Photo-Fenton degradation of the herbicide 2,4-D in aqueous medium at pH conditions close to neutrality

Journal of Environmental Management
L O ConteO M Alfano

Abstract

A theoretical and experimental study of the photo-Fenton degradation of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) in water is presented. A kinetic model derived from a reaction sequence is proposed using the ferrioxalate complex as iron source for conditions of pH = 5. The kinetic model was employed to predict the concentrations of 2,4-D, 2,4-dichlorophenol (2,4-DCP), hydrogen peroxide (HP) and oxalate (Ox) in a flat plate laboratory reactor irradiated with a solar simulator. Two types of incident irradiation levels were tested by different combinations of attenuation filters. The effects of the oxalate/Fe(+3) molar ratio (Ox/Fe), the reaction temperature (T) and the 2,4-D/HP molar ratio (R) on the photo-Fenton process were also investigated. For low radiation level and operating conditions of R = 50 and T = 50 °C, a 2,4-D conversion of 95.6% was obtained after 180 min. Moreover, the 2,4-D conversion was almost 100% in only 120 min when the system was operated under the same operating conditions and high radiation level. From the proposed model and the experimental data, the corresponding kinetic parameters were estimated applying a nonlinear regression method. A good agreement between the kinetic model and experimen...Continue Reading

References

Jul 6, 2005·Water Research·Joonseon Jeong, Jeyong Yoon
Nov 13, 2012·Journal of Hazardous Materials·Michel VedrenneJuan Manuel de Andrés
Jan 15, 2014·Journal of Environmental Health Science & Engineering·Mansooreh DehghaniMojtaba Karamimanesh
Mar 31, 2015·The Science of the Total Environment·M CataláY Segura
Mar 31, 2015·Journal of Environmental Management·Agustina V SchenoneOrlando M Alfano

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Citations

Mar 15, 2016·Environmental Science and Pollution Research International·Leandro O ConteOrlando M Alfano
Jan 26, 2017·Aquatic Toxicology·Tingting GeDejun Huang
Dec 4, 2019·Environmental Science and Pollution Research International·Paweł MuszyńskiTadeusz Paszko
Jan 24, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Sanjeev Sangami, Basavaraju Manu
Sep 20, 2018·Environmental Science and Pollution Research International·Francesca AudinoOrlando Mario Alfano
Jan 6, 2021·Environmental Science and Pollution Research International·Bárbara N GiménezLeandro O Conte
Apr 5, 2021·Journal of Environmental Management·Ramiro Picoli NippesMara Heloísa Neves Olsen Scaliante
Apr 8, 2021·Environmental Science and Pollution Research International·Rocío Girón-NavarroFortunata Santoyo-Tepole

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