The Adsorption Mechanism of Sodium Lignosulfonate on Al₂O₃ Particle in the Aqueous Solution

Abstract:

The adsorption properties of sodium lignosulfonate (SL) on Al₂O₃ particles under different pH values have been investigated. Results show that at low pHs, SL adsorbs on the Al₂O₃ particles in the form of aggregate as dosage of SL increases; at high pHs, the adsorption is approximately monolayer coverage. With pH values ranging from 3 to 11, the adsorption results are found to be not significantly affected by the addition of urea, ruling out the hydrogen bond as the controlling factor. The paper demonstrates that the main driving force of adsorption is considered as the synergistic effect of electrostatic and hydrophobic interactions when pH pHIEP with additives of Na₂SO₄ and NaCl.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 1120-1123
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.1120
• Online since: July 2012
• Authors: Rong Li, Dong Jie Yang, Wen Yuan Guo, Xue Qing Qiu
• Keywords: Adsorption Driving Force, Al₂O₃, pH, Salt, Sodium Lignosulfonate, Urea

References

[1] R.K. Rath, S. Subramanian, Miner. Eng. Vol.10 (1997), p.1405

[2] R.K. Rath, S. Subramanian, J. Laskowski, Langmuir Vol.13 (1997), p.6260

[3] J. Wang, P. Somasundaran, D. Nagaraj, Miner. Eng. Vol.18 (2005), p.77

[4] M. Yan, D. Yang, Y. Deng, P. Chen, H. Zhou, X. Qiu, Colloids Surf., A: Physicochem. Eng. Aspects Vol.371 (2010) , p.50

[5] D. Goring, R. Vuong, C. Gancet, H. Chanzy, J.Appl. Polym. Sci. Vol. 24 (1979), p.931