Abstract
The Patagonian coastal area of Argentina is nearly 3000 km long. It is a growing, developing region and is a highly biologically productive ecosystem. Human population is distributed among 13 towns, ranging from less than 1,000 inhabitants in Bahia Camarones to nearly 126,000 in Comodoro Rivadavia. The main pollution problems are related to sewage effluents with deficient or without treatment, agricultural runoff from the Negro and Colorado rivers, petroleum extraction and transportation and heavy metals wastes located near ports. Previous studies of metal concentrations in Patagonian marine sediments are scarce and restricted to Nuevo and San Jose Gulfs (Harvey and Gil 1968).The aim of the present work, is to determine the content of total mercury and 0.5 N HCI leachable zinc, copper, lead and cadmium in intertidal surface sediments from 17 stations along Patagonian coast, between Colorado and Gallegos rivers.
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