Removal of SO 2 with a Mg-Al oxide slurry via reconstruction of a Mg-Al layered double hydroxide

Tomohito Kameda, Aki Kodama, Yuki Fubasami, Shogo Kumagai, Toshiaki Yoshioka

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Although effective treatments of SO x are essential for preventing air pollution, current methods pose other environmental problems such as increased amounts of desulfurized gypsum and reduced landfill lifetimes. We report a process for removing SO 2 from waste streams using a Mg-Al oxide slurry. The ability of the mixed oxide to remove SO 2 increased with slurry quantity and temperature but decreased with time. SO 2 was removed through the reconstruction of a Mg-Al layered double hydroxide (Mg-Al LDH) intercalated with SO32-, which was derived from the dissociation of H 2SO 3 upon dissolution of SO 2 in the slurry. SO 2 was not adsorbed onto the surface of the Mg-Al oxide. These results suggest that SO 2 removal using a Mg-Al oxide slurry may be possible without the concomitant problems of conventional treatment methods.

Original languageEnglish
Pages (from-to)250-254
Number of pages5
JournalChemosphere
Volume88
Issue number2
DOIs
Publication statusPublished - 2012 Jun 1

Keywords

  • Intercalation
  • Mg-Al oxide slurry
  • SO
  • Treatment

ASJC Scopus subject areas

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

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