Characterizing the optimal operation of photocatalytic degradation of BDE-209 by nano-sized TiO2

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Ka Lai Chow
  • Yu Bon Man
  • Jin Shu Zheng
  • Yan Liang
  • Ming Hung Wong

Detail(s)

Original languageEnglish
Pages (from-to)1670-1678
Journal / PublicationJournal of Environmental Sciences (China)
Volume24
Issue number9
Publication statusPublished - Sep 2012

Abstract

Brominated flame retardants have been widely used in industry. There is a rapid growing public concern for their availabilities in the environment. Advanced oxidation process (AOP) is a promising and efficient technology which may be used to remove emerging chemicals such as brominated flame retardants. This study aims at investigating optimal operational conditions for the removal of BDE-209 using nano-scaled titanium(IV) oxide. The residual PBDE congeners after photocatalytical degradation of BDE-209 by TiO2 were analysed by gas chromatography-mass spectrometry (GC-MS). It was found that the degradability of BDE-209 by TiO2 was attributed to its photocatalytic activity but not the small size of the particles. The half-life of removing BDE-209 by TiO2 was 3.05 days under visible light. Tetra- and penta-BDEs were the major degraded products of BDE-209. Optimum conditions for photocatalytical degradation of BDE-209 was found to be at pH 12 (93% ± 1%), 5, 10, 20 mg/L (93.0% ± 1.70%, 91.6% ± 3.21%, 91.9% ± 0.952%, respectively), respectively of humic acid and in the form of anatase/rutile TiO2 (82% ± 3%). Hence, the efficiency of removing BDE-209 can be maximized while being cost effective at the said operating conditions. © 2012 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.

Research Area(s)

  • Hydroxyl radicals, PBDEs, Photocatalysis, TiO2

Citation Format(s)

Characterizing the optimal operation of photocatalytic degradation of BDE-209 by nano-sized TiO2. / Chow, Ka Lai; Man, Yu Bon; Zheng, Jin Shu; Liang, Yan; Tam, Nora Fung Yee; Wong, Ming Hung.

In: Journal of Environmental Sciences (China), Vol. 24, No. 9, 09.2012, p. 1670-1678.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal