Journal
JOURNAL OF RAMAN SPECTROSCOPY
Volume 42, Issue 2, Pages 224-229Publisher
WILEY
DOI: 10.1002/jrs.2680
Keywords
Raman spectroscopy; hydrotalcite; vanadate; arsenate; inductively coupled optical emission spectroscopy
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Funding
- Queensland Research and Development Centre (RioTintoAlcan)
- Queensland University of Technology, School of Physical and Chemical Sciences
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Hydrotalcites have been synthesised using solutions of three different pH values to assess the effect of pH on the uptake of arsenate and vanadate. The ability of these hydrotalcites to remove vanadate and arsenate from solution has been determined by inductively coupled optical emission spectroscopy. Raman spectroscopy was used to monitor changes in the anionic species for hydrotalcites synthesised at different pH values. The results show a reduction in the concentration of arsenate and vanadate anions that are removed in extremely alkaline solutions. Hydrotalcites containing arsenate and vanadate are stable in solutions up to pH 10. Exposure of these hydrotalcites to higher pH values results in the removal of large percentages of arsenate and vanadate from the hydrotalcite interlayer. Copyright (C) 2010 John Wiley & Sons, Ltd.
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