Equilibrium Studies for Dye Adsorption onto Red Clay

Year 2022, Volume: 3 Issue: 2, 36 - 45, 27.12.2022

Muhammed Onay , Çiğdem Sarıcı Özdemir

https://doi.org/10.46572/naturengs.1120218

Cited By: 2

Abstract

In this study, it was aimed to remove malachite green, a cationic dye, from aqueous solutions by the adsorption method under various experimental conditions by using red clay. Red clay was used because it is abundant in nature and easily accessible in our region. In addition, it has been preferred as an adsorbent because it is used economically without any pre-treatment. The effects of initial malachite green concentration, temperature, adsorbent amount, and contact time on the adsorption process were evaluated. To examine the percent dye removal effect of the initial malachite green concentration, five different amounts of 25-150 ppm were examined. In order to examine the effect of the amount of red clay on the percentage of dye removal, five different amounts, in the range of 0.5-2 grams, were examined. In order to find the optimum time for the adsorption process, studies were carried out at four different values, 30-120 minutes. In the adsorption process of red clay and malachite green, experiments were carried out at three different degrees as 298, 313 and 333 K. After reaching equilibrium in the adsorption process, the data obtained were analyzed and studies were carried out by applying them to isotherm models. The results obtained from the adsorption process were compared with Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm models. It has been determined that the experimental studies are more compatible with the Dubinin-Radushkevich model. According to the results, it is incompatible with the Langmuir model. Accordingly, it can be said that the adsorption takes place in a multilayer and heterogeneous form.

Keywords

Dye removal, Red clay, Cationic dye, Isotherm

References

• [1] Hamzezadeh, A., Rashtbari, Y., Afshin, S., Morovati, M., & Vosoughi, M. (2022). Application of low-cost material for adsorption of dye from aqueous solution. International Journal of Environmental Analytical Chemistry, 102(1), 254-269.
• [2] Sultana, S., Islam, K., Hasan, M. A., Khan, H. J., Khan, M. A. R., Deb, A., ... & Rahman, M. W. (2022). Adsorption of crystal violet dye by coconut husk powder: isotherm, kinetics and thermodynamics perspectives. Environmental Nanotechnology, Monitoring & Management, 17, 100651.
• [3] Sarıcı Özdemir, Ç. (2019). Equilibrium, kinetic, diffusion and thermodynamic applications for dye adsorption with pine cone. Separation Science and Technology, 54(18), 3046-3054.
• [4] Yagub, M. T., Sen, T. K., Afroze, S., & Ang, H. M. (2014). Dye and its removal from aqueous solution by adsorption: a review. Advances in colloid and interface science, 209, 172-184.
• [5] Salleh, M. A. M., Mahmoud, D. K., Karim, W. A. W. A., & Idris, A. (2011). Cationic and anionic dye adsorption by agricultural solid wastes: a comprehensive review. Desalination, 280(1-3), 1-13.
• [6] Ahmed, M. J. (2016). Application of agricultural based activated carbons by microwave and conventional activations for basic dye adsorption. Journal of Environmental Chemical Engineering, 4(1), 89-99.
• [7] Jawad, A. H., Abdulhameed, A. S., Wilson, L. D., Syed-Hassan, S. S. A., ALOthman, Z. A., & Khan, M. R. (2021). High surface area and mesoporous activated carbon from KOH-activated dragon fruit peels for methylene blue dye adsorption: Optimization and mechanism study. Chinese Journal of Chemical Engineering, 32, 281-290.
• [8] Kausar, A., Iqbal, M., Javed, A., Aftab, K., Bhatti, H. N., & Nouren, S. (2018). Dyes adsorption using clay and modified clay: a review. Journal of Molecular Liquids, 256, 395-407.
• [9] Gadekar, M. R., & Ahammed, M. M. (2019). Modelling dye removal by adsorption onto water treatment residuals using combined response surface methodology-artificial neural network approach. Journal of environmental management, 231, 241-248.
• [10] Kearns, J. P., Wellborn, L. S., Summers, R. S., & Knappe, D. R. U. (2014). 2, 4-D adsorption to biochars: Effect of preparation conditions on equilibrium adsorption capacity and comparison with commercial activated carbon literature data. Water research, 62, 20-28.
• [11] Langmuir, I. (1918). The adsorption of gases on plane surfaces of glass, mica and platinum. Journal of the American Chemical society, 40(9), 1361-1403.
• [12] Freundlich, H. (1907). Über die adsorption in lösungen. Zeitschrift für physikalische Chemie, 57(1), 385-470.
• [13] Dubinin, M. M.; Radushkevich, L. V. (1947). The Equation of Thecharacteristic Curve of Activated Charcoal. Proceedings of the Academy of Sciences. Phys. Chem. Sect., 55, 331–337.
• [14] Temkin, M. J.; Pyzhev, V. (1940). Recent Modifications to Langmuir Isotherms. Acta Phys. Chem., 12, 271–279.