PCB and HCB in the sediments and waters of the Tiber estuary |
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| Authors: | G Puccetti V Leoni |
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| Institution: | Institute of Hygiene “G. Sanarelli”, University of Rome, 00185 Citta Universitaria, Rome, Italy |
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| Abstract: | The contamination by polychlorinated biphenyls (PCB) and hexachlorobenzene (HCB) in sea waters and sediments of Tiber River estuary has been studied in 1976 and 1977.PCBs have been detected in all the samples analysed at mean levels of 0.297 ppb (1976) and 0.135 ppb (1977); these levels are much higher than those proposed as acceptable for surface waters. Contamination increases with increasing distance from the shore.HCB has been identified in only 16% of the water samples analysed and it was found absent in sediment samples.The results are discussed relative to both the levels of PCB in other sea waters and the toxicity of these products to the aquatic animals. |
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