Combined ultrasonication and electrokinetic remediation for persistent organic removal from contaminated kaolin

Thuy Duong Pham, Reena Amatya Shrestha, Jurate Virkutyte, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)

Abstract

Electrokinetics alone (EK) and ultrasonically enhanced electrokinetics (EK-US) tests were studied to compare and examine the combining effects of these two methods on the removal of the three persistent organic pollutants (POPs): hexachlorobenzene (HCB), phenanthrene (PHE) and fluoranthene (FLU) from kaolin. Two pair tests were conducted into two experiments with different initial low (100 mg/kg) and high (500 mg/kg) contaminant concentrations. Results from the experiments show that, generally, EK-US tests have higher electroosmotic flow, higher current and better performance than EK alone tests. However, ultrasonic enhancement can increase the removal rate only up to about 10% more. Among the three POPs, HCB is the most difficult to treat because of its very stable structure while the other two PAHs are easier to remove.

Original languageEnglish
Pages (from-to)1403-1407
Number of pages5
JournalElectrochimica Acta
Volume54
Issue number5
DOIs
Publication statusPublished - 1 Feb 2009
Externally publishedYes

Keywords

  • Electrokinetics
  • Persistent organic pollutants
  • Soil remediation
  • Ultrasound

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electrochemistry

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