The removal of chloride from solutions with various cations using magnesium-aluminum oxide

Tomohito Kameda, Toshiaki Yoshioka, Tatsunosuke Hoshi, Miho Uchida, Akitsugu Okuwaki

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

We investigated the removal of chloride from various solutions (NaCl, HCl, MgCl2, AlCl3, CaCl2, and NH4Cl) at 60 °C for 3 h using magnesium-aluminum oxide, Mg0.80Al 0.20O1.10, prepared by the thermal decomposition of a hydrotalcite-like compound, Mg0.80Al0.20(OH) 2(CO3)0.10·0.78H2O. The degree of Cl- removal from solution increased with the amount of Mg0.80Al0.20O1.10 used. When Mg 0.80Al0.20O1.10 was added to 0.5 M Cl - solutions of HCl, MgCl2, AlCl3, and NH 4Cl in a Mg0.80Al0.20O1.10/Cl - molar ratio of 8.75, the degree of Cl- removal exceeded 95%. The degree of Cl- removal from NaCl and CaCl2 solutions was slightly lower, approximately 80 and 90%, respectively. These results reveal that both the amount of Mg0.80Al0.20O 1.10 added to chloride solution and the nature of the cations in the solution affect the efficiency of Cl- removal from solution.

Original languageEnglish
Pages (from-to)25-29
Number of pages5
JournalSeparation and Purification Technology
Volume42
Issue number1
DOIs
Publication statusPublished - 2005 Mar 1

Keywords

  • Buffering action
  • Chloride solution
  • Hydrotalcite-like compound
  • Magnesium-aluminum oxide
  • Removal of chloride

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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