Study on the Effectiveness of Sulfate Reducing Bacteria to Remove Heavy Metals (Fe, Mn, Cu, Cr) in Acid Mine Drainage

Aiming at the problem of environmental pollution caused by heavy metals such as Fe, Mn, Cu, and Cr, Sulfate Reducing Bacteria (SRB) were enriched in mining soil. SRB was added to AMD containing different concentrations Cr batch experiments explore potential for treating AMD. Testing combining Scanning Electron Microscopy–Energy Dispersive Spectroscopy (SEM-EDS), X-ray Diffraction (XRD), Photoelectron (XPS) revealed mechanism which metal ions removed SRB. The results showed that had a strong ability remove total Fe concentration range 0–300 mg/L, removal percentage reached 92.16–93.17%. good effect on 0–20 Cu 79.79–81.80%. well; activity would probably not be inhibited below 500 mg/L. solidify using follows: > Mn Cu. When Fe2+ there precipitation same time, appearing black granules. This consisted mainly FeS, contained small amounts Fe3(PO4)2-8H2O, FeCO3, Fe(OH)2, Fe(OH)3, Fe2S well.