Electro-Fenton, UVA photoelectro-Fenton and solar photoelectro-Fenton degradation of the drug ibuprofen in acid aqueous medium using platinum and boron-doped diamond anodes

Skoumal, Marcel; Rodrı́guez, Rosa Marı́a; Cabot, Pere Lluı́s; Centellas, Francesc; Garrido, José Antonio; Arias, Conchita; Brillas, Enric

doi:10.1016/j.electacta.2008.07.014

Cited by 221 publications

(97 citation statements)

References 38 publications

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“…As illustrated in Fig. 5, the removal of IBP by H 2 O 2 alone is minimal (~20%) which is in agreement with previous studies (Méndez-Arriaga et al, 2010;Skoumal et al, 2009). Conversely, H 2 O 2 oxidation is significantly enhanced by the presence of Fe 3 O 4 (~60%).…”

Section: Kinetic Of Ibp Removal Using Fe 3 Osupporting

confidence: 91%

“…Oxalic acid is mainly formed from the oxidative breakdown of the aryl moiety of aromatics and is largely formed from oxidation of pyruvic and acetic acid. oxalic acid, formic acid is an ultimate carboxylic acid since it is directly transformed into CO 2 (Adams et al, 2005;Skoumal et al, 2009). Due to the low concentration of the degradation products relative to the limit of detection of the HPLC method used, it was not possible to investigate the persistence of the degradation products formed.…”

Section: Cod Abatement Vs Time and Identification Of Degradation Promentioning

confidence: 99%

“…Simple, efficient and cost-effective treatment options for the wash-water of vessels used in the production process of IBP-containing pills will thus become essential to the pharmaceutical industry. Various oxidation processes have been investigated for the removal of IBP in water but their efficiencies of removal have varied from no removal to complete removal (Caviglioli et al, 2002;Huber et al, 2003Huber et al, , 2005Lee and von Gunten, 2009;Madhavan et al, 2010;Méndez-Arriaga et al, 2010Skoumal et al, 2009). Furthermore, toxic transformation products were formed in a few cases (Caviglioli et al, 2002;Madhavan et al, 2010;Méndez-Arriaga et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…All past research pertaining to the removal of IBP by the Fenton process only considered using soluble Fe 2+ (traditional Fenton's reagent) and in most of these studies, low pH conditions (pHb 4) were required to prevent the precipitation of iron (Méndez-Arriaga et al, 2010;Skoumal et al, 2009). Unlike the classical Fenton process, the reaction of Fe-bearing minerals with hydrogen peroxide (H 2 O 2 ) can effectively improve the oxidation of organic molecules at circumneutral pH.…”

Section: Introductionmentioning

confidence: 99%

“…This has been demonstrated for other contaminants such as 2,4,6-trinitrotoluene and phenol (Matta et al, 2007(Matta et al, , 2008a(Matta et al, , 2008b but has yet to be shown for IBP. The degradation of pharmaceutical compounds by Fenton's reagent and a Fenton-like system has also been reported at acidic conditions (Goi et al, 2008;Hofmann et al, 2007;Méndez-Arriaga et al, 2010;Skoumal et al, 2009). However the removal of IBP at neutral pH, which is less abrasive to the environment, would be more appealing for applications in the treatment of wastewater or wash water that is produced in IBP processing plants.…”

Section: Introductionmentioning

confidence: 99%

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Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Sabri

Hanna

Yargeau

2012

Science of The Total Environment

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The objective of this work was to evaluate the removal of ibuprofen (IBP) using the oxidants hydrogen peroxide (H 2 O 2 ) and sodium persulfate (Na 2 S 2 O 8 ). The ability of magnetite (Fe 3 O 4 ) to activate persulfate (PS) and H 2 O 2 for the oxidation of IBP at near neutral pH was evaluated as well. The use of soluble Fe 2+ to activate H 2 O 2 and Na 2 S 2 O 8 was also investigated. H 2 O 2 and Na 2 S 2 O 8 were inactive during the sixty-minute experiments when used alone. However, activation using Fe 2+ increased the removal to 95% in the presence of H 2 O 2 (Fenton reaction) and 63% in the presence of Na 2 S 2 O 8 at pH 6.6. Chemical oxygen demand (COD) removal was also greater for Fenton oxidation (65%) than for iron-activated PS oxidation (25%). Activation of H 2 O 2 and PS by Fe 3 O 4 was only observed at a high oxidant concentration and over 48 h of reaction time. A second order rate kinetic constant was determined for H 2 O 2 (3.0 * 10 − 3 M − 1 s − 1 ) and Na 2 S 2 O 8 (1.59 * 10 − 3 M − 1 s − 1 ) in the presence of Fe 3 O 4 . Finally, several of the degradation products formed during oxidation of IBP in the presence of H 2 O 2 and Na 2 S 2 O 8 (activated by Fe 2+ ) were identified. These include oxalic acid, pyruvic acid, formic acid, acetic acid, 4-acetylbenzoic acid, 4-isobutylacetophenone (4-IBAP) and oxo-ibuprofen.

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Section: Kinetic Of Ibp Removal Using Fe 3 Osupporting

confidence: 91%

Section: Cod Abatement Vs Time and Identification Of Degradation Promentioning

confidence: 99%