Bottom sediments in a polluted marine environment,upper Saronikos Gulf,Greece |
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| Authors: | Gary B Griggs A P Grimanis Maria Vassilaki Grimani |
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| Institution: | (1) Division of Applied Sciences, University of California, 95064 Santa Cruz, CA;(2) Department of Chemistry, Demokritos Nuclear Research Center, Athens, Greece |
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| Abstract: | The domestic and industrial waste water from most of the greater Athens, Greece area is discharged into shallow water at the
upper end of the semi-enclosed Saronikos Gulf. The lack of circulation and excess organic matter has led to the formation
of a rapidly expanding sludge field. Black anoxic sediments high in organic carbon now cover almost 9 sq km of sea floor and
contain high concentrations of heavy metals. Maximum increases above background values range from 22× for mercury, 1500× for
arsenic, 1200× for chromium, to 3000× for zinc. The principal sources of metals are 1) a fertilizer factory, 2) the Athens
sewer outfall, and 3) the industries in eastern Elefsis Bay. |
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