Treatment of phthalic acid esters by electrocoagulation with stainless steel electrodes using dimethyl phthalate as a model compound

Işik Kabdaşli*, Asuman Keleş, Tuǧba Ölmez-Hanci, Olcay Tünay, Idil Arslan-Alaton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

In this study, treatment of phthalates by electrocoagulation employing stainless steel electrodes was investigated using dimethyl phthalate (DMP) as a model compound. DMP was completely destructed within 30 min up to the high initial concentration of 100 mg/L while total mineralization was also obtained within a couple of hours. The applied current density of 22.5 mA/cm2 and electrolyte (NaCl) concentrations varying between 1000 and 1500 mg/L as chloride resulted in the highest treatment performance. The initial solution pH (2-6) had practically no effect on the process efficiency. Desorption experiments and the reaction rates obtained for DMP, COD and TOC abatements appeared to be a strong evidence of an oxidative removal mechanism. DMP removal fitted first order kinetics. COD and TOC removals began after the total DMP removal and also fitted first order kinetics. Activated sludge inhibition experiments revealed that toxicity could be significantly reduced by electrocoagulation application.

Original languageEnglish
Pages (from-to)932-940
Number of pages9
JournalJournal of Hazardous Materials
Volume171
Issue number1-3
DOIs
Publication statusPublished - 15 Nov 2009

Keywords

  • Activated sludge inhibition
  • Dimethyl phthalate
  • Electrocoagulation
  • Endocrine disrupting compound
  • Reaction kinetics
  • Specific energy consumption
  • Stainless steel electrodes

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