Succinic anhydride modified multi-walled carbon nanotubes encapsulated in polymeric gel with enhanced trapping performance for metal ions removal

2020 ◽  
Vol 207 ◽  
pp. 233-245
Author(s):  
Lingyun Jing ◽  
Ting Zhang ◽  
Xia Zhao ◽  
Xiaoning Jia ◽  
Gang Xie ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Ions ◽  
Succinic Anhydride ◽  
Polymeric Gel ◽  
Multi Walled Carbon Nanotubes ◽  
Trapping Performance ◽  
Walled Carbon Nanotubes ◽  
Metal Ions Removal

Synthesis of multi-walled carbon nanotubes and nano-fibres using the aerosol method with metal-ions as the catalyst precursors

2003 ◽  
Vol 377 (3-4) ◽  
pp. 293-298 ◽  
Author(s):  
Marianne Glerup ◽  
Henning Kanzow ◽  
Robert Almairac ◽  
Marie Castignolles ◽  
Patrick Bernier
Keyword(s):  
Carbon Nanotubes ◽  
Metal Ions ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Mechanochemical Treated Multi-Walled Carbon Nanotubes for Incorporation of Metal Ions

2008 ◽  
Vol 55-57 ◽  
pp. 537-540 ◽  
Author(s):  
U. Rinzin ◽  
Pisith Singjai ◽  
P. Wilairat ◽  
S. Meejoo
Keyword(s):  
Carbon Nanotubes ◽  
Metal Ions ◽  
Acid Treatment ◽  
Room Temperature ◽  
Ni Catalyst ◽  
Linear Least Squares ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Best Fit ◽  
Tubular Form

Ni catalyst was removed from as received multi-walled Carbon Nanotubes (MWNTs) by acid treatment. Then, the nanotubes were treated with 4M HCl during a ball milling processing yielding mechanochemical treated MWNTs (mech-MWNTs). TEM micrographs indicate that the mech-MWNTs were still of a tubular form but with much shorter length. The equilibrium adsorption of metal ions, e.g Cu2+ and Ni2+, on the mech-MWNTs was investigated at room temperature. The adsorption isotherms gave excellent consistence with the Langmuir theory and the best fit values of K-1 and Κmax can be evaluated using non-linear least-squares. As results, the maximum of Cu2+ and Ni2+ ions uptake on to the mech-MWNTs are 0.93 ± 0.004 mg/g and 2.11 ± 0.01 mg/g respectively. There is no evidence indicating that the pore structure and layer surfaces at both ends of the mech-MWNTs are appropriate sites for metal ions adsorption.

Removal of heavy metal ions from wastewaters using dendrimer-functionalized multi-walled carbon nanotubes

2017 ◽  
Vol 24 (17) ◽  
pp. 14735-14747 ◽  
Author(s):  
Daniela Iannazzo ◽  
Alessandro Pistone ◽  
Ida Ziccarelli ◽  
Claudia Espro ◽  
Signorino Galvagno ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Increased Adsorption of Heavy Metal Ions in Multi-Walled Carbon Nanotubes with Improved Dispersion Stability

Molecules ◽  
2020 ◽  
Vol 25 (14) ◽  
pp. 3106
Author(s):  
Carolina Rodríguez ◽  
Sebastián Briano ◽  
Eduardo Leiva
Keyword(s):  
Carbon Nanotubes ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Column Experiments ◽  
Acidic Solutions ◽  
Mechanical Dispersion ◽  
Removal Of Heavy Metals ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In recent years, carbon nanotubes (CNTs) have been intensively studied as an effective adsorbent for the removal of pollutants from wastewater. One of the main problems for its use corresponds to the agglomeration of the CNTs due to the interactions between them, which prevents using their entire surface area. In this study, we test the effect of dispersion of oxidized multi-walled carbon nanotubes (MWCNTs) on the removal of heavy metals from acidic solutions. For this, polyurethane filters were dyed with a well-dispersed oxidized MWCNTs solution using chemical and mechanical dispersion methods. Filters were used in column experiments, and the sorption capacity increased more than six times (600%) compared to experiments with suspended MWCNTs. Further, kinetic experiments showed a faster saturation on MWCNTs in column experiments. These results contribute to a better understanding of the effect of dispersion on the use of CNTs as heavy metal ions adsorbent.

scholarly journals Effects of Anions on Adsorption of Trace Levels of Cu(II), Pb(II) and Cr(VI) by Amino-Functionalized Multi-Walled Carbon Nanotubes

2017 ◽  
Vol 68 (2) ◽  
pp. 362-368 ◽  
Author(s):  
Aleksandra Sucurovic ◽  
Jelena Trickovic ◽  
Snezana Maletic ◽  
Marijana Kragulj Isakovski ◽  
Akos Kukovecz ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Adsorption Process ◽  
Chemical Interaction ◽  
Multiwalled Carbon ◽  
Intra Particle Diffusion ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

This work studies the adsorption of heavy metal ions (Cu(II), Pb(II) and Cr(VI)) in aqueous solutions on amino-functionalized multiwalled carbon nanotubes (MWCNTs-NH2) in the ppb concentration range (50-3000 �g/l) as a function of contact time, initial concentration of heavy metal ions and the presence of four inorganic electrolyte anions (Cl-, SO42-, NO3-, PO43-). The adsorption of heavy metals from aqueous solution was studied using different kinetic models. The results showed that the adsorption process is best fitted with the pseudo-second-order model indicating that the process is controlled by chemisorptions through electrostatic attraction and chemical interaction/complexation between the metal ions and the surface functional groups of MWCNTs-NH2. The intra-particle diffusion model showed that diffusion is slow, but did not govern the rate of the overall adsorption process. The effects of Cl-, SO42-, NO3- and PO43- anions on the adsorption of Cu(II), Pb(II) and Cr(VI) are variable (improvement, reduction, no impact).

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