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Study of Chitosan Extraction from Insects to Remove Metal Ions In Waste Water

Wan Ab Rahim, Rafsyam Wan (2004) Study of Chitosan Extraction from Insects to Remove Metal Ions In Waste Water. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Chitosan is a derivative ofchitin and has numerous applications ranging from cosmetics to substrate material for membranes. This project is aimed to investigate the feasibility of producing a derived chitosan from insects by chemical extraction methods available in the chemical laboratory. Other objective is to use the chitosan in the waste water to remove the heavy metals ion. Common cockroaches (Homasilpha vicinia) are the specimen used in the experiment for chitin extraction. The production ofchitosan involves few method ofextraction namely demineralization, deproteination, deacetylation, and acid extraction of chitin. Demineralization is the removal of minerals, primarily calcium carbonate (CaC03). Deproteination was conducted using diluted sodium hydroxide (NaOH) as treatments. Deacetylation then was done to obtain the chitosan using theconcentrated NaOH andacetic acid. As the chelating agent, for heavy metal ions oflead (Pb2+), nickel (Ni2+), copper (Cu2_f) and zinc (Zn2+), chitosan can remove 95% and above of the heavy metal ions from the 50 ppm solution. Chitosan shows better result if compared to the chitin. At 50 ppm concentration solution, reduction oflead ions (Pb2+) was at 100% with 0.20 gchitosan, 99.93% for nickel ions (Ni2+) with 0.25 gchitosan, 97.30% for copper ions (Cu2+) with 0.10 gchitosan and 97.62% for zinc ions (Zn2+) with 0.25 g chitosan.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Environment
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:55
Last Modified: 25 Jan 2017 09:47
URI: http://utpedia.utp.edu.my/id/eprint/7958

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