ベトナム E-waste 処理地域における臭素系難燃剤およびダイオキシン類縁化合物の人体汚染と曝露実態 Status of Human Contamination and Exposure to Brominated Flame Retardants and Dioxin-related Compounds in E-waste Recycling Sites in Vietnam

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ベトナム北部のE-waste処理地域等から採取したヒト母乳・ダスト・大気試料を対象に,ポリ臭素化ジフェニルエーテル (PBDEs) 等の臭素系難燃剤やポリ塩素化ビフェニールを測定し,その曝露実態を評価した。ダスト試料に関しては<i>in vitro</i>バイオアッセイによるダイオキシン様活性の測定や関連物質の分析を実施した。E-waste処理地域の住民や処理作業従事者の母乳からは,高濃度のPBDEsが検出された。母乳中PBDEs濃度はE-waste処理作業の従事年数に伴って増加する傾向が認められた。臭素系難燃剤の1日あたり取込量を推計したところ,E-waste処理地域では都市域よりも明らかにPBDEsの取込量が多く,特に小児の取込量は成人の約2倍に達することが示された。E-waste処理地域のダスト試料では高いダイオキシン様活性が認められ,臭素化ジベンゾフランや未知のAhRアゴニストの活性寄与が示唆された。

To assess the status of human contamination and exposure to brominated flame retardants such as polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls in Vietnamese E-waste recycling sites, human breast milk, dust and air samples were collected and employed for chemical analysis. Total dioxin-like activities and dioxin-related compounds in dust samples were measured by <i>iin vitro</i> bioassay and chemical analysis, respectively. In human breast milk samples, significantly higher concentrations of PBDEs were found in E-waste recycling sites than those found at the urban site. A specific accumulation of PBDEs on occupational exposure was observed in workers who are involved in E-waste recycling. We estimated the daily intake of contaminants and found high intakes of PBDEs in people living in and around the E-waste recycling sites. In particular, the values for children were about two times higher than that of adults. In the dust samples, higher dioxin-like activities were observed in E-waste recycling sites than at the urban site. In addition, polybrominated dibenzofurans were detected at higher concentrations in the dust from E-waste recycling sites and showed a significant contribution to total dioxin-like activities. On the other hand, the percentage of dioxin-like activities by unknown compounds was high in the dust samples, indicating significant contributions from unidentified AhR agonists.

収録刊行物

  • 廃棄物資源循環学会誌 = Material cycles and waste management research

    廃棄物資源循環学会誌 = Material cycles and waste management research 22(2), 169-179, 2011-03-31

    Japan Society of Material Cycles and Waste Management

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各種コード

  • NII論文ID(NAID)
    10029132734
  • NII書誌ID(NCID)
    AA12383900
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    18835864
  • NDL 記事登録ID
    11078825
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-2213
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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