Removal of iron and manganese from aqueous solutions using carbon nanotube filters

2015 ◽  
Vol 16 (2) ◽  
pp. 347-353 ◽  
Author(s):  
E. M. I. Elsehly ◽  
N. G. Chechenin ◽  
K. A. Bukunov ◽  
A. V. Makunin ◽  
A. B. Priselkova ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Metal Ion ◽  
Diameter Distribution ◽  
Outer Diameter ◽  
Multiwalled Carbon ◽  
Metal Ion Removal ◽  
Heavy Metal Ion Removal

Carbon nanotubes (CNTs) have become the focus of attention of many scientists and companies worldwide. CNT-based filters have a prospective advantage in comparison to the commercial filters already in operation because they are light weight and do not require electricity to operate. This investigation handles the filtration efficiency of manganese and iron from aqueous solution using commercial multiwalled carbon nanotubes (MWCNTs) (Taunit). The effects of different parameters such as CNT filter mass, concentration of manganese and iron in aqueous solution and pH of aqueous solution on removal of these heavy metals are determined. From these investigations, the removal efficiency of manganese and iron could reach 71.5% and 52% respectively for concentration 50 ppm, suggesting that Taunit is an excellent adsorbent for manganese and iron removal from water. There was a significant increase in removal efficiency at pH = 3 for manganese and pH = 8 for iron. The effect of oxidation on the structural of MWCNTs was characterized by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) techniques to investigate the functionalization with oxygen-containing and outer diameter distribution. It was found that functionalized CNT-based filters are more efficient at removing manganese and iron from aqueous solutions. Oxidized MWCNTs may be a promising candidate for heavy metal ion removal from industrial wastewater.

scholarly journals Functionalized carbon nanotubes based filters for chromium removal from aqueous solutions

2017 ◽  
Vol 75 (7) ◽  
pp. 1564-1571 ◽  
Author(s):  
Emad M. Elsehly ◽  
N. G. Chechenin ◽  
A. V. Makunin ◽  
H. A. Motaweh ◽  
E. G. Leksina
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ion ◽  
High Performance ◽  
Diameter Distribution ◽  
Outer Diameter ◽  
Chromium Removal ◽  
Multiwalled Carbon

This investigation examines the filtration efficiency of chromium from aqueous solution using two types of commercial multiwalled carbon nanotubes (MWCNTs) (Taunit-M (TM) and Taunit-MD (TMD)). These MWCNTs were modified using two complementary treatments, purification (using a mixture of hydrochloric acid and hydrogen peroxide) and functionalization (using nitric acid). The effect of these treatments on the morphology of MWCNT Taunit filters was characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy to estimate the outer diameter distribution and element content deposited on filters. Effects of different parameters, i.e., carbon nanotube filter mass, concentration of chromium in aqueous solution, and pH of aqueous solution, on removal of this heavy metal were determined. From these investigations, the removal efficiency of chromium could reach 97% for modified TM and 70% for modified TMD at concentration of 10 ppm, suggesting that modified TM is an excellent adsorbent for chromium removal from aqueous solutions and more efficient than modified TMD. A significant increase in chromium removal by modified TM at pH = 2 has been observed compared with higher pH values. It was found that modified TM filters can be reused through many cycles of regeneration with high performance. Modified TM filters may be a promising candidate for heavy metal ion removal from industrial wastewater.

Zeolite and short-cut fiber-based wet-laid filter media for particles and heavy metal ion removal of wastewater

2019 ◽  
pp. 152808371986693
Author(s):  
Kyung Chul Sun ◽  
Jung Woo Noh ◽  
Yeong Og Choi ◽  
Sung Hoon Jeong ◽  
Yeon Sang Kim
Keyword(s):  
Removal Efficiency ◽  
Metal Ion ◽  
High Efficiency ◽  
Solid Particles ◽  
Filter Media ◽  
Main Layer ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal ◽  
Efficiency Rate

As development of industrialization grows constantly, the purification of hazardous solid particles and ions is one of the most important topics in environment and ecosystem. In this report, we designed and developed a novel and advanced type of filter media for the removal of both solid particles and hazardous ions, we choose Cs+ and Ca2+ here, by enclosing zeolite in wet-laid nonwoven media. The performance of the prepared filter media was evaluated by continuous sorption experiments, which were followed by solid particles and ion-removal efficiency studies. The prepared filter media showed excellent uniformity. The prepared filter media exhibited a solid removal efficiency rate which ranged from 80 to 82%, and the initial removal efficiency of ions exceeded 99%. These values are in effect as the main layer in the completed liquid filter media and for the next step to prepare the completed multi-layered liquid filter units. The results here suggest that this novel filter media can be used in high-efficiency and multi-functional liquid filter units for residential and industrial engineering.

