Degradation of perchlorate in water using aqueous multivalent titanium

Effect of titanium type, ionic strength, and metal and solid catalysts

Sung Hyuk Park, Bill Batchelor, Chunwoo Lee, Dong Suk Han, Ahmed Abdel-Wahab

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this study, chemical degradation of perchlorate was investigated using partially oxidized titanium ions (Ti(II) and Ti(III)). Results of UV spectra showed that the patterns of absorbance at all ratios of F/Ti(0) were similar each other, except the lowest F/Ti(0) of 0.5 (25mMF -) where mixture of Ti(II) and Ti(III) might be present, resulted in shift of the peak to wavelength of 480nm. The rate of perchlorate degradation was fastest at lowest F/Ti(0) ratio. Among catalysts investigated, only rhenium enhanced the perchlorate degradation in the presence of Ti(II), but no effect of catalysts in Ti(III). In addition, high ionic strength did not enhance the perchlorate-Ti(III) reaction, but high acid concentration did. Addition of solid acid catalysts (SACs) to Ti(III) solution showed slower perchlorate degradation, probably due to decrease in Ti(III) concentration by adsorption onto SAC. Rate constants for perchlorate degradation in Ti(III) were twofold higher than in Ti(II) when 5N HCl used.

Original languageEnglish
Pages (from-to)128-133
Number of pages6
JournalJournal of Colloid and Interface Science
Volume380
Issue number1
DOIs
Publication statusPublished - 15 Aug 2012

Fingerprint

Titanium
Ionic strength
Metals
Degradation
Catalysts
Water
Acids
Rhenium
Rate constants
perchlorate
Adsorption
Wavelength
Ions

Keywords

  • Catalyst
  • Kinetic model
  • Perchlorate
  • Reduction
  • Titanium

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Cite this

Degradation of perchlorate in water using aqueous multivalent titanium : Effect of titanium type, ionic strength, and metal and solid catalysts. / Park, Sung Hyuk; Batchelor, Bill; Lee, Chunwoo; Han, Dong Suk; Abdel-Wahab, Ahmed.

In: Journal of Colloid and Interface Science, Vol. 380, No. 1, 15.08.2012, p. 128-133.

Research output: Contribution to journalArticle

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N2 - In this study, chemical degradation of perchlorate was investigated using partially oxidized titanium ions (Ti(II) and Ti(III)). Results of UV spectra showed that the patterns of absorbance at all ratios of F/Ti(0) were similar each other, except the lowest F/Ti(0) of 0.5 (25mMF -) where mixture of Ti(II) and Ti(III) might be present, resulted in shift of the peak to wavelength of 480nm. The rate of perchlorate degradation was fastest at lowest F/Ti(0) ratio. Among catalysts investigated, only rhenium enhanced the perchlorate degradation in the presence of Ti(II), but no effect of catalysts in Ti(III). In addition, high ionic strength did not enhance the perchlorate-Ti(III) reaction, but high acid concentration did. Addition of solid acid catalysts (SACs) to Ti(III) solution showed slower perchlorate degradation, probably due to decrease in Ti(III) concentration by adsorption onto SAC. Rate constants for perchlorate degradation in Ti(III) were twofold higher than in Ti(II) when 5N HCl used.

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