Sorption of divalent metal ions from aqueous solution by carbon nanotubes: A review

Rao, Gadupudi Purnachadra; Lu, Chungsying; Su, Fengsheng

doi:10.1016/j.seppur.2006.12.006

Cited by 968 publications

(444 citation statements)

References 69 publications

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“…It has been well-discussed in the literature that it is possible to desorb metal ions from CNTs in acidic solutions (pH<2) without a noticeable drop in their subsequent filtration efficiency [19], and we were also able to reuse our filters several times by desorbing the metal ions in an acidic solution (HNO 3 ). However, it has also been evidenced that during the acidic desorption process small amounts of CNTs are released into the solution.…”

Section: Metal Ion Removalmentioning

confidence: 54%

“…This experiment has also demonstrated that the acid functionalized CNTs provided more active groups for Zn 2+ and Mn 2+ ion binding than that of the air oxidised filter. The adsorption capacity of CNTs for metal ions strongly depends upon their surface acidity, increasing with a rise in the number of acid groups (including carboxyl, lactones and phenols) [19]. The chemical and thermal treatments used during functionalization can affect the nature and concentration of the surface functional groups displayed.…”

Section: Metal Ion Removalmentioning

confidence: 99%

“…In addition CNTs display the added benefit that the adsorbed metal ions can be desorbed and thus CNTs can be reused [19]. The immediate technological challenge now is how to convert the excellent adsorption behaviour of loose CNT powder into a cost effective and viable filter for specific applications, akin to the breakthroughs made in using CNTs to filter oil [10].…”

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: 54%

Section: Metal Ion Removalmentioning

confidence: 99%

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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“…Wastewater from many industries, such as metallurgical, mining, tannery, chemical manufacturing, and battery manufacturing industries, contains one or more toxic metal ions 1 . Therefore, the remediation of heavy metal ions from the industrial wastewaters is great interested.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Silver (I) From Aqueous Solution Using Chitosan/Montmorillonite Composite Beads

Jintakosol

Nitayaphat

2016

Mat. Res.

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Chitosan/montmorillonite (CTS-MMT) composite beads were used as adsorbents for the removal of silver ion (Ag + ) from aqueous solution. Equilibrium adsorption was achieved within 150 min at 3% MMT of chitosan solution. The optimum pH value for Ag + removal was found to be 6-7. The maximum adsorbent dosage for Ag + removal was 5 g/L. Under above maximum conditions the Ag + removal was 95.7%. The maximum adsorption capacities of CTS and CTS-MMT composite beads as obtained from Langmuir isotherm were found to be 38.46 and 43.48 mg/g, respectively. The adsorption kinetic agrees well with the pseudo second order model. The Ag + desorption of CTS-MMT composite bead was 17.39% at pH=4. SEM/EDX images confirm that after adsorption the Ag + were dispersed onto the composite bead surface. The adsorption and desorption experiment demonstrated that the CTS-MMT composite beads can be used as an effective adsorbents for removal of Ag + from aqueous solution.

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“…However, the removal efficiencies of metal ions of these adsorbents were low. Therefore, researchers carried out investigation for new promising adsorbents [15].Nanofibers shown if figure 1consist of the graphite sheet completely arranged in various orientations. One of the most outstanding features of these structures presence of a plenty of sides which in turn make sites, with readiness accessible to chemical or physical interaction, especially adsorption.…”

Section: Introductionmentioning

confidence: 99%

Effect of Functionalized Carbon Nanofibers with Carboxylic Function Group on the Removal of Zinc from water

Atieh¹

2011

IJESD

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Abstract-This study was carried out to evaluate the environmental application of modified and non-modified carbon nanofiber through the experiment removal of zinc from water. Results of the study showed that raw (non-modified) CNFs have very poor efficiency in removing zinc from water by conventional adsorption mechanism. However, when CNFs was modified with carboxylic group, a significant improvement in the zinc removal efficiency was observed. Five independent variables including pH, CNFs dosage, contact time, agitation speed and initial concentration were carried out to determine the influence of these parameters on the adsorption capacity of the zinc from water. Results of the study showed that, 97 % of zinc was removed by using COOH-CNFs at pH 7, 150 rpm, and 2 hours. These high removal efficiencies were likely attributed to the strong affinity of zinc to the physical and chemical properties of the CNFs. For results analysis, adsorption isotherms have been used in order to study the kinetics of the adsorption behavior and to determine the adsorption capacity of the absorbents. IndexTerms-Carbon nanofiber, zinc removal, functionlization and adsorption isotherms.

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Sorption of divalent metal ions from aqueous solution by carbon nanotubes: A review

Cited by 968 publications

References 69 publications

A highly efficient and versatile carbon nanotube/ceramic composite filter

A highly efficient and versatile carbon nanotube/ceramic composite filter

Adsorption of Silver (I) From Aqueous Solution Using Chitosan/Montmorillonite Composite Beads

Effect of Functionalized Carbon Nanofibers with Carboxylic Function Group on the Removal of Zinc from water

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