Adsorption of chlorinated phenols on multiwalled carbon nanotubes

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

This work studies the adsorption of four chlorinated phenols (2,4-dichlorophenol, 2,4,6-trichlorophenol, 2,3,4,5-tetrachlorophenol and pentachlorophenol) in aqueous solutions on multiwalled carbon nanotubes (MWCNT). To investigate the influence of oxygen containing functional groups, adsorption parameters for the phenols were determined for original MWCNT (OMWCNT) and functionally modified MWCNT (FMWCNT) by acid treatment for 3 h and 6 h. The correlation between phenol adsorption affinity and specific surface area (SSA) indicates that OMWCNT have higher adsorption affinities for larger molecules such as tetrachlorophenol and pentachlorophenol, which suggests that mesopore filling is not the dominant mechanism controlling their adsorption. Electrostatic repulsion between disassociated chlorinated phenols and disassociated functional groups on the surface of both FMWCNT lead to adsorption decreasing with increasing functionalisation under neutral pH conditions. On OMWCNT, a positive correlation between molecular hydrophobicity and adsorption affinity was obtained, indicating hydrophobic interactions control the adsorption of chlorinated phenols. To investigate the role of π-π interactions, Kd values (at 0.01 and 0.5 SW) were normalized by hydrophobicity. The Kd/KOW values for all MWCNT decreased from 2,4-dichlorophenol to pentachlorophenol and were negatively correlated with the electron-acceptor property of the molecules. The most pronounced π-π interactions were observed for 2,6-dichlorophenol on all MWCNT.

Original languageEnglish
Pages (from-to)24920-24929
Number of pages10
JournalRSC Advances
Volume5
Issue number32
DOIs
Publication statusPublished - 2015

Fingerprint

Multiwalled carbon nanotubes (MWCN)
Phenols
Adsorption
Pentachlorophenol
Hydrophobicity
Functional groups
Molecules
Phenol
Specific surface area
Electrostatics
Oxygen
Acids
Electrons

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Kragulj, M., Tričković, J., Kukovecz, Á., Jović, B., Molnar, J., Rončević, S., ... Dalmacija, B. (2015). Adsorption of chlorinated phenols on multiwalled carbon nanotubes. RSC Advances, 5(32), 24920-24929. https://doi.org/10.1039/c5ra03395k

Adsorption of chlorinated phenols on multiwalled carbon nanotubes. / Kragulj, Marijana; Tričković, Jelena; Kukovecz, Á.; Jović, Branislav; Molnar, Jelena; Rončević, Srdan; Kónya, Z.; Dalmacija, Božo.

In: RSC Advances, Vol. 5, No. 32, 2015, p. 24920-24929.

Research output: Contribution to journalArticle

Kragulj, M, Tričković, J, Kukovecz, Á, Jović, B, Molnar, J, Rončević, S, Kónya, Z & Dalmacija, B 2015, 'Adsorption of chlorinated phenols on multiwalled carbon nanotubes', RSC Advances, vol. 5, no. 32, pp. 24920-24929. https://doi.org/10.1039/c5ra03395k
Kragulj M, Tričković J, Kukovecz Á, Jović B, Molnar J, Rončević S et al. Adsorption of chlorinated phenols on multiwalled carbon nanotubes. RSC Advances. 2015;5(32):24920-24929. https://doi.org/10.1039/c5ra03395k
Kragulj, Marijana ; Tričković, Jelena ; Kukovecz, Á. ; Jović, Branislav ; Molnar, Jelena ; Rončević, Srdan ; Kónya, Z. ; Dalmacija, Božo. / Adsorption of chlorinated phenols on multiwalled carbon nanotubes. In: RSC Advances. 2015 ; Vol. 5, No. 32. pp. 24920-24929.
@article{83c2fbf7a77141da8dc4b2ed4000c970,
title = "Adsorption of chlorinated phenols on multiwalled carbon nanotubes",
abstract = "This work studies the adsorption of four chlorinated phenols (2,4-dichlorophenol, 2,4,6-trichlorophenol, 2,3,4,5-tetrachlorophenol and pentachlorophenol) in aqueous solutions on multiwalled carbon nanotubes (MWCNT). To investigate the influence of oxygen containing functional groups, adsorption parameters for the phenols were determined for original MWCNT (OMWCNT) and functionally modified MWCNT (FMWCNT) by acid treatment for 3 h and 6 h. The correlation between phenol adsorption affinity and specific surface area (SSA) indicates that OMWCNT have higher adsorption affinities for larger molecules such as tetrachlorophenol and pentachlorophenol, which suggests that mesopore filling is not the dominant mechanism controlling their adsorption. Electrostatic repulsion between disassociated chlorinated phenols and disassociated functional groups on the surface of both FMWCNT lead to adsorption decreasing with increasing functionalisation under neutral pH conditions. On OMWCNT, a positive correlation between molecular hydrophobicity and adsorption affinity was obtained, indicating hydrophobic interactions control the adsorption of chlorinated phenols. To investigate the role of π-π interactions, Kd values (at 0.01 and 0.5 SW) were normalized by hydrophobicity. The Kd/KOW values for all MWCNT decreased from 2,4-dichlorophenol to pentachlorophenol and were negatively correlated with the electron-acceptor property of the molecules. The most pronounced π-π interactions were observed for 2,6-dichlorophenol on all MWCNT.",
author = "Marijana Kragulj and Jelena Tričković and {\'A}. Kukovecz and Branislav Jović and Jelena Molnar and Srdan Rončević and Z. K{\'o}nya and Božo Dalmacija",
year = "2015",
doi = "10.1039/c5ra03395k",
language = "English",
volume = "5",
pages = "24920--24929",
journal = "RSC Advances",
issn = "2046-2069",
publisher = "Royal Society of Chemistry",
number = "32",

