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BIOEMULSIFIER PRODUCTION BY MYCROBACTERIUM SP. STRAINS ISOLATED FROM MANGROVE AND THEIR APPLICATION TO REMOVE CADMIUN AND ZINC HAZARDOUS INDUSTRIAL RESIDUE
Autor
Afiliación
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Paulo de Góes. Rio de Janeiro, RJ, Brasil / Universidade Federal do Rio de Janeiro. Escola de Química. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Paulo de Góes. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Genômica Funcional e Bioinformática. Rio de Janeiro, RJ. Brasil. / Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Computacional e Sistemas,. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Escola de Química. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Paulo de Góes. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Paulo de Góes. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Genômica Funcional e Bioinformática. Rio de Janeiro, RJ. Brasil. / Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Computacional e Sistemas,. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Escola de Química. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Paulo de Góes. Rio de Janeiro, RJ, Brasil.
Resumen en ingles
The contamination of ecosystems with heavy metals is an important issue in current world and remediation
technologies should be in according to environmental sustainability concept. Bioemulsifier are promising
agents to be used in metal removal and could be effective to many applications in environmental
industries. The aims of this work was screening the potential production of bioemulsifier by
microorganisms isolated from an oil contaminated mangrove, and evaluate cadmium and zinc removal
potential of those strains from a hazardous industrial residue. From that, bioemulsifier-producing bacteria
were isolated from urban mangrove sediments. Four isolates were identified as Microbacterium sp by 16S
rRNA analysis and were able to reduce up to 53.3% of culture medium surface tension (TS) when using
glucose as carbon and energy source and 20.2% when sucrose was used. Suspensions containing
bioemulsifier produced by Microbacterium sp. strains show to be able to remove cadmium and zinc from
contaminated industrial residue, and its ability varied according carbon source. Significant differences in
metal removal were observed by all strains depending on the carbon source. When glucose was used, Cd
and Zn removal varied from 17 to 41%, and 14 to 68%, respectively. However, when sucrose was used it
was observed only 4 to a maximum of 15% of Cd removal, and 4 to 17% of Zn removal. When the same
tests were performed after ethanol precipitation, the results were different: the percentages of removal of
Zn (7-27%) and Cd (14-32%) were higher from sucrose cultures. This is the first report of heavy metals
removal by bioemulsifier from Microbacterium sp.
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