Adsorption of heavy metal ions with carbon nanotubes

Stafiej, J.; Pyrzyńska, Krystyna

doi:10.1016/j.seppur.2007.07.008

Cited by 621 publications

(261 citation statements)

References 16 publications

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“…Liquid acid oxidation can also generate carboxylic acid functional groups on the surface of CNTs, and in addition remove amorphous carbon from the CNT surfaces. These changes can facilitate the ion-exchange capability of CNTs, as the introduced functional groups cause a rise in negative charge on the carbon surface and the oxygen atoms in functional groups can donate electrons resulting in a higher cation exchange capacity [3,13]. Fig.…”

Section: Metal Ion Removalmentioning

confidence: 99%

“…In addition CNT filters developed on glass fibres [9], through macro architecture [10] or on microporous membranes [11,12] has been shown to be efficient in the removal of bacterial and viral pathogens from water, and even result in the inactivation of the pathogen. Finally the adsorption capability of CNTs for a wide range of metal ions, including Cu 2+ , Pb 2+ , Cd 2+ [3], Zn 2+ , Mn 2+ , Co 2+ [13], Ni 2+ [14], Cr 2+ [15], Hg 2+ [16] and U 6+ [17] has been investigated and these typically show different orders of affinity depending on the functionalization and synthesis procedures employed.…”

Section: Introductionmentioning

confidence: 99%

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A highly efficient and versatile carbon nanotube/ceramic composite filter

Parham

Bates

Xia

et al. 2013

Carbon

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Please cite this article as: Parham, H., Bates, S., Xia, Y., Zhu, Y., A highly efficient and versatile carbon nanotube/ ceramic composite filter, Carbon (2012), doi: http://dx.doi.org/10.1016/j.carbon. 2012.11.032 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. The composite filter also exhibited good reusability for these applications, owing to the excellent thermal and chemical stability of the carbon nanotubes.

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Section: Metal Ion Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A highly efficient and versatile carbon nanotube/ceramic composite filter

Parham

Bates

Xia

et al. 2013

Carbon

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“…Among above treatment techniques, adsorption has been one of the most widely used methods to remove chromium species from aqueous solutions (Deng and Bai 2004;Stafiej and Pyrzynska 2007). Adsorption is a surface phenomenon and defined as the increase in the concentration of a particular component at the surface or interface between two phases (Gupta et al 2012a).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of hexavalent chromium ions from aqueous solution by graphene nanosheets: kinetic and thermodynamic studies

Goharshadi

Moghaddam

2015

Int. J. Environ. Sci. Technol.

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In the present study, a batch system was used to investigate the adsorption of chromium (VI) ions from an aqueous solution by graphene nanosheets. Graphene is decorated with functional groups containing oxygen such as epoxy and hydroxyl on the basal plane. The large negative charge density available on graphene causes effective adsorption of chromium (VI) ions from aqueous solutions. The adsorption capacity and rate of chromium (VI) ions at different temperatures, adsorbent dosages, initial concentrations, and contact times were evaluated. The kinetic study illustrated that the adsorption of chromium (VI) ions onto graphene obeys the pseudo-second-order model with activation energy of 21.91 kJ mol -1 . The chromium (VI) ions adsorption was well explained using Dubinin-Radushkevich isotherm model. The values of standard enthalpy, entropy, and Gibbs free energy changes at 25°C were calculated as 686.07 kJ mol -1 , 2.38 kJ mol -1 K -1 , and -22.43 kJ mol -1 , respectively. In this work, graphene was prepared via a green method. Transmission electron microscopy, Fourier transform-infrared spectroscopy, energy-dispersive X-ray analysis, powder X-ray diffraction, Boehm's titration, and N 2 adsorption-desorption techniques revealed a high-quality few-layer nanosheets of graphene with surface area and inter-planar spacing of 594.7 m 2 g -1 and 3.6 Å , respectively.

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“…Generated wastewater is mainly composed of electrophoretic wastewater, cleaning wastewater, phosphating wastewater and degreasing wastewater. The average volumes of wastewater generated daily from the factory were 270 m 3 . The composition of the wastewater is given in Table 1.…”

Section: A Materialsmentioning

confidence: 99%

“…PAC is a partially hydrolyzed aluminum chloride solution that has recently been found to provide stronger and faster settling flocs [2] . The methods used for the removal of heavy metals include chemical precipitation, membrane separation, ion exchange and adsorption [3] . Chemical precipitation has been widely used for removing heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Removal of phosphorus and nickel from an automobile wastewater by coagulation/flocculation combined with magnetite

Liu¹,

Liu²,

Wu³

et al. 2013

Proceedings of the 2013 International Conference on Remote Sensing,Environment and Transportation Engineering

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Abstract-The method of coagulation/flocculation combined with magnetite powder was used to remove total phosphorus (TP) and nickel from an automobile wastewater. In the method, magnetite powder, poly-aluminum chloride (PAC) and cationic polyacrylamide (PAM) were added into the wastewater. Through a factorial design evaluation, the dosage of PAC was considered as the main factor influencing the TP removal.

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Adsorption of heavy metal ions with carbon nanotubes

Cited by 621 publications

References 16 publications

A highly efficient and versatile carbon nanotube/ceramic composite filter

A highly efficient and versatile carbon nanotube/ceramic composite filter

Adsorption of hexavalent chromium ions from aqueous solution by graphene nanosheets: kinetic and thermodynamic studies

Removal of phosphorus and nickel from an automobile wastewater by coagulation/flocculation combined with magnetite

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