}

TY - JOUR

T1 - Adsorption of chlorinated phenols on multiwalled carbon nanotubes

AU - Kragulj, Marijana

AU - Tričković, Jelena

AU - Kukovecz, Á.

AU - Jović, Branislav

AU - Molnar, Jelena

AU - Rončević, Srdan

AU - Kónya, Z.

AU - Dalmacija, Božo

PY - 2015

Y1 - 2015

N2 - This work studies the adsorption of four chlorinated phenols (2,4-dichlorophenol, 2,4,6-trichlorophenol, 2,3,4,5-tetrachlorophenol and pentachlorophenol) in aqueous solutions on multiwalled carbon nanotubes (MWCNT). To investigate the influence of oxygen containing functional groups, adsorption parameters for the phenols were determined for original MWCNT (OMWCNT) and functionally modified MWCNT (FMWCNT) by acid treatment for 3 h and 6 h. The correlation between phenol adsorption affinity and specific surface area (SSA) indicates that OMWCNT have higher adsorption affinities for larger molecules such as tetrachlorophenol and pentachlorophenol, which suggests that mesopore filling is not the dominant mechanism controlling their adsorption. Electrostatic repulsion between disassociated chlorinated phenols and disassociated functional groups on the surface of both FMWCNT lead to adsorption decreasing with increasing functionalisation under neutral pH conditions. On OMWCNT, a positive correlation between molecular hydrophobicity and adsorption affinity was obtained, indicating hydrophobic interactions control the adsorption of chlorinated phenols. To investigate the role of π-π interactions, Kd values (at 0.01 and 0.5 SW) were normalized by hydrophobicity. The Kd/KOW values for all MWCNT decreased from 2,4-dichlorophenol to pentachlorophenol and were negatively correlated with the electron-acceptor property of the molecules. The most pronounced π-π interactions were observed for 2,6-dichlorophenol on all MWCNT.

AB - This work studies the adsorption of four chlorinated phenols (2,4-dichlorophenol, 2,4,6-trichlorophenol, 2,3,4,5-tetrachlorophenol and pentachlorophenol) in aqueous solutions on multiwalled carbon nanotubes (MWCNT). To investigate the influence of oxygen containing functional groups, adsorption parameters for the phenols were determined for original MWCNT (OMWCNT) and functionally modified MWCNT (FMWCNT) by acid treatment for 3 h and 6 h. The correlation between phenol adsorption affinity and specific surface area (SSA) indicates that OMWCNT have higher adsorption affinities for larger molecules such as tetrachlorophenol and pentachlorophenol, which suggests that mesopore filling is not the dominant mechanism controlling their adsorption. Electrostatic repulsion between disassociated chlorinated phenols and disassociated functional groups on the surface of both FMWCNT lead to adsorption decreasing with increasing functionalisation under neutral pH conditions. On OMWCNT, a positive correlation between molecular hydrophobicity and adsorption affinity was obtained, indicating hydrophobic interactions control the adsorption of chlorinated phenols. To investigate the role of π-π interactions, Kd values (at 0.01 and 0.5 SW) were normalized by hydrophobicity. The Kd/KOW values for all MWCNT decreased from 2,4-dichlorophenol to pentachlorophenol and were negatively correlated with the electron-acceptor property of the molecules. The most pronounced π-π interactions were observed for 2,6-dichlorophenol on all MWCNT.

UR - http://www.scopus.com/inward/record.url?scp=84924862491&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84924862491&partnerID=8YFLogxK

U2 - 10.1039/c5ra03395k

DO - 10.1039/c5ra03395k

M3 - Article

AN - SCOPUS:84924862491

VL - 5

SP - 24920

EP - 24929

JO - RSC Advances

JF - RSC Advances

SN - 2046-2069

IS - 32

ER -