", Russian J. of Physical Chemistry, 74, 2, pp.281–283, (2000).
5. I. Vogel, "A Textbook of practical organic chemistry",
3rd ed., Longmans, Green and Co. Ltd., London, pp. 622- 623(1964).
6. Y. Bulut, N. Gozubenli, H. Aydm, "Equilibrium and kinetics studies of adsorption of direct blue 71 from aqueous solution by wheat shells", J. Hazard. Mater., 144, pp. 303-305(2007).
7. Beter. S. Inbaraj, J. T. Chien, G. H. HO, J. Yang and B. H. Chen , "Equilibrium and kinetic studies on sorption of basic dyes by a natural biopolymer poly (γ - glutamic acid)", J. Biochemistry and Eng. 31. pp. 209-211(2006)
8. S. S. Reddy, B. Kotaiah, N. S. P. Reddy, M. Velu, ''The removal of composite reactive dye from dyeing unit effluent using sewage sludge derived from activated carbon'' Turk. J. Eng. Env. Sci., 30, 370(2006).
9. Aiman S. M. T., M.Sc. Shndala.Thesis, College of Education, University of Mosul(2012) .(In Arabic)
10.Raiad.T.Alabade.,Ph.D. College of Education, University of Mosul(2010) .(In Arabic)
11. S. Knaebel Kent, "Adsorbent selection", Adsorption Research, Inc., Dublin, Ohio, 43016, pp. 1–23(2003).
12. C. H. Wu, "Adsorption of reactive dyes onto carbon nanotubes: Equilibrium, Kinetics and thermodynamics", J. Hazard. Mater., 144, pp. 96-98, (2007).
- Article View: 197
- PDF Download: 804