Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment

TRONCOSO F.; TONETTO G.

Sustainable Environment Research

Chinese Institute of Environmental Engineering (CIEnvE)

Año: 2021

2468-2039

Inthis work, the degradation of methylene blue (MB) in aqueous solution by aheterogeneous Fenton-like process was studied. Nb2O5supported on an anodized aluminum monolith was used as catalyst. The Nb2O5coating generated during the catalyst synthesis was uniform and porous, with athickness of 7 µm. Response surface methodology was used to study therelationship between process variables and MB degradation and chemical oxygendemand (COD) reduction. The optimal operating conditions were: initial MBconcentration of 45 mg L-1, initial H2O2concentration in the reaction medium of 40 mM, catalyst loading of 7.85  m-3, and pH 4, reaching a MBdegradation of 98% and a COD reduction of 79% at 150 min. The high activity ofthe Nb2O5 monolith catalyst remained constant after 10catalytic tests.