Adsorption of arsenic on multiwall carbon nanotube-zirconia nanohybrid for potential drinking water purification

Susana Addo Ntim; Somenath Mitra

doi:10.1016/j.jcis.2012.01.063

Adsorption of arsenic on multiwall carbon nanotube-zirconia nanohybrid for potential drinking water purification

Susana Addo Ntim, Somenath Mitra

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Abstract

The adsorptive removal of arsenic from water using a multiwall carbon nanotube-zirconia nanohybrid (MWCNT-ZrO ₂) is presented. The MWCNT-ZrO ₂ with 4.85% zirconia was effective in meeting the drinking water standard levels of 10μgL ^-1. The absorption capacity of the composite were 2000μgg ^-1 and 5000μgg ^-1 for As(III) and As(V) respectively, which were significantly higher than those reported previously for iron oxide coated MWCNTs. The adsorption of As(V) on MWCNT-ZrO ₂ was faster than that of As(III), and a pseudo-second order rate equation effectively described the uptake kinetics. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. A major advantage of the MWCNT-ZrO ₂ was that the adsorption capacity was not a function of pH.

Original language	English (US)
Pages (from-to)	154-159
Number of pages	6
Journal	Journal of Colloid And Interface Science
Volume	375
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2012.01.063
State	Published - Jun 1 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

Keywords

Adsorption
Arsenic
Carbon nanotubes
Kinetics
Water
Zirconia

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10.1016/j.jcis.2012.01.063

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title = "Adsorption of arsenic on multiwall carbon nanotube-zirconia nanohybrid for potential drinking water purification",

abstract = "The adsorptive removal of arsenic from water using a multiwall carbon nanotube-zirconia nanohybrid (MWCNT-ZrO 2) is presented. The MWCNT-ZrO 2 with 4.85% zirconia was effective in meeting the drinking water standard levels of 10μgL -1. The absorption capacity of the composite were 2000μgg -1 and 5000μgg -1 for As(III) and As(V) respectively, which were significantly higher than those reported previously for iron oxide coated MWCNTs. The adsorption of As(V) on MWCNT-ZrO 2 was faster than that of As(III), and a pseudo-second order rate equation effectively described the uptake kinetics. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. A major advantage of the MWCNT-ZrO 2 was that the adsorption capacity was not a function of pH.",

keywords = "Adsorption, Arsenic, Carbon nanotubes, Kinetics, Water, Zirconia",

author = "{Addo Ntim}, Susana and Somenath Mitra",

note = "Funding Information: The authors would like to thank Dr. Larisa Krishtopa for helping with the ICP-MS analysis. This work was funded by the National Institute of Environmental Health Sciences (NIESH) under grant Number RC2 ES018810 . Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NIESH. Partial support for this work was also provided by the Schlumberger Foundation Faculty for the Future Fellowship.",

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doi = "10.1016/j.jcis.2012.01.063",

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AU - Addo Ntim, Susana

AU - Mitra, Somenath

N1 - Funding Information: The authors would like to thank Dr. Larisa Krishtopa for helping with the ICP-MS analysis. This work was funded by the National Institute of Environmental Health Sciences (NIESH) under grant Number RC2 ES018810 . Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NIESH. Partial support for this work was also provided by the Schlumberger Foundation Faculty for the Future Fellowship.

PY - 2012/6/1

Y1 - 2012/6/1

N2 - The adsorptive removal of arsenic from water using a multiwall carbon nanotube-zirconia nanohybrid (MWCNT-ZrO 2) is presented. The MWCNT-ZrO 2 with 4.85% zirconia was effective in meeting the drinking water standard levels of 10μgL -1. The absorption capacity of the composite were 2000μgg -1 and 5000μgg -1 for As(III) and As(V) respectively, which were significantly higher than those reported previously for iron oxide coated MWCNTs. The adsorption of As(V) on MWCNT-ZrO 2 was faster than that of As(III), and a pseudo-second order rate equation effectively described the uptake kinetics. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. A major advantage of the MWCNT-ZrO 2 was that the adsorption capacity was not a function of pH.

AB - The adsorptive removal of arsenic from water using a multiwall carbon nanotube-zirconia nanohybrid (MWCNT-ZrO 2) is presented. The MWCNT-ZrO 2 with 4.85% zirconia was effective in meeting the drinking water standard levels of 10μgL -1. The absorption capacity of the composite were 2000μgg -1 and 5000μgg -1 for As(III) and As(V) respectively, which were significantly higher than those reported previously for iron oxide coated MWCNTs. The adsorption of As(V) on MWCNT-ZrO 2 was faster than that of As(III), and a pseudo-second order rate equation effectively described the uptake kinetics. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. A major advantage of the MWCNT-ZrO 2 was that the adsorption capacity was not a function of pH.

KW - Adsorption

KW - Arsenic

KW - Carbon nanotubes

KW - Kinetics

KW - Water

KW - Zirconia

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Adsorption of arsenic on multiwall carbon nanotube-zirconia nanohybrid for potential drinking water purification

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