Molecular interactions between organic compounds and functionally modified multiwalled carbon nanotubes

Marijana Kragulj, Jelena Tričković, Božo Dalmacija, Á. Kukovecz, Z. Kónya, Jelena Molnar, Srdan Rončević

Research output: Article

21 Citations (Scopus)

Abstract

This work investigates the adsorption of four groups of organic compounds (OCs): (1) nitroaromatics, (2) nonpolar aliphatics, (3) monoaromatics and (4) polycyclic aromatic hydrocarbons (PAHs) on multiwalled carbon nanotubes (MWCNTs). In order to investigate the influence which oxygen containing functional groups exert on the adsorption process, three MWCNTs were used: the pristine (original, as-received) MWCNTs (OMWCNT) and two MWCNTs functionally modified by acid treatment of OMWCNT during 3. h and 6. h (FMWCNT3h, FMWCNT6h). All adsorption isotherms well fitted with the Freundlich model. The nonlinearity of the isotherms ranged from 0.418 to 0.897. The results show that Kd values for PAHs increased with increasing specific surface areas (SSAs). The adsorption affinities of the larger molecular size OCs (PAHs) were higher than those of the smaller size OCs (benzene, toluene and hexane) which is probably due to their large contact area with the surface of the adsorbent. Adsorption of OCs on MWCNTs was mainly controlled by hydrophobic interactions, except for the nitroaromatic compound, as shown by the increasing adsorption affinities with the compound's hydrophobicity. KOW-normalized adsorption coefficients (Kd/. KOW) for all the investigated compounds on all the MWCNTs followed the order: nonpolar aliphatic.

Original languageEnglish
Pages (from-to)144-152
Number of pages9
JournalChemical Engineering Journal
Volume225
DOIs
Publication statusPublished - jún. 1 2013

Fingerprint

Molecular interactions
Multiwalled carbon nanotubes (MWCN)
Organic compounds
organic compound
adsorption
Adsorption
Polycyclic Aromatic Hydrocarbons
Polycyclic aromatic hydrocarbons
PAH
isotherm
Toluene
Hexanes
Hydrophobicity
Benzene
Hexane
Adsorption isotherms
Specific surface area
Adsorbents
Functional groups
hydrophobicity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering
  • Environmental Chemistry

Cite this

Molecular interactions between organic compounds and functionally modified multiwalled carbon nanotubes. / Kragulj, Marijana; Tričković, Jelena; Dalmacija, Božo; Kukovecz, Á.; Kónya, Z.; Molnar, Jelena; Rončević, Srdan.

In: Chemical Engineering Journal, Vol. 225, 01.06.2013, p. 144-152.

Research output: Article

Kragulj, Marijana ; Tričković, Jelena ; Dalmacija, Božo ; Kukovecz, Á. ; Kónya, Z. ; Molnar, Jelena ; Rončević, Srdan. / Molecular interactions between organic compounds and functionally modified multiwalled carbon nanotubes. In: Chemical Engineering Journal. 2013 ; Vol. 225. pp. 144-152.
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