| 电子废弃物处理地室内外灰尘中多溴联苯醚的污染及其人群暴露水平 |
| 摘要点击 2509 全文点击 1553 投稿时间：2009-03-04 修订日期：2009-04-15 |
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| 中文关键词 多溴联苯醚(PBDEs) 灰尘 电子废弃物 暴露 室内外 |
| 英文关键词 polybrominated diphenyl ethers(PBDEs) dust E-waste exposure indoor and outdoor |
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| 中文摘要 |
| 2006年10月和2007年10月,在广东省清远市一个典型电子废弃物处理地采集了24个室内和15个室外灰尘样品,分析了其中的17种多溴联苯醚(PBDEs).结果显示, PBDEs在所有灰尘样品中均有检出,室内灰尘中PBDEs含量为230～157 500 ng·g-1,平均9?400 ng·g-1；室外灰尘中PBDEs含量为212～25 880 ng·g-1,平均3 311 ng·g-1.与世界其他地区灰尘中PBDEs的含量相比,本研究地区灰尘中PBDEs的含量处在较高水平.BDE209是灰尘中最重要的同族体；与工业品中PBDEs的组成对比显示,灰尘中相对高丰度的八至九溴同族体可能来自BDE209的降解.婴幼儿、儿童和成人通过灰尘对PBDEs的平均日暴露量分别为470、329和188 ng·d-1,婴幼儿和儿童的最高日暴露量(31 500和19 700 ng·d-1)分别是成人的4和2.5倍.灰尘可能是当地人群(特别是婴幼儿和儿童)暴露PBDEs的重要途径. |
| 英文摘要 |
| Twenty-four indoor and fifteen outdoor dust samples were collected from an electronic waste (e-waste) area, South China in October 2006 and October 2007 and analyzed for seventeen PBDE congeners. PBDEs were detected in all dust samples. The total PBDE concentrations for indoor dusts ranged from 230-157 500 ng/g, with a mean value of 9 400 ng/g, and 212-25 880 ng/g, with a mean value of 3 311 ng/g for outdoor samples, respectively. The PBDE concentrations in the present study were at the high end of the worldwide figures. BDE209 was the predominant congener. Comparison of the PBDE congener patterns in dusts and technical products suggests that the relatively high abundances of octa- to nona-PBDE congeners in the dusts might be originated from the degradation of BDE209.The average exposure estimates of PBDEs via dusts are 470, 329 and 188 ng/d for infants, toddlers and adults, respectively. The highest exposure estimates for infants and toddlers (31 500 and 19 700 ng/d) were 4 and 2.5 fold higher than those for adults. These results indicate that dust may be a very important route of exposure for PBDEs in local residents. |
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