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Precipitation of Heavy Metals Using "Cuttlebone-Citrus Aurantifolia"(CB-CA )

Aziz, Ahmad Azfar (2008) Precipitation of Heavy Metals Using "Cuttlebone-Citrus Aurantifolia"(CB-CA ). Universiti Teknologi Petronas. (Unpublished)

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Abstract

This project presents the research on heavy metals removal from aqueous solution by chemical precipitation using low cost coagulant which could be used as an alternative approach to remove heavy metals from water. The low cost coagulants that are used inremoving heavy metals in aqueous solution were CB which stand for cuttlebone and CA which stand for (Citrus Aurantifolia) or also known askey lime. The optimum pH and optimum volume of coagulants were varied for each metals and it was depend on the characteristics of the heavy metals treated and were determined from several jar tests performed through out this project. To obtain the optimum pH, the pH ofthe solutions was set at increased from acidic to alkaline by adding the CB-CA solution. Each beaker was added 150 ml of heavy metals and stirrer was operated at 60 rpm for 1 minute for a rapid mix. Then, the rpm was decreased to 20 rpm for slow mix for 20 minutes. After 20 minutes, stirrer was turn off and settling was allowed for 20 minutes. The solution then was filtered to remove the remaining particles that did not settle at the bottom of the beaker. The volumes of the CB-CA solution added were recorded. Once the optimum pH was obtained, the optimum volume of CB was determined byvarying the volume added at the optimum pH level. The volume that results in the most removal was identified as the optimum volume for the coagulant tested. The result from this research shows that the CB solution had removed about more than 90% of heavy metals in aqueous solution which were Copper (Cu), Zinc (Zn) and Chromium (Cr) and about more than 60% for Cadmium (Cd). The percentage removal of Copper using CB solution as coagulant was 96.3% at pH 8.1. For Zinc, the percentage removal was 93.3% at pH 9.7. For Cadmium, the percentage removal was 60.4% at pH 9.18 and for Chromium, the percentage removal was 98.8% at pH 8.85. This shows that the CB solution had a potential to become the low cost coagulant that could be the alternative approach to remove heavy metals from aqueous solution.

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Water and environment - Environmental - Solid waste
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 07 Nov 2013 08:48
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/10235

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