Determinación del color como herramienta de detección de contaminación por fuel en playas arenosas
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Abstract
El color ha sido utilizado en numerosos estudios para caracterizar las
muestras de sedimento y discriminar su origen. Sin embargo, no existen estudios
sobre la influencia de la contaminación en esta propiedad física. El objetivo
de este trabajo es evaluar los cambios de color en el sedimento que
presenta las diferentes morfologías del fuel (galletas, arenas grises). El color
de las muestras seleccionadas sometidas a distintos tratamientos fue medido
usando un espectrofotómetro Konica Minolta CM-2600d. Los sedimentos
arenosos estudiados pertenecieron a dos playas (Nemiña y O Rostro), unas
de las más afectadas por el accidente del petrolero Prestige (Noviembre
2002). Este estudio puso de manifiesto la importancia del color para la adecuada
discriminación en el seguimiento de la contaminación con fuel. Nuestros
resultados demostraron la capacidad del espectrofotómetro para evidenciar
la existencia de contaminación por fuel en arenas que parecían limpias
a simple vista. Además, esta técnica fue útil para establecer el grado de contaminación
por fuel, relacionando la oscuridad del color gris con el estado
de degradación del fuel en el sedimento
Color has been used in many studies to characterize sediment samples and to discriminate their origin. However, there are not studies about the influence of oil contamination in this physical property. The aim of this work is to assess the changes in color in sediments showing different types of oil appearances (tar balls, grey sands). The color of selected samples subjected to different treatments was measured using a Konica Minolta CM-2600d spectrophotometer. The studied sand sediments belong to the two beaches (Nemiña and O Rostro) most strongly affected by the Prestige oil spill (November 2002). This study highlights the interest of adequate color discrimination for oil contamination monitoring. Our results demonstrated the ability of spectrophotometer to evidence the occurrence of oil contamination in sands that look clean to the naked eye. Furthermore, this technique was also useful to establish the degree of oil contamination, linking the darkness of the grey color to the degradation stage of the oil in the sediment
Color has been used in many studies to characterize sediment samples and to discriminate their origin. However, there are not studies about the influence of oil contamination in this physical property. The aim of this work is to assess the changes in color in sediments showing different types of oil appearances (tar balls, grey sands). The color of selected samples subjected to different treatments was measured using a Konica Minolta CM-2600d spectrophotometer. The studied sand sediments belong to the two beaches (Nemiña and O Rostro) most strongly affected by the Prestige oil spill (November 2002). This study highlights the interest of adequate color discrimination for oil contamination monitoring. Our results demonstrated the ability of spectrophotometer to evidence the occurrence of oil contamination in sands that look clean to the naked eye. Furthermore, this technique was also useful to establish the degree of oil contamination, linking the darkness of the grey color to the degradation stage of the oil in the sediment
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