持久性有机污染物的食物网特定的生物放大
Barry C Kelly1, Michael G Ikonomou, Joel D Blair
1School of Resource and Environmental Management, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada.
Science (New York, N.Y.)
|July 14, 2007
概括
一些具有中度脂肪溶解度和高醇-空气分割系数的化学物质可以在呼吸空气的动物中积聚,造成风险. 这些物质需要监管评估,以防止对生态系统和人类健康造成伤害.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 生态毒理学 生态毒理学
背景情况:
- 生物累积物质对环境和人类健康构成风险.
- 监管机构将生物积累性物质定义为高醇-水分区系数 (K(OW) ≥100,000).
研究的目的:
- 为了确定以前未知的生物积累性物质的类别.
- 研究具有中等疏水性和高醇-空气分离系数 (K(OA)) 的化学品的生物放大潜力.
主要方法:
- 分析化学特性,特别是醇-水 (K(OW)) 和醇-空气 (K(OA)) 分割系数.
- 在含有呼吸空气的生物体的食物网中评估生物放大.
主要成果:
- 在呼吸空气的动物中,K ((OW) 含量在100至10万之间,代谢不良的物质可以显著地生物放大.
- 这种生物放大是由于高的K ((OA) 和低的呼吸道排泄率造成的.
- 这些化学品占商业有机化学品的三分之一,以前没有被确定为生物积累性.
结论:
- 一个新的潜在生物累积物质类别 (低K{\displaystyle K} ,OW{\displaystyle O} ,高K{\displaystyle K} ,OA{\displaystyle O}) 已被确定.
- 这些物质对生态系统和人类健康构成风险.
- 需要对这些化学品进行监管评估,以防止不良后果.
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