ODM: an analytical solution-based tool for reacting oxygen diffusion modelling in mine spoils
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- 作者：Saeed Bahrami ; Faramarz Doulati Ardejani
- 关键词：Acid mine drainage ; Mine tailings ; Mine waste ; Pyrite oxidation ; Bacterial activity ; MATLAB GUI
- 刊名：Environmental Earth Sciences
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：76
- 期：2
- 全文大小：
- 刊物类别：Earth and Environmental Science
- 刊物主题：Geology; Hydrology/Water Resources; Geochemistry; Environmental Science and Engineering; Terrestrial Pollution; Biogeosciences;
- 出版者：Springer Berlin Heidelberg
- ISSN：1866-6299
- 卷排序：76
文摘
A simple one-dimensional analytical solution is presented to model oxygen diffusion through the pore space of mine spoils containing pyrite. The model incorporates volumetric oxygen consumption terms due to pyrite oxidation, oxidation of Fe2+ to Fe3+ and bacterial activity. Based on this analytical solution, a graphical user interface (GUI) tool is programmed and designed in MATLAB software. This tool can be used to model transport of oxygen through the mine spoils either with or without a cap. Results of several simulation scenarios of sensitivity analysis showed a significant change in oxygen concentration with varying effective diffusion coefficient of oxygen transport model and simulation time. Efficiency and flexibility of the tool developed here is verified by modelling oxygen transport through the pore space of a coal waste pile (case A) and a copper mine tailings (case B). Maximum depth of oxygen diffusion is obtained approximately equal to 2 and 1.5 m through the cases A and B, respectively.