Removal of tetrafluoroborate ion from aqueous solution using magnesium-aluminum oxide produced by the thermal decomposition of a hydrotalcite-like compound

Toshiaki Yoshioka, Tomohito Kameda, Motoya Miyahara, Miho Uchida, Tadaaki Mizoguchi, Akitsugu Okuwaki

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Magnesium-aluminum oxide (Mg-Al oxide) prepared by the thermal decomposition of a hydrotalcite-like compound was found to have potential for treating NaBF4 wastewater. The Mg-Al oxide removed the BF4- and F- and H3BO3 from the NaBF4 solution. With increasing Mg-Al oxide quantity and time, the BF4- concentration decreased and the degree of BF4-, F-, and boron removal increased. The decrease in the BF4- concentration resulted from uptake by the Mg-Al oxide and not hydrolysis. The Mg-Al oxide took up F- from the solution preferentially. The Mg-Al oxide also converted the H3BO3 in the aqueous solution into H2 BO3-, which it took up.

Original languageEnglish
Pages (from-to)832-835
Number of pages4
JournalChemosphere
Volume69
Issue number5
DOIs
Publication statusPublished - 2007 Oct

Keywords

  • Borate
  • Fluoride
  • Hydrotalcite-like compound
  • Magnesium-aluminum oxide
  • Removal
  • Tetrafluoroborate

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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