在谢尔德河口的雌激素污染的时间演变
Yu-Wei Jia1, Xiao Jian2, Wei Guo3
1Archaeology, Environmental Changes & Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels 1050, Belgium.
The Science of the total environment
|November 12, 2024
概括
在雪尔达河口测量了雌激素活性. 40年来,沉积物中的含量已经下降,但由于环境影响,持续监测至关重要.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 分析化学 分析化学
背景情况:
- 雌激素是雪尔达河口的重要污染物,源自人口密集和工业活动.
- 此前对这个河口的雌激素水平和趋势的研究是有限的.
研究的目的:
- 调查河河口的溶解,颗粒物和沉积物部分中雌激素活性 (EA) 的水平和演变.
- 为了评估雌激素在水和颗粒物之间的分离.
- 分析河口沉积物中EA的历史趋势.
主要方法:
- 使用了雌激素受体 (ER) - 化学活性露西法酶基因表达 (CALUX) 生物试验.
- 分析了来自谢尔德河口的近期和历史样本.
- 在溶解,颗粒物和沉积物阶段量化EA.
主要成果:
- 在EA的度有所不同:在溶液中7-168 pg的E2等价物/g,在颗粒中2.16-22.5 pg的E2等价物/g,在沉积物中1.8-38.2 pg的E2等价物/g.
- 颗粒物和溶解相之间的分离系数 (Kd) 约为2000 L/kg.
- 在过去的40年里,沉积物中的雌激素活性已经下降,在上游河口观察到的最显著的下降 (从112到28ppgE2等价物/g).
- 排放到北海的溶解雌激素和颗粒物质量负荷分别为7.5微克/秒和1.6微克/秒.
结论:
- 过去四十年来,斯凯尔特河口的雌激素水平显示了沉积物的下降趋势.
- 尽管下降,但由于雌激素对水生生物和人类健康的潜在环境影响,持续监测至关重要.
- 了解雌激素分区和负载对于管理河口污染至关重要.
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