Removal of metoprolol by means of photo-oxidation processes
Por:
Aviles-Garcia, Osmin, Espino-Valencia, Jaime, Mendoza-Zepeda, Arisbeht, Donkor, Kingsley, Brewer, Sharon, Romero, Rubi, Natividad, Reyna
Publicada:
1 ago 2022
Resumen:
In this study, beta-blocker metoprolol was degraded by photocatalysis
and photo-Fenton catalyzed by doped TiO2. The effect of two main
variables was elucidated, content and type of doping cation (Fe or Cu).
The catalysts were synthesized by Evaporation-Induced Self-Assembly
(EISA) method and their performance was compared with typical Degussa
P25. All synthesized materials were found to be mesoporous with a
specific surface in the range of 121-242 m(2)/g, they all exhibited
anatase phase, and crystallites in the range of 6-10 nm. The use of
X-ray photoelectron spectroscopy (XPS) allowed to establish not only the
presence of the expected Ti4+ but also Ti3+ species. Cu2+ and Fe3+
species were also identified in the doped catalysts. It was found that
the addition of Cu and Fe diminished the energy band gap of synthesized
TiO2, from 3.20 eV to 2.58 and 2.64, respectively. The content of Cu is
directly correlated with this effect. In photocatalysis, the doping of
TiO2 did not have an effect of metoprolol degradation rate. This was
improved, however, approximately 60% by the synthesized TiO2 compared
to Degussa P25. On the other hand, the photo-Fenton-like process
catalyzed by Cu-TiO2 exhibited the highest degradation (total removal)
and mineralization extent (90%), being faster than the photocatalytic
process and the UV-H2O2 system. Another difference between both methods,
was the amount and type of intermediates generated. These were
identified by LC-MS. Photo-Fenton catalyzed by Cu/TiO2 can be considered
as an effective process with high oxidative power in the metoprolol
degradation.
Filiaciones:
Aviles-Garcia, Osmin:
Univ Autonoma Estado Mexico, Ctr Conjunto Invest Quim Sustentable, Chem Engn Lab, UAEM UNAM, Km 14-5 Toluca Atlacomulco Rd, Toluca 50200, Estado De Mexic, Mexico
Espino-Valencia, Jaime:
Univ Michoacana, Fac Ingn Quim, Edif 6,Ciudad Univ, Morelia 58060, Michoacan, Mexico
Mendoza-Zepeda, Arisbeht:
Univ Autonoma Estado Mexico, Ctr Conjunto Invest Quim Sustentable, Chem Engn Lab, UAEM UNAM, Km 14-5 Toluca Atlacomulco Rd, Toluca 50200, Estado De Mexic, Mexico
Donkor, Kingsley:
Thompson Rivers Univ, Fac Sci, Dept Phys Sci Chem, 805 TRU Way, Kamloops, BC V2C 0C8, Canada
Brewer, Sharon:
Thompson Rivers Univ, Fac Sci, Dept Phys Sci Chem, 805 TRU Way, Kamloops, BC V2C 0C8, Canada
Romero, Rubi:
Univ Autonoma Estado Mexico, Ctr Conjunto Invest Quim Sustentable, Chem Engn Lab, UAEM UNAM, Km 14-5 Toluca Atlacomulco Rd, Toluca 50200, Estado De Mexic, Mexico
Natividad, Reyna:
Univ Autonoma Estado Mexico, Ctr Conjunto Invest Quim Sustentable, Chem Engn Lab, UAEM UNAM, Km 14-5 Toluca Atlacomulco Rd, Toluca 50200, Estado De Mexic, Mexico
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