ACID-BASE PROPERTIES OF MONTMORILLONITE AND INTERACTIONS WITH ENZYMES THROUGH REM INVESTIGATIONS

Authors

  • A. AZZOUZ A. AZZOUZ Bacau University RO-5500
  • P NIQUETTE University of Osnabrueck, Germany
  • F MONETTE University of Osnabrueck, Germany
  • S ASAFTEI Université du Québec CP 8888, Succ. Centre-Ville Montréal,
  • R HAUSLER University of Osnabrueck, Germany
  • D NISTOR University RO-5500,
  • D. MIRON MIRON University RO-5500

Keywords:

montmorillonite, clay intercalation, ion-exchanged clays, NH3-TPD, CO2-TPD, acidbase properties, alkaline, alkaline earths, enzymes, environmental, coagulation-flocculation, immobilization

Abstract

Interactions of montmorillonite-rich clay materials with enzymes were investigated. A 2:1 layer type
raw clay mineral was purified, then ion-exchanged with Na+, K+ (Na-Mt and K-Mt), Ca2+ and Mg2+ (Ca-
Mt and Mg-Mt), and further contacted with various enzyme suspensions containing α-amylase, β-
amylase, cellulase, invertase, lipase, peroxidase, pectinase, urease, protease or tripsine. The acid and
base properties were measured via thermal programmed desorption of NH3 and CO2, respectively. It was
found that Ca-Mt and Mg-Mt exert stronger interactions with enzymes, generating coarser flake-shaped
clay particles, as compared to Na-Mt and K-Mt. This specific behaviour is explained in terms of clay
affinity towards enzymes, and correlated to the clay acid-base properties, that could have a great interest
for soil chemistry. The shape and the size of clay particles were also discussed through reflection
electron microscopy.

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Author Biographies

A. AZZOUZ A. AZZOUZ, Bacau University RO-5500

Catalysis and Microporous

Materials Laboratory
Bacau

P NIQUETTE, University of Osnabrueck, Germany

Laboratory of Organic Synthesis
and Electrochemistry

F MONETTE, University of Osnabrueck, Germany

Laboratory of Organic Synthesis
and Electrochemistry

S ASAFTEI, Université du Québec CP 8888, Succ. Centre-Ville Montréal,

STEPPE

R HAUSLER, University of Osnabrueck, Germany

Laboratory of Organic Synthesis
and Electrochemistry

D NISTOR, University RO-5500,

Catalysis and Microporous
Materials Laboratory
Bacau

D. MIRON MIRON, University RO-5500

Catalysis and Microporous
Materials Laboratory
Bacau

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Published

2004-12-22

How to Cite

A. AZZOUZ, A. A., NIQUETTE, P., MONETTE, F., ASAFTEI, S., HAUSLER, R., NISTOR, D., & MIRON, D. M. (2004). ACID-BASE PROPERTIES OF MONTMORILLONITE AND INTERACTIONS WITH ENZYMES THROUGH REM INVESTIGATIONS. Sciences & Technology. A, Exactes Sciences, (22), 89–96. Retrieved from https://revue.umc.edu.dz/a/article/view/225

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