Journal
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
Volume 38, Issue 3, Pages 162-167Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/08827508.2017.1281131
Keywords
Acidic mine drainage; sulfate reduction; metal precipitation; selective metal precipitation
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Sulfide produced in an ethanol fed anaerobic baffled reactor, was utilized to precipitate metals separately in a pH controlled system. Sulfide produced in the reactor (780 +/- 27 mg/L S2-) was transported with N-2 gas to the metal precipitation chamber at pH 2.5 to precipitate Cu2+ separately from Fe2+. Cu precipitation was completed at 98% efficiency within 5 min. The remaining Fe2+ was then precipitated at elevated pHs by mixing the reactor effluent. XRD patterns of the precipitates showed that copper was precipitated in the form of CuS with a particle size of 14-22 nm whereas iron was precipitated as FeS with 32-85 nm particle size.
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