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Weathering of Pb-Zn mine tailings in pH buffered environment
| Content Provider | Scilit |
|---|---|
| Author | Bertorino, G. Caredda, A. M. Ibba, A. Zuddas, P. |
| Copyright Year | 2021 |
| Description | The Ingurtosu Pb-Zn mine in South-western Sardinia has been recognized as an important target area characterized by the presence of large abandoned ponds in a pH buffering carbonate environment. Three main weathering processes are observed: a) oxidation without acidification derived from Pb and Zn sulphides; b) oxidation with acidification derived from Fe sulphides; c) pH buffering due to Ca and Mg carbonate dissolution. These weathering processes are followed by adsorption of metals on iron oxyhydroxides and precipitation of hydrated sulphates (sometimes carbonates). Microscopic examination and EDS microanalysis have pointed out that nearly all iron sulphides and carbonate (siderite, ankerite) grains, have alteration rims made up of iron oxyhydroxides (goethite), where Zn, Cu and Pb are adsorbed after sulphide oxidation. Moreover, the occurrence of slightly weathered clay minerals confirms that low pH values are never reached. Book Name: Water-Rock Interaction |
| Related Links | https://api.taylorfrancis.com/content/chapters/edit/download?identifierName=doi&identifierValue=10.1201/9780203734049-214&type=chapterpdf |
| Ending Page | 862 |
| Page Count | 4 |
| Starting Page | 859 |
| DOI | 10.1201/9780203734049-214 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2021-07-09 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Water-rock Interaction Acidification Ph Buffering Pb Zn Sulphides Oxyhydroxides |
| Content Type | Text |
| Resource Type | Chapter |
