The Malaysian Journal of Analytical Sciences Vol 12 No 1 (2008): 172 – 178

 

 

KANDUNGAN LOGAM BERAT DAN RADIONUKLID TABII DALAM IKAN, AIR, TUMBUHAN DAN SEDIMEN DI BEKAS TASIK LOMBONG

 

Muhamad Samudi Yasir, Norlaili bt Ahmad Kabir, Redzuwan Yahaya & Amran Ab Majid

 

Pusat Pengajian Fizik Gunaan, Fakulti Sains dan Teknologi,

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor.

 

Abstract

Malaysia aggressively reclaimed most of their disused tin-mining pool especially for agricultural activities, freshwater fish farming  area,  recreational  area,  houses  area  and  even  as  an  industrial  area.  Past  mining  activities  might  induced  the concentration of naturally occurring radionuclide (NORM) and heavy metal at the disused tin-mining pool  ecosystem. A study has been conducted on the status of heavy metal (Hf, Zr, Mn, Cu, Zn, As, Cd, Sn, Sb, Ba, Hg and Pb) concentration and naturally occurring radionuclide activity in fish, water, plants and sediments at three different disused tin-mining pool near by Sepang and Puchong, Selangor Darul Ehsan. Sample of fish, water, plant and sediment being analyze using ICP-MS. The concentrations of heavy metal in sediment and plant are higher than its concentrations in fish and followed by water. The highest concentration of heavy metal in sediment and water is barium, whereas the highest concentration of heavy metal in fish and plant is zinc and manganese. The result also showed that only mercury level in fish collected in second disused tin- mining pool (0.53 ± 0.20 mg/kg) is exceed the maximum limit (0.5 mg/kg) prescribe by the Malaysian Food Act (Act 281). The activity of U-238 and Th-232 in sediment was found to be relatively higher than its activity in fish, plant or water (30.76 ± 2.71 – 35.34 ± 0.27 Bq/kg) and (9.37 ± 2.30 - 18.86 ± 2.60 Bq/kg). The determination of K-40 activity showed that it is highly contained in plant and fish than in sediment or water.

 

Key words: Heavy metal, natural radiobuclides, ex-mining lake, fish, sedimen

 

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