Tolerance and reduction of Cr(VI) by Bacillus amyloliquefaciens, B. thuringiensis and Paenibacillus sp., isolated from Pasto River

Tolerância e redução de Cr(VI) por Bacillus amyloliquefaciens, B. thuringiensis e Paenibacillus sp., isolados de rio Pasto

Authors

  • Jhonatan Pinta-Melo
  • Deisy Lorena Guerrero-Ceballos
  • Eduardo Ibargüen-Mondragón
  • Pablo Fernández-Izquierdo
  • Jenny Dimelza Gómez Arrieta
  • Edith Mariela Burbano-Rosero

DOI:

https://doi.org/10.46814/lajdv4n1-020

Keywords:

heavy metals, hexavalent chromium, removal of contaminants, bioreduction, chromium reducing bacteria.

Abstract

The accumulation of heavy metals such as Cr(VI) in the environment is a growing problem; however, the isolation of the bacteria present in these contaminated sources can provide an alternative for their treatment. In this sense, this research evaluated in vitro the percentage reduction of Cr(VI) and the effect of three concentrations (25, 60, and 100 mg/L of Cr(VI)) on the growth of bacterial isolates E4M3 Bacillus amyloliquefaciens [MK561611], E4M15 Bacillus thuringiensis [MK561610], and Paenibacillus sp. [MK561612]. Statistical analysis determined that 59% of the variation in growth is attributed to the interaction of bacteria and concentration (P <0.05; η2 = 0.59). Likewise, statistically significant differences were observed between bacteria concerning the percentage of reduction of Cr(VI) (P <0.05; η2 = 0.98). The data found on the population density and the percentage of reduction coupled with mathematical approximations are related to the intrinsic metabolic conditions of the bacteria and the selective pressure conditions of the environment where they are found.

Published

2022-02-22

How to Cite

PINTA-MELO, J. .; GUERRERO-CEBALLOS, D. L. .; IBARGÜEN-MONDRAGÓN, E. .; FERNÁNDEZ-IZQUIERDO, P. .; ARRIETA, J. D. G. .; BURBANO-ROSERO, E. M. . Tolerance and reduction of Cr(VI) by Bacillus amyloliquefaciens, B. thuringiensis and Paenibacillus sp., isolated from Pasto River: Tolerância e redução de Cr(VI) por Bacillus amyloliquefaciens, B. thuringiensis e Paenibacillus sp., isolados de rio Pasto. Latin American Journal of Development, [S. l.], v. 4, n. 1, p. 272–297, 2022. DOI: 10.46814/lajdv4n1-020. Disponível em: https://latinamericanpublicacoes.com.br/ojs/index.php/jdev/article/view/898. Acesso em: 17 aug. 2022.
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