2017, Número 1
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Biotecnol Apl 2017; 34 (1)
Estandarización de variables involucradas en la remoción microbiana de cadmio y cinc en solución acuosa
Carballo-Valdés ME, Martínez A, Salgado I, Pérez L, Cruz M, Liva MB, Alleyne S, Rodríguez MM, Garza Y
Idioma: Ingles.
Referencias bibliográficas: 36
Paginas: 1221-1225
Archivo PDF: 266.73 Kb.
RESUMEN
El agua es un recurso natural importante para la vida y su contaminación química constituye uno de los problemas más graves que enfrenta la sociedad actual. Un método amigable con el medio ambiente para disminuir contaminantes metálicos de ecosistemas acuáticos lo constituye la biosorción microbiana con aplicación en el tratamiento de aguas residuales. El objetivo de este trabajo fue determinar los efectos de las principales variables involucradas en el proceso de remoción de cadmio y cinc por Pseudomonas mendocina (Ps-1) y Saccharomyces cerevisiae (Sc-10). Se evaluaron las variables pH, concentración de los metales, edad fisiológica del cultivo y estado de la biomasa microbiana. El pH, la concentración de los metales y la biomasa muerta o inactiva presentaron un mayor efecto significativo sobre la biosorción de cadmio y cinc por ambos microorganismos. El ajuste de las variables ensayadas facilitó incrementar los niveles de captura de los iones metálicos, lo que indica que bajo las condiciones determinadas P. mendocina (Ps-1) y S. cerevisiae (Sc-10) pueden utilizarse en la descontaminación de aguas residuales que contienen ambos metales pesados.
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