由棕藻捕获的天然返回东北大西洋
Carme Pacín1, Jesús R Aboal2, J Ángel Fernández2
1CRETUS Center, Department of Functional Biology, Ecology Unit, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain; CIQUS Center, Department of Physical Chemistry, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain.
Journal of hazardous materials
|July 27, 2025
概括
东北大西洋的 (Pb) 污染表明,尽管度稳定,但从人类来源转向自然来源. 同位素分析显示人为Pb的减少,突出了有效的法规,但也增加了自然贡献.
科学领域:
- 环境化学环境化学
- 海洋生态海洋生态学
- 同位素地球化学 同位素地球化学
背景情况:
- (Pb) 是一种持久性和有毒的污染物,具有重大生态影响.
- 了解海洋生态系统中Pb污染的长期趋势和来源对于有效的环境管理至关重要.
- 棕色藻类 (Fucus spp.) 是一种 作为沿海污染监测的有价值的生物指标.
研究的目的:
- 调查Fucus spp.中的Pb度和同位素特征的30年趋势 (1990-2021年). 来自东北大西洋.
- 用同位素分析和贝叶斯混合模型识别和量化Pb污染的来源.
- 评估环境法规的有效性和全球变化对Pb生物可用性的影响.
主要方法:
- 在446 Fucus spp.中分析Pb度和同位素比率 (Pb,Pb,Pb) 在446 Fucus spp.中. 这些样本是在1990年至2021年期间采集的.
- 贝叶斯混合模型 (MixSIAR) 的应用用于Pb的来源分配.
- 同位素趋势与煤炭燃烧和汽油来源的历史排放数据的比较.
主要成果:
- 的度在30年内出现了21.9%的适度,不显著的下降.
- 同位素数据显示,从人为Pb来源到自然Pb来源的显著转变,自然贡献从4.7%增加到61.5%.
- 观察到沉积物衍生的Pb (189.3%) 的大幅增加,以及由于海洋酸化而提高的生物可用性.
结论:
- 同位素分析对于准确的Pb来源归因至关重要,它揭示了仅仅通过度数据掩盖的趋势.
- 监管措施,如逐步淘汰含汽油,已经有效地减少人为Pb投入.
- 由于环境变化而增加Pb的生物可用性是一个挑战,可能会抵消减少排放的好处,并需要持续监测.
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