Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/33416
Título : Cupriavidus necator strains: zinc and cadmium tolerance and bioaccumulation
Autor: Ferreira, Paulo Ademar Avelar
Bomfeti, Cleide Aparecida
Soares, Cláudio Roberto Fonsêca de Souza
Soares, Bruno Lima
Moreira, Fatima Maria de Souza
Palavras-chave: β-proteobacteria
Bioremediation
Heavy-metal
Soil pollution
β-proteobactéria
Biorremediação
Metais pesados
Poluição do solo
Publicador: Escola Superior de Agricultura "Luiz de Queiroz"
Data da publicação: Nov-2018
Referência: FERREIRA, P. A. A. et al. Cupriavidus necator strains: zinc and cadmium tolerance and bioaccumulation. Scientia Agricola, Piracicaba, v. 75, n. 6, p. 452-460, Nov./Dec. 2018.
Abstract: Among soil microorganisms, the genus Cupriavidus has garnered particular scientific, economic and ecological interest because of its ability to fix nitrogen and tolerate high concentrations of metals. The aim of this study was to analyze four strains of Cupriavidus necator for their ability to tolerate and bioaccumulate cadmium and zinc. The tolerance of these strains to these metals was assessed in liquid culture medium containing different concentrations of Zn + Cd and in soil solutions and soils contaminated with multiple elements including Zn, Cd, Cu and Pb. The four strains showed high tolerance to Zn and Cd, both in culture medium and when inoculated into contaminated soil solutions or multi-element contaminated soil. The UFLA02-71 strain displayed the highest ability to bioaccumulate these metals. It was able to accumulate 93.76 µmol g cell−1 of Zn and 16.03 µmol g cell−1 of Cd when cultured in liquid medium with a total heavy metal concentration of 9,140 µmol L−1 (9,000 Zn + 140 Cd) and was able to accumulate 16.98 µmol g cell−1 of Cd in the soil solution. An increase in the pH of the culture medium resulting from the growth of the C. necator strains reduced the Zn2+ and Cd2+ ions in the medium and increased the concentrations of the ZnHPO4 and CdHPO4 species in solution. Thus, we concluded that they show great potential for use in the bioremediation of HM-contaminated areas.
URI: http://repositorio.ufla.br/jspui/handle/1/33416
Idioma: en_US
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