Oxidized and Ethylenediamine-Functionalized Multi-Walled Carbon Nanotubes for the Separation of Low Concentration Arsenate from Water
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2013
Authors
Veličković, Zlate
Marinković, Aleksandar

Bajić, Zoran J.

Marković, Jelena M.
Perić-Grujić, Aleksandra

Uskoković, Petar

Ristić, Mirjana

Article (Published version)

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In this work multiwalled carbon nanotubes (MWCNTs) modified by oxidation (o-MWCNTs) and by aminofunctionalization (e-MWCNTs) were examined as potential adsorbents for arsenate removal from water. Adsorption characteristics of raw and modified MWCNTs were investigated in batch adsorption experiments. The influence of solution pH (pH range 3-10), contact time, and temperature (25, 35, and 45 degrees C) were studied. Ethylenediamine-functionalized MWCNTs have the greatest affinity for arsenate ions, followed by o-MWCNTs and raw-MWCNTs. The obtained experimental data for raw- and o-MWCNTs fitted Sips isotherm model, while for the e-MWCNTs, the Freundlich model provided the best fit to the experimental points. The maximum adsorption capacity for arsenate ions was achieved using e-MWCNTs, 12.18mgg(-1). The presence of the arsenate on the adsorbent is confirmed by FTIR spectroscopy. Thermodynamic studies indicated the spontaneity and endothermic nature of the adsorption. Sodium hydroxide solu...tion (0.1M) was found to desorb about 70% of arsenate from e-MWCNTs. The results with spiked drinking water samples demonstrated that e-MWCNTs, due to the present basic and acidic groups, were very efficient for the removal of arsenate ions, as well as of some cations, at pH 4.
Keywords:
adsorption / arsenate / equilibrium / kineticsSource:
Separation Science and Technology, 2013, 48, 13, 2047-2058Publisher:
- Taylor & Francis Inc, Philadelphia
Funding / projects:
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-45019)
- Development and Application of Methods and Materials for Monitoring New Organic Contaminants, Toxic Compounds and Heavy Metals (RS-172007)
DOI: 10.1080/01496395.2013.790446
ISSN: 0149-6395
WoS: 000322867500016
Scopus: 2-s2.0-84881649784
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Veličković, Zlate AU - Marinković, Aleksandar AU - Bajić, Zoran J. AU - Marković, Jelena M. AU - Perić-Grujić, Aleksandra AU - Uskoković, Petar AU - Ristić, Mirjana PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2386 AB - In this work multiwalled carbon nanotubes (MWCNTs) modified by oxidation (o-MWCNTs) and by aminofunctionalization (e-MWCNTs) were examined as potential adsorbents for arsenate removal from water. Adsorption characteristics of raw and modified MWCNTs were investigated in batch adsorption experiments. The influence of solution pH (pH range 3-10), contact time, and temperature (25, 35, and 45 degrees C) were studied. Ethylenediamine-functionalized MWCNTs have the greatest affinity for arsenate ions, followed by o-MWCNTs and raw-MWCNTs. The obtained experimental data for raw- and o-MWCNTs fitted Sips isotherm model, while for the e-MWCNTs, the Freundlich model provided the best fit to the experimental points. The maximum adsorption capacity for arsenate ions was achieved using e-MWCNTs, 12.18mgg(-1). The presence of the arsenate on the adsorbent is confirmed by FTIR spectroscopy. Thermodynamic studies indicated the spontaneity and endothermic nature of the adsorption. Sodium hydroxide solution (0.1M) was found to desorb about 70% of arsenate from e-MWCNTs. The results with spiked drinking water samples demonstrated that e-MWCNTs, due to the present basic and acidic groups, were very efficient for the removal of arsenate ions, as well as of some cations, at pH 4. PB - Taylor & Francis Inc, Philadelphia T2 - Separation Science and Technology T1 - Oxidized and Ethylenediamine-Functionalized Multi-Walled Carbon Nanotubes for the Separation of Low Concentration Arsenate from Water EP - 2058 IS - 13 SP - 2047 VL - 48 DO - 10.1080/01496395.2013.790446 ER -
@article{ author = "Veličković, Zlate and Marinković, Aleksandar and Bajić, Zoran J. and Marković, Jelena M. and Perić-Grujić, Aleksandra and Uskoković, Petar and Ristić, Mirjana", year = "2013", abstract = "In this work multiwalled carbon nanotubes (MWCNTs) modified by oxidation (o-MWCNTs) and by aminofunctionalization (e-MWCNTs) were examined as potential adsorbents for arsenate removal from water. Adsorption characteristics of raw and modified MWCNTs were investigated in batch adsorption experiments. The influence of solution pH (pH range 3-10), contact time, and temperature (25, 35, and 45 degrees C) were studied. Ethylenediamine-functionalized MWCNTs have the greatest affinity for arsenate ions, followed by o-MWCNTs and raw-MWCNTs. The obtained experimental data for raw- and o-MWCNTs fitted Sips isotherm model, while for the e-MWCNTs, the Freundlich model provided the best fit to the experimental points. The maximum adsorption capacity for arsenate ions was achieved using e-MWCNTs, 12.18mgg(-1). The presence of the arsenate on the adsorbent is confirmed by FTIR spectroscopy. Thermodynamic studies indicated the spontaneity and endothermic nature of the adsorption. Sodium hydroxide solution (0.1M) was found to desorb about 70% of arsenate from e-MWCNTs. The results with spiked drinking water samples demonstrated that e-MWCNTs, due to the present basic and acidic groups, were very efficient for the removal of arsenate ions, as well as of some cations, at pH 4.", publisher = "Taylor & Francis Inc, Philadelphia", journal = "Separation Science and Technology", title = "Oxidized and Ethylenediamine-Functionalized Multi-Walled Carbon Nanotubes for the Separation of Low Concentration Arsenate from Water", pages = "2058-2047", number = "13", volume = "48", doi = "10.1080/01496395.2013.790446" }
Veličković, Z., Marinković, A., Bajić, Z. J., Marković, J. M., Perić-Grujić, A., Uskoković, P.,& Ristić, M.. (2013). Oxidized and Ethylenediamine-Functionalized Multi-Walled Carbon Nanotubes for the Separation of Low Concentration Arsenate from Water. in Separation Science and Technology Taylor & Francis Inc, Philadelphia., 48(13), 2047-2058. https://doi.org/10.1080/01496395.2013.790446
Veličković Z, Marinković A, Bajić ZJ, Marković JM, Perić-Grujić A, Uskoković P, Ristić M. Oxidized and Ethylenediamine-Functionalized Multi-Walled Carbon Nanotubes for the Separation of Low Concentration Arsenate from Water. in Separation Science and Technology. 2013;48(13):2047-2058. doi:10.1080/01496395.2013.790446 .
Veličković, Zlate, Marinković, Aleksandar, Bajić, Zoran J., Marković, Jelena M., Perić-Grujić, Aleksandra, Uskoković, Petar, Ristić, Mirjana, "Oxidized and Ethylenediamine-Functionalized Multi-Walled Carbon Nanotubes for the Separation of Low Concentration Arsenate from Water" in Separation Science and Technology, 48, no. 13 (2013):2047-2058, https://doi.org/10.1080/01496395.2013.790446 . .