Photoinduced transformation of waste-derived soluble bio-based substances
| Autor: | A. Bianco Prevot, Marco Minella, Daniel O. Mártire, Luciano Carlos, Silvia Berto, Antonio Arques, E. Montoneri, Davide Vione, Paola Avetta, Mónica C. Gonzalez, D. Persico |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Absorption spectroscopy
General Chemical Engineering BIOWASTE Phototransformation processes biowaste soluble bio-based substances fluorescence matrix spectral slope Photochemistry Industrial and Manufacturing Engineering Absorbance Pulmonary surfactant Environmental Chemistry Irradiation Photodegradation PHOTOTRANSFORMATION PROCESSES Chemistry Otras Ciencias Químicas Ciencias Químicas Química General Chemistry Biowaste Chromophore Fluorescence Photobleaching Spectral slope SOLUBLE BIO-BASED SUBSTANCES FLUORESCENCE MATRIX Soluble bio-based substances Fluorescence matrix CIENCIAS NATURALES Y EXACTAS QUIMICA FISICA |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| Popis: | Waste-derived, soluble bio-based substances (SBO), are effective low-cost photosensitizers that couldfind application in pollutant photodegradation. For this reason, it is important to understand if and towhat extent irradiation could modify their properties. The exposure of SBO to simulated sunlight inducedimportant spectral and structural modifications. Both the whole material and its acid-soluble fractionwere characterized, highlighting several properties in common with humic and fulvic substances, includingabsorption spectra, specific absorbance and fluorescence behavior. The latter was described with athree-component model using PARAFAC analysis. Irradiation induced SBO photobleaching, but the absorbanceof the acid-soluble fraction increased with irradiation. This finding suggests a progressivephotochemical solubilization of SBO, which is confirmed by the increase of the carboxylic groups. In additionto absorbance, the fluorescence of whole SBO was also decreased by irradiation, thereby suggestingthat both chromophores and fluorophores were photodegraded. The increasingly hydrophilic charactergiven to SBO by irradiation also accounted for the photoinduced decrease of the surfactant propertiesof the material. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas Consejo Nacional de Investigaciones Científicas y Técnicas |
| Databáze: | OpenAIRE |
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