Semi-permanent hair dyes degradation at W/WO3 photoanode under controlled current density assisted by visible light

Luciano Evangelista Fraga, Thais Tasso Guaraldo, Bárbara Camila De Araújo Souza, Maria Valnice Boldrin Zanoni

Research output: Contribution to journalArticlepeer-review

1 Citation (SciVal)

Abstract

The indiscriminate use of hair dyes has attracted great deal of attention due to its toxicological and mutagenic aspects demonstrated by some of these substances. Thus, the effluent from beauty salons and domestic sewages if not properly treated can reach water treatment plants and water sources, enhancing human health and environmental protection concern. This work explores the application of photoelectrocatalytic process on Basic Brown 16 and Basic Blue 99 degradation as model of basic hair dyes pollutants. W/WO3 electrode was used as photoanode under optimized conditions of 0.10 mol L-1 Na2SO4 as electrolytic solution, pH 2.0, under 1.25 mA cm-2 of controlled current density application and visible light irradiation. The process leads to complete color removal, and up to 59% and 44% mineralization of Basic Brown 16 and Basic Blue 99, respectively. The use of W/WO3 photoanodes under visible irradiation could assist on development of wastewater treatment technology.

Original languageEnglish
Article number20160168
JournalJournal of Advanced Oxidation Technologies
Volume20
Issue number2
DOIs
Publication statusPublished - 2 Jun 2017

Keywords

  • current density
  • photoelectrocatalytic process
  • semi-permanent hair dyes
  • visible light treatment
  • W/WO photoanode

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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