A comparative study of ultrasonic cavitation and Fenton's reagent for bisphenol A degradation in deionised and natural waters

Torres-Palma, Ricardo A.; Abdelmalek, Fatiha; Combet, Evelyne; Pétrier, Christian; Pulgarín, C.

doi:10.1016/j.jhazmat.2007.04.056

Cited by 164 publications

(62 citation statements)

References 29 publications

(29 reference statements)

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“…5b) was only 38.3% and 12.6% in the Cu-g-Al 2 O 3 and Cu-MCM-41 suspensions, respectively, while approximately 70% of TOC removal was observed in the DCS Ns and DCAS Ns suspensions, which were much higher than the 10% to 30% TOC removal for BPA degradation in most of the reported Fenton processes under similar conditions. 36, 37 The changes of concentrations of the residual Cu in the solutions of DCS Ns and DCAS Ns during the Fenton process are shown in Fig. S7.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Enhanced Fenton-catalytic efficiency by highly accessible active sites on dandelion-like copper–aluminum–silica nanospheres for water purification

2016

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A novel Fenton catalyst consisting of dandelion-like copper-aluminum-silica nanospheres (DCAS Ns) was successfully prepared via a hydrothermal process for the first time. This catalyst exhibited exceptionally high activity and stability for the degradation and mineralization of various refractory pollutants, as demonstrated with phenol, pharmaceuticals, pesticides, dyes and endocrine disrupting chemicals at neutral pH. The reaction rate was 5.2-13.4 times higher than that of the conventional Fenton catalysts. Moreover, the utilization efficiency of H 2 O 2 was as high as 86.7%. According to the characterization, DCAS Ns possessed a unique fibrous structure arranged in three dimensions to form nanospheres, just like dandelion flowers. Cu and Al were co-incorporated into the framework of the fibrous silica nanospheres

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Section: Catalyst Characterizationmentioning

confidence: 99%

Enhanced Fenton-catalytic efficiency by highly accessible active sites on dandelion-like copper–aluminum–silica nanospheres for water purification

2016

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“…Effect of inorganics species in natural water at different isoxazolyl penicillin concentrations Recent investigations have shown that inorganic species in natural waters have inhibition and enhancement effects during the degradation of organic pollutants by AOPs (Costa and Olivi, 2009;Frontistis et al, 2014;Guzman-Duque et al, 2011;Hazime et al, 2012;Lipczynska-Kochany and Kochany, 2008;Merouani et al, 2010;Torres et al, 2007). In order to evaluate the effect of inorganics species commonly found in natural waters, experiments were carried out using characterized (Table 1) natural mineral water (pH 6.2).…”

Section: Effect Of Organic Additivesmentioning

confidence: 99%

Selecting the best AOP for isoxazolyl penicillins degradation as a function of water characteristics: Effects of pH, chemical nature of additives and pollutant concentration

Villegas-Guzmán

Silva-Agredo

Flórez

et al. 2017

Journal of Environmental Management

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a b s t r a c tTo provide new insights toward the selection of the most suitable AOP for isoxazolyl penicillins elimination, the degradation of dicloxacillin, a isoxazolyl penicillin model, was studied using different advanced oxidation processes (AOPs): ultrasound (US), photo-Fenton (UV/H 2 O 2 /Fe 2þ ) and TiO 2 photocatalysis (UV/TiO 2 ). Although all processes achieved total removal of the antibiotic and antimicrobial activity, and increased the biodegradability level of the solutions, significant differences concerning the mineralization extend, the pH of the solution, the pollutant concentration and the chemical nature of additives were found. UV/TiO 2 reached almost complete mineralization; while~10% mineralization was obtained for UV/H 2 O 2 /Fe 2þ and practically zero for US. Effect of initial pH, mineral natural water and the presence of organic (glucose, 2-propanol and oxalic acid) were then investigated. UV/H 2 O 2 /Fe 2þ and US processes were improved in acidic media, while natural pH favored UV/TiO 2 system. According to both the nature of the added organic compound and the process, inhibition, no effect or enhancement of the degradation rate was observed. The degradation in natural mineral water showed contrasting results according to the antibiotic concentration: US process was enhanced at low concentration of dicloxacillin followed by detrimental effects at high substrate concentrations. A contrary effect was observed during photo-Fenton, while UV/TiO 2 was inhibited in all of cases. Finally, a schema illustrating the enhancement or inhibiting effects of water matrix is proposed as a tool for selecting the best process for isoxazolyl penicillins degradation.

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“…Torres et al [43] compared the efficiency of both sonolysis and Fenton in the degradation of BPA, one of the most common EDCs, in the cases of deionised acidic water (pH 3) and natural water (pH 7.6). Ultrasound was performed at 300 kHz and 80 W. Fenton's process was operated using ferrous sulphate (100mol/L) and continuous H 2 O 2 addition at the rate as it was produced when sonication was applied in water in absence of substrate.…”

Section: Sonolysismentioning

confidence: 99%

Removal of Endocrine Disruptors from Urban Wastewater by Advanced Oxidation Processes (AOPs): A Review

Cesaro¹,

Belgıorno²

2016

TOBIOTJ

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Abstract:Over the last years the growing presence of endocrine disrupting compounds in the environment has been regarded as a serious sanitary issue. The more and more frequent detection of these compounds in the effluents of wastewater treatment plants poses the risk associated to their persistence into the aquatic systems as well as to their adverse effects on both public health and environment.As conventional systems do not allow their efficient removal, great attention has been raised towards their possible treatment by Advanced Oxidation Processes (AOPs). They rely on the action of hydroxyl radicals, which are highly reactive species, able to oxidize recalcitrant and non-biodegradable pollutants.AOPs can either provide contaminant partial degradation or their complete removal. As their effectiveness has been proved for a wide spectrum of both organic and inorganic pollutants, they are considered a suitable option for the treatment of contaminated aqueous media, especially when combined with conventional biological processes.This paper aims at reviewing main AOPs for the removal of endocrine disruptors, in order to highlight the most important features of different technologies, thus providing their comparative assessment. To this end, a brief overview of the most frequently detected endocrine disruptor compounds was also discussed, in order to clarify their fate into the environment as well as the contamination pathways of greatest concern for human health.

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A comparative study of ultrasonic cavitation and Fenton's reagent for bisphenol A degradation in deionised and natural waters

Cited by 164 publications

References 29 publications

Enhanced Fenton-catalytic efficiency by highly accessible active sites on dandelion-like copper–aluminum–silica nanospheres for water purification

Enhanced Fenton-catalytic efficiency by highly accessible active sites on dandelion-like copper–aluminum–silica nanospheres for water purification

Selecting the best AOP for isoxazolyl penicillins degradation as a function of water characteristics: Effects of pH, chemical nature of additives and pollutant concentration

Removal of Endocrine Disruptors from Urban Wastewater by Advanced Oxidation Processes (AOPs): A Review

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