Advanced oxidation of phenolic compounds

Alnaizy, Raafat; Akgerman, Aydin

doi:10.1016/s1093-0191(00)00024-1

Cited by 271 publications

(185 citation statements)

References 18 publications

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“…Formation of this compound has been previously reported by Zhang and Huang [34] upon triclosan oxidation by manganese oxides at room temperature. It has to be noted that dihydroxibenzenes and benzoquinones are in redox equilibrium in acid media, which explains the presence of p-quinone of triclosan [35]. On the other hand, 2,4-DCP and 4-CC are formed when the OH radical attacks to triclosan in the ortho-position leading to the opening of one of the aromatic rings.…”

Section: Oxidation Byproductsmentioning

confidence: 99%

Triclosan breakdown by Fenton-like oxidation

Muñoz

Pedro

Casas

et al. 2012

Chemical Engineering Journal

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Fenton-like oxidation has proved to be highly efficient for the removal of triclosan, a highly toxic emerging water pollutant. From 10mg/L starting aqueous solutions complete conversion of triclosan was achieved in less than 1h at 25°C and around 20min at 50°C with 1mg/L Fe3+ and H2O2 at the theoretical stoichiometric amount (25mg/L). From the evolution of byproducts a reaction pathway has been proposed according to which oxidation of triclosan gives rise to several aromatic intermediates (mainly, p-hydroquinone of triclosan and 2,4-dichlorophenol) which evolve to short-chain organic acids. These compounds are mineralized except oxalic acid. A dramatic decrease of ecotoxicity was achieved in a relatively short time (more than 95% in 15min at 35°C). The evolution of ecotoxicity is intimately related to the disappearance of triclosan, much more toxic than the aromatic oxidation intermediates. This disappearance was successfully described by a simple pseudo-first order rate equation with an apparent activation energy value close to 27kJ/mol. The apparent rate constant at 25°C was several orders of magnitude higher than the reported in the literature for other chlorophenolic compounds indicating a higher susceptibility of triclosan to OH radical attackThis research has been supported by the Spanish MICINN through the project CTQ2008-03988 and by the CM through the project S-2009/AMB-158

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Section: Oxidation Byproductsmentioning

confidence: 99%

Triclosan breakdown by Fenton-like oxidation

Muñoz

Pedro

Casas

et al. 2012

Chemical Engineering Journal

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“…The decrease of TOC suggested that intermediates of the photolysis of DPAA could be mineralized. Phenol was reported that it could be converted into CO 2 under the UVC treatment [38,39]. A proposed phototransformation process was established based on the results (Scheme 1).…”

Section: Phototransformation Pathway and Total Arsenic Mass Balancementioning

confidence: 99%

Photodegradation of diphenylarsinic acid by UV-C light: Implication for its remediation

Wang

Teng

et al. 2016

Journal of Hazardous Materials

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“…Previous researchers reported that direct oxidation of organic compounds by atmospheric oxygen from decomposition of hydrogen peroxide is very slow 29 . Similarly, oxidation of gadung starch by UV irradiation alone (0 % H 2 O 2 ) was considered negligible due to low quantum yield of the starch particles to hydrogen peroxide 30 .…”

Section: Effect Of H 2 O 2 Concentrationmentioning

confidence: 99%

H2O2/UV Photo-Oxidation of Gadung (Dioscorea Hispida Dennst.) Starch and its Product Physicochemical Characterization

Kumoro¹,

Retnowati²,

Ratnawati³

et al. 2016

Orient. J. Chem

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This work aimed to study the preparation and physicochemical properties characterization of oxidized gadung starch obtained from oxidation process implementing combined H 2 O 2 -UV irradiation. The photo-oxidation process was carried out in a well-mixed slurry reaction system at ambient temperature. The extent of oxidation was determined based on the carboxyl and the carbonyl contents of the oxidized gadung starch. The results show that oxidation process altered the carbonyl and carboxyl contents of the starch. Except the morphology of the starch, the swelling power, solubility and gelatinization temperature of the starch were severely affected by H 2 O 2 /UV oxidation process.

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Advanced oxidation of phenolic compounds

Cited by 271 publications

References 18 publications

Triclosan breakdown by Fenton-like oxidation

Triclosan breakdown by Fenton-like oxidation

Photodegradation of diphenylarsinic acid by UV-C light: Implication for its remediation

H2O2/UV Photo-Oxidation of Gadung (Dioscorea Hispida Dennst.) Starch and its Product Physicochemical Characterization

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