Assessment of organ chlorine contaminants in Shadegan wetland using (Barbus grypus) as a biological index

One of the dangerous contaminants that enter to the Shadegan wetland is Persistent Organic Pollutants. Lipophilic and high persistency of these contaminants laid to, accumulation across the food chain. Fish is main route for entrance of these compounds to human bodies. Approximately 90% intake of these compounds in human bodies is from marine food. Main route for entrance of these contaminants is fish and diets that contain much amount of fish, laid to high intake of these contaminates and it is dangerous for alimentary health of resident     In this research levels of poly chlorinated biphenyls and some pesticides containing DDTs, HCHs and HCB in Barbusgrypus that gathered in autumn 1386 form Shadegan wetland, were analyzed by Gas Chromatography (GC). Results show that concentration of PCBs, DDTs, HCHs and HCB were 6.38, 11.41, 4.03 and 0.19 ng g-1 respectively. Study of various pollutant metabolites show that among PCB congeners PCB-28 (4.68 ng g-1), among DDTs metabolites p,p < sup>/-DDE (8.15 ng g-1) and among HCHs isomers α-HCH (3.14 ng g-1) had the most concentrations. High concentration of p,p < sup>/-DDE in fish suggests that recently DDT pesticides have not been used in agriculture after their ban and High concentration of α-HCH suggests new input of HCH (Especially technical HCHs) into soil and water around this area. Concentrations of pollutants in sample were below than represented standards by various organizations.