Isolation and Characterization of a Smectite as a Micro-Mesoporous Material from a Bentonite

Müşerref ÖNAL; Yüksel SARIKAYA; Tülay ALEMDAROĞLU; İhsan BOZDOĞAN

Article Details

Isolation and Characterization of a Smectite as a Micro-Mesoporous Material from a Bentonite

Authors:

Müşerref ÖNAL | Yüksel SARIKAYA | Tülay ALEMDAROĞLU | İhsan BOZDOĞAN

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2003 Vol.27 Issue 6, pp.683-694

Document Type:

Article

Publication Date:

5/2003

Document Language:

Turkish

Document ID (Org No.):

2000729445

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527

Abstract:

 

A procedure was assessed for obtaining an optimum amount of  a micro-mesoporous material known as smectite from Reşadiye  (Tokat/Turkey) bentonite.  The procedure, which will permit a better  economic evaluation of the Reşadiye reserves, is based on successive  settlements of bentonite suspensions during various time intervals.   To characterize the original bentonite, its fractions and the high  purity smectite product, X-ray diffraction, differential thermal  analysis, thermogravimetric analysis, scanning electron microscopy and  nitrogen adsorption-desorption techniques were used.  The original  bentonite contained 50% by mass sodium-rich smectite (NaS) and 10%  by mass NaCa-smectite (NaCaS).  It also contained illite,  clinoptilolite, analcime, feldspar, calcite, dolomite, quartz and  opal-C. It was determined that the NaCaS particles were laminated  whereas the NaS particles were delaminated.  The specific surface  areas of the original bentonite and NaS were respectively 27 m2  g-1 and 43 m2 g-1 and the specific micropore-mesopore volumes  were respectively 0.055 cm3 g-1 and 0.065 cm3 g-1.  It was  established that the porosity increased after purification.  It was  concluded that it was possible to isolate a micro-mesoporous material,  i.e. high purity NaS, with a yield of 50% from the aqueous suspension  of bentonite.  The procedure did not require the use of any chemical  reagent.

 

A procedure was assessed for obtaining an optimum amount of  a micro-mesoporous material known as smectite from Reşadiye  (Tokat/Turkey) bentonite.  The procedure, which will permit a better  economic evaluation of the Reşadiye reserves, is based on successive  settlements of bentonite suspensions during various time intervals.   To characterize the original bentonite, its fractions and the high  purity smectite product, X-ray diffraction, differential thermal  analysis, thermogravimetric analysis, scanning electron microscopy and  nitrogen adsorption-desorption techniques were used.  The original  bentonite contained 50% by mass sodium-rich smectite (NaS) and 10%  by mass NaCa-smectite (NaCaS).  It also contained illite,  clinoptilolite, analcime, feldspar, calcite, dolomite, quartz and  opal-C. It was determined that the NaCaS particles were laminated  whereas the NaS particles were delaminated.  The specific surface  areas of the original bentonite and NaS were respectively 27 m2  g-1 and 43 m2 g-1 and the specific micropore-mesopore volumes  were respectively 0.055 cm3 g-1 and 0.065 cm3 g-1.  It was  established that the porosity increased after purification.  It was  concluded that it was possible to isolate a micro-mesoporous material,  i.e. high purity NaS, with a yield of 50% from the aqueous suspension  of bentonite.  The procedure did not require the use of any chemical  reagent.

Article Details

Isolation and Characterization of a Smectite as a Micro-Mesoporous Material from a Bentonite

Authors: Müşerref ÖNAL | Yüksel SARIKAYA | Tülay ALEMDAROĞLU | İhsan BOZDOĞAN

Publisher: TUBITAK

Journal: Turkish Journal of Chemistry 2003 Vol.27 Issue 6, pp.683-694

Document Type: Article

Publication Date: 5/2003

Document Language: Turkish

Document ID (Org No.): 2000729445

Frequency: Bimonthly

eISSN: 1303-6130

pISSN: 1300-0527

Issues

Authors:

Müşerref ÖNAL | Yüksel SARIKAYA | Tülay ALEMDAROĞLU | İhsan BOZDOĞAN

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2003 Vol.27 Issue 6, pp.683-694

Document Type:

Article

Publication Date:

5/2003

Document Language:

Turkish

Document ID (Org No.):

2000729445

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527