scholarly journals Effect of Different Cations on the Adsorption of Dy3+, Gd3+, Eu3+ and Sm3+ Ions on Activated Charcoal from Aqueous Solutions

1996 ◽  
Vol 13 (1) ◽  
pp. 27-29
Author(s):  
Riaz Qadeer ◽  
Imtiaz Hanif ◽  
Javed Hanif
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Charge Density ◽  
Activated Charcoal ◽  
Room Temperature ◽  
Adsorption Of Metal Ions ◽  
R Value

The effect of different cations on the adsorption of Dy3+, Gd3+, Eu3+ and Sm3+ ions on activated charcoal from aqueous solutions (pH = 4.0) has been studied at room temperature (295 ± 1 K). Their effect on the adsorption of the metal ions has been correlated with the charge density (Z/r) of the cations. It was observed that cations with a larger Z/r value reduced the adsorption of metal ions more than cations with smaller Z/r values. It was also observed that the ease of adsorption of the metal ions followed the sequence: Dy3+ > Gd3+ > Eu3+ > Sm3+. Such data are important in relation to the recovery of metal ions from solution.

Thermodynamics Study of Removal of Heavy Metal by TiN-Nanotubes

2015 ◽  
Vol 14 (03) ◽  
pp. 1450024
Author(s):  
Leila Mahdavian
Keyword(s):  
Heavy Metal ◽  
Thermodynamic Properties ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Room Temperature ◽  
Basis Set ◽  
Surface Species ◽  
Computer Calculations ◽  
Gaussian Program ◽  
Metal Ions Removal

The ability of TiN -nanotube to remove lead ( Pb ( II )) and arsenic ( As ( III )) ions from aqueous solutions is investigated. The thermodynamics properties of Pb ( II ) and As ( III ) ions passing through TiN -nanotubes ( TiN - NTs ) is calculated in basis set (B3LYP/6-31G**) DFT-IR method by Gaussian program package. The results showed, Pb ( II ) and As ( III ) passing through had low potential in middle nanotubes, and are trapped in this place. The thermodynamic properties showed; the passing through are spontaneous and favorable because ΔGele (MJ/mol) is negative for them. The goal of this study is the detection of surface species of TiN - NTs for metal ions removal by using computer calculations. The structural and thermodynamic properties studied ions absorption on TiN - NTs at room temperature.

scholarly journals Selective Adsorption of Europium on Activated Charcoal from Aqueous Solutions

1992 ◽  
Vol 9 (1) ◽  
pp. 1-16 ◽  
Author(s):  
M. Saleem ◽  
M. Afzal ◽  
RiaZ Qadeer ◽  
Javed Hanif
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Activated Charcoal ◽  
Selective Adsorption ◽  
Fluorescence Spectrometry ◽  
Thermodynamic Quantities ◽  
X Ray ◽  
Europium Concentration ◽  
Ph Concentration

The adsorption of europium on activated charcoal has been studied as a function of shaking time, pH, concentration of adsorbate and temperature. The adsorption of europium obeys the Langmuir and Dubinin-Radushkevich isotherms. Thermodynamic quantities such as ΔH0 and ΔS0 have been calculated from the slopes and intercepts of plots of In KD versus 1/T. The influence of different cations and anions on europium adsorption has been examined. The adsorption of other metal ions on activated charcoal has been investigated under specified conditions to check their selectivity for europium. As a result, europium has been successfully removed from a mixture containing Ba, Sr, Ru, Cs, Cr, Nd, Pr and In. Approximately 96% of the europium adsorbed on the activated charcoal was recovered using 45 ml of 3 M HNO3. X-ray fluorescence spectrometry was used for measuring the europium concentration.

Selective Adsorption of Strontium on Activated Charcoal from Electrolytic Aqueous Solutions

1992 ◽  
Vol 57 (10) ◽  
pp. 2065-2072 ◽  
Author(s):  
Riaz Qadeer ◽  
Javed Hanif ◽  
Muhammad Saleem ◽  
Muhammad Afzal
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Activated Charcoal ◽  
Selective Adsorption ◽  
X Ray ◽  
Langmuir Isotherms ◽  
Strontium Concentration ◽  
Fluorescence Spectrometer ◽  
Ph Concentration

The adsorption of strontium on activated charcoal has been studied as a function of shaking time, pH, concentration of adsorbate and temperature. Wavelength dispersive X-ray fluorescence spectrometer was used for measuring strontium concentration. The adsorption of strontium obeys Freundlich and Langmuir isotherms. Quantities ∆H0 and ∆S0 were calculated from the slope and intercept of plot ln KD vs 1/T. The influence of different cations and anions on strontium adsorption has been examined. The adsorption of other metal ions on activated charcoal has been studied under specific conditions to check its selectivity. Consequently, strontium was removed from Rh, Pr, Rb and Cs. More than 95% adsorbed strontium on activated charcoal can be recovered with 65 ml 3M HNO3 solution.

Quantitative aspects of the adsorption of metal ions from aqueous solutions to container surfaces

1980 ◽  
Vol 59 (1) ◽  
pp. 55-62
Author(s):  
H. A. Das ◽  
A. Faanhof ◽  
J. M. Gouman ◽  
P. C. A. Ooms
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Adsorption Of Metal Ions
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