Preparation And Characterisition Of Activated Carbon From Rice Husk

Yii, Frankie (2005) Preparation And Characterisition Of Activated Carbon From Rice Husk. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Activated Carbon is a key element in a number of control technologies as it is an extremely effective adsorbent. It possesses a high surface area per unit weight, and intricate pore structure. The rice husk (oryza sativa) mostly found in the tropical region is the by-product produced from rice production industries. The rice husk used for the research purposes not having high commercial sources have been used, selected as a suitable raw material. In this study, an activated carbon was obtained from rice husks by impregnation with different amount of phosphoric acid and in a self-generated atmosphere two step method which involve physical activation in muffie furnace. Experiments were carried out by chemical activation and the process parameter is concentration of impregnating reagent. Phosphoric acid is a very common method for obtaining activated carbons with very high surface area. The resulting carbons were characterized by removal of methylence blue and iodine from aqueous solution. Surface morphology carried out on the samples of rice husk based activated carbon after activation and using scanning electron microscope.Physically activated carbons yield a poor adsorbing capacity (256.68 mg/g of iodine absorbed and 220.39 mg/g of methylene blue absorbed) due to the blockage of pores by decomposition products of lignocellulosic materials. Optimum absorption capacity was obtained when the samples were subjected to chemical activation. The absorption capacity increases as the amount of impregnation ratio increase.

Item Type: Academic Exercise
Uncontrolled Keywords: Carbon, oryza sativa, tropical region, rice production industries, absorption capacity, impregnation ratio
Subjects: S Agriculture > SB Plant culture
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 31 Dec 2013 03:35
Last Modified: 17 Oct 2017 05:24
URI: http://eprints.ums.edu.my/id/eprint/7480

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