Abstract
The objective of this work was to evaluate the removal of ibuprofen (IBP) using the oxidants hydrogen peroxide (H2O2) and sodium persulfate (Na2S2O8). The ability of magnetite (Fe3O4) to activate persulfate (PS) and H2O2 for the oxidation of IBP at near neutral pH was evaluated as well. The use of soluble Fe2+ to activate H2O2 and Na2S2O8 was also investigated. H2O2 and Na2S2O8 were inactive during the sixty-minute experiments when used alone. However, activation using Fe2+ increased the removal to 95% in the presence of H2O2 (Fenton reaction) and 63% in the presence of Na2S2O8 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 H2O2 and PS by Fe3O4 was only observed at a high oxidant concentration and over 48h of reaction time. A second order rate kinetic constant was determined for H2O2 (3.0∗10−3M−1s−1) and Na2S2O8 (1.59∗10−3M−1s−1) in the presence of Fe3O4. Finally, several of the degradation products formed during oxidation of IBP in the presence of H2O2 and Na2S2O8 (activated by Fe2+) were identified. These include oxalic acid, pyruvic acid, formic acid, acetic acid, 4-acetylbenzoic acid, 4-isobutylacetophenone (4-IBAP) and oxo-ibuprofen.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
