Evaluation of Characteristics of Activated Carbon from Rice Husk Impregnated with Zinc Chloride and Phosphoric Acid
American Journal of Physical Chemistry
Volume 5, Issue 5, October 2016, Pages: 94-98
Received: Oct. 5, 2016; Accepted: Oct. 14, 2016; Published: Nov. 10, 2016
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Authors
Mohamed Ahiduzzaman, Department of Agro-processing, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
Abul K. M. Sadrul Islam, Department of Mechanical and Chemical Engineering, Islamic University of Technology, Gazipur, Bangladesh
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Abstract
Activated carbon is essential in adsorption process of different dye and metals from waste streams. The molecular size of different species is different. So they could have some restriction to move into the pore in activated carbons smaller than their molecule size. In this regards a study is conducted to evaluate the adsorption characteristics of zinc chloride and phosphoric acid impregnated activated carbon. Methylene blue (MB) and nitrogen having two distinct molecular sizes are adsorbed to evaluate the adsorption characteristics of the activated carbons. Nitrogen molecules have access into smaller pores compared to MB molecules. Nitrogen adsorption test shows higher specific surface area compared to MB adsorption test. In methylene adsorption test, phosphoric acid impregnated activated carbon shows higher specific surface area (646 m2 g-1) compared to that of zinc chloride impregnated activated carbon (599 m2 g-1). In contrast zinc chloride shows higher specific surface area (927 m2 g-1) compared to that of phosphoric acid impregnated activated carbon (718 m2 g-1) in liquid nitrogen adsorption test. This happened because zinc chloride could develop smaller size pore in higher degree compared phosphoric acid during activation process. Results show that development of pore size is affected by two different agents. MB and nitrogen adsorption test reveals that zinc chloride activated material produced more number of small pores compared to phosphoric acid activated material. From this study it is concluded that the desired size of pores in activated carbon could be achieved for adsorption of species with specific molecular diameter by varying the type of activation agents.
Keywords
Activated Carbon, BET Surface Area, Activation Agent, SEM Image, Contact Time Study
To cite this article
Mohamed Ahiduzzaman, Abul K. M. Sadrul Islam, Evaluation of Characteristics of Activated Carbon from Rice Husk Impregnated with Zinc Chloride and Phosphoric Acid, American Journal of Physical Chemistry. Vol. 5, No. 5, 2016, pp. 94-98. doi: 10.11648/j.ajpc.20160505.12
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Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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