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- Title
Remoción bacteriana de cinc y cadmio: estudio de factores asociados con el proceso.
- Authors
Pérez, Lizandra; Martínez, Armando; Salgado, Irina; Alberto Valdés, Luis; Cruz, Mario; Allende, Sheila; Collazo, Odalys; Liva, María; Elena Carballo, María
- Abstract
Metallic ions in aquatic ecosystems are considered important inorganic pollutants of the environment due to their mobility and toxicity to living organisms. The capacities of microorganisms to capture the metals present in aquatic ecosystems constitute an alternative for the conservation of natural resources. In the present work we evaluated the biosorption capacities of zinc and cadmium by bacterial strains of Proteus mirabilis and Bacillus subtilis in aqueous solutions, as well as the influence of different variables such as culture physiological age, cell concentration, pH, contact time and pre-treatment of cell biomass with physical and chemical methods. The capture of metals by bacterial cultures did not present differences in the different physiological stages evaluated and 2 g.L-1 of biomass were enough to reach high capture values. It was determined that the greatest influence in the process lies in the pH used, the contact time and the effect of each treatment to bacterial biomass. The results show the effectiveness of tested microbial biomasses in the biosorption of zinc and cadmium and their potential for environmental sanitation.
- Subjects
CONSERVATION of natural resources; BIOMASS chemicals; AGE; BACTERIAL cultures; CADMIUM; SANITATION; DAPHNIA magna
- Publication
Tecnología y Ciencias del Agua, 2020, Vol 11, Issue 3, p309
- ISSN
0187-8336
- Publication type
Article
- DOI
10.24850/j-tyca-2020-03-09