Prevention of sulfide mineral leaching through covalent coating

K. M. Zaman; C. Chusuei; L. Y. Blue; D. A. Atwood

doi:10.1080/10241220802075723

Prevention of sulfide mineral leaching through covalent coating

K. M. Zaman, C. Chusuei, L. Y. Blue, D. A. Atwood

Chemistry

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

4 Scopus citations

Abstract

The use of benzene-1,3-diamidoethanethiol as a covalent surface coating for the prevention of metal leaching was demonstrated with several sulfide minerals including cinnabar (HgS), pyrite (FeS₂), chalcopyrite (CuFeS₂), covellite (CuS), galena (PbS), realgar (As₄S₄) and sphalerite (ZnS). The minerals were coated with sufficient H₂BDT to bind the surface metals in a 1:1 ratio. Leaching at pH 1, 3 and 7 was then conducted on both treated and untreated minerals. ICP and CVAFS (for mercury) analyses revealed that the coated minerals showed a dramatic reduction in metal leaching as compared to uncoated control samples. X-ray photoelectron spectroscopy indicated the formation of covalent bonds between the sulphur of the ligand and the metals from the minerals.

Original language	English
Pages (from-to)	169-184
Number of pages	16
Journal	Main Group Chemistry
Volume	6
Issue number	3-4
DOIs	https://doi.org/10.1080/10241220802075723
State	Published - Sep 1 2007

Keywords

acid mine drainage
BDT
benzene-1,3-diamidoethanethiol
heavy metals
leaching
mineral processing

ASJC Scopus subject areas

Organic Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1080/10241220802075723

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title = "Prevention of sulfide mineral leaching through covalent coating",

abstract = "The use of benzene-1,3-diamidoethanethiol as a covalent surface coating for the prevention of metal leaching was demonstrated with several sulfide minerals including cinnabar (HgS), pyrite (FeS2), chalcopyrite (CuFeS2), covellite (CuS), galena (PbS), realgar (As4S4) and sphalerite (ZnS). The minerals were coated with sufficient H2BDT to bind the surface metals in a 1:1 ratio. Leaching at pH 1, 3 and 7 was then conducted on both treated and untreated minerals. ICP and CVAFS (for mercury) analyses revealed that the coated minerals showed a dramatic reduction in metal leaching as compared to uncoated control samples. X-ray photoelectron spectroscopy indicated the formation of covalent bonds between the sulphur of the ligand and the metals from the minerals.",

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T1 - Prevention of sulfide mineral leaching through covalent coating

AU - Zaman, K. M.

AU - Chusuei, C.

AU - Blue, L. Y.

AU - Atwood, D. A.

PY - 2007/9/1

Y1 - 2007/9/1

N2 - The use of benzene-1,3-diamidoethanethiol as a covalent surface coating for the prevention of metal leaching was demonstrated with several sulfide minerals including cinnabar (HgS), pyrite (FeS2), chalcopyrite (CuFeS2), covellite (CuS), galena (PbS), realgar (As4S4) and sphalerite (ZnS). The minerals were coated with sufficient H2BDT to bind the surface metals in a 1:1 ratio. Leaching at pH 1, 3 and 7 was then conducted on both treated and untreated minerals. ICP and CVAFS (for mercury) analyses revealed that the coated minerals showed a dramatic reduction in metal leaching as compared to uncoated control samples. X-ray photoelectron spectroscopy indicated the formation of covalent bonds between the sulphur of the ligand and the metals from the minerals.

AB - The use of benzene-1,3-diamidoethanethiol as a covalent surface coating for the prevention of metal leaching was demonstrated with several sulfide minerals including cinnabar (HgS), pyrite (FeS2), chalcopyrite (CuFeS2), covellite (CuS), galena (PbS), realgar (As4S4) and sphalerite (ZnS). The minerals were coated with sufficient H2BDT to bind the surface metals in a 1:1 ratio. Leaching at pH 1, 3 and 7 was then conducted on both treated and untreated minerals. ICP and CVAFS (for mercury) analyses revealed that the coated minerals showed a dramatic reduction in metal leaching as compared to uncoated control samples. X-ray photoelectron spectroscopy indicated the formation of covalent bonds between the sulphur of the ligand and the metals from the minerals.

KW - acid mine drainage

KW - BDT

KW - benzene-1,3-diamidoethanethiol

KW - heavy metals

KW - leaching

KW - mineral processing

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JO - Main Group Chemistry

JF - Main Group Chemistry

IS - 3-4

ER -

Prevention of sulfide mineral leaching through covalent coating

Abstract

Keywords

ASJC Scopus subject areas

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