BASIC CHARACTERISATION OF NATURAL BORNEAN OIL PALM SHELL AND ITS HEAVY METAL ADSORPTION

• Main Authors: Chong, Harry (Author), Chia, Pui San (Author)
• Format: Book
• Language: English
• Published: Kota Kinabalu Penerbit Universiti Malaysia Sabah 2014
• Edition: State or province government publication : English
• Subjects: Palm oil industry > By-products; Heavy metals > Absorption and adsorption; Agricultural industries > By-products; Agricultural wastes; Oil palm > Waste; Adsorption; Carbon, Activated
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 Oil palm shell, a waste from palm oil industry, was cleaned and utilized as adsorbent. Its particle size distribution gave the uniformity coefficient of approximately two indicating that it can be used as filter bed media for continuous operation without resting. Its measured pH(pzc) of 4.1 is below the common pH of constructed wetland water body suggesting positive adsorption for heavy metal. The effect of various parameters on its adsorption was studied via batch experiments. The adsorption of Cu(II) and Pb(II) ions by oil palm shell showed a slightly better fit with the Freundlich compared to Langmuir. Its monolayer adsorption capacities were found to be 1.756 and 3.390mg/g for Cu(II) and Pb(II), respectively. High correlation coefficient of over 0.99 given by the pseudo-second-order model suggests that the rate limiting factor may be chemisorption. These findings suggest its potential application as constructed wetland media for the removal of heavy metal.