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- Title
Controlling Acid Drainage in a Pyritic Mine Waste Rock. Part I: Statistical Analysis of Drainage Data.
- Authors
Yanful, Ernest K.; Orlandea, Marcela P.; Eliasziw, Michael
- Abstract
Field experiments were conducted to evaluate the relative effectiveness of several covers and amendment techniques for preventing or controlling acid generation in a pyritic mine waste rock. The covers and techniques consisted of water cover, soil cover, wood bark cover, limestone addition and phosphate rock addition. Water quality data (pH, sulphate, zinc and iron concentrations) obtained from the experiments were analyzed using two-way ANOVA (analysis of variance) with repeated measurements. A 5% test of significance (p-value of 0.05) was used in the analysis. The results suggested that the covers and amendments should be either compared on a time-by-time basis or grouped into four, based on their performance: (i) water cover, (ii) 1% and 3% limestone, (iii) clay, 1% and 3% PO4, and control (no cover), and (iv) wood bark. The results did not show any significant difference between the drainage quality from 1% and 3% limestone-amended rocks. The drainage quality from the 1% and 3% phosphate and clay-covered rocks did not significantly differ from the control (unamended) rock. Water cover was found to be the most effective, while the wood bark cover proved to be an ineffective method for controlling acid drainage in the waste rock. The statistical analysis also showed good replication in the experiments, as no significant difference in the quality of the drainage from the replicates was observed.
- Subjects
MINE drainage; SOIL composition; ACIDS; PYRITES; SULFIDE minerals; WATER quality monitoring; HYDROGEN-ion concentration; ANALYSIS of variance
- Publication
Water, Air & Soil Pollution, 2000, Vol 122, Issue 3-4, p369
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1023/A:1005278625301