ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Bioleaching of pre-treated spent refinery catalyst was performed using sulfur and ironoxidizing bacteria separately. Both the mixed cultures were grown at various concentration of eitherferrous sulfate or elemental sulfur. Bioleaching process was conducted by varying the reaction time,effect of substrates and effect of catalyst amount. Under the most favourable transport conditionsexamined, (5g/L spent catalysts, 10g/L ferrous sulfate, reaction time 7 days) the mixed ironoxidizing bacteria were able to recover Ni, V, and Mo of 90, 80 and 54 % respectively. Highercatalyst and ferrous sulfate concentration showed decline result in recovery of Mo and V. Nishowed consistent results throughout the series of experiments (88 to 90% recovery).The mixed sulfur oxidizing bacteria were observed to be more effective than the iron oxidizingbacteria. The sulfur oxidizing cells were able to recover Ni, V and Mo of 88, 94 and 46 %respectively (spent catalysts 50g/L, elemental sulfur of 2% (w/v), reaction time 7 days). Theoxidation of elemental sulfur to sulfate could play a vital role for extraction of the metals
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.20-21.119.pdf
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