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Microorganismos reductores de electrodos que recogen energía de los sedimentos marinos
Daniel R Bond1, Dawn E Holmes, Leonard M Tender
1Department of Microbiology, University of Massachusetts, Amherst, MA 01003, USA.
Science (New York, N.Y.)
|January 19, 2002
Resumen
Los científicos cosecharon electricidad de los sedimentos marinos utilizando electrodos de grafito. Los microorganismos, específicamente Geobacteraceae, utilizaron el electrodo como un aceptador de electrones para la energía, lo que permitió el crecimiento y sugirió aplicaciones de biorremediación.
Área de la Ciencia:
- Microbiología Microbiología.
- Ciencias del medio ambiente Ciencias del medio ambiente.
- La electroquímica es electroquímica.
Sus antecedentes:
- Los sedimentos marinos contienen materia orgánica y distintas zonas redox.
- Las comunidades microbianas juegan un papel en los procesos biogeoquímicos dentro de los sedimentos.
- La extracción de energía de los entornos naturales es un área de investigación activa.
Objetivo del estudio:
- Investigar el potencial para la recolección de electricidad a partir de sedimentos marinos.
- Para identificar los microorganismos involucrados en la recolección de energía de los electrodos.
- Explorar el uso de procesos microbianos para la biorremediación.
Principales métodos:
- El despliegue de ánodos de grafito en zonas de sedimentos marinos anóxicos.
- Conexión de ánodos a cátodos de grafito en agua aeróbica superpuesta.
- Análisis de las comunidades microbianas que colonizan los electrodos.
- Evaluación del crecimiento microbiano y la conservación de energía vinculada a la interacción de electrodos.
Principales resultados:
- Enriquecimiento específico de microorganismos Geobacteraceae en ánodos recolectores de energía.
- Demostración de que las Geobacteraceae pueden oxidar compuestos orgánicos utilizando electrodos como aceptores de electrones.
- Confirmación de que estos microorganismos conservan energía para el crecimiento a través de este proceso.
Conclusiones:
- Los sedimentos marinos pueden servir como fuente para la generación de electricidad a través de procesos electroquímicos microbianos.
- Las Geobacteraceae son actores clave en el sistema bioelectroquímico, utilizando electrodos para obtener energía.
- Esta tecnología ofrece un doble beneficio de recolección de energía y biorremediación de contaminantes orgánicos.
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