宍道湖における水鳥,魚類及び二枚貝類中のダイオキシン類の異性体組成について  [in Japanese] Isomer Compositions of PCDDs/DFs and Coplanar PCBs in Waterfowls, Fishes and Shellfish from Lake Shinji  [in Japanese]

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Author(s)

    • 益永 茂樹 [他] Masunaga Shigeki
    • 横浜国立大学環境科学研究センター環境基礎工学研究室 Institute of Environmental Science & Technology, Yokohama National University
    • 中西 準子 Nakanishi Junko
    • 横浜国立大学環境科学研究センター環境危機管理学研究室 Institute of Environmental Science & Technology, Yokohama National University

Abstract

Polychlorinated dibenzo-p-dioxinslfurans (PCDDs/DFs) and dioxin like PCBs (coplanarPCBs ; IUPAC NO. #81, #77, #126 and #169) were determined in waterfowls (common cormorants and tufted ducks), and their preys (fishes and shijimi clams) from Lake Shinji food web. PCDDs/DFs and coplanar PCBs were detected in all the biological samples. The mean concentrations on dry weight basis of total PCDDs/DFs determined from the various species were 21 pg/g for goby, 36pg/g (range ; 15-72pg/g) for sea bass, 53 pg/g (40-66 pglg) for gizzard shad, 59 pg/g for large-eyed herring, 76 pg/g (24-147 pg/g) for common cormorant, 144 pg/g (83-204 pglg) for tufted duck and 526 pg/g (313-767 pg/g) for shijimi clam, respectively. On the other hand, the total coplanar PCBs concentration varied between the various species from a mean low value of 56 pg/g (41-75 pg/g) in shijimi clam to a mean high value of 589 pg/g (323-1020 pg/g) in common cormorant. The proportion of coplanar PCBs-TEQ to the total TEQ (Σ PCDDs + Σ PCDFs + Σ Coplanar PCBs) concentrations in all biological samples was about 60%. The distribution profiles of PCDDs/DFs isomers in common cormorants and other biological samples from Lake Shinji were considerably different. Namely, toxic 2,3,7,8-chlorine substituted compounds in common cormorants were more predominant than those in the other samples. The sum of 1,3,6,8 and 1,3,7,9-TeCDD concentrations in tufted ducks, some fish samples and shijimi clams are greatly contributed to the total PCDDs/DFs concentrations. The occurrence of these isomers in biological samples suggests that environmental media in Lake Shinji had been affected by CNP used in the past.

Journal

  • Bulletin, Institute of Environmental Science and Technology, Yokohama National University

    Bulletin, Institute of Environmental Science and Technology, Yokohama National University 26(1), 11-22, 2000

    Yokohama National University

Cited by:  1

Codes

  • NII Article ID (NAID)
    110000360647
  • NII NACSIS-CAT ID (NCID)
    AN00246482
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • Journal Type
    大学紀要
  • ISSN
    0286584X
  • NDL Article ID
    5360833
  • NDL Source Classification
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL Call No.
    Z16-902
  • Data Source
    CJPref  NDL  NII-ELS  IR 
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