Removal of cadmium and lead by adapted strains of pseudomonas aeruginosa and enterobacter cloacae.

• Bojórquez, Carolina ^[1] ; Frías Espericueta, Martín Gabriel ^[1] ; Voltolina, Domenico ^[2]
  1. [1] Universidad Autónoma de Sinaloa

     Universidad Autónoma de Sinaloa

     México

     
  2. [2] Centro de Investigaciones Biológicas

     Centro de Investigaciones Biológicas

     Madrid, España

     
• Localización: Revista Internacional de Contaminación Ambiental, ISSN 0188-4999, Vol. 32, Nº. 4, 2016, págs. 407-412
• Idioma: inglés
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• Resumen

  • This study determined the cadmium and lead (Cd and Pb) biosorption of two bacterial strains identified with molecular techniques as Pseudomonas aeruginosa and Enterobacter cloacae. These species were isolated from domestic wastewater and adapted to a maximum of 2.83 and 17.4 mg/L of Cd and Pb, respectively. Cd sorption by both strains, determined by atomic absorption spectrophotometry, ranged from 14.4 to 16.5 %. However, the difference between strains was not significant. P. aeruginosa and E. cloacae were comparatively more efficient in the sorption of Pb (82.47and 72.16 % respectively) than for Cd. The amount of Pb absorbed by the bacterial biomass was significantly higher in P. aeruginosa than in E. cloacae cultures.