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Characterization and Synthesis of Chitosan-Silica Gel and Chitosan-Bentonite Composites for Adsorption of Heavy Metals


Affiliations
1 Department of Environmental Sciences, College of Basic Science and Humanities, G. B. Pant University of Agriculture and Technology, Pantnagar, 263145, India
 

There are several ways to curtail the cost of wastewater treatment. This desire was fuelled in the current study of different composites prepared with modified chitosan by immobilization onto bentonite and silica gel and their characterization by using different sensitive techniques such as FTIR, SEMEDS and TGA. The assessment of synthesized composites was done for its suitability as bioadsorbent characteristics. Silica gel chitosan composite showed peaks at 1082 cm-1, 1316 cm-1 3420 cm-1 and at 3614 cm-1. While, bentonite chitosan composite reveals major peak 1572 cm-1, 3648 cm-1, 3462 cm-1, 1650 cm-1 and 1001cm-1. SEM-EDS study showed their morphology, element composition that correlates the adsorption efficiency. However, TGA study showed their detailed study on thermal stability as more thermally stable compound which is the characteristic feature for adsorption and desorption phenomenon.

Keywords

Bio-Composites, De-Acetylation, Adsorption, Wastewater.
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  • Characterization and Synthesis of Chitosan-Silica Gel and Chitosan-Bentonite Composites for Adsorption of Heavy Metals

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Authors

Sarita Joshi
Department of Environmental Sciences, College of Basic Science and Humanities, G. B. Pant University of Agriculture and Technology, Pantnagar, 263145, India
R. K. Srivastava
Department of Environmental Sciences, College of Basic Science and Humanities, G. B. Pant University of Agriculture and Technology, Pantnagar, 263145, India

Abstract


There are several ways to curtail the cost of wastewater treatment. This desire was fuelled in the current study of different composites prepared with modified chitosan by immobilization onto bentonite and silica gel and their characterization by using different sensitive techniques such as FTIR, SEMEDS and TGA. The assessment of synthesized composites was done for its suitability as bioadsorbent characteristics. Silica gel chitosan composite showed peaks at 1082 cm-1, 1316 cm-1 3420 cm-1 and at 3614 cm-1. While, bentonite chitosan composite reveals major peak 1572 cm-1, 3648 cm-1, 3462 cm-1, 1650 cm-1 and 1001cm-1. SEM-EDS study showed their morphology, element composition that correlates the adsorption efficiency. However, TGA study showed their detailed study on thermal stability as more thermally stable compound which is the characteristic feature for adsorption and desorption phenomenon.

Keywords


Bio-Composites, De-Acetylation, Adsorption, Wastewater.

References