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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Bacha Khan University | - |
Autor(es): dc.contributor | Itatijuca Biotech | - |
Autor(es): dc.creator | Shah, Syed Sikandar [UNESP] | - |
Autor(es): dc.creator | Palmieri, Mauricio Cesar | - |
Autor(es): dc.creator | Sponchiado, Sandra Regina Pombeiro [UNESP] | - |
Autor(es): dc.creator | Bevilaqua, Denise [UNESP] | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:30:36Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:30:36Z | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-08-01 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.1016/j.hydromet.2020.105368 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/200433 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/200433 | - |
Descrição: dc.description | In this study, an economical and sustainable bio-hydrometallurgical route was evaluated for the recovery of aluminum from low-grade bauxite using the marine-derived fungus Aspergillus niger. Firstly, four different solid media were tested for high-yield spore production. Organic acid production capacity by A. niger was also evaluated in a medium supplemented with glucose or low-cost molasses as a carbon source using fungal spores or pellets as inoculum. The concentrations of the produced organic acids were determined by High-Performance Liquid Chromatography (HPLC). The results showed that oat-agar can be used as an inexpensive solid medium for greater fungal sporulation, while the liquid medium supplemented with molasses as a low-cost carbon source can be used for higher organic acids production. Among the conditions tested, A. niger spore inoculum showed the highest yield of the total produced organic acids (122.40 g L−1 or 81.6% (grams of sucrose used per grams of total acid) and also the highest (1.02 ± 0.02 g L−1 h−1) acids production rate using molasses as an inexpensive carbon source. This cultivation condition was selected for the bioleaching studies with low-grade bauxite. Among the three different bioleaching methods tested, the direct two-steps bioleaching process resulted in higher aluminum leaching (91.2%) compared to indirect (84.8%) and direct one-step (82.8%) bioleaching process. According to the results obtained using marine-derived A. niger under the established culture conditions, proved to be an eco-friendly and cost-effective way for aluminum recovery from low-grade bauxite ore and has the potential to be adopted on a pilot scale. | - |
Descrição: dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | - |
Descrição: dc.description | Department of Biochemistry and Chemical Technology São Paulo State University (UNESP) Institute of Chemistry Araraquara | - |
Descrição: dc.description | Department of Chemistry Bacha Khan University, KPK | - |
Descrição: dc.description | Itatijuca Biotech | - |
Descrição: dc.description | Department of Biochemistry and Chemical Technology São Paulo State University (UNESP) Institute of Chemistry Araraquara | - |
Descrição: dc.description | FAPESP: 2015/24757-9 | - |
Idioma: dc.language | en | - |
Relação: dc.relation | Hydrometallurgy | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | Aluminum recovery | - |
Palavras-chave: dc.subject | Aspergillus niger | - |
Palavras-chave: dc.subject | Bioleaching | - |
Palavras-chave: dc.subject | Low-grade bauxite | - |
Palavras-chave: dc.subject | Molasses | - |
Título: dc.title | Environmentally sustainable and cost-effective bioleaching of aluminum from low-grade bauxite ore using marine-derived Aspergillus niger | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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