Removal of noxious Cr (VI) ions using single-walled carbon nanotubes and multi-walled carbon nanotubes

Mohammad Hadi Dehghani; Mahdieh Mohammad Taher; Anil Kumar Bajpai; Behzad Heibati; Inderjeet Tyagi; Mohammad Asif; Shilpi Agarwal; Vinod Kumar Gupta

doi:10.1016/j.cej.2015.04.151

Removal of noxious Cr (VI) ions using single-walled carbon nanotubes and multi-walled carbon nanotubes

Mohammad Hadi Dehghani, Mahdieh Mohammad Taher, Anil Kumar Bajpai, Behzad Heibati, Inderjeet Tyagi, Mohammad Asif, Shilpi Agarwal, Vinod Kumar Gupta^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

230 Scopus citations

Abstract

The adsorption capacity of two efficient adsorbents namely MWCNTs and SWCNTs for the rapid removal of noxious Cr (VI) ion from the polluted aqueous source was well studied and investigated. The impact of several influential parameters such as contact time, initial pH, initial Cr (VI) ion concentrations and the adsorption capacity of the adsorbent in the presence of competing anion was well elucidated and optimized. It was observed that the removal of efficiency of Cr (VI) ion depends on the pH of solution and the maximum efficiency was noticed at pH 2.5. Furthermore, the uptake of Cr (VI) ion was hindered in the presence of the competing anion, SO₄^2-. Experimental equilibrium data were fitted to four different isotherm models by linear regression method, however, the adsorption equilibrium data were well interpreted by the Langmuir model. The maximum adsorption capacity of Cr (VI) ion by MWCNTs and SWCNTs was 1.26 and 2.35mg/g respectively, which is calculated by the Langmuir isotherm model. Kinetic studies are well suited and found in good agreement with pseudo-second order. The results evidently indicated that MWCNTs and SWCNTs would be suitable adsorbents for Cr (VI) ion in wastewater under specific conditions.

Original language	English
Pages (from-to)	344-352
Number of pages	9
Journal	Chemical Engineering Journal
Volume	279
DOIs	https://doi.org/10.1016/j.cej.2015.04.151
State	Published - 1 Nov 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V.

Keywords

Adsorption isotherm
Chromium
MWCNTs
SWCNTs

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.cej.2015.04.151

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title = "Removal of noxious Cr (VI) ions using single-walled carbon nanotubes and multi-walled carbon nanotubes",

abstract = "The adsorption capacity of two efficient adsorbents namely MWCNTs and SWCNTs for the rapid removal of noxious Cr (VI) ion from the polluted aqueous source was well studied and investigated. The impact of several influential parameters such as contact time, initial pH, initial Cr (VI) ion concentrations and the adsorption capacity of the adsorbent in the presence of competing anion was well elucidated and optimized. It was observed that the removal of efficiency of Cr (VI) ion depends on the pH of solution and the maximum efficiency was noticed at pH 2.5. Furthermore, the uptake of Cr (VI) ion was hindered in the presence of the competing anion, SO42-. Experimental equilibrium data were fitted to four different isotherm models by linear regression method, however, the adsorption equilibrium data were well interpreted by the Langmuir model. The maximum adsorption capacity of Cr (VI) ion by MWCNTs and SWCNTs was 1.26 and 2.35mg/g respectively, which is calculated by the Langmuir isotherm model. Kinetic studies are well suited and found in good agreement with pseudo-second order. The results evidently indicated that MWCNTs and SWCNTs would be suitable adsorbents for Cr (VI) ion in wastewater under specific conditions.",

keywords = "Adsorption isotherm, Chromium, MWCNTs, SWCNTs",

author = "Dehghani, \{Mohammad Hadi\} and Taher, \{Mahdieh Mohammad\} and Bajpai, \{Anil Kumar\} and Behzad Heibati and Inderjeet Tyagi and Mohammad Asif and Shilpi Agarwal and Gupta, \{Vinod Kumar\}",

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year = "2015",

month = nov,

day = "1",

doi = "10.1016/j.cej.2015.04.151",

language = "English",

volume = "279",

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T1 - Removal of noxious Cr (VI) ions using single-walled carbon nanotubes and multi-walled carbon nanotubes

AU - Dehghani, Mohammad Hadi

AU - Taher, Mahdieh Mohammad

AU - Bajpai, Anil Kumar

AU - Heibati, Behzad

AU - Tyagi, Inderjeet

AU - Asif, Mohammad

AU - Agarwal, Shilpi

AU - Gupta, Vinod Kumar

PY - 2015/11/1

Y1 - 2015/11/1

N2 - The adsorption capacity of two efficient adsorbents namely MWCNTs and SWCNTs for the rapid removal of noxious Cr (VI) ion from the polluted aqueous source was well studied and investigated. The impact of several influential parameters such as contact time, initial pH, initial Cr (VI) ion concentrations and the adsorption capacity of the adsorbent in the presence of competing anion was well elucidated and optimized. It was observed that the removal of efficiency of Cr (VI) ion depends on the pH of solution and the maximum efficiency was noticed at pH 2.5. Furthermore, the uptake of Cr (VI) ion was hindered in the presence of the competing anion, SO42-. Experimental equilibrium data were fitted to four different isotherm models by linear regression method, however, the adsorption equilibrium data were well interpreted by the Langmuir model. The maximum adsorption capacity of Cr (VI) ion by MWCNTs and SWCNTs was 1.26 and 2.35mg/g respectively, which is calculated by the Langmuir isotherm model. Kinetic studies are well suited and found in good agreement with pseudo-second order. The results evidently indicated that MWCNTs and SWCNTs would be suitable adsorbents for Cr (VI) ion in wastewater under specific conditions.

AB - The adsorption capacity of two efficient adsorbents namely MWCNTs and SWCNTs for the rapid removal of noxious Cr (VI) ion from the polluted aqueous source was well studied and investigated. The impact of several influential parameters such as contact time, initial pH, initial Cr (VI) ion concentrations and the adsorption capacity of the adsorbent in the presence of competing anion was well elucidated and optimized. It was observed that the removal of efficiency of Cr (VI) ion depends on the pH of solution and the maximum efficiency was noticed at pH 2.5. Furthermore, the uptake of Cr (VI) ion was hindered in the presence of the competing anion, SO42-. Experimental equilibrium data were fitted to four different isotherm models by linear regression method, however, the adsorption equilibrium data were well interpreted by the Langmuir model. The maximum adsorption capacity of Cr (VI) ion by MWCNTs and SWCNTs was 1.26 and 2.35mg/g respectively, which is calculated by the Langmuir isotherm model. Kinetic studies are well suited and found in good agreement with pseudo-second order. The results evidently indicated that MWCNTs and SWCNTs would be suitable adsorbents for Cr (VI) ion in wastewater under specific conditions.

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KW - Chromium

KW - MWCNTs

KW - SWCNTs

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ER -

Removal of noxious Cr (VI) ions using single-walled carbon nanotubes and multi-walled carbon nanotubes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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