Adsorption of Organic Pollutants by Ferric Oxide Modified Montmorillonite

Abstract:

Ferric oxide modified montmorillonite (Fe₂O₃@M) was prepared with the method of microwave-assisted ion-exchange and in-situ precipitation, with Fe₂O₃ nanoparticles intercalated into the interlayer of montmorillonite. Rhodamine B (RhB) was employed as a probe compound to study the adsorption characteristics of organic pollutants with Fe₂O₃@M as the adsorbent. The effect of pH and adsorbent dosage were investigated and the results showed that the maximum of adsorption capacity for RhB was 58.8 mg g^-1. The adsorption capacity of Fe₂O₃@M for RhB was augmented along with the increase of adsorbent dosage. The Fe₂O₃ modified montmorillonite exhibits a much better adsorption capacity in an acidic solution than that in an alkaline solution. The adsorption process was well fitted the Langmuir and Freundlich isotherm model, respectively, and the adsorption reaction kinetics complied with a pseudo second-order kinetics model.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 80-83
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.80
• Online since: June 2014
• Authors: Xiao Long Hu, Ying Ping Huang, Ai Qing Zhang, Xiao Rong Zhao*
• Keywords: Adsorption, Fe₂O₃, Modify, Montmorillonite

References

[1] T.A. Khan, S. Dahiya, and I. Ali, Appl. Clay Sci., 2012. 69: p.58.

[2] H. Guo, X. Jing, L. Zhang, et al., J. Mater. Sci., 2007. 42(16): p.6951.

[3] L. Ong, F. Soetaredjo, A. Kurniawan, et al., Chem. Eng. J., 2014. 241: p.9.

[4] S. -H. Lin and R. -S. Juang, J. Hazard. Mater., 2002. 92(3): p.315.

[5] X. Zhao, L. Zhu, Y. Zhang, et al., J. Hazard. Mater., 2012. 215-216: p.57.

[6] V. Garg, R. Kumar, and R. Gupta, Dyes Pigm., 2004. 62(1): p.1.