Mercury removal from acidic waste solutions using a thiol functional organo-ceramic adsorbent

K. H. Nam; L. L. Tavlarides

doi:10.1081/SEI-120025932

Mercury removal from acidic waste solutions using a thiol functional organo-ceramic adsorbent

K. H. Nam, L. L. Tavlarides

Department of Biomedical & Chemical Engineering

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

15 Scopus citations

Abstract

Removal of mercury from highly acidic (1-2 M acid concentrations) waste solutions using a novel thiol-functionalized organo-ceramic adsorbent (SOL-AD-IV) has been investigated. The viability of mercury extraction was tested by employing Idaho National Engineering and Environmental Laboratory (INEEL) aluminum calcine and sodium bearing waste (SBW) surrogates. A maximum equilibrium uptake capacity of 740 mg/g in the 1-2 M acid concentrations was found, indicating a 1:1 adsorption ratio between Hg(NO₃)₂⁰ and thiol (SH). Loss of uptake activity due to high contents of aluminum, nitrate, and hydrogen ions was not evident. Over 99.7 wt% extraction efficiency was observed up to 4 M HNO₃ solutions. Rapid kinetics were observed with an extraction efficiency of >91 wt% within 5 min of reaction time. Dynamic adsorption of mercury on a fixed bed demonstrated a removal capacity of 680 mg/g and effluent concentrations as low 0.005 mg/L. Results showed applicability of this material for effective removal of mercury from highly acidic waste solutions.

Original language	English (US)
Pages (from-to)	899-913
Number of pages	15
Journal	Solvent Extraction and Ion Exchange
Volume	21
Issue number	6
DOIs	https://doi.org/10.1081/SEI-120025932
State	Published - Nov 2003

Keywords

Mercury
Removal
Thiol

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1081/SEI-120025932

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title = "Mercury removal from acidic waste solutions using a thiol functional organo-ceramic adsorbent",

abstract = "Removal of mercury from highly acidic (1-2 M acid concentrations) waste solutions using a novel thiol-functionalized organo-ceramic adsorbent (SOL-AD-IV) has been investigated. The viability of mercury extraction was tested by employing Idaho National Engineering and Environmental Laboratory (INEEL) aluminum calcine and sodium bearing waste (SBW) surrogates. A maximum equilibrium uptake capacity of 740 mg/g in the 1-2 M acid concentrations was found, indicating a 1:1 adsorption ratio between Hg(NO3)20 and thiol (SH). Loss of uptake activity due to high contents of aluminum, nitrate, and hydrogen ions was not evident. Over 99.7 wt% extraction efficiency was observed up to 4 M HNO3 solutions. Rapid kinetics were observed with an extraction efficiency of >91 wt% within 5 min of reaction time. Dynamic adsorption of mercury on a fixed bed demonstrated a removal capacity of 680 mg/g and effluent concentrations as low 0.005 mg/L. Results showed applicability of this material for effective removal of mercury from highly acidic waste solutions.",

keywords = "Mercury, Removal, Thiol",

author = "Nam, {K. H.} and Tavlarides, {L. L.}",

note = "Funding Information: The financial support of the U.S. EPA NRMRL through Grant No. GR828570-01-0 and NSF through Grant No. CTS-0120204 are gratefully acknowledged.",

year = "2003",

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doi = "10.1081/SEI-120025932",

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AU - Tavlarides, L. L.

N1 - Funding Information: The financial support of the U.S. EPA NRMRL through Grant No. GR828570-01-0 and NSF through Grant No. CTS-0120204 are gratefully acknowledged.

PY - 2003/11

Y1 - 2003/11

N2 - Removal of mercury from highly acidic (1-2 M acid concentrations) waste solutions using a novel thiol-functionalized organo-ceramic adsorbent (SOL-AD-IV) has been investigated. The viability of mercury extraction was tested by employing Idaho National Engineering and Environmental Laboratory (INEEL) aluminum calcine and sodium bearing waste (SBW) surrogates. A maximum equilibrium uptake capacity of 740 mg/g in the 1-2 M acid concentrations was found, indicating a 1:1 adsorption ratio between Hg(NO3)20 and thiol (SH). Loss of uptake activity due to high contents of aluminum, nitrate, and hydrogen ions was not evident. Over 99.7 wt% extraction efficiency was observed up to 4 M HNO3 solutions. Rapid kinetics were observed with an extraction efficiency of >91 wt% within 5 min of reaction time. Dynamic adsorption of mercury on a fixed bed demonstrated a removal capacity of 680 mg/g and effluent concentrations as low 0.005 mg/L. Results showed applicability of this material for effective removal of mercury from highly acidic waste solutions.

AB - Removal of mercury from highly acidic (1-2 M acid concentrations) waste solutions using a novel thiol-functionalized organo-ceramic adsorbent (SOL-AD-IV) has been investigated. The viability of mercury extraction was tested by employing Idaho National Engineering and Environmental Laboratory (INEEL) aluminum calcine and sodium bearing waste (SBW) surrogates. A maximum equilibrium uptake capacity of 740 mg/g in the 1-2 M acid concentrations was found, indicating a 1:1 adsorption ratio between Hg(NO3)20 and thiol (SH). Loss of uptake activity due to high contents of aluminum, nitrate, and hydrogen ions was not evident. Over 99.7 wt% extraction efficiency was observed up to 4 M HNO3 solutions. Rapid kinetics were observed with an extraction efficiency of >91 wt% within 5 min of reaction time. Dynamic adsorption of mercury on a fixed bed demonstrated a removal capacity of 680 mg/g and effluent concentrations as low 0.005 mg/L. Results showed applicability of this material for effective removal of mercury from highly acidic waste solutions.

KW - Mercury

KW - Removal

KW - Thiol

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Mercury removal from acidic waste solutions using a thiol functional organo-ceramic adsorbent

Abstract

Keywords

ASJC Scopus subject areas

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