Abstract:
The concentrations of sixteen compound of organochlorine pesticide (OCPs) were
measured in the surface sediment and Crassostrea sp. collected from the aquaculture
cage-culture area of the Setiu lagoon. The sampling was done two times in August
2007 during dry-season (Pre-monsoon) and beginning of the rainy season (monsoon)
at November 2007. Sediment and oyster, samples were extracted using solid-liquid
technique and pesticides determination using gas chromatography with electron
capture detector (GC-ECD). The concentration of OCPs in the sediment during first
Sruf1pling :md second sampling were ranged 0.003-39.71 ng g-
1
and 0.27-192.74 ng g-
1
respectively. Meanwhile, for the Crassostrea sp. the total range concentration during
first sampling was 0.03-434.33 ng g-
1
and for the second sampling was 0.001-28.80
ng g-
1
respectively. The OCPs compound fall into three major group mainly BHC,
Cyclodiene and DDT. Each g.0up i.iad a different concentration for every station. The
concentration of Cyclodiene group was higher compare to other groups. The
concentration of OCPs was significant in the sediment between the dry-season and
beginning at the rainy season (Anova (p<0.05)). As a conclusion, the concentration of
OCPs in sediments and Crassostrea sp. for the both sampling was in the lowest
concentration and not polluted.
