TY - JOUR
T1 - Heterogeneous Photodegradation for the Abatement of Recalcitrant COD in Synthetic Tanning Wastewater
AU - Toscanesi, Maria
AU - Russo, Vincenzo
AU - Medici, Antonio
AU - Giarra, Antonella
AU - Hmoudah, Maryam
AU - Di Serio, Martino
AU - Trifuoggi, Marco
N1 - Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/4
Y1 - 2022/4
N2 - Tannery wastewater is considered one of the most contaminated and problematic wastes since it consists of considerable amounts of organic and inorganic compounds. These contaminants result in high chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total suspended solids (TSS). In this work, the heterogeneous photodegradation of recalcitrant COD in wastewater from the tanning industry was investigated, in particular the recalcitrant COD due to the presence of vegetable tannins extracted from mimosa and chestnut and from synthetic tannins based on 4,4′ dihydroxy phenyl sulfone. TiO2 Aeroxide P‐25 was employed to study the photodegradation of model molecules in batch conditions under different parameters, namely initial concentration of COD, temperature, and catalyst dose. The maximum COD abatement reached was 60%. Additionally, preliminary kinetic investigation was conducted to derive the main kinetic parameters that can be useful for process scale‐up. It was found to be independent of the temperature value but linearly dependent on both catalyst loading and the initial COD value.
AB - Tannery wastewater is considered one of the most contaminated and problematic wastes since it consists of considerable amounts of organic and inorganic compounds. These contaminants result in high chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total suspended solids (TSS). In this work, the heterogeneous photodegradation of recalcitrant COD in wastewater from the tanning industry was investigated, in particular the recalcitrant COD due to the presence of vegetable tannins extracted from mimosa and chestnut and from synthetic tannins based on 4,4′ dihydroxy phenyl sulfone. TiO2 Aeroxide P‐25 was employed to study the photodegradation of model molecules in batch conditions under different parameters, namely initial concentration of COD, temperature, and catalyst dose. The maximum COD abatement reached was 60%. Additionally, preliminary kinetic investigation was conducted to derive the main kinetic parameters that can be useful for process scale‐up. It was found to be independent of the temperature value but linearly dependent on both catalyst loading and the initial COD value.
KW - advanced oxidation processes
KW - tanning industry
KW - vegetable and synthetic tannins
KW - wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85127643117&partnerID=8YFLogxK
U2 - 10.3390/chemengineering6020025
DO - 10.3390/chemengineering6020025
M3 - Article
AN - SCOPUS:85127643117
SN - 2305-7084
VL - 6
JO - ChemEngineering
JF - ChemEngineering
IS - 2
M1 - 25
ER -