Preparation and characterization of activated carbon derived from rubber wood

Teo, lawrence Kah Hoong (2005) Preparation and characterization of activated carbon derived from rubber wood. Universiti Malaysia Sabah. (Unpublished)

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Abstract

This project aims to prepare activated carbon (AC) from rubber wood ( Hevea brasiliensis ) activated with potassium hydroxide (KOH), followed by the physical and chemical characterization of the AC produced. Rubber wood impregnated with varying KOH concentrations was heated in a two-stage activation method. Rubber wood with higher KOH concentration produced less yields as KOH enhances pyrolytic decomposition. The pH test showed that the ACs prepared are acidic after reflux. Moisture content increases with increasing KOH concentration, averaging 4.71% whereas ash is independent of KOH concentration and averages 4.69%. Flame atomic absorption spectrophotometric analysis revealed the presence of Fe and Pb but the absence of Cd. Both methylene blue adsorption and iodine tests showed the AC adsorptive capacity increases with KOH concentration until 20% KOH corresponding to methylene blue adsorbed of 40mg/g and iodine number of 72.39mg/g before decreasing. Scanning electron microscopy analysis confirmed development of more refined pores with larger internal surface area as compared to untreated rubber wood.

Item Type: Academic Exercise
Uncontrolled Keywords: activated carbon (AC), Hevea brasiliensis , potassium hydroxide (KOH),pH
Subjects: Q Science > QD Chemistry
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM FAUZIAH MATSIN
Date Deposited: 04 Oct 2013 08:53
Last Modified: 17 Oct 2017 04:00
URI: http://eprints.ums.edu.my/id/eprint/7174

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