Metil Kırmızısının Silikajel Üzerindeki Çözeltiden Adsorpsiyonu: Denge İzotermleri Ve Kinetik İncelemeler

Bu çalışmanın amacı, sulu çözeltiden metilen kırmızısının uzaklaştırılmasıdır. Bu çalışmada adsorban olarak silikajel kullanılmıştır. Farklı pH’larda (2, 3, 4, 7, 10) 20 mg adsorban ile çalışmalar yapılmıştır. Deneysel veriler, Langmuir, Freundlich, Dubinin-Radushkevich-Kaganer (DKR), Temkin ve Brunauer-Emmett-Teller (BET) denklemleri kullanılarak analiz edilmiş ve bu denklemlerin sabitleri belirlenmiştir. 20 mg/L’lik boya çözeltilerinin Langergren yalancı birinci derece ve yalancı ikinci derece hız denklemine uygunluğu denenmiştir. Termodinamik parametrelerden adsorpsiyon entalpisi (∆Ho), Gibbs serbest entalpisi (∆Go) ve adsorpsiyon entropisi (∆So) değerleri hesaplanmıştır. Sonuç olarak, elde edilen veriler adsorpsiyonun fiziksel, ekzotermik ve kendiliğinden yürüyen bir olay olduğunu göstermiştir.

Anahtar Kelimeler:

Silika jel, İzoterm, Kinetik

Adsorption of Methylene Red in Solution on Silica Gel: Equilibrium Isotherm and Kinetic Studies

The aim of this study was to remove methylene red from the aqueous solution. In this study, silicagel was used as adsorbent.The experiments were made with 20 mg adsorbents at different pH (2, 3, 4, 7, 10). The experimental data were analyzed using Langmuir, Freundlich, Dubinin-Radushkevich-Kaganer (DKR),Temkin ve Brunauer-Emmett-Teller (BET) isotherm equations and the constants of these equations were determined. The suitability of 20 mg/L dye solution to Langergren pseudo-first order and pseudo-second order rate equations were tested. Thermodynamic parameter such as change of free energy, entalphy and entropy of adsorption were calculated. As a result, the data obtained indicated that adsorption is a physical, exothermic and spontaneous.

Keywords:

Dyestuff Methyl Red, Isotherm, Kinetic,

PDF

___

[1] Badr Y., El-Wahed M.A., Mahmoud M. Photocatalytic degradation of methyl red dye by silica nanoparticles. 154 245-253, 2008.
[2] Ercan Ö., Deniz S., Yetimoğlu E.K., Aydın A. Degradation of reactive dyes using advanced oxidation method. Clean: Soil, Air, Water, 43 1031-1036, 2015.
[3] Sindelar F.W., Silva L.F., Machado V.R., Santos L.C., Stuelp S. Treatment of effluent from the agate Dyeing industry using photo degradation and electrodialysis processes. Sep. Sci. Technol, 50 142-147, 2015.
[4] Duta A., Visa M. Simultaneous removal of two industrial dyes by adsorption and photocatalysis on a fly-ash TiO2 composite. 306 21-30, 2015.
[5] Nataraj S., Hosamani K., Aminabhavi T. Nanofiltration and reverse osmosis thin film composite membrane module for the removal of dye and salts from the simulated mixtures. Desalination. 249 12-17, 2009.
[6] Khan T.A., Dahiya S., Khan E.A. Removal of direct red 81 from aqueous solution by adsorption onto magnesium oxide-coated kaolinite: isotherm, dynamics and thermodynamic studies. Environ. Prog. Sustain. Energy. 36 45-58, 2017.
[7] Saygı S. Kil Katkılı Poli (Hipe) Adsorban Üzerinde Metil Moru Boyar Maddenin Bilimleri Adsorpsiyonu: Kinetik, İzoterm ve Termodinamik İncelemeler, Yüksek Lisans Tezi, Yıldız Üniversitesi Fen Bilimleri Enstitüsü, İstanbul, 2017.
[8] Donia M.M., Atia A.A., Al-amrani W.A., El-Nahas A. M. Effect of structural properties of acid dyes on their adsorption behaviour from aqueous solutions by amine modified silica.161 1544-1550, 2009.
[9] Vasanth K.K., Sivanesan S. Isotherm parameters for basic dyes onto activated carbon: Comparison of linear and non-linear method. B129 147-150, 2006.
[10] Adamson A.W., Gast A.P. Physical Chemistry of Surfaces, sixth ed, Wiley- Interscience, New York, 1997.
[11] Dabrowski A. Adsorption-from theory to practice. Adv. Colloid Interface (Sci). 93 135-224, 2001.
[12] Sheha R.R., Metwally E. Equilibrium isotherm modeling of cesium adsorption onto magnetic materials.143 354-361, 2007.
[13] Langmuir I. The constitution and fundamental properties of solids and liquids. 38 2221-2295, 1916.
[14] Khattri S.D., Singh M. Adsorption of basic dyes from aqueous solution by natural adsorbent. 6 112-116, 1999.
[15] Freundlich H.M.F. Over the adsorption in solution. 57 385-471, 1906.
[16] Mishra G., Tripathy M.A. Critical Review of The Treatment For Decolorization of Dye Wastewater. Biotechnol. (Adv). 9 613-622, 1993.
[17] Perez M., Torrades F., Domenech X., Peral J.F. Oxidation of Textile Effluents, Water Research. 36 2703-2710, 2002.
[18] Prado A.G.S., Torres J.D., Faria E.A., Dias S.C.L. Comparative Adsorption Studies Of İndigo Carmine Dye on Chitin And Chitosan, Journal of Colloid and İnterface Science. 277 43-47, 2004.
[19] Wong Y.C., Szeto Y.S., Cheung W.H., Mc Kay G. Adsorption Of Acid Dyes On Chitosan-Equilibrium IsothermAnalyses, Process Biochemistry, 39 693-702, 2004.
[20] Sulak M.T., Demirbas E., Kobya M. Removal of astrazon yellow 7GL from Chitosan-Equilibrium Isotherm Analyses, Process Biochemistry. 39 693-702, 2006.
[21] Tsai T., Lai C.W., Su T.Y. Adsorption of Bisphenol-A from Aqueous Solution onto Minerals and Carbon Adsorbats, 2005.
[22] Vadivelan V., Kumar K.V. Equilibrium, Kinetics, Mechanism and Process Design for The Sorption of Methylene Blue onto Rice Husk. J. Colloid Interf. (Sci). 286 90-100, 2005.
[23] Weber W.J., Morris J.C. Preliminary Appraisal of Advanced Waste Treatment Processes. Water Pollut. (Res). 2 231-24, 1963.