Mineralization of herbicide 3,6-dichloro-2-methoxybenzoic acid in aqueous medium by anodic oxidation, electro-Fenton and photoelectro-Fenton

Brillas, Enric; Baños, Miguel Ángel; Garrido, José Antonio

doi:10.1016/s0013-4686(03)00142-7

Cited by 119 publications

(71 citation statements)

References 31 publications

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“…The fast photodecarboxylation of such Fe(III)-oxalate complexes by UV light explains the highest oxidative ability of the photoelectro-Fenton treatment, which allows a fast and total mineralization of highly concentrated acidic aqueous solutions of 2,4,5-T at low current and temperature. A similar behaviour was found for the herbicide 3,6-dichloro-2-methoxybenzoic acid [110].…”

Section: Electrochemical Treatmentsupporting

confidence: 78%

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

Augugliaro

Litter

Palmisano

et al. 2006

Journal of Photochemistry and Photobiology C: Photochemistry Re

427

180

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Heterogeneous photocatalysis is a process of great potential for pollutant abatement and waste treatment. In order to improve the overall performance of the photoprocess, heterogeneous photocatalysis is being combined with physical or chemical operations, which affect the chemical kinetics and/or the overall efficiency. This review addresses the various possibilities to couple heterogeneous photocatalysis with other technologies to photodegrade organic and inorganic pollutants dissolved in actual or synthetic aqueous effluents. These combinations increase the photoprocess efficiency by decreasing the reaction time in respect to the separated operations or they decrease the cost in respect of heterogeneous photocatalysis alone, generally in terms of light energy. Depending on the operation coupled with heterogeneous photocatalysis, two categories of combinations exist. When the coupling is with ultrasonic irradiation, photo-Fenton reaction, ozonation, or electrochemical treatment, the combination affects the photocatalytic mechanisms thus improving the efficiency of the photocatalytic process. When the coupling is with biological treatment, membrane reactor, membrane photoreactor, or physical adsorption, the combination does not affect the photocatalytic mechanisms but it improves the efficiency of the overall process. The choice of the coupling is related to the type of wastewater to be treated. A synergistic effect, giving rise to an improvement of the efficiency of the photocatalytic process, has been reported in the literature for many cases.

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Section: Electrochemical Treatmentsupporting

confidence: 78%

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

Augugliaro

Litter

Palmisano

et al. 2006

Journal of Photochemistry and Photobiology C: Photochemistry Re

427

180

View full text Add to dashboard Cite

show abstract

“…The release of chloride ion was faster (31 mg/L) at the initial stage (0-15 min), then it slowly increased up to 64.7 mg/L till 135 min and after that no increase in the chloride concentration was observed. The similar kind of results was observed in the other literature (Brillas et al 2003) and the mineralization process can be written with the following Eq. (16):…”

Section: Degradation Products (Hplc-ms Analysis)supporting

confidence: 76%

“…Many researchers were successfully applied the AOPs in degradation of dicamba in water, which includes photocatalytic oxidation (Lu and Chen 1997), anodic oxidation, electro-Fenton followed by photoelectroFenton (Brillas et al 2003), Zno-Fe 2 O 3 catalyst (MayaTreviñoa et al 2014). Also, the physical and biological methods have been applied, which includes adsorption with calcined-layered double hydroxide (You et al 2002) membrane bioreactor (Ghoshdastidar and Tong 2013) and activated sludge process (Nitschke et al 1999).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Fenton’s oxidation of herbicide dicamba in water using response surface methodology

Sangami

Basavaraju

2017

Appl Water Sci

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In this study Fenton's oxidation of dicamba in aqueous medium was investigated by using the response surface methodology. dosage of 11.38 and 0.33 mM respectively. The whole oxidation process was monitored by high performance liquid chromatography (HPLC) along with liquid chromatography/mass spectrometry (LC/MS). It was found that 82% of dicamba was mineralized to oxalic acid, chloride ion, CO 2 and H 2 O, which was confirmed with COD removal of 81.53%. The regression analysis was performed, in which standard deviation (\4%), coefficient of variation (\8), F value (Fisher's Test) ([2.74), coefficient of correlation (R 2 = R 2 adj ) and adequate precision ([12) were in good agreement with model values. Finally, the treatment process was validated by performing the additional experiments.

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“…Many chlorophenoxy herbicides have been oxidized using electrogenerated Fenton's reagent [9][10][11][12][13][14][15][16]. In this technique, hydrogen peroxide is continuously generated in an acidic contaminated solution from the two-electron reduction of O 2 at RVC, carbon-felt or gas-diffusion cathodes:…”

Section: Introductionmentioning

confidence: 99%

Anodic oxidation of mecoprop herbicide at lead dioxide

2008

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The electrochemical oxidation of an aqueous solution containing mecoprop (2-(2-methyl-4-chlorophenoxy)propionic acid) has been studied at PbO 2 anodes by cyclic voltammetry and bulk electrolysis. The influence of current density, hydrodynamic conditions, temperature and pH on the degradation rate and current efficiency is reported. The results obtained show that the use of PbO 2 leads to total mineralization of mecoprop due to the production of oxidant hydroxyl radical electrogenerated from water discharge. The current efficiency for the electrooxidation of mecoprop is enhanced by low current density, high recycle flow-rates and high temperature. In contrast, the pH effect was not significant. It has also been observed that mecoprop decay kinetics follows a pseudo-first-order reaction and the rate constant increases with rising current density.

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Mineralization of herbicide 3,6-dichloro-2-methoxybenzoic acid in aqueous medium by anodic oxidation, electro-Fenton and photoelectro-Fenton

Cited by 119 publications

References 31 publications

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

Optimization of Fenton’s oxidation of herbicide dicamba in water using response surface methodology

Anodic oxidation of mecoprop herbicide at lead dioxide

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