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 (399Kb)
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51,397,000 Yen (FY1994 10,881,000 Yen)
To clarify emission sources of marine pollutants and their behavior, fingure printing methods using lead isotope ratio or isomeric pattern of organochlorine compounds were developed. Lead concentration and isotope ratio were determined for coastal seawter samples and open ocean seawater samples, collected during the cruise of the Hakurei-Maru from August to September. Samples from Sendai Port, Chiba New Port, Tokyo Bay St. 22 and Tsushima Omodahama have different isotopic data compared with those for the open ocean seawater samples. It suggests that the lead in the coastal seawater samples has different origins and is thought to be influenced by industrial activities. Isomer specific analysis of PCN(polychlorinated naphthalene) was performed for several fly ash samples taken from incinerators and sediment samples in an industrial area to clarify the behavior of PCN. The isomer patterns turned out to be specific to each emission source. The major source of PCN in the industrial area was regarded to be technical products. The isomer patterns have changed from those of the sources because of biodegradation. The degradability seemed to be higher for the isomers such as 1, 4, 5-trichloro-naphthalene, 1, 4, 5, 8-and 1, 2, 4, 8,-tetrachloronaphthalene which had many peri- substituted Cl atoms compared with other isomers. Preconcentration method using XAD-2 resin was also developed for the trace levels of organotin compounds in seawater.
Marine pollution, Emission Source, Lead, Chlorinated Organic Compounds, Finger Print Method