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

doi:10.1143/JJAP.48.07GM17

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

School of Civil, Environmental and Architectural Engineering

Research output: Contribution to journal › Article › peer-review

8 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 language	English
Article number	07GM17
Journal	Japanese journal of applied physics
Volume	48
Issue number	7 PART 2
DOIs	https://doi.org/10.1143/JJAP.48.07GM17
Publication status	Published - 2009 Jul

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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AU - Son, Younggyu

AU - Song, Il Seok

AU - Na, Kyung Ho

AU - Kim, Jongchan

AU - Khim, Jeehyeong

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

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