Abstract
The accumulation of four heavy metals; zinc (Zn), chromium (Cr), cadmium (Cd), and lead (Pb) in sediment collected from 10 stations along the Gorgan coast, Caspian Sea (Iran) were studied. Gorgan coast receives effluent discharges from heavily industrialized and highly populated settlements. The sediment was sampled and analyzed for heavy metals by atomic absorption spectrophotometery. The results showed that Zn was the highest concentrated heavy metal in sampled sediments; Zn content in sediments sampled from Makhtoom Qoli station and Abu-Hanifa was 2871.9 and 2690.4 ppb. However, the observed heavy metal concentration in these sediments were below the recommended limits. The investigation showed that there are rising levels of heavy metals in the environment. Thus, monitoring of industrial and man-made pollution which may lead to ecosystem and food chain contamination is necessary.
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