世界水域的被动采样器衍生的PCB和OCP度――AQUA-GAPS/MONET网络的第一个结果
Rainer Lohmann1, Branislav Vrana2, Derek Muir3
1Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882-1197, United States.
Environmental science & technology
|June 9, 2023
概括
通过被动采样,有效地监测全球水产污染. 像HCHs这样的持久性有机污染物 (POPs) 在北极地区很高,而PCB显示全球运输有限,与人口密度相关.
科学领域:
- 环境化学环境化学
- 全球污染监测全球污染监测
- 水生毒理学 水生毒理学
背景情况:
- 持久性有机污染物 (POP) 是全球污染物,但由于采样挑战,人们对它们的水生趋势知之甚少.
- 被动采样为各种水体的时间加权平均POP度测量提供了可行的解决方案.
- 在AQUA-GAPS/MONET项目中,使用被动采样来评估全球淡水和海洋环境中的POP.
研究的目的:
- 调查水生系统中遗留的POPs的全球分布和空间模式.
- 评估被动采样器在各种环境中监测POPs的有效性.
- 确定 POP 度与人口密度等人为因素之间的潜在相关性.
主要方法:
- 在2016年至2020年期间,在全球分布的40个地点 (淡水和海洋) 部署被动采样器.
- 对关键遗留POPs的分析,包括六环素 (HCHs),五二 (PeCB),六二 (HCB) 和多二 (PCB).
- 统计分析以将 POP 度与地理位置和人口密度相关联.
主要成果:
- 阿尔法-HCH和马-HCH度在北度/北冰洋最高.
- 五和六二在所有采样地点都接近平衡,这表明其持久性很高.
- 聚化双的度与生产/使用估计相关,这表明远程运输有限.
- 在几个POP组 (PCB,DDT,内硫,) 和当地人口密度之间发现了显著的正相关性.
结论:
- 被动采样器是评估全球POP分布在水生环境中的有效工具.
- 地理空间模式表明不同POP的运输机制各不相同,其中一些显示全球移动有限.
- 人口密度是影响当地POP度的重要因素,突出显示了人类活动的影响.
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