|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Development of an Iron Solvent Extraction and Aluminium Precipitation Process for the Recovery of Poly-Alumino–Ferric Sulphate Coagulant From Acid Mine Drainage
||Brian Mwewa, Sehliselo Ndlovu, Geoffrey Simate
|On-Site Speaker (Planned)
The wastes generated from coal and metal mines, such as acid mine drainage (AMD) are an environmental concern. However, opportunities are available to recover valuable resources from AMD. This approach combines creating revenue with environmental sustainability.
This study examines the potential of producing a poly-alumino-iron sulphate coagulant from AMD solution, via iron (III) solvent extraction (SX) followed by aluminium precipitation processes. The extraction of iron from an AMD solution by Cyanex 272 in kerosene has been studied under different conditions such as pH, temperature, contact time and O/A ratio. The stripping of iron using sulphuric acid has also been evaluated. The iron SX step was followed by the precipitation of aluminium from the raffinate solution using calcium hydroxide at a pH of 5. The dissolution of the aluminium precipitate using the stripping solution from the iron SX process to produce the poly-alumino-ferric sulphate coagulant has also been evaluated.
||Planned: At-meeting proceedings