Silver Removal from Aqueous Solution by Adsorption on Concrete Particles

Shakila BEGUM

Article Details

Silver Removal from Aqueous Solution by Adsorption on Concrete Particles

Authors:

Shakila BEGUM

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2003 Vol.27 Issue 5, pp.609-618

Document Type:

Article

Publication Date:

4/2003

Document Language:

Turkish

Document ID (Org No.):

2000729503

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527

Abstract:

 

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.

 

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.

Article Details

Silver Removal from Aqueous Solution by Adsorption on Concrete Particles

Authors: Shakila BEGUM

Publisher: TUBITAK

Journal: Turkish Journal of Chemistry 2003 Vol.27 Issue 5, pp.609-618

Document Type: Article

Publication Date: 4/2003

Document Language: Turkish

Document ID (Org No.): 2000729503

Frequency: Bimonthly

eISSN: 1303-6130

pISSN: 1300-0527

Issues

Authors:

Shakila BEGUM

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2003 Vol.27 Issue 5, pp.609-618

Document Type:

Article

Publication Date:

4/2003

Document Language:

Turkish

Document ID (Org No.):

2000729503

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527