Macrocyclic host appended carbon nanotubes for selective adsorption of metal ions: combined experimental, DFT and MD studies

2019 ◽  
Vol 4 (3) ◽  
pp. 616-625
Author(s):  
A. K. Singha Deb ◽  
P. Sahu ◽  
Sk. M. Ali
Keyword(s):  
Carbon Nanotubes ◽  
Metal Ions ◽  
Crown Ethers ◽  
Metal Ion ◽  
Selective Adsorption ◽  
Ion Selectivity ◽  
Ion Recognition ◽  
Adsorption Of Metal Ions ◽  
Specific Metal

Crown ethers are very useful for metal ion recognition due to their nanocavity based specific ion selectivity, which on functionalization with carbon nanotubes (CNTs) can be employed as specific metal ion filters by exploiting their different interactions with metal ions.

A comparative study on selective adsorption of metal ions using aminated adsorbents

2013 ◽  
Vol 395 ◽  
pp. 230-240 ◽  
Author(s):  
Len Foong Koong ◽  
Koon Fung Lam ◽  
John Barford ◽  
Gordon McKay
Keyword(s):  
Comparative Study ◽  
Metal Ions ◽  
Selective Adsorption ◽  
Adsorption Of Metal Ions

scholarly journals STUDY OF REMOVAL OF METAL IONS IN WATER USING ZEOLITES SYNTHESIZED WITH CHARCOAL ASHES

2006 ◽  
Vol 05 (3) ◽  
pp. 21-30
Author(s):  
Denise Alves FUNGARO ◽  
Juliana de Carvalho IZIDORO
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Ion Selectivity ◽  
Coal Ash ◽  
Electroplating Effluent ◽  
Zeolitic Material ◽  
Equilibrium Data ◽  
Metal Ion Selectivity ◽  
Removal Of Metal ◽  
Removal Of Metal Ions

The capacity of synthesized zeolites from Brazilian coal ash for the removal of metal ions from aqueous solutions has been investigated. Equilibrium data obtained have been found to fit both the Langmuir and Freundlich adsorption isotherms. The zeolitic material prepared with coal ash from baghouse filter showed the highest removal efficiencies. The metal ion selectivity of this product was determined as: Pb2+ > Cd2+ > Cu2+ > Zn2+ > Ni2+. The maximum cation exchange capacities were between 32.9 and 246.9 mg g-1. Tests showed that the zeolitic material was suitable for removal of zinc from electroplating effluent.

A novel fluorescent probe based on biphenyl and rhodamine for multi-metal ion recognition and its application

2018 ◽  
Vol 47 (10) ◽  
pp. 3378-3387 ◽  
Author(s):  
Xu Tang ◽  
Yun Wang ◽  
Juan Han ◽  
Liang Ni ◽  
Huiqin Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Fluorescent Probe ◽  
Metal Ion ◽  
Ion Recognition

A novel fluorescent probe for the detection of multi metal ions was designed and synthesized based on the fluorophores of biphenyl and rhodamine.

scholarly journals Metal Ion Selectivity of Kojate Complexes: A Theoretical Study

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Sarita Singh ◽  
Jyoti Singh ◽  
Sunita Gulia ◽  
Rita Kakkar
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Density Functional ◽  
Ion Selectivity ◽  
Divalent Metal Ions ◽  
High Energies ◽  
Square Planar ◽  
Metal Ion Selectivity ◽  
Carbonyl Bond ◽  
Complexation Reactions

Density functional calculations have been performed on four-coordinate kojate complexes of selected divalent metal ions in order to determine the affinity of the metal ions for the kojate ion. The complexation reactions are characterized by high energies, showing that they are highly exothermic. It is found that Ni(II) exhibits the highest affinity for the kojate ion, and this is attributed to the largest amount of charge transfer from the ligand to the metal ion. The Ni(II) complex has distorted square planar structure. The HOMOs and LUMOs of the complexes are also discussed. All complexes display a strong band at ~1500 cm−1 corresponding to the stretching frequency of the weakened carbonyl bond. Comparison of the complexation energies for the two steps shows that most of the complexation energy is realized in the first step. The energy released in the second step is about one-third that of the first step.

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