Influence of the medium pH on the catalytic activity of the CuO-based catalyst in the Fenton system

Editorial Board PCSS Journal; Olena Makido; Galyna Khovanets'; Oksana Kurylets

doi:10.15330/pcss.26.2.235-239

Authors

Olena Makido Department of Physical Chemistry of Fossil Fuels of the Institute of Physical–Organic Chemistry and Coal Chemistry named after L. M. Lytvynenko of the National Academy of Sciences of Ukraine, Lviv, Ukraine
Galyna Khovanets' Department of Physical Chemistry of Fossil Fuels of the Institute of Physical–Organic Chemistry and Coal Chemistry named after L. M. Lytvynenko of the National Academy of Sciences of Ukraine, Lviv, Ukraine
Oksana Kurylets Lviv Polytechnic National University, Lviv, Ukraine

DOI:

https://doi.org/10.15330/pcss.26.2.235-239

Keywords:

SiO2/CoFe2O4/SiO2/CuO catalyst, Fenton system, medium pH, oxidation of methylene blue, reaction mechanism

Abstract

The influence of the medium pH on the activity of the heterogeneous nanostructured magnetically sensitive catalyst SiO₂/CoFe₂O₄/SiO₂/CuO in the Fenton system was investigated and the reaction mechanism was proposed. It was determined that the catalytic centers are Cu⁺ and Cu²⁺. It was established that the rate of destruction of the dye methylene blue (MB) as a model wastewater pollutant in the first 20 min of the process depends on pH, and its value decreases in the pH range (9)>(6)>(3). After 2 h, for all initial pH values, the degree of MB destruction reaches 85-90%, and the pH changes to neutral. The proposed system can be used in the technology of post-treatment of industrial and domestic wastewater.

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