Modelado de la biodegradación en biorreactores de lodos de hidrocarburos totales del petróleo intemperizados en suelos y sedimentos (Biodegradation modeling of sludge bioreactors of total petroleum hydrocarbons weathering in soil and sediments)
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ResumenSe ha estudiado el efecto de la adición de un extracto acuoso rico en fenoles, provenientes de cascarilla de arroz, sobre las propiedades microestructurales y ópticas de películas biodegradables a base de almidón termoplástico y poli (ε-caprolactona). Para el extracto de cascarilla de arroz se determinó la cantidad de sólidos solubles, el contenido de compuestos fenólicos y la actividad antioxidante. En el caso de las películas, se estudió su morfología mediante Microscopía Electrónica de Barrido y se determinó la transmitancia interna, color y brillo. Los resultados muestran diferencias estadísticamente significativas (p<0.05) para la transmitancia, color y brillo del material. En cuanto a su morfología, la adición de fenoles generó películas menos rugosas, más homogéneas y compactas. Basado en los resultados del trabajo, se concluye que la adición del extracto afecta significativamente la estructura del material modificando sus propiedades ópticas.
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AbstractThe effect of the addition of an extract rich in phenols, from rice husks, on the microstructural and optical properties of biodegradable films based on thermoplastic starch and poly (ε-caprolactone) has been studied. For the rice husk extract, the amount of soluble solid, the content of phenolic compounds and the antioxidant activity were determined. In the case of films, their morphology was studied by Scanning Electron Microscopy and their internal transmittance, colour and brightness were determined. The results show statistically significant differences (p <0.05) for the transmittance, colour and brightness of the material. Regarding its morphology, the addition of phenols generated less rough, and more homogeneous and compact films. Based on the results of the work, it is concluded that the addition of extract significantly affects the structure of the material by modifying its optical properties.
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