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Fungal leaching of hazardous heavy metals from a spent hydrotreating catalyst
, Article World Academy of Science, Engineering and Technology ; Volume 76 , 2011 , Pages 726-731 ; 2010376X (ISSN) ; Borghei, S. M ; Mousavi, S. M ; Sharif University of Technology
Abstract
In this study, the ability of Aspergillus niger and Penicillium simplicissimum to extract heavy metals from a spent refinery catalyst was investigated. For the first step, a spent processing catalyst from one of the oil refineries in Iran was physically and chemically characterized. Aspergillus niger and Penicillium simplicissimum were used to mobilize Al/Co/Mo/Ni from hazardous spent catalysts. The fungi were adapted to the mixture of metals at 100-800 mg L -1 with increments in concentration of 100 mg L -1. Bioleaching experiments were carried out in batch cultures. To investigate the production of organic acids in sucrose medium, analyses of the culture medium by HPLC were performed at...