Extraction of metal species from contaminated soils utilizing supercritical CO2 and ultrasound

Ik Beom Park, Younggyu Son, Il Seok Song, Kyung Ho Na, Jongchan Kim, Jeehyeong Khim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The purpose of this study is to identify and evaluate the extraction efficiency of 15 metal species for contaminated soils using supercritical CO2, a chelating agent (Cyanex 272), and ultrasound. The percent extraction of metal species showed in the ascending order of pure CO2 < "CO2 + Cyanex 272" < "CO2 + Cyanex 272 + ultrasound" for most of the metals with the exception of As, Cr, Sb and Se. The supercritical fluid extraction (SFE) of metal ions by pure CO 2 was confirmed to be inefficient but the supercritical CO 2 comprising Cyanex 272 showed a higher extraction rate than that of pure CO2. Ultrasound enhanced/assisted SFE (USFE) with Cyanex 272 could substantially enhance the extraction efficiency from the contaminated soils by facilitating mass transport which helps to move the solubilized metal or metalloid species into the supercritical fluid phase.

Original languageEnglish
Article number07GM17
JournalJapanese journal of applied physics
Volume48
Issue number7 PART 2
DOIs
Publication statusPublished - 2009 Jul

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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