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Heavy Metals in bark as an indicator of atmospheric deposition near ex-tin mines in Perak

Kusmaniirat, Norizaidah (2010) Heavy Metals in bark as an indicator of atmospheric deposition near ex-tin mines in Perak. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Malaysia has long been recognized as one of the world's leading tin producers in 1960's. However, over the last 15 years, the tin industry collapsed due to exhaustion of tin deposits, low tin prices and high operating costs. Generally, the former tin mines are used for housing development, agriculture and recreational purpose. However, most former mines are used for crop production. These crops can cause the heavy metal to enter the food chain. Studies have shown that crops grown on these former mining sites have high levels of arsenic, mercury, cadmium and lead. Heavy metals release will cause harmful impact to the environment especially to the human health. There are three types of heavy metals pathway from mine site released to the surrounding. The pathways are from soil, river and atmospheric deposition. The scope of study is atmospheric deposition near tin mines. Tree barks from different trees will be used as a bio-monitoring indicator. Tree barks have been used successfully to monitor the levels of atmospheric metal deposition in many areas, but rarely in Malaysia. The objective of study aims to determine the heavy metals contain in tree barks as an indicator of atmospheric deposition near several ex-tin mine at Perak in relation to mine activity and also in relation to height of barks. Barks are taken from three ex-tin mines site at Tronoh, UTP and Malim Nawar. Samples are extracted using a stainless steel knife at an average size of 15 em x 15 em at different tree height from ex-tin mines. The samples then were analyzed for Lead (Pb) and Zinc (Zn) using atomic absorption spectrometry (AAS). Results showed that the concentrations of heavy metals in barks are range between 13.49 mg/kg to 49.35 mg/kg for Ph and 9.46 mg/kg to 46.12 mg/kg for Zn. It is found that there are an inverse relation between height and concentration, where with increased height of barks, the concentration of heavy metals decreased. It was concluded that there still have a dispersal of heavy metal from ex-tin mine even it was a non-active site.

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: 29 Oct 2013 10:52
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/10076

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