Phenol adsorption from aqueous solutions by functionalized multiwalled carbon nanotubes with a pyrazoline derivative in the presence of ultrasound

RSC Advances ◽  
2015 ◽  
Vol 5 (55) ◽  
pp. 44263-44273 ◽  
Author(s):  
H. Tahermansouri ◽  
Z. Dehghan ◽  
F. Kiani
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Multiwalled Carbon Nanotubes ◽  
High Adsorption ◽  
Multiwalled Carbon ◽  
Phenol Adsorption ◽  
Functionalized Multiwalled Carbon Nanotubes ◽  
High Adsorption Capacity ◽  
Pyrazoline Derivative

MWCNT-Py indicated a high adsorption capacity for phenol in comparison with MWCNT-COOH.

Sorption of Bisphenol A in Aqueous Solutions on Irradiated and as-Grown Multiwalled Carbon Nanotubes

2018 ◽  
Vol 69 (5) ◽  
pp. 1233-1239
Author(s):  
Raluca Madalina Senin ◽  
Ion Ion ◽  
Ovidiu Oprea ◽  
Rusandica Stoica ◽  
Rodica Ganea ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Bisphenol A ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Multiwalled Carbon Nanotubes ◽  
Adsorption Process ◽  
Sorption Process ◽  
Multiwalled Carbon ◽  
Before And After ◽  
Kinetic Sorption

In this study, non-irradiated and weathered multiwalled carbon nanotubes (MWCNTs) obtained through irradiation, were studied as adsorbents for BPA, both nanomaterials being characterized before and after the adsorption process. The objectives of our investigation were to compare the characteristics of non-irradiated and irradiated MWCNTs, to evaluate the adsorption capacity of BPA by pristine and irradiated MWCNTs and to determine the variation of the kinetic, sorption and thermodynamic parameters during sorption process using both sorbents.

Adsorptive extraction of uranium (VI) from seawater using dihydroimidazole functionalized multiwalled carbon nanotubes

2018 ◽  
Vol 106 (9) ◽  
pp. 719-731 ◽  
Author(s):  
Kun Tian ◽  
Jinling Wu ◽  
Jianlong Wang
Keyword(s):  
Carbon Nanotubes ◽  
Adsorption Capacity ◽  
Multiwalled Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Alkali Resistance ◽  
Multiwalled Carbon ◽  
X Ray ◽  
Infrared Scanning ◽  
Seawater Ph ◽  
Functionalized Multiwalled Carbon Nanotubes

Abstract The adsorptive extraction of uranium (VI) was investigated using multiwalled carbon nanotubes functionalized with dihydroimidazole (DIM-MWCNTs). Dihydroimidazole was grafted onto the surface of MWCNTs via silane coupling agent, N-(3-triethoxysilylpropyl)-4,5-dihydroimidazole. The new adsorbent was characterized using Fourier transform infrared, scanning electron microscope and X-ray Photoelectron Spectroscopy. DIM-MWCNTs were compared with MWCNTs and amidoxime modified MWCNTs (AO-MWCNTs) for uranium adsorption under seawater conditions. The adsorption capacity of uranium onto DIM-MWCNTs was 54.9 mg g−1 at 298 K, which was about 4 times of MWCNTs and similar to that of AO-MWCNTs. Compared with AO-MWCNTs, DIM-MWCNTs were more suitable for seawater pH, and less affected by vanadium. Although DIM-MWCNTs were more affected by carbonate than AO-MWCNTs, DIM-MWCNTs maintained a higher adsorption capacity than AO-MWCNTs due to its alkali resistance. Pyridine-like nitrogen (CH=N–CH) contributed to the adsorption of uranium. The results suggested that DIM-MWCNTs were a potential effective adsorbent for the separation of uranium under seawater condition.

Nitrogen-functionalised carbon nanotubes as a novel adsorbent for the removal of Cu(ii) from aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 2731-2745 ◽  
Author(s):  
Oluwaseun A. Oyetade ◽  
Vincent O. Nyamori ◽  
Bice S. Martincigh ◽  
Sreekantha B. Jonnalagadda
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
Functionalized Multiwalled Carbon Nanotubes

Nitrogen-functionalized multiwalled carbon nanotubes synthesized were effective and efficient for the removal of Cu2+ from aqueous solutions.

scholarly journals Removal and Adsorption ofp-Nitrophenol from Aqueous Solutions Using Carbon Nanotubes and Their Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Yuan-Xiang Yao ◽  
He-Bing Li ◽  
Jin-Yun Liu ◽  
Xin-Liang Tan ◽  
Jin-Gang Yu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Multiwalled Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Contaminated Water ◽  
Adsorption Ability ◽  
Multiwalled Carbon ◽  
Single Walled Carbon ◽  
Functionalized Multiwalled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In an attempt to explore the possibility of using carbon nanotubes (CNTs) as efficient adsorbents for removal of pollutants from the contaminated water, the adsorption ofp-nitrophenol (PNP) on raw multiwalled carbon nanotubes (r.MWNTs) with different outer diameters, various functionalized multiwalled carbon nanotubes (f-MWNTs), raw single-walled carbon nanotubes (r.SWNTs) and oxidized single-walled carbon nanotubes (ox-SWNTs) has been investigated. The ox-SWNTs showed better adsorption ability for PNP with different concentrations, while lower uptake capacity was found for all of the r.MWNTs andf-MWNTs. The removal efficiency of PNP by ox-SWNTs was around 98%, indicating that ox-SWNTs possess a great potential application prospect for removing PNP from aqueous solutions.

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