Paracetamol degradation intermediates and toxicity during photo-Fenton treatment using different iron species

Trovó, Alam G.; Nogueira, Raquel Fernandes Pupo; Agüera, Ana; Fernández‐Alba, Amadeo R.; Malato, Sixto

doi:10.1016/j.watres.2012.07.015

Cited by 91 publications

(46 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, in the absence of ozone, no decrease of total iron concentration is observed which was due to the absence of oxalic acid formation during this run. Toxicity of ferryoxalate complex towards D. magna was reported by Trovó et al [40,41] when they observed this phenomenon during the photo-Fenton oxidation of amoxiciline and paracetamol (acetaminophen) with FeSO 4 and potassium ferryoxalate as catalysts. These authors reported 100% D. magna mobility inhibition in a control run where ferryoxalate was present.…”

Section: Ecotoxicitymentioning

confidence: 75%

Some ozone advanced oxidation processes to improve the biological removal of selected pharmaceutical contaminants from urban wastewater

Espejo

Aguinaco

Amat

et al. 2013

Journal of Environmental Science and Health, Part A

View full text Add to dashboard Cite

Removal of nine pharmaceutical compounds: acetaminophen, AAF, antipyrine, ANT, caffeine, CAF, carbamazepine, CRB, diclofenac, DCF, hydrochlorothiazide, HCT, ketorolac, KET, metoprolol, MET and sulfamethoxazole, SMX, spiked in a primary sedimentation effluent of a municipal wastewater has been studied with sequential aerobic biological and ozone advanced oxidation systems. Ozone, UVA or Fe(III) during photocatalytic ozonations also allowed mineralization increases, compared to the single ozonation process, from 13% to about 35%. Biodegradability of the treated wastewater increased 50% in the biological process and other 150% after the ozonation processes. Both untreated and treated wastewater was non toxic for Daphnia Magna except when Fe(III) was used in photocatalytic ozonation. In this case, the ferryoxalate formed seems to be the reason of toxicity. Kinetic information on ozone processes reveals that pharmaceuticals at the very low concentrations they are found in urban wastewater are mainly removed through free radical oxidation.2

show abstract

Section: Ecotoxicitymentioning

confidence: 75%

Some ozone advanced oxidation processes to improve the biological removal of selected pharmaceutical contaminants from urban wastewater

Espejo

Aguinaco

Amat

et al. 2013

Journal of Environmental Science and Health, Part A

View full text Add to dashboard Cite

show abstract

“…Several studies have been conducted to find an effective method of acetaminophen degradation in aqueous solutions. Among then can be mentioned chemical [7,8], electrochemical [9][10][11], sonolysis [12], Fenton [13], photo-Fenton [14][15][16][17][18], solar/TiO 2 and solar/photo-Fenton [19], solar-photoelectro-Fenton [20], ozonation and H 2 O 2 /UV oxidation [21], ozonation catalyzed with photo-Fenton [18], TiO 2 photocatalysis [22][23][24][25], and electrocatalysis [26]. In these studies, partial degradation of acetaminophen was achieved, from 14% [15] to 88% [13], rather than a total mineralization.…”

Section: Introductionmentioning

confidence: 99%

“…The reaction time ranged from six minutes [17] to more than six hours [22]. Furthermore, in most of these studies, intermediates/oxidation products produced by the processes were not degraded and were consequently detected at the end of the tests [10,14,21,22]. High voltages between 600 and 1400 V [27] or the continuous feeding of pure O 2 for H 2 O 2 generation [17] were required.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Acetaminophen and Its Transformation Products in Aqueous Solutions by Using an Electrochemical Oxidation Cell with Stainless Steel Electrodes

Zavala

Estrada

2016

Water

View full text Add to dashboard Cite

Abstract:In this study, a novel electrochemical oxidation cell using stainless steel electrodes was found to be effective in oxidizing acetaminophen and its transformation products in short reaction times. Aqueous solutions of 10 mg/L-acetaminophen were prepared at pH 3, 5, 7, and 9. These solutions were electrochemically treated at direct current (DC) densities of 5.7 mA/cm 2 , 7.6 mA/cm 2 , and 9.5 mA/cm 2 . The pharmaceutical and its intermediates/oxidation products were determined by using high pressure liquid chromatography (HPLC). The results showed that electrochemical oxidation processes occurred in the cell. Acetaminophen degradation rate constants increased proportionally with the increase of current intensity. High current densities accelerated the degradation of acetaminophen; however, this effect diminished remarkably at pH values greater than 5. At pH 3 and 9.5 mA/cm 2 , the fastest degradation of acetaminophen and its intermediates/oxidation products was achieved. To minimize the wear down of the electrodes, a current density ramp is recommended, first applying 9.5 mA/cm 2 during 2.5 min or 7.6 mA/cm 2 during 7.5 min and then continuing the electrochemical oxidation process at 5.7 mA/cm 2 . This strategy will hasten the acetaminophen oxidation, extend the electrode's life, and shorten the reaction time needed to degrade the pharmaceutical and its intermediates/oxidation products. DC densities up to 9.5 mA/cm 2 can be supplied by photovoltaic cells.

show abstract

“…On the other hand, there was no increase in the degree of mineralization when the accumulated dose of UVA increased to 1277 kJ m -2 ( Figure 4a). It is probable that this stabilization occurs due to the formation of carboxylic acids of low molar mass, recalcitrant to oxidation, 48 and that also can form complexes with iron, reducing its concentration (Figure 4b). 49 Additionally the precipitation of iron ions is possible to occur since the oxalate ions tend to undergo degradation simultaneously with the organic load, and the resulting iron ions can undergo hydrolysis due to the high pH of the medium, forming insoluble species.…”

Section: Resultsmentioning

confidence: 99%

Strategy for Treating a Landfill Leachate by Integration of Physico-Chemical and Photo-Fenton Processes

Silva¹,

Júnior²,

Silva³

et al. 2017

J. Braz. Chem. Soc.

Self Cite

View full text Add to dashboard Cite

This study reports a protocol for the treatment of a sanitary landfill leachate through integration between a stage of coagulation-flocculation, a step of filtration of the resulting suspension, and application of the photo-Fenton process using a ferrioxalate complex and solar irradiation. The best results for turbidity removal by coagulation-flocculation were reached using Al 3+ as nitrate salt mainly using concentrations up close 4.4 mmol L -1 , at the natural pH of the effluent (pH 7.9), when the removal of 66% of the turbidity was achieved. By using a ferrioxalate complex after adjusting the pH of the effluent to 5, it was possible to circumvent the classical limitations of the Fenton process (related to the pH of the medium limited to between 2.5 and 3.0), performing a removal of 68% of the remaining dissolved organic carbon. The global dissolved organic carbon removal in this process was of 86% after a membrane filtration step before the photo-Fenton process.

show abstract

Paracetamol degradation intermediates and toxicity during photo-Fenton treatment using different iron species

Cited by 91 publications

References 37 publications

Some ozone advanced oxidation processes to improve the biological removal of selected pharmaceutical contaminants from urban wastewater

Some ozone advanced oxidation processes to improve the biological removal of selected pharmaceutical contaminants from urban wastewater

Degradation of Acetaminophen and Its Transformation Products in Aqueous Solutions by Using an Electrochemical Oxidation Cell with Stainless Steel Electrodes

Strategy for Treating a Landfill Leachate by Integration of Physico-Chemical and Photo-Fenton Processes

Contact Info

Product

Resources

About