Study on the aggregation behavior of kaolinite particles in the presence of cationic, anionic and non-ionic surfactants

PloS One
Lingyun LiuFangqin Lu

Abstract

Aggregation behaviors of kaolinite particles with different surfactants were studied in this paper. Aggregation settling yield and fractal dimension analysis were used to determine the aggregation results. Zeta potential measurements, adsorption tests, Infrared spectroscopy analysis and scanning electron microscope measurements were conducted for further investigation into the mechanism. Experimental results showed that much better aggregation results was obtained in the presence of cationic surfactant than that in the presence of anionic and non-ionic surfactants. 98% aggregation setting yield was obtained in the presence of dodecylamine. Adsorption tests indicated that the adsorption capacity of dodecylamine on kaolinite surface was larger than that of sodium oleate and Tween80. Zeta potential measurements confirmed that dodecylamine was more beneficial to the aggregation of kaolinite particles. Infrared spectroscopy analysis revealed that the adsorption of dodecylamine on kaolinite surface was attributed to electrostatic and hydrogen-bonding interactions. Sodium oleate was adsorbed by chemical adsorption. However, Tween80 can hardly be adsorbed by kaolinite surface.

References

Jul 14, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Alan D BraemBjörn Lindman
Dec 21, 2010·International Journal of Phytoremediation·Mylor Ngoy ShutchaPierre Meerts
Feb 16, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Jun ChenFangqin Lu

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Citations

Oct 9, 2020·Environmental Science and Pollution Research International·Mamoun FellahAleksei Obrosov

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Methods Mentioned

BETA
Infrared spectroscopy
X-ray

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