TY - JOUR
T1 - Continuous Heterogeneous Fenton-Type Process for Dye Pollution Abatement Intensified by Hydrodynamic Cavitation
AU - Salierno, Gabriel
AU - Napoleone, Stefanía
AU - Maisterrena, María Agustina
AU - Cassanello, Miryan
AU - Pellasio, Maximiliano
AU - Doumic, Lucila
AU - Ayude, María Alejandra
N1 - Funding Information:
Financial support from CONICET (PIP 00902/2015), UBA (UBACyT 20020170100604BA), UNMdP, and ANPCyT (PICT 2016-0083, PICT 2017-3138, PICT 2019-0955) is gratefully acknowledged.
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/11/24
Y1 - 2021/11/24
N2 - The heterogeneous Fenton-type process was investigated in a continuous upflow fixed-bed reactor (UFBR) of a nano Prussian Blue catalyst supported on γ-alumina beads. Temperature and oxidant concentration strongly increased dye discoloration and total organic carbon (TOC) conversion. The long-term stability of the catalyst was confirmed. The best performance was found with a residence time of 2 min at 353 K and an inlet hydrogen peroxide concentration twice the stoichiometric one required for mineralization, attaining complete discoloration and 45% TOC conversion. The formed reactive species continued the reaction after leaving the UFBR. Hydrodynamic cavitation (HC) of the collected outlet stream led immediately to complete discoloration and doubled the TOC conversion in 40 min. Short-chain carboxylic acids accounted for about 70% of the remaining TOC. The UFBR in-series with the HC reactor led to complete discoloration and intensified the TOC conversion. The subsequent HC step thoroughly consumed the remnant oxidant, increasing its efficiency.
AB - The heterogeneous Fenton-type process was investigated in a continuous upflow fixed-bed reactor (UFBR) of a nano Prussian Blue catalyst supported on γ-alumina beads. Temperature and oxidant concentration strongly increased dye discoloration and total organic carbon (TOC) conversion. The long-term stability of the catalyst was confirmed. The best performance was found with a residence time of 2 min at 353 K and an inlet hydrogen peroxide concentration twice the stoichiometric one required for mineralization, attaining complete discoloration and 45% TOC conversion. The formed reactive species continued the reaction after leaving the UFBR. Hydrodynamic cavitation (HC) of the collected outlet stream led immediately to complete discoloration and doubled the TOC conversion in 40 min. Short-chain carboxylic acids accounted for about 70% of the remaining TOC. The UFBR in-series with the HC reactor led to complete discoloration and intensified the TOC conversion. The subsequent HC step thoroughly consumed the remnant oxidant, increasing its efficiency.
U2 - 10.1021/acs.iecr.1c02571
DO - 10.1021/acs.iecr.1c02571
M3 - Article
AN - SCOPUS:85119432660
SN - 0888-5885
VL - 60
SP - 16653
EP - 16664
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 46
ER -