Recovery of Iron and Aluminum from Acid Mine Drainage by Selective Precipitation
- 1 November 2005
- journal article
- research article
- Published by Mary Ann Liebert Inc in Environmental Engineering Science
- Vol. 22 (6), 745-755
- https://doi.org/10.1089/ees.2005.22.745
Abstract
The large volumes of sludge produced through the active treatment of acid mine drainage (AMD) require further processing and final disposal. AMD sludge typically contains a heterogeneous mixture of iron, aluminum, magnesium, and calcium oxides/hydroxides that are of little to no practical value. However, purified iron and aluminum hydroxides have potential commercial value. Based on the solubility of the major dissolved metals, a two-step selective precipitation process was developed to recover high purity iron and aluminum as separate hydroxide products through the manipulation of current AMD treatment operations. The recommended pH for iron precipitation was pH 3.5–4.0 with precipitate purity >93.4% and iron recovery >98.6%. AMD water after iron removal was used as source water for aluminum recovery. Aluminum precipitated best at pH 6.0–7.0 with aluminum recovery >97.2% and precipitate purity >92.1%.Keywords
This publication has 12 references indexed in Scilit:
- RECOVERY OF URANIUM FROM ACID MINE DRAINAGE WATERS BY ION EXCHANGEMineral Processing and Extractive Metallurgy Review, 2004
- The extraction of Fe(III) using cation-exchange carboxylic resinsHydrometallurgy, 2004
- Chemical precipitation of heavy metals from acid mine drainageWater Research, 2002
- Electrochemical Treatment of Acidic Aqueous Ferrous Sulfate and Copper Sulfate as Models for Acid Mine DrainageWater Research, 2001
- Bacterial ferrous iron oxidation of acid mine drainage as pre-treatment for subsequent metal recoveryInternational Journal of Mineral Processing, 2001
- Treatment by sulfate-reducing bacteria of Chessy acid-mine drainage and metals recoveryChemical Engineering Science, 2001
- Ferrous oxidation chemistry in passive abiotic systems for the treatment of mine drainageGeochemistry: Exploration, Environment, Analysis, 2001
- Lithic controls on the removal of iron and remediation of acidic mine drainageWater Research, 2000
- An adsorption process for metal recovery from acid mine waste: The Berkeley Pit problemEnvironmental Progress, 1998
- Recovery of valuable metals from acid mine drainage by selective titrationWater Research, 1983