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Acid-activated Sodium Bentonite and Kaolin Clay: Comparative Study by Physicochemical Properties

[ Vol. 23 , Issue. 5 ]

Author(s):

Awinash Kumar* and Pradip Lingfa   Pages 433 - 445 ( 13 )

Abstract:


Aims and Objective: This paper aims to reveal the useful industrial aspects of kandite and montmorillonite group of clays using as a catalyst after acid activation. A comparative study of modified characteristics of clay samples has been explored based on industrial requirements.

Materials and Methods: In this study sodium bentonite and kaolin clay have been focused. The modified characteristics of clay samples are investigated by characterization methods of FT-IR, XRD, SEM/EDAX, TGA and DSC before and after treated with 4M of Hydrochloric acid. Clay samples were refluxed at 105ºC and calcined at 500ºC consecutively for 3 hours at room temperature.

Results: Maximum crystalline size 104.02 nm has been evaluated for acid-activated sodium bentonite. Alkyl halides compounds have a strong band position for all samples and have more extent on acid activation. The small numbers of manganese particles have been noticed in the acidactivated samples. 14% of decrement and 61.02% of increment of aluminates have been found respectively for acid-activated kaolin and acid-activated sodium bentonite.

Conclusion: The novelty of this study is about sodium bentonite characterization and the results show the prominent behaviour with structural, elemental, morphological, and thermal analysis. Acid-activated kaolin sample has less effect in comparison with acid-activated sodium bentonite. As the removal of the hydroxyl group of compounds has been reported through FT-IR and XRD analysis also some other industries like ceramic and paper industries may have accepted these types of modified minerals for special production with a simple process.

Keywords:

Kaolin clay, sodium bentonite clay, acid-activation, physicochemical properties, thermal analysis, characterization.

Affiliation:

Department of Mechanical Engineering, North Eastern Regional Institute of Science and Technology (Deemed to be University, Govt. of India), Nirjuli, Itanagar, Arunachal Pradesh 791109, Department of Mechanical Engineering, North Eastern Regional Institute of Science and Technology (Deemed to be University, Govt. of India), Nirjuli, Itanagar, Arunachal Pradesh 791109



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