Perfluorooctanoic acid (PFOA) removal by flotation with cationic surfactants

Yueh Feng Li, Wei Yi Chien, Yu Jung Liu, Yu Chi Lee, Shang Lien Lo, Ching Yao Hu

Research output: Contribution to journalArticlepeer-review

Abstract

Perfluorooctanoic acid (PFOA) was separated and recovered using a foam flotation process aided by cationic surfactants. The PFOA removal efficiency was in the following decreasing order: OTAB (C8TAB) > DTAB (C10TAB) > CTAB (C16TAB) > TBAB, which indicates that cationic surfactants with an alkyl chain that had a similar length to that of PFOA had higher affinities to PFOA. PFOA removal slightly decreased with increasing ionic strength of the surfactant but did not change with the pH. PFOA could be completely removed in 20 min with 1.25 mM of OTAB in actual wastewater. The energy yield value of foam flotation with a cationic surfactant was much higher than those of other methods, which means that using foam flotation with a cationic surfactant as the collector is a simple, fast, and energy-efficient method to separate and recover PFOA from dilute water solutions.

Original languageEnglish
Article number128949
JournalChemosphere
DOIs
Publication statusPublished - Mar 2021

Keywords

  • Cationic surfactant
  • Energy yield value (G)
  • Foam flotation process
  • Perfluorooctanoic acid (PFOA)

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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