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pH-Triggered Interfacial Interaction of Kaolinite/Chitosan Nanocomposites with Anionic Azo Dye

1
Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka 1000, Bangladesh
2
Department of Environmental Engineering, Kyungpook National University, Daegu 41566, Korea
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2019, 3(2), 39; https://doi.org/10.3390/jcs3020039
Received: 21 February 2019 / Revised: 25 March 2019 / Accepted: 28 March 2019 / Published: 8 April 2019
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Abstract

Advanced engineering of naturally occurring materials opens new doors in nanoscience and nanotechnology for the separation and/or removal of environmental hazards. Here, a series of nanocomposites containing kaolinite and chitosan varying in the range of 20 to 80% (w/w) kaolinite were used for the adsorptive removal of a reactive textile dye, Remazol Red, from an aqueous solution. Batch experiments were carried out to investigate the effects of pH, contact time, and initial dye concentration on the adsorption capacity. Nanocomposites containing 80% kaolinite (w/w) and 20% chitosan (w/w), i.e., NK80C20, showed an equilibrium adsorption capacity of 371.8 mg/g at pH 2.5, which was 5.2 times higher than that of commercial activated charcoal. Moreover, NK80C20 was regenerated instantly up to 99.9% at pH 10. Therefore, NK80C20 can be effectively utilized as a potential adsorbent for the separation of Remazol Red and homologous azo dyes from industrial effluents. We expect that the findings from this study will play a vital role in environmental research leading to advanced applications in water purification. View Full-Text
Keywords: nanocomposites; kaolinite; chitosan; Remazol Red; activated charcoal nanocomposites; kaolinite; chitosan; Remazol Red; activated charcoal
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Dey, S.C.; Moztahida, M.; Sarker, M.; Ashaduzzaman, M.; Shamsuddin, S.M. pH-Triggered Interfacial Interaction of Kaolinite/Chitosan Nanocomposites with Anionic Azo Dye. J. Compos. Sci. 2019, 3, 39.

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J. Compos. Sci. EISSN 2504-477X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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