Sains Malaysiana 37(4): 337-340(2008)

Distribution of Some Geochemical Elements in the Surface Sediment of Kerteh Mangrove Forest, Terengganu, Malaysia

(Taburan Beberapa Elemen Geokimia dalam Sedimen Permukaan

di Hutan Paya Bakau Kerteh, Terengganu, Malaysia)

Kamaruzzaman Yunus &  Ong Meng Chuan

Institute of Oceanography and Maritime Studies

International Islamic University Malaysia

Bandar Indera Mahkota, 25200 Kuantan

Pahang Malaysia

Received:  18 January 2008 / Accepted:  19 March 2008

ABSTRACT

Surface sediments collected from two transects (30 sampling points) in the Kerteh mangrove forest had been analyzed for Co, Cu, Pb, Zn and Cr concentrations with the Inductively Coupled Plasma-Mass Spectrometry (ICP-MS).  The average concentration of Co was 8.91±1.89 µg/g dry weight, Cu was 29.0±12.8 µg/g dry weight, Pb was 11.7±6.85 µg/g dry weight, Zn was 22.3±13.7 µg/g dry weight and Cr  was 13.2±9.07 µg/g dry weight.  Their concentrations are significantly higher near the front mangrove and decline as the sampling points of each transect near the back mangrove area.  The calculated enrichment factors (EF) obtained for Zn and Cr can be considered to have the terigeneous in sources while Co, Cu and Pb, which had slightly higher value, were probably influenced by anthropogenic input. 

Keywords : Enrichment factor; mangrove forest; surface sediment

Abstrak

Sedimen permukaan yang dikutip dari dua transet (30 sampel permukaan) di kawasan hutan paya bakau Kerteh telah diukur bagi logam Co, Cu, Pb, Zn dan Cr dengan menggunakan peralatan Inductively Coupled Plasma-Mass Spectrometry (ICP-MS).  Purata kepekatan Co adalah 8.91±1.89 µg/g berat kering, Cu adalah 29.0±12.8 µg/g berat kering, Pb  adalah 11.7±6.85 µg/g berat kering, Zn  adalah 22.3±13.7 µg/g berat kering dan Cr  adalah 13.2±9.07 µg/g berat kering.  Secara signifikannya, kepekatan kesemua logam adalah tinggi di kawasan hadapan hutan paya bakau dan menjadi berkurangan pada transek di kawasan belakang hutan paya bakau.  Faktor pengkayaan (EF) yang dikira bagi Zn dan Cr adalah didapati menghampiri 1 dan boleh dianggap terhasil daripada sumber semulajadi, manakala Co, Cu dan Pb mempunyai nilai EF yang lebih tinggi memberikan gambaran bahawa sumber Mn mempunyai sedikit pengaruh daripada antropogenik.

Kata kunci:  Faktor pengkayaan; hutan paya bakau; sedimen permukaan

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