Kinetics and Isotherm Studies of Methyl Orange Adsorption Using Polyethyleneimine-Graphene Oxide Polymer Nanocomposite Beads

Abstract:

Nanocomposite beads containing 2% chitosan (CS), 2% polyethyleneimine (PEI), and 1,500 ppm graphene oxide (GO) were synthesized for the removal of methyl orange (MO) from water. Characterization of the CS-PEI-GO beads using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) showed favorable adsorbent properties as given by the presence of numerous surface functional groups and a porous structure. Effects of different parameters such as pH, contact time, and initial concentration on the percentage removal of MO and adsorption capacity of the beads were investigated by performing batch adsorption experiments. MO removal of more than 85% was achieved by the beads across a wide pH range. Kinetic studies were performed and a pseudo-second order kinetic equation with R² of 0.9999 was obtained. Furthermore, adsorption equilibrium data for MO were best described by the Toth isotherm model (R² = 0.9644), suggesting multilayer adsorption on heterogeneous adsorption sites with a maximum adsorption capacity of 421.51 mg/g. Finally, FTIR and SEM analyses after adsorption confirmed the presence of MO on the surface of the beads and revealed an intact and stable structure. Overall, the excellent adsorption capability and multi-functionality demonstrated in this study show great potential of the synthesized material for wastewater treatment applications.

• Periodical: Key Engineering Materials (Volume 801)
• Pages: 304-310
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.801.304
• Online since: May 2019
• Authors: Jirah Emmanuel T. Nolasco, Elaine Nicole O. Cañeba, Karl Michael V. Edquila, Joel Ian C. Espita, Jem Valerie D. Perez*
• Keywords: Adsorption, Chitosan, Graphene Oxide, Kinetics, Methyl Orange, Nanocomposite Beads, Polyethyleneimine

References

[1] El Hassani, K., Beakou, B. H., Kalnina, D., Oukani, E., & Anouar, A. (2017). Effect of morphological properties of layered double hydroxides on adsorption of azo dye methyl orange: a comparative study. Applied Clay Science, 140, 124-131.

DOI: 10.1016/j.clay.2017.02.010

[2] Carmen, Z., & Daniela, S. (2012). Textile organic dyes–characteristics, polluting effects and separation/elimination procedures from industrial effluents–a critical overview. In Organic pollutants ten years after the Stockholm convention-environmental and analytical update. InTech.

DOI: 10.5772/32373

[3] Fan, J., Guo, Y., Wang, J., & Fan, M. (2009). Rapid decolorization of azo dye methyl orange in aqueous solution by nanoscale zerovalent iron particles. Journal of Hazardous Materials, 166(2-3), 904-910.

DOI: 10.1016/j.jhazmat.2008.11.091

[4] Allouche, F. N., Yassaa, N., & Lounici, H. (2015). Sorption of methyl orange from aqueous solution on chitosan biomass. Procedia Earth and Planetary Science, 15, 596-601.

DOI: 10.1016/j.proeps.2015.08.109

[5] Chen, S., Yue, Q., Gao, B., Li, Q., Xu, X., & Fu, K. (2012). Adsorption of hexavalent chromium from aqueous solution by modified corn stalk: A fixed-bed column study. Bioresource Technology, 113, 114–120. https://doi.org/10.1016/j.biortech.2011.11.110.

DOI: 10.1016/j.biortech.2011.11.110

[6] Fu, F., & Wang Q. (2011). Removal of heavy metal ions from wastewaters: A review. Journal of Environmental Management, 92(3), 407–418. https://doi.org/10.1016/j.jenvman.2010.11.011.

DOI: 10.1016/j.jenvman.2010.11.011

[7] Perez, J. V. D., Nadres, E. T., Nguyen, H. N., Dalida, M. L. P., & Rodrigues, D. F. (2017). Response surface methodology as a powerful tool to optimize the synthesis of polymer-based graphene oxide nanocomposites for simultaneous removal of cationic and anionic heavy metal contaminants. RSC Adv., 7(30), 18480-18490. https://doi.org/10.1039/C7RA00750G.

DOI: 10.1039/c7ra00750g

[8] Basahel, S., Ali, T., Mokhtar, M., Narasimharao, K. (2015). Influence of crystal structure of nanosized ZrO2 on photocatalytic degradation of methyl orange. Nanoscale Research Letters 10(73). DOI 10.1186/s11671-015-0780-z.

DOI: 10.1186/s11671-015-0780-z

[9] Setshedi, K. Z., Bhaumik, M., Onyango, M. S., & Maity, A. (2015). High-performance towards Cr(VI) removal using multi-active sites of polypyrrole-graphene oxide nanocomposites: Batch and column studies. Chemical Engineering Journal, 262, 921–931. https://doi.org/10.1016/j.cej.2014.10.034.

DOI: 10.1016/j.cej.2014.10.034

[10] Jiang, Y., Liu, B., Xu, J., Pan, K., Hou, H., Hu, J., Yang, J. (2018). Cross-linked chitosan/B-cyclodextrin composite for selective removal of methyl orange: Adsorption performance and mechanism. Carbohydrate Polymers 182 (2018) 106-114. http://dx.doi.org/10.1016/ j.carbpol.2017.10.097.

DOI: 10.1016/j.carbpol.2017.10.097