Efficient heavy metal ion removal by triazinyl-β-cyclodextrin functionalized iron nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (110) ◽  
pp. 90602-90608 ◽  
Author(s):  
Amir Abdolmaleki ◽  
Shadpour Mallakpour ◽  
Sedigheh Borandeh
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ion ◽  
Iron Nanoparticles ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal ◽  
Nano Adsorbent

A novel magnetic nano-adsorbent containing Fe3O4 nanoparticles functionalized with MCT-β-CD was fabricated and exhibited a remarkable enhancement in heavy metal removal efficiency from aqueous solutions.

Thermoresponsive Ion-Imprinted Composite Hydrogels for Heavy Metal Ion Removal

2013 ◽  
Vol 661 ◽  
pp. 162-165 ◽  
Author(s):  
Jing Jing Wang ◽  
Xian Ning Li
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Ion Imprinted ◽  
Heavy Metal Ion Removal ◽  
Gel Transition

A novel thermoresponsive Cu(II) ion-imprinted composite hydrogel [Cu(II)-IICH] based on N-isopropylacrylamide (NIPAM) and aminated silica (SiO2-NH2) has been prepared by in situ free-radical polymerization using Cu(II) ion as template. The Cu(II)-IICH was used to remove heavy metal ions from aqueous solution at 20 and 40oC. The Cu(II)-IICH selectively bound the template ion above a critical gel transition temperature (CGTT) of crosslinked poly(N-isopropylacrylamide) (PNIPAM). The memory was fixed by shrinking above the CGTT, and was deleted by swelling below the CGTT. In order to study the reusability of the Cu(II)-IICH, the sorption-desorption cycles were performed for five times. The results suggested that the Cu(II)-IICH can be used for several times without significantly decreasing its adsorption capacity.

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 Phosphorylated cellulose paper as highly efficient adsorbent for cadmium heavy metal ion removal in aqueous solutions

RSC Advances ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 1084-1094
Author(s):  
El-Houssaine Ablouh ◽  
Zineb Kassab ◽  
Fatima-zahra Semlali Aouragh Hassani ◽  
Mounir El Achaby ◽  
Houssine Sehaqui
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Metal Ion Removal ◽  
Cellulose Paper ◽  
Ion Removal ◽  
Heavy Metal Ion Removal ◽  
Efficient Adsorbent ◽  
Adsorbent Materials

In search for more effective and eco-friendly adsorbent materials, this study comprehensively investigated Cd2+ adsorption onto phosphorylated cellulose paper (PCP).

Mussel inspired functionalization of carbon nanotubes for heavy metal ion removal

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68430-68438 ◽  
Author(s):  
Yili Xie ◽  
Qiang Huang ◽  
Meiying Liu ◽  
Ke Wang ◽  
Qing Wan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Ion ◽  
Addition Reaction ◽  
Michael Addition Reaction ◽  
Functionalized Carbon Nanotubes ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal ◽  
Functionalization Of Carbon Nanotubes ◽  
The Michael Addition

Polyethylenimine functionalized carbon nanotubes were prepared through mussel inspired chemistry and the Michael addition reaction, and utilized for the adsorption of Cu2+ from water.

scholarly journals Removal of atenolol from aqueous solutions by multiwalled carbon nanotubes modified with ozone: kinetic and equilibrium study

2018 ◽  
Vol 2017 (3) ◽  
pp. 636-649 ◽  
Author(s):  
Bahare Dehdashti ◽  
Mohammad Mehdi Amin ◽  
Hamidreza Pourzamani ◽  
Lida Rafati ◽  
Mehdi Mokhtari
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Multiwalled Carbon Nanotubes ◽  
Removal Efficiency ◽  
Contact Time ◽  
Maximum Adsorption Capacity ◽  
Multiwall Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Initial Concentration ◽  
Multiwall Carbon

Abstract The aim of study is removal of atenolol from aqueous solutions by multiwalled carbon nanotubes modified with ozone. The design of the experiment was adopted across four levels with the L16 matrix arrangement. The factors influencing atenolol adsorption include changes in the pH value, contact time, the dose of the modified multiwall carbon nanotube, and the initial concentration of atenolol in the solution; these factors were evaluated along with the extent of their influence on removal efficiency. Data analyses were performed by the Design Expert 6 software. The results indicated that the pH, contact time, adsorbent dose, and the initial concentration were 7, 20 min, 0.15 g/L and 1 mg/L, respectively. In this state, the removal efficiency was calculated to be 75.79%. The maximum adsorption capacity was obtained as 5.05 mg/g under optimal conditions. The data were analyzed using adsorption models obtained from the isotherm fitting tool software. The results suggested that the data had a greater congruence with the Freundlich model (corrected Akaike information criterion = 2.58). Furthermore, the kinetics of the reactions followed pseudo second order kinetics (R2 = 0.95). Based on this study, it can be concluded that modified multiwall carbon nanotubes enjoy high potential and efficiency as adsorbents for the removal of atenolol from aqueous solutions.

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