Environmentally sustainable and cost-effective bioleaching of aluminum from low-grade bauxite ore using marine-derived Aspergillus niger

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorBacha Khan University-
Autor(es): dc.contributorItatijuca Biotech-
Autor(es): dc.creatorShah, Syed Sikandar [UNESP]-
Autor(es): dc.creatorPalmieri, Mauricio Cesar-
Autor(es): dc.creatorSponchiado, Sandra Regina Pombeiro [UNESP]-
Autor(es): dc.creatorBevilaqua, Denise [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:30:36Z-
Data de disponibilização: dc.date.available2022-02-22T00:30:36Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.hydromet.2020.105368-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/200433-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/200433-
Descrição: dc.descriptionIn 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.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionDepartment of Biochemistry and Chemical Technology São Paulo State University (UNESP) Institute of Chemistry Araraquara-
Descrição: dc.descriptionDepartment of Chemistry Bacha Khan University, KPK-
Descrição: dc.descriptionItatijuca Biotech-
Descrição: dc.descriptionDepartment of Biochemistry and Chemical Technology São Paulo State University (UNESP) Institute of Chemistry Araraquara-
Descrição: dc.descriptionFAPESP: 2015/24757-9-
Idioma: dc.languageen-
Relação: dc.relationHydrometallurgy-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAluminum recovery-
Palavras-chave: dc.subjectAspergillus niger-
Palavras-chave: dc.subjectBioleaching-
Palavras-chave: dc.subjectLow-grade bauxite-
Palavras-chave: dc.subjectMolasses-
Título: dc.titleEnvironmentally sustainable and cost-effective bioleaching of aluminum from low-grade bauxite ore using marine-derived Aspergillus niger-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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