Vermiculite as heterogeneous catalyst in electrochemical Fenton-based processes: Application to the oxidation of Ponceau SS dye

Modified sodium vermiculite, an iron-rich clay mineral, has been used in novel heterogeneous electrochemical Fenton-based treatments, so-called electro-Fenton (EF)-vermiculite, UVA photoelectro-Fenton (PEF)-vermiculite and solar photoelectro-Fenton (SPEF)-vermiculite. Tests were made with 130 mL of...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2020-02, Vol.240, p.124838-124838, Article 124838
Main Authors: dos Santos, Alexsandro Jhones, Sirés, Ignasi, Alves, Ana P.M., Martínez-Huitle, Carlos A., Brillas, Enric
Format: Article
Language:English
Subjects:
Aluminum Silicates - chemistry
Azo Compounds - chemistry
Catalysis
Electrochemical Techniques - methods
Heterogeneous electro-Fenton
Heterogeneous Fenton
Heterogeneous photoelectro-Fenton
Mineral catalyst
Ponceau SS
Water treatment
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Summary:Modified sodium vermiculite, an iron-rich clay mineral, has been used in novel heterogeneous electrochemical Fenton-based treatments, so-called electro-Fenton (EF)-vermiculite, UVA photoelectro-Fenton (PEF)-vermiculite and solar photoelectro-Fenton (SPEF)-vermiculite. Tests were made with 130 mL of 0.150 mM Ponceau SS diazo dye in 0.050 M Na2SO4 at pH 3.0, in the presence of 1.0 g L−1 catalyst microparticles. The electrolyses were performed in an undivided cell with a boron-doped diamond anode (BDD) and air-diffusion cathode for H2O2 production, at 33.3 mA cm−2. Decolorization and mineralization were upgraded in the sequence: EF-vermiculite 
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2019.124838