Haneş and Valea Vinului (Romania) closed mines Acid Mine Drainages (AMDs) – Actual condition and passive treatment remediation proposal |
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Authors: | Andrada Măicăneanu Horea Bedelean Marius Ardelean Silvia Burcă Maria Stanca |
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Institution: | 1. Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babe?-Bolyai University, 11 Arany Janos St., RO-400028 Cluj-Napoca, Romania;2. Department of Geology, Faculty of Biology and Geology, Babe?-Bolyai University, 1 M. Kog?lniceanu St., RO-400084 Cluj-Napoca, Romania;3. SC EMERSON SRL, 4 Emerson St., RO-400641 Cluj-Napoca, Romania |
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Abstract: | Acid Mine Drainages (AMDs) from Hane? and Valea Vinului (Romania) closed mines were considered for characterization and treatment using a local zeolitic volcanic tuff, ZVT, (M?cica?, Cluj County, Romania). Water samples were collected from two locations, before and after discharging point in case of Hane? mine, and on three horizons in case of Valea Vinului mine. Physico-chemical (pH, total solid, heavy metal ions concentration) analyses showed that the environment is strongly affected by these AMD discharges even if the mines were closed years ago. Iron, manganese and zinc were the main pollutants identified in Hane? mine AMD, while zinc is the one mainly present in case of Valea Vinului AMD. A batch technique (no stirring) in which the ZVT was put in contact with the AMD sample was proposed as a passive remediation technique. ZVT successfully remove heavy metal ion from AMD. According to heavy metal ion concentrations, removal efficiencies are reaching 100%, varying as follows, Fe2+ > Zn2+ > Mn2+. When the ZVT was compared with two cationic resins (strong, SAR and weak acid, WAR) the following series was depicted, SAR > ZVT > WAR. |
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Keywords: | Acid mine drainage Zeolites volcanic tuff Clinoptilolite Heavy metal removal |
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