{"title":"Comparison of Bioleaching of Metals from Spent Petroleum Catalyst Using Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans","authors":"Haragobinda Srichandan, Ashish Pathak, Dong Jin Kim, Seoung-Won Lee","volume":83,"journal":"International Journal of Environmental and Ecological Engineering","pagesStart":848,"pagesEnd":853,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9996577","abstract":"
The present investigation deals with bioleaching of spent petroleum catalyst using At. ferrooxidans <\/em>and At. thiooxidans<\/em>. 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<\/em> and At. thiooxidans<\/em> were found to be highly effective in producing the acid. Bioleaching with At. ferrooxidans<\/em> and At. thiooxidans<\/em> led to higher recovery of metals compare to control. During bioleaching similar recoveries of metals were obtained using At. ferrooxidans<\/em> and At. thiooxidans. <\/em>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 <\/em>is comparatively more advantageous due to lower cost of sulphur. <\/p>\r\n","references":"[1]\tM. Marafi, A. Stanislaus, \"Options and process for spent catalyst handling and utilization\u201d J. Hazard. Mater. Vol. 101, p.123-132, 2003.\r\n[2]\tM. Marafi, A. Stanislaus, \"Spent catalyst waste management: A review Part I-Developments in hydroprocessing catalyst waste reduction and use\u201d Res. Conserv. Recyc. Vol. 52, p.859-873, 2008.\r\n[3]\tD. 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\u201d J. Haz. Mater. Vol.175, p. 267-273, 2010.\r\n[4]\tR. M. Gholami, S. M. Borghei, S. M. Mousavi, \"Bacterial leaching of a spent Mo-Co-Ni refinery catalyst using Acidthiobacillus ferrooxidans and Acidithiobacillus thiooxidans\u201d Hydrometallurgy. Vol.106, p.26-31, 2011.\r\n[5]\tD. 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\u201d J. Indust. Engg. Chem. Vol.16, p.866\u2013871, 2010.\r\n[6]\tD. 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\u201d J. Hazard. Mat. Vol.152, p.1082\u20131091, 2008.\r\n[7]\tD. Mishra, D. J. Kim, D. E. Ralph, J. G. Ahn, Y. H. Rhee,\"Bioleaching of vanadium rich spent refinery catalysts using sulfur oxidizing lithotrophs\u201d Hydrometllurgy. Vol. 88, p.202\u2013209, 2007.\r\n[8]\tL. Briand, H. Thomas, E. Donati, \"Vanadium (V) reduction in Thiobacillus thiooxidans cultures on elemental sulfur\u201d Biotechnology letters. Vol. 18, p. 505-508, 1996.\r\n[9]\tW. Mulak, B. Miazga, A. Szymczycha, \"Kinetics of nickel leaching from spent catalyst in sulphuric acid solution\u201d Int. J. Miner. Process. Vol. 77, p.231\u2013 235, 2005.\r\n[10]\tK.R. Blight, D.E. Ralph, D.E., 2004. Effect of ionic strength on iron oxidation with batch cultures of chemolithotrophic bacteria. Hydrometallurgy 73, 325\u2013 334.\r\n[11]\tT. Rohwerder, T. Gehrke, K. Kinzler, W. Sand, \"Bioleaching review part A: progress in bioleaching: fundamentals and mechanisms of bacterial metal sulfide oxidation\u201d Appl Microbial Biotechnol. Vol 63, p. 239-248, 2003.\r\n[12]\tA. Bharadwaj, Y. P. Ting, \"Bioleaching of spent hydrotreating catalyst by acidophilic thermophile Acidianus brierleyi: Leaching mechanism and effect of decocking\u201d Bioresource Technol. Vol 130, p. 673-680, 2013.\r\n","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 83, 2013"}