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Adsorption of Zinc from Aqueous Solution by Using Natural Adsorbents

Abdul Razak, Mohd Hairi (2007) Adsorption of Zinc from Aqueous Solution by Using Natural Adsorbents. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Several studied have pointed out natural adsorbent efficiently in the removal of heavy metal ion present in aqueous solution. Contact time, pH and adsorbent concentration seem to be the major operating parameters in the metal concentration control. The mechanisms of interactions between metal and solid are a function of pH and are found to be precipitation, adsorption or ion exchange. The objectives ofthis work were to study the removal of heavy metal in water by sorption onto date seeds, clove, star anise and cinnamon. This research was done on lab scale experiments to study efficiency of date seeds, cloves, star anise and cinnamon powder in removing heavy metals from aqueous solution. Solutions of varying concentrations of heavy metals of 1,10 and 100 ppm were prepared and added with adsorbent than shake in orbital shaker for 1, 3, 6 and 24 hours. Next, the sample of solution been filtered to remove insoluble material and analyzed for concentration of heavy metal ions using spectrophotometer. Concentrations of adsorbent also were varied to study the removal efficiency of heavy metals. Final metal ion concentrations in solution and adsorption isotherm were determined. Base on the experiment, date seeds, clove, star anise and cinnamon shown 92, 91, 82 and 87 percentage of zinc removal. While adsorption capacity was obtained 1.58 mg/g for date, 3.03 mg/g for clove, 0.68 mg/g for star anise and 5.44 mg/g for cinnamon. Kf value for date seed, clove, star anise and cinnamon was 1.41, 3.5, 0.54 and 3.57. While the value for n for date seeds, clove, star anise and cinnamon was 1.48, 1.06, 0.54 and 3.57. The pH for clove, star anise and cinnamon were in range of 4 to 7 pH. While date seeds were in range of 5 to 8 pH. All the results is consistent with the Freundlich parameter that indicate, the smaller the value of 1/n means that adsorption bond is strong.

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Water and environment - Water
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 22 Oct 2013 09:26
Last Modified: 22 Oct 2013 09:26
URI: http://utpedia.utp.edu.my/id/eprint/8983

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