- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- Tailings and Mine Waste Conference /
- Application of high-resolution microscopy methods to...
Open Collections
Tailings and Mine Waste Conference
Application of high-resolution microscopy methods to the analysis of fine-grained and amorphous treatment sludges Martin, Alan J.; Fawcett, Skya; Kulczycki, Ezra; Loomer, Diana; Al, Tom; Rollo, Andrew
Abstract
Lime addition is a common method for the treatment of acid mine drainage (AMD) whereby neutralization promotes a reduction in acidity and the precipitation of metals as voluminous sludges that may contain gypsum, calcite and a spectrum of other phases. Due to the extremely fine-grained and often amorphous (i.e., non crystalline) character of sludge solids, the composition of these materials has been difficult to elucidate. Traditional methods, such as X-Ray Diffraction (XRD) and optical microscopy, have proved largely ineffective. In order to provide further insight into the solid-phase characterization of neutralization sludges, samples from mine sites across Canada were examined by high resolution microscopy techniques, including Scanning Electron Microscopy (SEM), Scanning Transmission Electron Microscopy (STEM), and X-ray Absorption Spectroscopy (XAS). The results revealed sludge-specific host phases, including relatively pure Feoxyhydroxide, amorphous Mg-Al-(Fe) hydroxysulphate and amorphous metal hydroxides. The data indicate that the nature of metal phase associations is strongly dependent on AMD influent composition.[All papers were considered for technical and language appropriateness by the organizing committee.]
Item Metadata
Title |
Application of high-resolution microscopy methods to the analysis of fine-grained and amorphous treatment sludges
|
Creator | |
Contributor | |
Date Issued |
2011-11
|
Description |
Lime addition is a common method for the treatment of acid mine drainage (AMD) whereby neutralization
promotes a reduction in acidity and the precipitation of metals as voluminous sludges that may contain gypsum,
calcite and a spectrum of other phases. Due to the extremely fine-grained and often amorphous (i.e., non
crystalline) character of sludge solids, the composition of these materials has been difficult to elucidate.
Traditional methods, such as X-Ray Diffraction (XRD) and optical microscopy, have proved largely ineffective.
In order to provide further insight into the solid-phase characterization of neutralization sludges, samples from
mine sites across Canada were examined by high resolution microscopy techniques, including Scanning
Electron Microscopy (SEM), Scanning Transmission Electron Microscopy (STEM), and X-ray Absorption
Spectroscopy (XAS). The results revealed sludge-specific host phases, including relatively pure Feoxyhydroxide,
amorphous Mg-Al-(Fe) hydroxysulphate and amorphous metal hydroxides. The data indicate
that the nature of metal phase associations is strongly dependent on AMD influent composition.[All papers were considered for technical and language appropriateness by the organizing committee.]
|
Genre | |
Type | |
Language |
eng
|
Date Available |
2011-11-04
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
|
DOI |
10.14288/1.0107744
|
URI | |
Affiliation | |
Peer Review Status |
Unreviewed
|
Scholarly Level |
Other
|
Rights URI | |
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International