Extraction of heavy metals from solid matrices with ligands and supercritical carbon dioxide

Chr Kersch; G. F. Woerlee; G. J. Witkamp

Extraction of heavy metals from solid matrices with ligands and supercritical carbon dioxide

Chr Kersch^*, G. F. Woerlee, G. J. Witkamp

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

1 Scopus citations

Abstract

The extraction efficiency of heavy metals from sand matrices with supercritical carbon dioxide is influenced by a number of process parameters. Cyanex 302 results in efficiencies of greater than 50% for most of the metals. The amount of Cd extracted with Aliquat 336, in combination with NaCl solution, was significantly greater than for all metals tested. (Di-2(ethylhexyl)-phosphoric acid)and (di-isooctylphosphinic acid) are most effective for Zn extraction. In general, Hg was removed from the matrices entirely. High pressure enhances the complex solubility in CO₂, leading to more effective extraction. Highest extraction efficiencies were obtained at water concentrations in the range of 5 wt% to 10 wt%, under which 99% Cd and Cu extraction is obtained.

Original language	English (US)
Pages	161-165
Number of pages	5
State	Published - 1999
Externally published	Yes
Event	Metal Separation Technology Beyond 2000: Integrating Novel Chemistry with Processing - Oahu, HI, USA Duration: Jun 13 1999 → Jun 18 1999

Conference

Conference	Metal Separation Technology Beyond 2000: Integrating Novel Chemistry with Processing
City	Oahu, HI, USA
Period	06/13/99 → 06/18/99

ASJC Scopus subject areas

General Engineering

Cite this

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title = "Extraction of heavy metals from solid matrices with ligands and supercritical carbon dioxide",

abstract = "The extraction efficiency of heavy metals from sand matrices with supercritical carbon dioxide is influenced by a number of process parameters. Cyanex 302 results in efficiencies of greater than 50% for most of the metals. The amount of Cd extracted with Aliquat 336, in combination with NaCl solution, was significantly greater than for all metals tested. (Di-2(ethylhexyl)-phosphoric acid)and (di-isooctylphosphinic acid) are most effective for Zn extraction. In general, Hg was removed from the matrices entirely. High pressure enhances the complex solubility in CO2, leading to more effective extraction. Highest extraction efficiencies were obtained at water concentrations in the range of 5 wt% to 10 wt%, under which 99% Cd and Cu extraction is obtained.",

author = "Chr Kersch and Woerlee, {G. F.} and Witkamp, {G. J.}",

year = "1999",

language = "English (US)",

pages = "161--165",

note = "Metal Separation Technology Beyond 2000: Integrating Novel Chemistry with Processing ; Conference date: 13-06-1999 Through 18-06-1999",

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TY - CONF

T1 - Extraction of heavy metals from solid matrices with ligands and supercritical carbon dioxide

AU - Kersch, Chr

AU - Woerlee, G. F.

AU - Witkamp, G. J.

PY - 1999

Y1 - 1999

N2 - The extraction efficiency of heavy metals from sand matrices with supercritical carbon dioxide is influenced by a number of process parameters. Cyanex 302 results in efficiencies of greater than 50% for most of the metals. The amount of Cd extracted with Aliquat 336, in combination with NaCl solution, was significantly greater than for all metals tested. (Di-2(ethylhexyl)-phosphoric acid)and (di-isooctylphosphinic acid) are most effective for Zn extraction. In general, Hg was removed from the matrices entirely. High pressure enhances the complex solubility in CO2, leading to more effective extraction. Highest extraction efficiencies were obtained at water concentrations in the range of 5 wt% to 10 wt%, under which 99% Cd and Cu extraction is obtained.

AB - The extraction efficiency of heavy metals from sand matrices with supercritical carbon dioxide is influenced by a number of process parameters. Cyanex 302 results in efficiencies of greater than 50% for most of the metals. The amount of Cd extracted with Aliquat 336, in combination with NaCl solution, was significantly greater than for all metals tested. (Di-2(ethylhexyl)-phosphoric acid)and (di-isooctylphosphinic acid) are most effective for Zn extraction. In general, Hg was removed from the matrices entirely. High pressure enhances the complex solubility in CO2, leading to more effective extraction. Highest extraction efficiencies were obtained at water concentrations in the range of 5 wt% to 10 wt%, under which 99% Cd and Cu extraction is obtained.

UR - http://www.scopus.com/inward/record.url?scp=0033298106&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0033298106

SP - 161

EP - 165

T2 - Metal Separation Technology Beyond 2000: Integrating Novel Chemistry with Processing

Y2 - 13 June 1999 through 18 June 1999

ER -

Extraction of heavy metals from solid matrices with ligands and supercritical carbon dioxide

Abstract

Conference

ASJC Scopus subject areas

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