| Summary: | 碩士 === 國立臺灣海洋大學 === 海洋環境化學與生態研究所 === 97 === Persistent organic pollutants (POPs, e.g. polychlorinated biphenyls and pesticides) can seriously affect human health and environmental quality. Asian countries have largely used POPs in industry and agriculture. Recent research has show that POPs may be transported to marginal seas (e.g. East China Sea and South China Sea) via long-term atmospheric transport. To investigate possible transport routes of organic pollutants to marine food chain, this study measured concentrations of POPs in planktons(>200 μm) in the East China sea(ECS) and adjacent coastal areas of Taiwan, as well as in aerosol samples from northern Taiwan. The major compounds measured in planktons in East China Sea were DDTs, Endrin, Dieldrin, PCB-18 and 110. Total concentrations of pesticides and PCBs from the inner shelf to outer shelf ranged from 562 to 939 ng/g, and 0.7 to 13.6 ng/g, respectively. Distribution of these POPs was likely influenced by water masses in the ECS.
In the coast waters around Taiwan, the majority of POPs in planktons of Taiwan were Endrin, Aldrin, PCB 44. In the summer, total concentrations of pesticides were 530 ng/g, which is significantly higher than that in the winter (34 to 200 ng/g). Same as PCBs, total concentrations of PCBs in summer (11.6 ng/g) seemed higher than that in winter (0.7~3.5 ng/g). Total concentrations of pesticides in aerosol samples ranged from 2 to 80 pg/m3 with higher values in summer (June to October) and lower values in winter (January to April). Possible causes for this enrichment include stronger Aeolian transport in the summer, or differences in primary productivity.
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