REMOÇÃO DE COBRE POR BIOMASSA DE ENTEROCOCCUS FAECALIS E SALMONELLA ENTERICA SOROVAR ENTERITIDIS EM SOLUÇÃO AQUOSA
DOI:
https://doi.org/10.18593/eba.v15i2.8528Keywords:
Bacteria, Bioacumulation, Heavy metalAbstract
Em razão dos poucos estudos a respeito do uso de células vivas na remoção de metais, com esta pesquisa visou-se avaliar a remoção de cobre por Enterococcus faecalis ATCC 51299 e por Salmonella enterica sorovar Enteritidis CCT 4475 em crescimento contínuo. Os resultados obtidos demonstraram efeito significativo (P<0,05) para os fatores espécie e concentrações de cobre em decorrência do crescimento, remoção total e acúmulo intracelular de cobre. As distintas concentrações de cobre limitaram circunstancialmente o crescimento das biomassas, entretanto, o metal nas concentrações utilizadas não foi inibitório, o que sugere o desenvolvimento de adaptação fisiológica ao metal cobre em concentrações de 7,72 mg L-1 e 15,20 mg L-1. Salmonella enterica sorovar Enteritidis CCT 4475 apresentou maior percentual de remoção total e acúmulo intracelular de cobre quando comparada à Enterococcus faecalis ATCC 51299. Entretanto, ambas as cepas foram capazes de remover cobre em meio de cultivo. Esses resultados sugerem que as cepas em estudo exibem potencial para a exploração na remoção de cobre.
Palavras-chave: Bactéria. Bioacumulação. Metal pesado.
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