PHOTO-FENTON DEGRADATION OF A HERBICIDE USING THE FERRIOXALATE COMPLEX FOR PH CONDITIONS CLOSE TO NEUTRALITY: LABORATORY AND SOLAR PILOT-PLANT REACTOR.

LEANDRO O. CONTE; AGUSTINA V. SCHENONE; ORLANDO M. ALFANO

Congreso; VIII Encontro sobre Aplicações Ambientais de Processos Oxidativos Avançados II Congresso Iberoamericano de Processos Oxidativos Avançados; 2015

A theoretical and experimental study of the photo-Fenton degradation of herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) is presented. A kinetic model derived from a reaction sequence is proposed using the ferrioxalate complex as iron source, for conditions of pH close to neutrality. Operating the system under simulated solar radiation, with high radiation level and the highest concentration of hydrogen peroxide(HP), the conversion of 2,4-D after 180 min of reaction was close to 100% over the full range of working temperatures. Moreover, for all the tests performed using the solar reactor, complete destruction of 2,4-D and 2,4-DCP (the main intermediate, 2,4-dichlorophenol) is obtained in only 75 and 120 min of reaction, respectively.