Removal of SO2 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 journalArticlepeer-review

8 Citations (Scopus)

Abstract

Although effective treatments of SOx 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 SO2 from waste streams using a Mg-Al oxide slurry. The ability of the mixed oxide to remove SO2 increased with slurry quantity and temperature but decreased with time. SO2 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 H2SO3 upon dissolution of SO2 in the slurry. SO2 was not adsorbed onto the surface of the Mg-Al oxide. These results suggest that SO2 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

Keywords

  • Intercalation
  • Mg-Al oxide slurry
  • Treatment

ASJC Scopus subject areas

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

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