The simultaneous removal of calcium and chloride ions from calcium chloride solution using magnesium-aluminum oxide

Tomohito Kameda, Toshiaki Yoshioka, Teruhisa Mitsuhashi, Miho Uchida, Akitsugu Okuwaki

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

We investigated the removal of Ca2+ and Cl- from CaCl2 solution at 20-60°C, using magnesium-aluminum oxide, Mg0.80Al0.20O1.10, prepared by the thermal decomposition of a hydrotalcite-like compound, Mg0.80Al0.20(OH)2(CO3) 0.10·0.78H2O. The degree of Ca2+ and Cl- removal from the solution increased with increasing initial CaCl2 concentration, temperature, and quantity of Mg0.80Al0.20O1.10 added. When Mg0.80Al0.20O1.10 was added to 0.25M CaCl2 solution in a Mg0.80Al0.20O1.10/CaCl2 molar ratio of 20, the degree of Ca2+ and Cl- removal from the solution at 60°C after 0.5h was 93.0% and 98.2%, respectively. These results reveal that Mg0.80Al0.20O1.10 has the capacity to remove Ca2+ and Cl- simultaneously from aqueous solution.

Original languageEnglish
Pages (from-to)4045-4050
Number of pages6
JournalWater Research
Volume37
Issue number16
DOIs
Publication statusPublished - 2003 Sep

Keywords

  • Buffering action
  • CaCl solution
  • Hydrotalcite-like compound
  • Magnesium-aluminum oxide
  • Removal
  • Simultaneous

ASJC Scopus subject areas

  • Ecological Modelling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

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