Matthew Otwinowski
Synergetic Technology
The University of Calgary,
Department of Physics and Astronomy, Calgary AB,
Canada T2N 1N4
Synergetic Technology
The University of Calgary,
Department of Physics and Astronomy, Calgary AB,
Canada T2N 1N4
Scaling Analysis Of Acid Rock Drainage
MEND Project 1.19.2
October 1995
REPORT PREPARED FOR
MINE ENVIRONMENT NEUTRAL DRAINAGE PROGRAM
and
ENVIRONMENT CANADA
This work was done on behalf of MEND and sponsored by Environment Canada.
TABLE OF CONTENTS
ACKNOWLEDGEMENTS
EXECUTIVE SUMMARY
RÉSUMÉ
1.0 INTRODUCTION
2.0 OXIDATION OF PYRITE
2.1 Oxidation at pH Between 4 and 7
2.2 Oxidation at pH Less Than 4
3.0 EFFECTIVE KINETIC EQUATIONS FOR THE OXIDATION OF PYRITE
3.1 Scaling Relations for Chemical Reactions
3.2 Scaling Formula for Concentration of Oxygen Dissolved in Water
3.3 Effective Kinetic Equations
3.3.1 pH Between 4 and 7
3.3.2 pH Less Than 4
4.0 SCALING ANALYSIS OF COUPLING BETWEEN CHEMICAL KINETICS AND TRANSPORT PHENOMENA
4.1 Formulation of the Reaction-Transport Model
4.2 Scaling Properties and Sensitivity Analysis of Acid Rock Drainage
4.3 Bifurcations and Thermodynamic Catastrophes in Acid Generation Rates
5.0 PRACTICAL IMPLICATIONS OF PHYSICO-CHEMICAL SCALING RELATIONS
5.1 Alternative Scenarios of Acid Rock Drainage
5.2 Acid Generation Rates
5.3 Required Accuracy of Laboratory and Field Tests
5.4 Discussion of Results
6.0 CONCLUSIONS AND RECOMMENDATIONS
APPENDIX A
APPENDIX B
REFERENCES


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