Degradation of Sodium Dodecyl Benzene Sulfonate by Bentonite, TiO₂, and TiO₂-Bentonite

Abstract:

The photodegradation of organic pollutants by TiO₂ has previously been shown to be efficient, but the TiO₂ particles are typically so fine that they are easily washed away. This problem was solved by forming a complex between TiO₂ and bentonite. Four different photodegradation conditions (i.e., no catalyst, addition of 3 bentonite, addition of 1 TiO₂, and addition of 3 TiO₂-bentonite) were investigated for their degradation efficiencies of 20 mg/l sodium dodecyl benzene sulfonate (SDBS) under ultraviolet light for 6 h. The titanium content of 1 titanium oxide was equal to that of the 3 Ti-bentonite. The results showed that, under the four above conditions, 36.7%, 25.9%, 96.7%, and 99.3%, respectively, of SDBS were degraded in the aqueous solutions. The latter two conditions degraded SDBS more efficiently than the former two conditions. The TiO₂-bentonite complex possessed more advantages than TiO₂ or bentonite alone, making the bentonite an appropriate carrier for TiO₂.

• Periodical: Materials Science Forum (Volumes 743-744)
• Pages: 823-830
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.743-744.823
• Online since: January 2013
• Authors: Shu Yao Wen, Zhan Qing Ma, Min Li Ma, Su Yun Chen, Li Li, Jun Jiang
• Keywords: Degradation, Sodium Dodecyl Benzene Sulfonate (SDBS), TiO₂-Bentonite, Ultraviolet Light

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