Use of direct photolysis and H2O2/UV in aqueous solution containing the crystal violet dye

Authors

  • Lucas Rafael Carneiro da Silva Universidade Federal do Piauí
  • Thalena Lima da Silva Universidade Federal do Piauí
  • Francisca Pereira de Araújo Universidade Federal do Piauí
  • Edson Cavalcanti da Silva Filho Universidade Federal do Piauí
  • Josy Anteveli Osajima Universidade Federal do Piauí

DOI:

https://doi.org/10.14295/holos.v17i1.12211

Keywords:

Dye. Photolysis. Hydrogen peroxide. Aqueous solution. Crystal violet.

Abstract

In this work, the Crystal Violet (CV) dye discoloration was investigated by direct photolysis and photoassisted peroxidation in a reactor open to the atmosphere under UV irradiation, having as source of radiation a lamp without bulb mercury vapor of 125W E27. The optimal range of photolysis of VC dye was 7,0 x 10-6 mol.L-1, featuring a percentage of discoloration around 12, 37 and 25% larger compared to the other concentrations, and the monitoring of the variation of the Absorbance x Time (min) through the curves confirmed that in fact this was the concentration that most discolored. The effect of H2O2 on discoloration of the aqueous dye solution at 9,0 x 10-6 mol.L-1 was analyzed, and it was concluded that the addition of this oxidant it benefited the photolysis process.

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Published

2017-11-23

How to Cite

Carneiro da Silva, L. R., Lima da Silva, T., Pereira de Araújo, F., Filho, E. C. da S., & Osajima, J. A. (2017). Use of direct photolysis and H2O2/UV in aqueous solution containing the crystal violet dye. Holos Environment, 17(1), 138–148. https://doi.org/10.14295/holos.v17i1.12211

Issue

Vol. 17 No. 1 (2017)

Section

Artigos

License

Os artigos publicados são de responsabilidades dos autores.