INVESTIGADORES
ALFANO Orlando Mario
artículos
Título:
Combined chemical oxidation and biological processes for herbicide degradation
Autor/es:
BENZAQUEN, T.B.; ISLA, M.A.; ALFANO, O.M.
Revista:
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Editorial:
JOHN WILEY & SONS LTD
Referencias:
Lugar: Londres; Año: 2016 vol. 91 p. 718 - 725
ISSN:
0268-2575
Resumen:
Fenton and photo-Fenton processes were explored as photochemical pre-treatments to improve the biodegradability of wastewater containing atrazine, a commercial pesticide. The effects of H2O2, Fe3+ and irradiation level on the degradation processes were studied and the optimal conditions determined.Fenton and photo-Fenton oxidation systems were able to remove 85 and 100% of atrazine, respectively, in a 120 min period. These processes produced a biocompatible solution, removing 100% of the initial biorecalcitrant compound; however, cyanuric acid remained in the effluent after the chemical oxidation treatment due to the stability of the N-heterocyclic ring of this acid. Nevertheless, itwas found that the cyanuric acid remaining from the photo-oxidative process can be removed bymeans of an anaerobic treatment.The results obtained in this work indicate that a coupled photo-Fenton biological treatment system is a feasible method to achieve the complete mineralization of biorecalcitrant pollutants such as atrazine.