Manganese and limestone interactions during mine water treatment
| Autor: | Adarlene M. Silva, Mônica Cristina Teixeira, Versiane Albis Leão, Rosa Malena Fernandes Lima, Flávio Luciano dos Santos Cruz |
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| Rok vydání: | 2009 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Carbonates chemistry.chemical_element Industrial Waste Manganese Mining Calcium Carbonate Water Purification chemistry.chemical_compound Acid mine drainage Environmental Chemistry Water pollution Waste Management and Disposal Effluent Calcite Mine waters Environmental engineering Limestone Pollution chemistry Wastewater Environmental chemistry Carbonate Water treatment Water Pollutants Chemical |
| Zdroj: | Repositório Institucional da UFOP Universidade Federal de Ouro Preto (UFOP) instacron:UFOP |
| ISSN: | 1873-3336 |
| Popis: | Manganese removal from mining-affected waters is an important challenge for the mining industry. Addressed herein is this issue in both batch and continuous conditions. Batch experiments were carried out with synthetic solutions, at 23+/-2 degrees C, initial pH 5.5 and 8.3 g limestone/L. Similarly, continuous tests were performed with a 16.5 mg/L Mn(2+) mine water, at 23 degrees C, initial pH 8.0 and 20.8 g limestone/L. Calcite limestone gave the best results and its fine grinding proved to the most effective parameter for manganese removal. In either synthetic solutions or industrial effluents, the final manganese concentration was below 1 mg/L. A change in limestone surface zeta potential is observed after manganese removal and manganese carbonate formation was suggested by IR spectroscopy. The conclusion is that limestone can remove manganese from industrial effluents for values that comply with environmental regulations. |
| Databáze: | OpenAIRE |
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