CORDIS proporciona enlaces a los documentos públicos y las publicaciones de los proyectos de los programas marco HORIZONTE.
Los enlaces a los documentos y las publicaciones de los proyectos del Séptimo Programa Marco, así como los enlaces a algunos tipos de resultados específicos, como conjuntos de datos y «software», se obtienen dinámicamente de OpenAIRE .
Resultados aprovechables
The project deals with the study of organic matter of natural and antropogenic origin present in rivers and coastal zones using fluorescence spectroscopy. Aim of the investigations is the elaboration of new or improved methods for the detection and identification of organic pollutants in natural waters which can be applied for environmental monitoring.
The study was performed by several institutions with long-term experience in hydrographic optics and spectroscopy. The Physics Departments at the University of Moscow, Russia, and the University of Oldenburg, Germany; the Laboratory of Molecular Photophysics and Photochemistry of the CNRS in Bordeaux, France; and Italian Agency for New Technologies (ENEA), Energy and Environment, in Frascati, Italy.
At the laboratories involved, the following topics were studied:
spectroscopy of specific substances of natural origin which act as a background if organic pollutants are detected with fluorescence methods; these analyses covered the aromatic amino acids tryptophan and tyrosine which are compounds of bacterial and algal proteins; humic substances, fulvic and gallic acids, lignin and tannin, which are the relevant fluorophors of dissolved organic matter in natural waters.
spectroscopy of the main classes of mineral oil which are transported at sea and are occasionally found as oil spills; this included also the investigation of water soluble oil fractions, the modification of their fluorescence signature in the dissolved phase, and the contrast to natural fluorophors with the aim of their specific detection.
the effects of fluorescence saturation as a function of the intensity of the exciting light. When using high power laser sources, saturation has shown to be a relevant process if pollutants in water are to be measured quantitatively. Moreover, it needs to be considered for an accurate calibration of instruments designed for in situ and remote measurements. Algorithms for the description of fluorescence saturation effects have been derived.
The results obtained in the project provide useful and important information for the measurement of water quality with fluorescence spectroscopy. The spectra of pollutants and naturally occurring substances enlarge the data basis necessary for interpreting field measurements. The fluorescence saturation observed as a function of the light source intensity leads to improvements of the intercalibration of laboratory instruments, and in situ and airborne fluorometry. These sensors yielded mostly data that could not be brought into a common relation because fluorescence saturation effects have not yet been considered in their calibration procedures.
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