Bioleaching of spent refinery processing catalyst using Aspergillus niger with high-yield oxalic acid

Santhiya, Deenan; Ting, Yen‐Peng

doi:10.1016/j.jbiotec.2004.10.011

Cited by 167 publications

(70 citation statements)

References 23 publications

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“…Extracellular ligands excreted by fungi, e.g. Aspergillus and Penicillium spp., have been used to leach metals such as zinc, copper, nickel and cobalt from a variety of materials, including low-grade mineral ores (Brandl, 2001;Mulligan & Galvez-Cloutier, 2003;Santhiya & Ting, 2005). Of the several mechanisms involved in such chemo-organotrophic (5heterotrophic) leaching, the production of low-molecular-mass organic acids is of major significance (Gadd, 1999(Gadd, , 2007.…”

Section: Bioleaching Of Metals From Oresmentioning

confidence: 99%

Metals, minerals and microbes: geomicrobiology and bioremediation

2010

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Microbes play key geoactive roles in the biosphere, particularly in the areas of element biotransformations and biogeochemical cycling, metal and mineral transformations, decomposition, bioweathering, and soil and sediment formation. All kinds of microbes, including prokaryotes and eukaryotes and their symbiotic associations with each other and 'higher organisms', can contribute actively to geological phenomena, and central to many such geomicrobial processes are transformations of metals and minerals. Microbes have a variety of properties that can effect changes in metal speciation, toxicity and mobility, as well as mineral formation or mineral dissolution or deterioration. Such mechanisms are important components of natural biogeochemical cycles for metals as well as associated elements in biomass, soil, rocks and minerals, e.g. sulfur and phosphorus, and metalloids, actinides and metal radionuclides. Apart from being important in natural biosphere processes, metal and mineral transformations can have beneficial or detrimental consequences in a human context. Bioremediation is the application of biological systems to the clean-up of organic and inorganic pollution, with bacteria and fungi being the most important organisms for reclamation, immobilization or detoxification of metallic and radionuclide pollutants. Some biominerals or metallic elements deposited by microbes have catalytic and other properties in nanoparticle, crystalline or colloidal forms, and these are relevant to the development of novel biomaterials for technological and antimicrobial purposes. On the negative side, metal and mineral transformations by microbes may result in spoilage and destruction of natural and synthetic materials, rock and mineral-based building materials (e.g. concrete), acid mine drainage and associated metal pollution, biocorrosion of metals, alloys and related substances, and adverse effects on radionuclide speciation, mobility and containment, all with immense social and economic consequences. The ubiquity and importance of microbes in biosphere processes make geomicrobiology one of the most important concepts within microbiology, and one requiring an interdisciplinary approach to define environmental and applied significance and underpin exploitation in biotechnology. Microbes as geoactive agentsMicrobes interact with metals and minerals in natural and synthetic environments, altering their physical and chemical state, with metals and minerals also able to affect microbial growth, activity and survival. In addition, many minerals are biogenic in origin, and the formation of such biominerals is of global geological and industrial significance, as well as providing important structural components for many organisms, including important microbial groups such as diatoms, foraminifera and radiolaria (Ehrlich, 1996;Gadd & Raven, 2010). Geomicrobiology can simply be defined as the roles of microbes in geological processes (Banfield & Nealson, 1997;Banfield et al., 2005; Konhauser, 2007;Ehrlich & Newman, 2009). Metalminera...

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Section: Bioleaching Of Metals From Oresmentioning

confidence: 99%

Metals, minerals and microbes: geomicrobiology and bioremediation

2010

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“…Some studies have revealed that the bioleaching of Al can be carried out in cultures of A. thiooxidans with a yield of approximately 40% (Krebs et al, 1997). Other authors have reported that, on applying bioleaching with fungi, it is also possible to recover Al, with around 30% recovery (Aung and Ting, 2005;Santhiya and Ting, 2005). The solubilization of V was not influenced by the pulp density or by the type of leaching (chemical or microbial) used.…”

Section: Indirect Microbial Leachingmentioning

confidence: 97%

BIOLEACHING OF METALS FROM A SPENT DIESEL HYDRODESULFURIZATION CATALYST EMPLOYING Acidithiobacillus thiooxidans FG-01

Ferreira

Sérvulo

Costa

et al. 2017

Braz. J. Chem. Eng.

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-This study evaluates the recovery of heavy metals employing a spent catalyst from the hydrodesulfurization (HDS) of diesel, with no chemical, thermal or physical pretreatment, using the bacterial strain Acidithiobacillus thiooxidans FG-01. Direct and indirect bioleaching tests were carried out in Erlenmeyer flasks (500 mL). The influence of the pulp density and supplementation with elemental sulfur on the bioleaching were also investigated. The spent catalyst contained organochlorines, petroleum hydrocarbons and heavy metals in its composition. The best recovery results (26% Al, 26% V and 39% Mo) were achieved in the two-stage (indirect) bioprocess, with a pulp density of 50 g/L. It was not possible to recover Co, Cu and Ni (< 5%) under any of the conditions tested. The bacterial strain A. thiooxidans FG-01 was found to be a promising candidate for the recovery of Al, V and Mo using the crude spent HDS catalyst.

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“…As a result of the stringent environmental criteria on spent catalyst handling and disposal, research on the process for recycling and reutilization of spent FCC catalysts has received considerable attention. Bioleaching of heavy metals [2][3][4][5] and chemical leaching methods with mineral acids (sulphuric and nitric acid) 6,7 and organic acids (citric, oxalic and gluconic acid) 2,3,[8][9][10] as well as mixture of organic acids were used to explore the route to reclaim the metals in the spent FCC catalyst. Utilization of spent catalyst as raw materials in the production of other valuable products is an attractive option, with taking the environmental regulations and economical profits into consideration.…”

Section: Introductionmentioning

confidence: 99%

Reuse of Spent FCC Catalyst for Removing Trace Olefins from Aromatics

Pu¹,

Luan²,

Shi³

2012

Bulletin of the Korean Chemical Society

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Pretreatment of spent FCC catalyst and its application in remove trace olefins in aromatics were investigated in this research. The most effective pretreatment route of spent FCC catalyst was calcining at 700 o C for 1 h, washing with 5% oxalic acid solution in ultrasonic reactor and dried. Treated spent FCC catalyst was modified with metal halides, then to prepare catalyst to remove trace olefins in aromatics. X-ray diffraction, Pyridine-FTIR, N2 adsorption-desorption and inductively coupled plasma optical emission spectrometer (ICP-OES) were used to investigate the pretreatment process. The result showed that the performance of the treated spent FCC catalyst was much greater than that of the spent FCC catalyst, which indicted the possibility and improvement of this research.

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Bioleaching of spent refinery processing catalyst using Aspergillus niger with high-yield oxalic acid

Cited by 167 publications

References 23 publications

Metals, minerals and microbes: geomicrobiology and bioremediation

Metals, minerals and microbes: geomicrobiology and bioremediation

BIOLEACHING OF METALS FROM A SPENT DIESEL HYDRODESULFURIZATION CATALYST EMPLOYING Acidithiobacillus thiooxidans FG-01

Reuse of Spent FCC Catalyst for Removing Trace Olefins from Aromatics

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