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dc.contributor.authorCalzadilla, Wendy
dc.contributor.authorEspinoza, Lorena Carolina
dc.contributor.authorDíaz-Cruz, M. Silvia
dc.contributor.authorSunyer, Adrià
dc.contributor.authorAranda, Mario B.
dc.contributor.authorPeña-Farfal, Carlos
dc.contributor.authorSalazar, Ricardo
dc.date.accessioned2020-11-11T17:49:50Z
dc.date.available2020-11-11T17:49:50Z
dc.date.issued2020-10-26
dc.identifier10.1016/j.chemosphere.2020.128753
dc.identifier.issn00456535
dc.identifier.urihttps://hdl.handle.net/20.500.12728/7173
dc.description.abstractThe anodic oxidation (AO) of 30 pharmaceuticals including antibiotics, hormones, antihistaminics, anti-inflammatories, antidepressants, antihypertensives, and antiulcer agents, in solutions containing different supporting electrolytes media (0.05 M Na2SO4, 0.05 M NaCl, and 0.05 M Na2SO4 + 0.05 M NaCl) at natural pH was studied. A boron-doped diamond (BDD) electrode and a stainless-steel electrode were used as anode and cathode, respectively, and three current densities of 6, 20, and 40 mA cm−2 were applied. The results showed high mineralization rates, above 85%, in all the tested electrolytic media. 25 intermediaries produced during the electrooxidation were identified, depending on the supporting electrolyte together with the formation of carboxylic acids, NO3−, SO42− and NH4+ ions. The formation of intermediates in chloride medium produced an increase in absorbance. Finally, a real secondary effluent spiked with the 30 pharmaceuticals was treated by AO applying 6 mA cm−2 at natural pH and without addition of supporting electrolyte, reaching c.a. 90% mineralization after 300 min, with an energy consumption of 18.95 kW h m−3 equivalent to 2.90 USD m−3. A degradation scheme for the mixture of emerging contaminants in both electrolytic media is proposed. Thus, the application of anodic oxidation generates a high concentration of hydroxyl radicals that favors the mineralization of the pharmaceuticals present in the spiked secondary effluent sample.es_ES
dc.language.isoenes_ES
dc.publisherElsevier Ltdes_ES
dc.subjectAnodic oxidationes_ES
dc.subjectBoron-doped diamond electrodees_ES
dc.subjectHydroxyl radicales_ES
dc.subjectPharmaceuticalses_ES
dc.subjectSecondary effluentes_ES
dc.titleSimultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-productses_ES
dc.typeArticlees_ES


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