Photo-Fenton oxidation of phenol and organochlorides (2,4-DCP and 2,4-D) in aqueous alkaline medium with high chloride concentration

Luna, Airton José de; Chiavone‐Filho, Osvaldo; Machulek, Amílcar; Moraes, José Ermírio Ferreira de; Nascimento, Cláudio Augusto Oller do

doi:10.1016/j.jenvman.2012.06.014

Cited by 40 publications

(21 citation statements)

References 47 publications

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“…[2]. It Many AOPs have been applied to 2,4-D removal including Fenton's reaction [4,5], photo-Fenton [6,7], UV/H 2 O 2 processes [8,9], UV/TiO 2 [10,11], VUV [12], ozonation [13,14] and catalysed ozonation [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Development of a kinetic model for the UV/H2O2 photodegradation of 2,4-dichlorophenoxiacetic acid

Murcia¹,

Vershinin²,

Briantceva³

et al. 2015

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

“…Besides, a possible reaction pathway based on the primary formation of 2,4-dichlorophenol and chlorophenols [7,9] is proposed. Finally, and taking into account the dependence of the kinetic constant with the experimental conditions a model based on a pseudo-first order kinetic has been formulated.…”

Section: Introductionmentioning

confidence: 99%

Development of a kinetic model for the UV/H2O2 photodegradation of 2,4-dichlorophenoxiacetic acid

Murcia¹,

Vershinin²,

Briantceva³

et al. 2015

Chemical Engineering Journal

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“…Any residual hydrogen peroxide that is not consumed in the process will spontaneously decompose into water and molecular oxygen, being thus a "clean" reagent itself. These features make homogeneous photo-Fenton based AOPs the leading candidate for cost-efficient, environmental friendly treatment of industrial effluents on a small to moderate scale [6,[15][16][17].…”

Section: Photo-fenton Reactionmentioning

confidence: 99%

Application of Different Advanced Oxidation Processes for the Degradation of Organic Pollutants

Machulek¹,

Osugi²,

Ferreira³

et al. 2013

Organic Pollutants - Monitoring, Risk and Treatment

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chemical structures into substances that are less toxic and/or more readily biodegradable by employing chemical oxidizing agents in the presence of an appropriate catalyst and/or ultraviolet light to oxidize or degrade the pollutant of interest. These technologies known as advanced oxidation processes (AOP) or advanced oxidation technologies (AOT), have been widely studied for the degradation of diverse types of industrial wastewaters. These processes are particularly interesting for the treatment of effluents containing highly toxic organic compounds, for which biological processes may not be applicable unless bacteria that are adapted to live in toxic media are available. The production of powerful oxidizing agents, such as the hydroxyl radical, is the main objective of most AOP. The hydroxyl radical reacts rapidly and relatively non-selectively with organic compounds by hydrogen abstraction, by addition to unsaturated bonds and aromatic rings, or by electron transfer. In the case of persistent organic pollutants (wastes), complete decontamination may require the sequential application of several different decontamination technologies such as a pretreatment with a photochemical AOP followed by a biological or electrochemical treatment.This chapter discusses the influence of different AOP on the degradation and mineralization of several different classes of organic pollutants such as pesticides, pharmaceutical formulations and dyes. The use of the Fenton and photo-Fenton reactions as tools for the treatment of pesticides and antineoplastic agents is presented, as well as examples of the optimization of the important parameters involved in the process such as the source of iron ions (free or complexed), the irradiation source (including the possibility of using sunlight), and the concentrations of iron ions and hydrogen peroxide. The chapter also reports the use of TiO 2 nanotubes obtained by electrochemical anodization, nanoparticles prepared by a molten salt technique, and Ag-doped TiO 2 nanoparticles as heterogeneous photocatalysts, emphasizing their potential for use in environmental applications. These catalysts were characterized by a combination of techniques, including scanning electron microscopy, elemental analysis, and energy dispersive x-ray spectroscopy. Advanced Oxidation Processes (AOP)AOP are specific chemical reactions characterized by the generation of chemical oxidizing agents capable of oxidizing or degrading the pollutant of interest. The efficiency of the AOP is generally maximized by the use of an appropriate catalyst and/or ultraviolet light [1][2][3].In most AOP, the objective is to use systems that produce the hydroxyl radical (HO • ) or another species of similar reactivity such as sulfate radical anion (SO 4 •-). These radicals react with the majority of organic substances at rates often approaching the diffusion-controlled limit (unit reaction efficiency per encounter). Both of these species are thus highly reactive and only modestly selective in their capacity to degrade toxic organi...

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“…The slag and ash residues of pesticides contain CuO, ZnO, PbO, KCl, Na2CO3, CaCO3 и SiO2 [13,14]. Therefore, it is required to search new environmentally friendly methods of neutralization of forbidden and unconditional organic pesticide preparations [13][14][15][16][17][18]. One of such methods can be a photochemical oxidation of pesticides.…”

Section: Introductionmentioning

confidence: 99%

Photochemical oxidation of γ-exachlorocyclohexane and 4,4’- dichlorodiphenyldichloroethylene

Zykova

Rebezov

Максимюк

et al. 2017

ARRB

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Objectives: Utilization of the forbidden organochlorine pesticides demands searching of new ways of their neutralization. In such way there can be a photochemical oxidation of pesticides. As a research objects we chose γ-hexachlorocyclohexane (lindane) and 4,4 'dichlorodiphenyldichloroethylene (DDE). Radiation treatment of solution is carried out by the UFlamp with a wavelength of 254 nanometers.

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Photo-Fenton oxidation of phenol and organochlorides (2,4-DCP and 2,4-D) in aqueous alkaline medium with high chloride concentration

Cited by 40 publications

References 47 publications

Development of a kinetic model for the UV/H2O2 photodegradation of 2,4-dichlorophenoxiacetic acid

Development of a kinetic model for the UV/H2O2 photodegradation of 2,4-dichlorophenoxiacetic acid

Application of Different Advanced Oxidation Processes for the Degradation of Organic Pollutants

Photochemical oxidation of γ-exachlorocyclohexane and 4,4’- dichlorodiphenyldichloroethylene

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