Degradation of n-butyl benzyl phthalate using TiO2/UV

Xiang Rong Xu, Shen Xin Li, Xiao Yan Li, Ji Dong Gu, Feng Chen, Xiang Zhong Li, Hua Bin Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

n-Butyl benzyl phthalate (BBP) has been classified as endocrine disrupting compound and priority pollutant. Effects of TiO2 dosage, pH, initial BBP concentration and co-existing substances on the degradation of BBP by TiO2/UV process were investigated. The optimal TiO2 dosage and pH value for the BBP degradation were 2.0 g L-1 and 7.0, respectively. The degradation rate of BBP by TiO2/UV process could be fitted pseudo-first-order kinetics. The effects of co-existing substances on the degradation rate of BBP revealed that some anions (such as BrO3-, ClO4- and Cr2O72-) could enhance BBP degradation, and other anions would restrain BBP degradation. The sequence of inhibition was PO43- > CO32- > NO3- > SO42- > Cl-. The cations K+, Na+, Mg2+ and Ca2+ had the restrained effect on the BBP degradation, and the effect of Ca2+ was the strongest among four cations tested. The organic compounds acetone and methanol decreased the degradation rate of BBP. The major intermediates of BBP degradation were identified as mono-butyl phthalate, mono-benzyl phthalate and phthalic acid, and a primary degradation mechanism was proposed.

Original languageEnglish
Pages (from-to)527-532
Number of pages6
JournalJournal of Hazardous Materials
Volume164
Issue number2-3
DOIs
StatePublished - 30 May 2009
Externally publishedYes

Keywords

  • Degradation
  • Kinetics
  • Mechanism
  • n-Butyl benzyl phthalate
  • Photocatalysis

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