Mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal
Mineralogical, bulk and field leachate compositions are used to identify important processes governing the evolution of discharges from a coal spoil heap in County Durham. These processes are incorporated into a numerical one-dimensional advective-kinetic reactive transport model which reproduces fi...
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| Format: | Journal Article |
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The Mineralogical Society
2003
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| Online Access: | http://hdl.handle.net/20.500.11937/21210 |
| _version_ | 1848750526374608896 |
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| author | Evans, Katy Gandy, C. Banwart, S. |
| author_facet | Evans, Katy Gandy, C. Banwart, S. |
| author_sort | Evans, Katy |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Mineralogical, bulk and field leachate compositions are used to identify important processes governing the evolution of discharges from a coal spoil heap in County Durham. These processes are incorporated into a numerical one-dimensional advective-kinetic reactive transport model which reproduces field results, including gas compositions, to within an order of magnitude. Variation of input parameters allows the effects of incorrect initial assumptions on elemental profiles and discharge chemistry to be assessed. Analytical expressions for widths and speeds of kinetic reaction fronts are developed and used to predict long-term development of mineralogical distribution within the heap. Results are consistent with observations from the field site. Pyrite oxidation is expected to dominate O2 consumption in spoilheaps on the decadal timescale, although C oxidation may stabilize contaminants in effluents on the centennial scale. |
| first_indexed | 2025-11-14T07:38:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-21210 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:38:14Z |
| publishDate | 2003 |
| publisher | The Mineralogical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-212102017-09-13T16:01:25Z Mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal Evans, Katy Gandy, C. Banwart, S. redox acid mine drainage reactive transport modelling weathering pyrite dissolution Mineralogical, bulk and field leachate compositions are used to identify important processes governing the evolution of discharges from a coal spoil heap in County Durham. These processes are incorporated into a numerical one-dimensional advective-kinetic reactive transport model which reproduces field results, including gas compositions, to within an order of magnitude. Variation of input parameters allows the effects of incorrect initial assumptions on elemental profiles and discharge chemistry to be assessed. Analytical expressions for widths and speeds of kinetic reaction fronts are developed and used to predict long-term development of mineralogical distribution within the heap. Results are consistent with observations from the field site. Pyrite oxidation is expected to dominate O2 consumption in spoilheaps on the decadal timescale, although C oxidation may stabilize contaminants in effluents on the centennial scale. 2003 Journal Article http://hdl.handle.net/20.500.11937/21210 10.1180/0026461036720107 The Mineralogical Society fulltext |
| spellingShingle | redox acid mine drainage reactive transport modelling weathering pyrite dissolution Evans, Katy Gandy, C. Banwart, S. Mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal |
| title | Mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal |
| title_full | Mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal |
| title_fullStr | Mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal |
| title_full_unstemmed | Mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal |
| title_short | Mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal |
| title_sort | mineralogical, numerical and analytical studies of the coupled oxidation of pyrite and coal |
| topic | redox acid mine drainage reactive transport modelling weathering pyrite dissolution |
| url | http://hdl.handle.net/20.500.11937/21210 |