Removal of Methylene Blue from Aqueous Solution Using Guar Gum g-Poly (Acrylic Acid)/Zeolite Superabsorbent Composite

Author

Musarrat Khan

Abstract

 The present study investigated the removal of methylene blue (MB) dye from aqueous solution using a guar gum-g-poly(acrylic acid)/zeolite superabsorbent composite. Batch adsorption experiments were carried out to study the effects of adsorbent dose, contact time and pH. The residual dye concentration was determined by UV-Visible spectrophotometry. Increasing the adsorbent dose from 0.01 to 0.1 g increased dye removal from 25% to 93%. Increasing contact time from 20 to 200 min increased removal from 20% to 90%. The effect of pH showed maximum methylene blue removal of 92% at pH 10. The Langmuir and Freundlich isotherms were applied to the equilibrium data. The Langmuir plot showed R² = 0.9826, while the Freundlich plot showed R² = 0.9520. From the slope of the Langmuir plot, the calculated maximum adsorption capacity was 5.19 mg/g. The results demonstrate the applicability of the prepared superabsorbent composite for methylene blue removal from aqueous solution.

Keywords

Methylene blue; guar gum; poly(acrylic acid); zeolite; superabsorbent composite; adsorption; Langmuir; Freundlich

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References

Paulino, A. T. et al. (2006). Removal of methylene blue from water using a superabsorbent hydrogel prepared from modified gum arabic, polyacrylate and polyacrylamide.

Wang, Y., Zheng, L., Ren, X., Song, H. and Wang, A. (2010). Journal of Environmental Sciences, 22(1), 7–14.

Kumar, P. S., Ramalingam, S., Senthamarai, C., Niranjana, M., Vijayalakshmi, P. and Sivanesan, S. (2010). Desalination, 261(1–2), 52–60.

Haghseresht, F. and Lu, G. (1998). Adsorption characteristics of phenolic compounds onto coal-reject-derived adsorbents. Energy & Fuels, 12, 1100–1107.

Sokker, H. H., Abdel-Kareem, M., Zohdy, K. and Younes, M. M. (2010). Journal of Radiation Research and Applied Sciences, 3(4), 1107–1124.

Wang, H., Yuan, X. Z., Wu, Z. B. et al. (2014). Removal of basic dye from aqueous solution using Cinnamomum camphora sawdust; kinetics, isotherms, thermodynamics and mass transfer processes. Separation and Purification Technology, 49, 2689–2699.

Weber, T. W. and Chakkravorti, R. K. (1974). Pore and solid diffusion models for fixed-bed adsorbers. AIChE Journal, 20, 228–238.

Zheng, H. and Lu, F. (2011). Food Chemistry, 128(4), 1087–1093.

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