Fuel station effluent treatment by electrochemical technology

Patrícia Rachel Fernandes Da Costa, Djalma Ribeiro Da Silva, Carlos Alberto Martínez-Huitle, Sergio GARCIA SEGURA

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

In this work, a real effluent from oil-water separator of fuel station has been treated for the first time by electrochemical oxidation (EO) process. Electrochemical experiments were carried out under real discharged effluent conditions using Ti/Pt and Ti/IrO2-Ta2O5 anodes at different supporting electrolytesin order to study the influence of the different oxidants electrogenerated. The effect of applied current densities (j = 10, 20 and 30 mA cm- 2) was also evaluated. Results showed that good performances were achieved using Ti/Pt anode adding K2SO4 as supporting electrolyte to improve the solution conductivity. Dissolved organic carbon (DOC) and chemical oxygen demand (COD) abatements of 55.2% and 61.5% were achieved, reducing significant concentration of organic compounds (in terms of benzene-toluene-ethylbenzene-xylene (BTEX) and total petroleum hydrocarbons (TPHs)) at j = 30 mA cm- 2 after only 4 h of electrochemical treatment. Affordable costs of process expenditure of US$ 3.79 m- 3 were also achieved using Ti/Pt anodes; however, these costs could be reduced increasing the solution conductivity. The figures obtained in this investigation provide valuable information for developing of electrochemical technologies to their real application in order to propose a pre or post treatment alternative.

Original languageEnglish (US)
Pages (from-to)97-103
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume763
DOIs
StatePublished - Feb 15 2016
Externally publishedYes

Keywords

  • Anodic oxidation
  • Btex
  • DSA
  • Fuel station
  • TPH
  • Wastewater treatment

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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