Removal of micropollutants and NOM in carbon nanotube-UF membrane system from seawater

Jiyong Heo, Lesley Joseph, Yeomin Yoon, Yong Gyun Park, Namguk Her, Jinsik Sohn, Seong Hoon Yoon

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


One of the main problems for seawater reverse osmosis desalination is membrane fouling associated with natural organic matter. Bisphenol-A (BPA) and 17α-ethinylestradiol (EE2) are well-known endocrine-disrupting compounds that have been detected in wastewater and seawater. In this study, the contribution of carbon nanotubes (CNTs, single-walled carbon nanotubes) to membrane fouling control and the potential adsorption mechanisms of BPA and EE2 were investigated using artificial seawater (ASW) in a bench scale ultrafiltration (UF) membrane coupled with CNTs. For high ionic strength ASW, UVA 254 nm is a good alternative for highly aromatic dissolved organic carbon (DOC) determination, with a very strong linear relationship (R 2 ≥ 0.99) with increasing DOC concentrations. Approximately 80% of DOC in ASW was rejected by the CNT-UF system where 31% of DOC was removed due to adsorption by CNTs. The presence of CNTs shows a 20% increase in membrane flux in ASW. A strong linear correlation between retention and adsorption of BPA and EE2 was obtained. The percentage of adsorption/retention of BPA and EE2 in UF-CNTs follows the order: 94.0/96.6 (DI + CNTs, EE2) > 86.2/90.0 (ASW + CNTs, EE2) > 73.6/78.9 (DI + CNTs, BPA) ≥ 74.1/77.3 (ASW + CNTs, BPA) > 29.8/29.8 (ASW, EE2) ≅ 27.3/27.3 (ASW, BPA) ≥ 25.3/25.3 (DI, EE2) ≅ 24.8/24.8 (DI, BPA). This indicates that retention by the UF-CNT system is mainly due to adsorption. Overall, EE2 adsorption was greater than BPA during the UF-CNT experiments, presumably due to the higher hydrophobicity of EE2 than BPA.

Original languageEnglish
Pages (from-to)2737-2744
Number of pages8
JournalWater Science and Technology
Issue number11
StatePublished - 2011


  • 17α-ethinylestradiol
  • Adsorption
  • Artificial seawater
  • Bisphenol A
  • Carbon nanotubes
  • Retention
  • Ultrafiltration


Dive into the research topics of 'Removal of micropollutants and NOM in carbon nanotube-UF membrane system from seawater'. Together they form a unique fingerprint.

Cite this