Comparison of Bioleaching of Metals from Spent Petroleum Catalyst Using Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans
The present investigation deals with bioleaching of spent petroleum catalyst using At. ferrooxidans and At. thiooxidans. The spent catalyst used in the present study was pretreated with acetone to remove the oily hydrocarbons. FESEM and XPS analysis indicated the presence of metals in sulfide and oxide forms in spent catalyst. Both At. ferrooxidans and At. thiooxidans were found to be highly effective in producing the acid. Bioleaching with At. ferrooxidans and At. thiooxidans led to higher recovery of metals compare to control. During bioleaching similar recoveries of metals were obtained using At. ferrooxidans and At. thiooxidans. This might be due to the presence of metals as soluble oxides and sulphides in the spent catalyst. At the end of bioleaching, about 87-90% Ni, 34% Al, 65-73% Mo and 92-97% V were leached using above bacteria. It is elucidated that bioleaching with At. thiooxidans is comparatively more advantageous due to lower cost of sulphur.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1089042Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1798
 M. Marafi, A. Stanislaus, "Options and process for spent catalyst handling and utilization” J. Hazard. Mater. Vol. 101, p.123-132, 2003.
 M. Marafi, A. Stanislaus, "Spent catalyst waste management: A review Part I-Developments in hydroprocessing catalyst waste reduction and use” Res. Conserv. Recyc. Vol. 52, p.859-873, 2008.
 D. Pradhan, D. Mishra, D. J. Kim, J.G. Ahan, G.R. Chaudhury, "Bioleaching kinetics and multivariate analysis of spent petroleum catalyst dissolution using two acidophiles” J. Haz. Mater. Vol.175, p. 267-273, 2010.
 R. M. Gholami, S. M. Borghei, S. M. Mousavi, "Bacterial leaching of a spent Mo-Co-Ni refinery catalyst using Acidthiobacillus ferrooxidans and Acidithiobacillus thiooxidans” Hydrometallurgy. Vol.106, p.26-31, 2011.
 D. Pradhan, D. J. Kim, J. G. Ahn, G. R. Chaudhury, S. W. Lee,"Kinetics and statistical behavior of metals dissolution from spent petroleum catalyst using acidophilic iron oxidizing bacteria” J. Indust. Engg. Chem. Vol.16, p.866–871, 2010.
 D. Mishra, D. J. Kim, D. E. Ralph, J. G. Ahn, Y. H. Rhee,"Bioleaching of spent hydro-processing catalyst using acidophilic bacteria and its kinetics aspect” J. Hazard. Mat. Vol.152, p.1082–1091, 2008.
 D. Mishra, D. J. Kim, D. E. Ralph, J. G. Ahn, Y. H. Rhee,"Bioleaching of vanadium rich spent refinery catalysts using sulfur oxidizing lithotrophs” Hydrometllurgy. Vol. 88, p.202–209, 2007.
 L. Briand, H. Thomas, E. Donati, "Vanadium (V) reduction in Thiobacillus thiooxidans cultures on elemental sulfur” Biotechnology letters. Vol. 18, p. 505-508, 1996.
 W. Mulak, B. Miazga, A. Szymczycha, "Kinetics of nickel leaching from spent catalyst in sulphuric acid solution” Int. J. Miner. Process. Vol. 77, p.231– 235, 2005.
 K.R. Blight, D.E. Ralph, D.E., 2004. Effect of ionic strength on iron oxidation with batch cultures of chemolithotrophic bacteria. Hydrometallurgy 73, 325– 334.
 T. Rohwerder, T. Gehrke, K. Kinzler, W. Sand, "Bioleaching review part A: progress in bioleaching: fundamentals and mechanisms of bacterial metal sulfide oxidation” Appl Microbial Biotechnol. Vol 63, p. 239-248, 2003.
 A. Bharadwaj, Y. P. Ting, "Bioleaching of spent hydrotreating catalyst by acidophilic thermophile Acidianus brierleyi: Leaching mechanism and effect of decocking” Bioresource Technol. Vol 130, p. 673-680, 2013.