Biodegradación del petróleo crudo por células bacterianas inmovilizadas sobre esferas de almidón de maíz y alginato
DOI:
https://doi.org/10.33448/rsd-v10i17.24706Palabras clave:
Biodegradación; Celda de inmovilización; Matriz polimérica; Hidrocarburos.Resumen
Las celdas inmovilizadas tienen ventajas en la eliminación de hidrocarburos del petróleo en comparación con el uso de celdas libres. Este trabajo tuvo como objetivo evaluar el potencial de degradación de hidrocarburos por bacterias inmovilizadas sobre matrices de soporte compuestas por alginato de potasio comercial y almidón de maíz. La matriz polimérica inmovilizadora se desarrolló con 2% de alginato dental y 0,5% y 1% de almidón de maíz. Las matrices tienen macroporos internos, buena capacidad para inmovilizar células, aumento de la respiración basal (F2 y F3: 4 mg / l de CO2 60 días), biomasa bacteriana (F1: 1,5 x 106 UFC / g 60 días) y eliminación de n-alcanos y HAP del sedimento, en comparación con las células libres (0 mg / l CO2; 0,3 x 106 UFC / g 60 días). Los hidrocarburos aromáticos benzo (a) antraceno y antraceno no se degradaron. El naftaleno y el dibenzo (a) antraceno alcanzaron tasas de degradación del 60% y el 80%, respectivamente. Por lo tanto, el consorcio probado y la matriz polimérica desarrollada son prometedores para su uso en la biorremediación de entornos contaminados por hidrocarburos.
Citas
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Derechos de autor 2021 Carla Jaqueline Silva Sampaio; José Roberto Bispo de Souza; Gilson Correia de Carvalho; Cristina Maria Quintella; Milton Ricardo de Abreu Roque
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