INVESTIGADORES
BEAMUD Sara guadalupe
artículos
Título:
May a natural lake behave as an efficient Fenton reactor under dark conditions?
Autor/es:
NICHELA, D. A.; EINSCHLAG, F. S. G.; BEAMUD, S. G.; TEMPORETTI, P. F.; PEDROZO, F. L.
Revista:
International Journal of Energy and Water Resources
Editorial:
Springer
Referencias:
Año: 2019
ISSN:
2538-3604
Resumen:
Phenol degradation experiments were performed to study the potential behavior of the acidic Lake Caviahue (LC) as a darkFenton reactor under natural conditions and upon H2O2addition at doses typically used for technological applications. Inboth cases, to assess the influence of dissolved organic matter present in the lake, control experiments were carried out underidentical initial conditions (pH, concentrations of phenol, iron, and H2O2),but in the absence of organic matter. A first setof experiments was performed to test the feasibility of dark Fenton processes under environmental conditions. Lake watersamples were used as reaction matrix and catalyst source, whereas phenol and H2O2were added as model pollutant andoxidant, respectively. H2O2concentrations used were similar to those reported for rainwater. Results show that phenol canbe degraded under all conditions studied and that the amount of phenol consumed depends on both the H2O2concentrationadded and the matrix composition LC A second set of experiments was designed to characterize the lake behavior as a naturalFenton reactor upon the addition of H2O2concentrations typically used for technological applications. Although phenolconcentration profiles obtained for LC and the artificial solution show the characteristic behavior of Fenton-like systems, thetrends are rather different, since for LC, the lag phase is much longer than that for the artificial matrix. Overall, the resultssuggest that the Fe(III)-chelating effect of the organic matter present in LC slows down reaction rates, but it does not blockphenol degradation through Fenton-like processes.