Synergetic Photocatalytic Peroxymonosulfate Oxidation of Benzotriazole by Copper Ferrite Spinel: Factors and Mechanism Analysis

Overview

Journal Toxics

Date 2023 May 26

PMID 37235244

Authors

Masoumeh Golshan

Na Tian

Gcina Mamba

Babak Kakavandi

Affiliations

Soon will be listed here.

Abstract

The development of oxidation processes with the efficient generation of powerful radicals is the most interesting and thought-provoking dimension of peroxymonosulfate (PMS) activation. This study reports the successful preparation of a magnetic spinel of CuFeO using a facile, non-toxic, and cost-efficient co-precipitation method. The prepared material exhibited a synergetic effect with photocatalytic PMS oxidation, which was effective in degrading the recalcitrant benzotriazole (BTA). Moreover, central composite design (CCD) analysis confirmed that the highest BTA degradation rate reached 81.4% after 70 min of irradiation time under the optimum operating conditions of CuFeO = 0.4 g L, PMS = 2 mM, and BTA = 20 mg L. Furthermore, the active species capture experiments conducted in this study revealed the influence of various species, including OH, SO, O and in the CuFeO/UV/PMS system. The results showed that SO played a predominant role in BTA photodegradation. The combination of photocatalysis and PMS activation enhanced the consumption of metal ions in the redox cycle reactions, thus minimizing metal ion leaching. Additionally, this maintained the reusability of the catalyst with reasonable mineralization efficiency, which reached more than 40% total organic carbon removal after four batch experiments. The presence of common inorganic anions was found to have a retardant effect on BTA oxidation, with the order of retardation following: HCO > Cl > NO > SO. Overall, this work demonstrated a simple and environmentally benign strategy to exploit the synergy between the photocatalytic activity of CuFeO and PMS activation for the treatment of wastewater contaminated with widely used industrial chemicals such as BTA.

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