Geolipid hydrocarbons in surface sediment from Sarawak river estuary

Mohd Saiful, Hazri Mat Yusof (2006) Geolipid hydrocarbons in surface sediment from Sarawak river estuary. [Final Year Project Report / IMRAD] (Unpublished)

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Abstract

The Surface sediments collected from twelve sampling sites located at the estuarine area from Sarawak River. The Samples were analyzed for aliphatic hydrocarbons and polycyclic aromatic hydrocarbons (PAHs) content by using high resolution capillary gas chromatography/flame ionization detector (GC/FID). The concentration of tota1 aliphatic hydrocarbons (TAHs) and PAHs are in the range 3.3 ug/g to 10.8 ug/g (dry-weight) and 1.7 ug/g to 11.0 ug/g (dry weight), respectively. The carbon preference index (CPI) together with other hydrocarbon biomarker indices showed that sediments located at the estuary of Sarawak River and near to the coastal area were affected by high level of biogenic input. The sediments of estuary which contributed directly from Kuching City were considered to receive a mixture of both anthropogenic and biogenic inputs. Q-mode cluster analysis was performed to classify the sampling sites into groups according to their probable input sources. This results of this analysis showed that sediments located at the estuary and near to the coaSta1 area were affected by high level of biogenic input. Combinations of both anthropogenic and biogenic input were Observed for the sediments located at the estuary zone which contributed directly from Kuching City. The distribution pattern of hydrocarbons in the sediments for this area is similar to distribution of hydrocarbons in petroleum product, organic matter and input from atmosphere.

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