Adsorptive fractionation of dissolved organic matter (DOM) by carbon nanotubes

Maya Engel, Benny Chefetz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Dissolved organic matter (DOM) and carbon nanotubes are introduced into aquatic environments. Thus, it is important to elucidate whether their interaction affects DOM amount and composition. In this study, the composition of DOM, before and after interactions with single-walled carbon nanotubes (SWCNTs), was measured and the adsorption affinity of the individual structural fractions of DOM to SWCNTs was investigated. Adsorption of DOM to SWCNTs was dominated by the hydrophobic acid fraction, resulting in relative enhancement of the hydrophilic character of non-adsorbed DOM. The preferential adsorption of the HoA fraction was concentration-dependent, increasing with increasing concentration. Adsorption affinities of bulk DOM calculated as the normalized sum of affinities of the individual structural fractions were similar to the measured affinities, suggesting that the structural fractions of DOM act as independent adsorbates. The altered DOM composition may affect the nature and reactivity of DOM in aquatic environments polluted with carbon nanotubes.

Original languageAmerican English
Pages (from-to)287-294
Number of pages8
JournalEnvironmental Pollution
StatePublished - Feb 2015

Bibliographical note

Funding Information:
This research was supported in part by BARD, the United States-Israel Binational Agricultural Research and Development Fund ( US-4656-13 ).

Publisher Copyright:
©2014 Elsevier Ltd. All rights reserved.


  • Carbon nanomaterial
  • Characterization
  • Composition
  • Fraction
  • Sorption


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