2.1. Sediment Sampling
Surface sediments were collected from 52
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Figure 1. Map of study area and sampling stations. Details of sampling sites are given in text.
stations along the Eastern Coast of the Gulf of
Thailand. The sampling stations were divided into 4
zones: A, C, E and G , emphasizing on industrial
and aquacultural areas (Fig. 1). At each station,
composite sediments of 3 subsamples were collected
in March 2004 using a modified Peterson
grab. The samples were freeze-dried, manually
sieved through a 2-mm mesh size nylon sieve and
then homogenized using agate mortar and pestle.
Duplicate subsamples of each composite sediment
were taken for metal analysis and sediment characterization.