Carabin, Anne; Drogui, Patrick 
ORCID: https://orcid.org/0000-0002-3802-2729 et Robert, Didier
(2015).
Photo-degradation of carbamazepine using TiO2 suspended photocatalysts.
Journal of the Taiwan Institute of Chemical Engineers
, vol. 54
.
pp. 109-117.
DOI: 10.1016/j.jtice.2015.03.006.
Résumé
Carbamazepine (CBZ), a persistent pharmaceutical compound, cannot be effectively removed (<10%) by conventional wastewater treatment plants. This study investigates the removal of this molecule in water solution using a photocatalytic process at 365 nm. Five commercial TiO₂-based photocatalysts (P90, P25, UV100, PC500, and ST01) were tested over a range of operating parameters (type and concentration of photocatalysts, pH, treatment time, and light intensity). The best operating conditions for CBZ degradation in solution (99% CBZ removal) were obtained using P90 as photocatalyst at a concentration of 1.5 g/L for 90 min of treatment with a pH of 5.0 and a light intensity of 18.9 W/m². Under these conditions, removal of 74% of total organic carbon was recorded. This optimized photocatalytic process can treat either relatively high concentrations of CBZ (5 mg/L to 20 mg/L) or low concentrations of CBZ (37 µg/L) in water. The initial rate of photocatalytic degradation of CBZ using P90 as photocatalyst can be described by the Langmuir–Hinshelwood (L–H) kinetic model with a reaction rate constant of 2.22 ± 0.003 mg/L/min at ca. 20 °C.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | photocatalysis; catalyst P90; carbamazepine; adsorption; kinetic; advanced oxidation process |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 19 avr. 2018 18:55 |
| Dernière modification: | 23 févr. 2022 19:27 |
| URI: | https://espace.inrs.ca/id/eprint/3816 |
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