info:eu-repo/semantics/article
Increased biodegradability of the fungicide imazalil after photo-Fenton treatment in solar pilot plant
Fecha
2019-04Registro en:
Lopez Loveira, Elsa Gabriela; Fantoni, Sofía; Espinosa, Mariela Soledad; Babay, Paola Alejandra; Curutchet, Gustavo Andres; et al.; Increased biodegradability of the fungicide imazalil after photo-Fenton treatment in solar pilot plant; Elsevier; Journal of Environmental Chemical Engineering; 7; 2; 4-2019; 1-8; 103023
2213-3437
CONICET Digital
CONICET
Autor
Lopez Loveira, Elsa Gabriela
Fantoni, Sofía
Espinosa, Mariela Soledad
Babay, Paola Alejandra
Curutchet, Gustavo Andres
Candal, Roberto Jorge
Resumen
Wastewater containing pesticides released to water courses without any previous treatment produces an extremely negative impact into the environment, causing concern among the population and authorities. Imazalil (IMZ) is a post-harvest fungicide used on a myriad of fruit crops; it is classified as "likely to be carcinogenic in humans" and produce a negative impact on the biota. In this work we propose a coupled solar Fenton-Biological process in a pilot plant for the treatment of water containing the fungicide IMZ and organic coadjutants. Water solutions containing up to 500 mg/L IMZ, 500 mgC/L TOC and 1300-1400 mgO2/L COD were partially oxidized by Solar-Fenton process. For the first time, the efficiency of the treatment in the Buenos Aires area during different seasons was studied. In summer the treatment was faster but less efficient than in winter. Organic compounds were converted to organic acids like malic, formic and oxalic acids. The resultant solution was biodegraded using consortium adapted to IMZ oxidation byproducts without the incorporation of any extra carbon sources. As a result of the treatment TOC and COD were reduced to acceptable values for discharge in sewage, and its toxicity (determined by assays on Lactuca sativa L.) was significantly decreased. These results exemplified the advantages of combining advanced oxidation with the biological process for recalcitrant compounds degradation.