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Study of the adsorption of glycine by two local clays of Congo Brazzaville

Author Affiliations

  • 1Laboratoire de Chimie minerale et Appliquee, Faculte des sciences et Techniques, University Marien Ngouabi, B.P. 69, Brazzaville, Congo
  • 2Laboratoire de Chimie minerale et Appliquee, Faculte des sciences et Techniques, University Marien Ngouabi, B.P. 69, Brazzaville, Congo and Ecole Normale Superieure, University Marien Ngouabi, B.P. 69, Brazzaville, Congo
  • 3Laboratoire de Chimie minerale et Appliquee, Faculte des sciences et Techniques, University Marien Ngouabi, B.P. 69, Brazzaville, Congo
  • 4Laboratoire de Chimie minerale et Appliquee, Faculte des sciences et Techniques, University Marien Ngouabi, B.P. 69, Brazzaville, Congo
  • 5Laboratoire de Chimie minerale et Appliquee, Faculte des sciences et Techniques, University Marien Ngouabi, B.P. 69, Brazzaville, Congo and Ecole Normale Superieure, University Marien Ngouabi, B.P. 69, Brazzaville, Congo

Int. Res. J. Environment Sci., Volume 10, Issue (2), Pages 52-63, April,22 (2021)


In this work, we are studying the interaction of two Congolese clays with glycine, the clays soils collected in the localities of Missafou and Mouyondzi. The two adsorbents have been characterized beforehand. Mineralogical analysis is determined using different techniques (DRX, IR, ATD, ATG, DTG). Among the physicochemical properties, the chemical composition is obtained by ICP-AES, the CEC is evaluated by the Metson method. The surface properties are derived from the nitrogen adsorption / desorption isotherm on the MISA-B and MOU samples. The geotechnical properties (particle size and Atterberg limits) were measured. The results of the characterization showed that Talc is the predominant species in Missafou clay. Batch mode adsorption tests have shown us that the adsorption capacity of glycine on Mouyondzi clay is better. Langmuir\'s model better describes these adsorption isotherms.


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