Automated System for Study of the Crystal Violet Mineralization in Water by the Electro-Fenton Method

C.I. Alexandru, M.C. Branzila, I. Siminiceanu

Abstract

The mineralization of acidic aqueous solutions with 0.166 to 1.333 mM Crystal Violet (CV) in 50 mM Na2SO4, as background electrolyte has been studied by the electro- Fenton method, where the oxidizing hydroxyl radicals were produced from the Fenton reaction between added ferrous ions and hydrogen peroxide generated at a oxygen- diffusion cathode. The influence of six operating factors on the mineralization degree has been investigated: anode material (platinum versus boron doped diamond), pH, Fe (II) dose, current intensity, temperature and initial concentration of CV. The mineralization degree had a maximum (91.18%) after 420 minutes of electrolysis, under the following optimal conditions: boron doped diamond (BDD) anode, pH3, 1mMFe (II), 300 mA, 308 K, and 100 ppm initial total organic carbon (TOC).

Keywords

crystal violet, mineralization degree, BDD anode, experimental study

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DOI

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IMEKO TC

TC19 - Environmental Measurements

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