Papers by Bernardí Bayarri
Catalysis Today, 2014
In this study UV/H 2 O 2 , photo-Fenton and photocatalysis (TiO 2 ) were used to degrade metoprol... more In this study UV/H 2 O 2 , photo-Fenton and photocatalysis (TiO 2 ) were used to degrade metoprolol tartrate salt (MET) in aqueous solution. This study investigates the variation of different parameters such as MET concentration, total organic carbon (TOC), chemical oxygen demand (COD) per accumulated energy (determined by actinometries), analyzing the performance of the different set-ups tested. First order apparent rate constants were calculated for the systems. Nearly total MET removal was achieved through the three technologies tested, the UV/H 2 O 2 system being more efficient for MET degradation. On the other hand, the kinetic study indicated that TiO 2 photocatalysis seems to be one step ahead of the others when assessing the mineralization and the overall oxidation of the solution for a specific amount of accumulated energy (18 kJ/L). The acute toxicity measured by the inhibition percentage of bioluminescence from Vibrio fischeri indicates that all the processes tested promote the toxicity reduction for this target compound. The major reaction intermediates in the three processes were identified by ionization/mass spectrometry.
Catalysis Today, 2013
In this study the o-nitrobenzaldehyde (o-NB) actinometry is used to measure the photon flow enter... more In this study the o-nitrobenzaldehyde (o-NB) actinometry is used to measure the photon flow entering a photocatalytic reactor. Two different proposed methods in bibliography are adapted and compared: by following pH or o-NB concentration. In addition, it was studied the influence of suspended TiO 2 particles, inside the photoreactor, on the o-NB actinometry. Particularly, the appearance of photocatalytic products was followed during actinometries with suspended TiO 2 . It seems that these photocatalytic products do not come from the o-NB photocatalysis, but from the photocatalytic reaction of its photo-product (o-nitrosobenzoic acid), catalyzed by TiO 2 . Therefore, this actinometry, following the o-NB concentration, can be used in the presence of suspended TiO 2 to determine the apparent photon flow entering a photoreactor or apply it to suitable models.
Chemical Engineering Journal, 2016
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Papers by Bernardí Bayarri