Photocatalytic degradation of anionic surfactant in titanium dioxide suspension

Erzsébet Szabó-Bárdos, Zoltán Zsilák, Ottó Horváth

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Citations (Scopus)

Abstract

In TiO2-based photocatalytic degradation of an anionic detergent (lauryl benzenesulfonate) initial pH of 5.0 proved to be most appropriate for high efficiency of surfactant conversion, although lower pHs were more favorable for the adsorption on the surface of the catalyst. A catalyst concentration of 1 g dm-3 was optimum for the mineralization of this pollutant. After decreasing the surfactant concentration below the limit of foaming in a closed photo-reactor utilizing H2O2 as electron acceptor, total mineralization of the pollutant could be achieved by a longer-time irradiation in a second, air-bubbled reactor. The activity of the photocatalyst proved to be constant even after several reusages. The temperature increase promoted the photoassisted degradation of the anionic detergent in the range of 20-50°C measured in a home-built pilot equipment. The progress of mineralization became faster only after the conversion of surfactant reached 80-85%. There was found an optimum concentration of the oxidizer, H2O2, above which the efficiency of degradation could not be significantly enhanced.

Original languageEnglish
Title of host publicationColloids for Nano- and Biotechnology
EditorsZoltan Horvolgyi, Eva Kiss
Pages21-28
Number of pages8
DOIs
Publication statusPublished - Dec 1 2008

Publication series

NameProgress in Colloid and Polymer Science
Volume135
ISSN (Print)0340-255X

Keywords

  • Detergent
  • Mineralization
  • Photocatalysis
  • Titanium dioxide
  • Wastewater treatment

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

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  • Cite this

    Szabó-Bárdos, E., Zsilák, Z., & Horváth, O. (2008). Photocatalytic degradation of anionic surfactant in titanium dioxide suspension. In Z. Horvolgyi, & E. Kiss (Eds.), Colloids for Nano- and Biotechnology (pp. 21-28). (Progress in Colloid and Polymer Science; Vol. 135). https://doi.org/10.1007/2882-2008-096