Adsorption of carbamazepine by carbon nanotubes: Effects of DOM introduction and competition with phenanthrene and bisphenol A

Ilya Lerman, Yona Chen, Baoshan Xing, Benny Chefetz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

87 Scopus citations

Abstract

Carbon nanotubes, organic contaminants and dissolved organic matter (DOM) are co-introduced into the environment. Thus, the interactions between these components have to be evaluated to better understand their environmental behavior. In this study, single-walled carbon nanotubes (SWCNTs) were used as sorbent, carbamazepine was the primary adsorbate, and bisphenol A and phenanthrene were used as competitors. Strong competition with bisphenol A and no effect of phenanthrene on adsorption of carbamazepine was obtained. The hydrophobic neutral fraction of the DOM exhibited the strongest reductive effect on carbamazepine adsorption, most probably due to interactions in solution. In contrast, the hydrophobic acid fraction decreased carbamazepine adsorption mainly via direct competition. When DOM and bisphenol A were co-introduced, the adsorption of carbamazepine was significantly reduced. This study suggests that the chemical nature of DOM can significantly affect the sorptive behavior of polar organic pollutants with carbon nanotubes when all are introduced to the aquatic system.

Original languageAmerican English
Pages (from-to)169-176
Number of pages8
JournalEnvironmental Pollution
Volume182
DOIs
StatePublished - 2013

Bibliographical note

Funding Information:
This research was supported by a research grant from BARD ( IS4353-10 ), the United States-Israel Binational Agricultural Research and Development Fund . Appendix A

Keywords

  • Adsorption
  • Binding
  • Carbamazepine
  • Dissolved organic carbon
  • Dissolved organic matter

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