Removal of estrogens by electrochemical oxidation process

Vo Huu Cong, Sota Iwaya, Yutaka Sakakibara

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11 Citations (Scopus)

Abstract

Treatments of estrogens such as Estrone (E1), Estradiol (E2) and Ethinylestradiol (EE2) were conducted using an electrolytic reactor equipped with multi-packed granular glassy carbon electrodes. Experimental results showed that E1, E2 and EE2 were oxidized in the range of 0.45-0.85 V and were removed through electro-polymerization. Observed data from continuous experiments were in good agreement with calculated results by a mathematical model constructed based on mass transfer limitation. In continuous treatment of trace estrogens (1 μg/L), 98% of E1, E2 and EE2 were stably removed. At high loading rate (100 μg/L), removal efficiency of E1 was kept around 74%-88% for 21 days, but removal efficiency reduced due to passivation of electrodes. However, removal efficiency was recovered after electrochemical regeneration of electrodes in presence of ozone. Electric energy consumption was observed in the range of 1-2 Wh/m3. From these results, we concluded that the present electrochemical process would be an alternative removal of estrogens.

Original languageEnglish
Pages (from-to)1355-1360
Number of pages6
JournalJournal of Environmental Sciences (China)
Volume26
Issue number6
DOIs
Publication statusPublished - 2014 Jun 1

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Keywords

  • Electro-polymerization
  • Electrode regeneration
  • Endocrine disrupting chemicals
  • Estrogen
  • Granular reactor

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Environmental Science(all)

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