Photocatalytic and photo-Fenton-like degradation of methylparaben on monolith-supported perovskite-type catalysts

ABSTRACT

Methylparaben was degraded in the presence of ABO₃ perovskite catalysts (A: La, Bi, and B: Ti-Fe, Fe) synthesized on a monolithic structure using the sol–gel method. The catalysts were characterized by BET, SEM, XRD, and FTIR. The highest degradation was observed using BiFeO₃ on the monolithic structure. The methylparaben degradation and iron leaching were 82.8% and 0.06 ppm, respectively, under the optimum conditions, which were pH=7, [H₂O₂]₀=0.5 mM, and 0.1 g/L BiFeO₃ loading. The toxicity tests were carried out by cress seeds and 1.09% inhibition was observed. Methylparaben degradation followed the second-order reaction kinetics, whereas the activation energy was 54 kJ/mol.

KEYWORDS:

• Methylparaben
• monolith
• perovskite
• photocatalytic oxidation

Funding

This work was supported by Science and Technological Research Council of Turkey (project no:114 M 080) and the Ege University Science and Technology Centre-Technology Transfer Office (project no: 15 BIL 015).

Additional information

Funding

This work was supported by Science and Technological Research Council of Turkey (project no:114 M 080) and the Ege University Science and Technology Centre-Technology Transfer Office (project no: 15 BIL 015).