Shakila BEGUM

7081

Silver Removal from Aqueous Solution by Adsorption on Concrete Particles

The ability of concrete to remove silver from its aqueous solutions was studied. Silver removal is favored by low concentration and high pH at room temperature. The intrinsic acidity constants, average pKa1int and average pKa2int were determined. The calculated pHPZC (5.4) is in agreement with the pHPZC values determined from zeta potential measurements, indicating that the concrete particulate behaves amphoterically. The total acidity capacity for the negative and positive surface was 0.5 mC/cm2. A surface complex formation model (SCFM) was used to describe the adsorption of silver onto concrete particles. In general the equilibrium constants, the pKSi values, decrease as the silver loadings increase.

Anahtar Kelimeler:

Concrete, Equilibrium constants, Intrinsic acidity constants, Silver adsorption, Surface acidity

Silver Removal from Aqueous Solution by Adsorption on Concrete Particles

The ability of concrete to remove silver from its aqueous solutions was studied. Silver removal is favored by low concentration and high pH at room temperature. The intrinsic acidity constants, average pKa1int and average pKa2int were determined. The calculated pHPZC (5.4) is in agreement with the pHPZC values determined from zeta potential measurements, indicating that the concrete particulate behaves amphoterically. The total acidity capacity for the negative and positive surface was 0.5 mC/cm2. A surface complex formation model (SCFM) was used to describe the adsorption of silver onto concrete particles. In general the equilibrium constants, the pKSi values, decrease as the silver loadings increase.

Keywords:

Concrete, Equilibrium constants, Intrinsic acidity constants, Silver adsorption, Surface acidity,

Turkish Journal of Chemistry-Cover

ISSN: 1300-0527
Yayın Aralığı: 6
Yayıncı: TÜBİTAK

Arşiv

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