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

Autor: Troncoso, Franco David, Tonetto, Gabriela Marta
Zdroj: Sustainable Environment Research (2468-2039); 10/19/2021, Vol. 31 Issue 1, p1-14, 14p
Abstrakt: In this work, the degradation of methylene blue (MB) in aqueous solution by a heterogeneous Fenton-like process was studied. Nb2O5 supported on an anodized aluminum monolith was used as catalyst. The Nb2O5 coating generated during the catalyst synthesis was uniform and porous, with a thickness of 7 μm. Response surface methodology was used to study the relationship between process variables and MB degradation and chemical oxygen demand (COD) reduction. The optimal operating conditions were: initial MB concentration of 45 mg L− 1, initial H2O2 concentration in the reaction medium of 40 mM, catalyst loading of 7.85 kg Nb 2 O 5 m− 3, and pH 4, reaching a MB degradation of 98% and a COD reduction of 79% at 150 min. The high activity of the Nb2O5 monolith catalyst remained constant after 10 catalytic tests. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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