Trace metals in selected corals of Malaysia
2002
Mokhtar, M.B. (Kebangsaan Univ. (Malaysia). Inst. for Environment and Development) | Wood, A.K.B. | Hou-Weng, C. | Ling, T.M. | Sinniah, A.A.
The present study was carried out to determine the concentration of mercury, manganese, zinc and chromium in coral samples from shorelines of Tioman and Labuan Island, Teluk Sepangar and Tanjung Aru using neutron activation analysis (NAA). The coral heads of Porites sp. and Favia sp. were examined. The result indicated that the average chromium concentrations in Porites sp. from Tioman was 0.61 plus minus 0.29 mug g-1, Teluk Sepangar 3.40 plus minus 1.54 mug g-1, whilst Tanjung Aru and Labuan were below detection level (less than 0.01 mug g-1). Average chromium concentrations in Favia sp. from Tioman was 2.98 plus minus 0.69 mug g-1, whilst Tanjung Aru and Labuan were below detection limit (less than 0.01 mug g-1). Average zinc concentrations in Porites sp. from Tioman was 0.84 plus minus 0.18 mug g-1, Tanjung Aru (26.02 plus minus 8.57 mug g-1), Teluk Sepangar (8.20 plus minus 2.37 mug g-1) and Labuan (0.16 plus minus 0.13 mug g-1). Average zinc concentrations in Favia sp. from Tioman was 2.69 plus minus 0.39 mug g- 1, whilst Tanjung Aru and Labuan Island were below detection limit (less than 0.01 mug g-1). Concentrations of manganese in Favia and Porites sp. collected from waters off Tioman and Labuan islands were significantly different (P less than 0.05) from each other and similar trends were observed for concentrations of mercury in Favia and Porites sp. from waters off Tioman Island. Concentrations of mercury in coral samples from Labuan were below the detection limit of 0.01 mug g-1.
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