| 典型电子垃圾拆解区居民多卤代芳烃的膳食暴露及其癌症风险评估 |
| 摘要点击 1359 全文点击 1499 投稿时间：2008-09-17 修订日期：2008-10-28 |
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| 中文关键词 电子垃圾 多卤代芳烃 膳食暴露 癌症风险 |
| 英文关键词 e-waste polyhalogenated aromatic hydrocarbons dietary intake cancer risk |
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| 中文摘要 |
| 收集浙江典型电子垃圾拆解区和对照区的饮用水、蔬菜、豆类、米饭、鸡蛋、鱼、鸡肉和猪肉等8类食物样品共191个；采用GC/MS 5975B分析样品中23种PBBs，12种PBDEs和27种PCBs；评估当地居民的PHAHs膳食暴露现状及其癌症风险.结果表明，拆解区居民这三大类PHAHs的平均日摄入量是对照区的2～3倍，通过米饭摄入PHAHs的量占当地居民PHAHs总摄入量的48％以上.拆解区居民因食物摄入PHAHs的癌症风险(3.81×10-4)是对照区(1.50×10-4)的2倍多，其中二英类PCBs的风险值占总癌症风险的45％以上.通过米饭摄入PHAHs是主要的暴露途径，二英类PCBs是引起癌症风险的主要贡献因子，电子垃圾拆解释放出的PHAHs通过食物摄入进入居民体内引起的癌症风险要明显高于对照区. |
| 英文摘要 |
| This study was conducted to estimate the lifetime average daily dose (LADDs) and the cumulative cancer risk of PBBs, PBDEs, and PCBs for local residents living in four e-waste disassembly sites and a control site in the Zhejiang Province of China. A total of 191 food samples (including seven food groups and drinking water) were obtained, and the concentrations of the three PHAHs were measured by GC/MS 5975B. The estimated LADDs of PHAHs in the disassembly sites were approximately 2-3 times higher than those in the control site. Among different food groups, LADDs of the three PHAHs through rice consumption accounted for more than 48% of the total cumulative dose. The estimated cumulative cancer risk was 3.81×10-4 for residents living in the disassembly sites, which was about two fold higher than those for the people living in the control site (1.50×10-4). The results showed that rice consumption was the principal exposure pathway for the intakes of PHAHs, dioxin-like PCBs were the major contributors for the cumulative cancer risks, which accounts for 45% of the total cancer risks. |
