Geochemical Composition of Beach Sediment in Langkawi Island, Kedah, Malaysia
Wan Mohd Razi Idris, and Sahibin Abdul Rahim, and Zulfahmi Ali Rahman, and Tukimat Lihan, and Azman Hashim, and Shahril Nizam Mohd Yusuf, (2009) Geochemical Composition of Beach Sediment in Langkawi Island, Kedah, Malaysia. Sains Malaysiana , 38 (3). pp. 313-320. ISSN 01266039 Official URL: http://pkukmweb.ukm.my/~jsm/pdf_files/SM-PDF-38-3-2009/04%20Wan%20Mohd%20Razi.pdf AffiliationsUniversiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Environment and Natural Resources Sciences Universiti Kebangsaan Malaysia. Faculty of Science and Technology. School of Environment and Natural Resources Sciences Universiti Kebangsaan Malaysia. Faculty of Science and Technology. School of Environment and Natural Resources Sciences Universiti Kebangsaan Malaysia. Faculty of Science and Technology. School of Environment and Natural Resources Sciences Universiti Kebangsaan Malaysia. Faculty of Science and Technology. School of Environment and Natural Resources Sciences Universiti Kebangsaan Malaysia. Faculty of Science and Technology. School of Environmental Science Studies and Natural Resources AbstractA total of 40 surface sediment samples collected from Pulau Langkawi namely Pulau Daya Bunting, Pulau Tuba and Selat Kuah were analyzed to determine the heavy metal content such as Co, Pb, Ni, Cr, Zn and Cu. Sediment parameters such as pH, organic matter content and particle size distribution usually considered influential in heavy metal enrichment were also determined. The abundance of heavy metals Co, Pb, Ni, Cr, Zn and Cu in sediment samples ranged at 13-75 μgg-1, 9-113 μgg-1, 3-57 μgg-1, 2-26 μgg-1, 8-69 μgg-1 and 2-14 μgg-1, respectively. The values of pH and organic matter content ranged at 3.95-8.39 and 0.06-15.01%, respectively, whilst the particle size distribution was dominated by sand with values of more 70%. Correlation analysis showed that the organic matter content and the presence of silt and clay minerals controlled the abundance of heavy metal in the sediment, whereas heavy metal content had a significant positive correlation at above 1% level with all elements. The Co and Pb heavy metal concentrations were above the critical level where potential toxicity in soil and sediment may occur. This could be attributed to input of effluent from development activity in the inland or from the sea. Repository Staff Only: item control page
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