TY - JOUR
T1 - Biological conversion of anglesite (PbSO4) and lead waste from spent car batteries to galena (PbS).
AU - Weijma, J.
AU - de Hoop, K.
AU - Bosma, W.
AU - Dijkman, H.
PY - 2002
Y1 - 2002
N2 - Lead paste, a solid mixture containing PbSO4, PbO2, PbO/Pb(OH)2 precipitate, and elemental Pb, is one of the main waste fractions from spent car batteries. Biological sulfidation represents a new process for recovery of lead from this waste. In this process the lead salts in lead paste are converted to galena (PbS) by sulfate-reducing bacteria. This paper investigates a continuous process for sulfidation of anglesite (PbSO4), the main constituent of lead paste, and lead paste, consisting of a laboratory-scale gas-lift bioreactor to which a slurry of anglesite or lead paste was supplied. Sulfate or elemental sulfur was added as an additional sulfur source. Hydrogen gas served as an electron donor for the biological reduction of sulfate and elemental sulfur to sulfide by sulfate- and sulfur-reducing bacteria. Anglesite was almost completely converted to galena at a loading rate of 19 kg of PbSO4 m-3 day-1, producing a sludge of which the crystalline lead phases consisted of >98␙bS (galena) and 1-2␎lemental Pb. With lead paste, stable sulfidation rates of up to 17 kg of lead paste m-3 day-1 were demonstrated, producing a sludge of which the crystalline lead phases consisted of an estimated >96␙bS, 1-2␎lemental Pb, and 1-2␙bO2
AB - Lead paste, a solid mixture containing PbSO4, PbO2, PbO/Pb(OH)2 precipitate, and elemental Pb, is one of the main waste fractions from spent car batteries. Biological sulfidation represents a new process for recovery of lead from this waste. In this process the lead salts in lead paste are converted to galena (PbS) by sulfate-reducing bacteria. This paper investigates a continuous process for sulfidation of anglesite (PbSO4), the main constituent of lead paste, and lead paste, consisting of a laboratory-scale gas-lift bioreactor to which a slurry of anglesite or lead paste was supplied. Sulfate or elemental sulfur was added as an additional sulfur source. Hydrogen gas served as an electron donor for the biological reduction of sulfate and elemental sulfur to sulfide by sulfate- and sulfur-reducing bacteria. Anglesite was almost completely converted to galena at a loading rate of 19 kg of PbSO4 m-3 day-1, producing a sludge of which the crystalline lead phases consisted of >98␙bS (galena) and 1-2␎lemental Pb. With lead paste, stable sulfidation rates of up to 17 kg of lead paste m-3 day-1 were demonstrated, producing a sludge of which the crystalline lead phases consisted of an estimated >96␙bS, 1-2␎lemental Pb, and 1-2␙bO2
U2 - 10.1021/bp025523k
DO - 10.1021/bp025523k
M3 - Article
VL - 18
SP - 770
EP - 775
JO - Biotechnology Progress
JF - Biotechnology Progress
SN - 8756-7938
ER -