在水生环境中无意产生的持久有机污染物,这些污染物来自历史的-生产
Zichun Huang1, Chu Wang2, Guorui Liu1
1State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Institute of Environment and Health, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, 310024, China; College of Resource and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
历史上的-生产污染了Ya-Er湖的持久有机污染物. 沉积物,莲花和鱼类显示出高水平,饮食中的多甲 (PCN) 有潜在风险.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 环境科学 环境科学
背景情况:
- 历史上的-生产是已知的持久性有机污染物 (POP) 的来源.
- 中国的亚尔湖有着-污染的历史,需要进行环境评估.
- 了解污染物分布和生物积累对于对生态和人类健康的风险评估至关重要.
研究的目的:
- 系统地调查雅尔湖中多环芳 (PAHs),化/化-PAHs (Cl/Br-PAHs),多化纳夫他林 (PCN) 和六丁 (HCBD) 的分布.
- 评估沉积物,莲花 (Nelumbo nucifera) 和鱼类中的污染程度.
- 评估潜在的生物积累和食物链转移风险,并估计饮食暴露风险.
主要方法:
- 从Ya-Er湖收集了沉积物,莲花和鱼样.
- PAHs,Cl/Br-PAHs,PCN和HCBD的度使用已知的化学方法进行了分析.
- 进行了相关性分析以推断污染物来源,并估计了生物积累因子和每日摄入量.
主要成果:
- 填充沉积物中的污染物度明显高于新鲜湖泊沉积物.
- 检测到Cl-PAHs,Br-PAHs和PCNs,有证据表明它们是通过母PAHs的化形成的.
- 生物群,包括莲花和鱼类,显示出相当大的污染物负担,鱼类中的度更高,表明生物积累和潜在的生物放大.
结论:
- -污染导致Ya-Er湖的生态系统中存在大量的POP残留物.
- 莲花和鱼类中的生物积累突显了食物链转移的风险.
- 虽然一些污染物摄入带来了可以忽略不计的风险,但多甲 (PCN) 的饮食摄入可能会引起健康关注,需要持续监测.
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