Acid production potentials of massive sulfide minerals and lead-zinc mine tailings: a medium-term study
| Autor: | Mehmet Kobya, Mehmet Salim Öncel, Emin Ender Çelebi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Turkey Mineralogy 010501 environmental sciences engineering.material Sulfides 010502 geochemistry & geophysics 01 natural sciences Mining Galena Leachate 0105 earth and related environmental sciences Water Science and Technology Minerals Chemistry Chalcopyrite Volcanogenic massive sulfide ore deposit Oxides Hydrogen-Ion Concentration Tailings Sulfide minerals Zinc Sphalerite visual_art Environmental chemistry engineering visual_art.visual_art_medium Pyrite Acids Environmental Monitoring |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 77(1-2) |
| ISSN: | 0273-1223 |
| Popis: | Weathering of sulfide minerals is a principal source of acid generation. To determine acid-forming potentials of sulfide-bearing materials, two basic approaches named static and kinetic tests are available. Static tests are short-term, and easily undertaken within a few days and in a laboratory. In contrast, kinetic tests are long-term procedures and mostly carried out on site. In this study, experiments were conducted over a medium-term period of 2 months, not as short as static tests and also not as long as kinetic tests. As a result, pH and electrical conductivity oscillations as a function of time, acid-forming potentials and elemental contents of synthetically prepared rainwater leachates of massive sulfides and sulfide-bearing lead–zinc tailings from abandoned and currently used deposition areas have been determined. Although the lowest final pH of 2.70 was obtained in massive pyrite leachate, massive chalcopyrite leachate showed the highest titrable acidity of 1.764 g H2SO4/L. On the other hand, a composite of currently deposited mine tailings showed no acidic characteristic with a final pH of 7.77. The composite abandoned mine tailing leachate had a final pH of 6.70, close to the final pH of massive galena and sphalerite leachates, and produced a slight titrable acidity of 0.130 g H2SO4/L. |
| Databáze: | OpenAIRE |
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