ＰＣＢ処理促進によるリスク削減効果の検討

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書誌事項

タイトル別名
  • Comparative Risk Assessment for Storage and Destruction of PCB Waste.
  • PCB ショリ ソクシン ニ ヨル リスク サクゲン コウカ ノ ケントウ

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抄録

A comparative risk assessment for storage and destruction of PCB waste was performed. Intakes of Co-PCBs at the local (within 10 km from the destruction plant), national (Japan) and foreign (northern hemisphere excluding Japan) areas were considered. Based on a comparison between measured and estimated PCB concentrations in air and water, a previous estimate for PCB emission caused by the loss under the storage of PCB wastes was re-examined. As a result of the re-assessment, the new upper bound estimate for the PCB emission was the same as the previous estimate in case of soil, and 1/10 of the previous estimate in case of air or water. Estimated individual exposure (EIE) to Co-PCBs for the storage scenario was in the order of several pg-TEQ/person/day in Japan. In the destruction scenario, the EIE for the local area was in the range of 0.1-0. 7 pg-TEQ/person/day, which was 2-4 orders of magnitude higher than that for the national area. In both scenarios, the EIE for the foreign area was about 2 orders of magnitude lower than that for the national area. In terms of the estimated total exposure (ETE), which is defined as the product of EIE and the population, a significant contribution from the foreign area was calculated, while that from the local area was small. The difference in the spatial distributions of EIEs and ETEs revealed that it was important to consider both local and global effects in the PCB risk assessment.

収録刊行物

  • 環境化学

    環境化学 13 (1), 103-115, 2003

    一般社団法人 日本環境化学会

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