进入过去:沉积物核心揭示了技术关键元素对海洋环境的人为影响
Dominik Wippermann1,2, Ole Klein1, Hendrik Wolschke3
1Institute of Coastal Environmental Chemistry, Inorganic Environmental Chemistry, Helmholtz-Zentrum Hereon, Max-Planck Str. 1, 21502, Geesthacht, Germany.
Archives of environmental contamination and toxicology
|January 17, 2025
概括
在波罗的海沉积物中,技术关键元素 (TCE) 和遗留污染物正在增加. 虽然遗留污染物显示出显著的丰富,但一些TCE如和也表明人为影响的增加,为环境监测建立了新的基线.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 海洋污染 海洋污染
背景情况:
- 技术关键元素 (TCE) 越来越多地用于各种应用,导致它们被引入诸如海洋生态系统之类的偏远环境.
- 波罗的海,水交换有限,特别容易受到污染.
- 评估TCE和遗留污染物的人类影响对于了解环境污染至关重要.
研究的目的:
- 分析波罗的海沉积物核心中的元素质量分数,以评估污染水平.
- 用既定的统计方法确定遗留污染物和TCE的背景度.
- 评估不同时期对波罗的海环境的人为影响.
主要方法:
- 使用-210 (Pb) 和-137 (Cs) 进行放射测年,以建立沉积物核心时间表.
- 使用中位数+2中位数绝对偏差 (M2MAD) 和Tukey内围 (TIF) 方法计算背景度.
- 对42个元素质量分数的分析,重点关注六种遗留污染物 (Ni, Cu, Zn, As, Cd, Pb) 和六种TCE (Ga, Ge, Nb, La, Gd, Ta).
主要成果:
- 丰富因子表明,在最近的时期,遗留污染物 (Ni,Cu,Zn,As,Cd,Pb) 的人为影响增加.
- 对 (Ga), (Ge) 和 (Nb) 观察到缩因子的轻微增加,这表明人类影响正在出现.
- 对铜 (Cu), (Zn), (Cd), (Pb) 和 (Ge) 证实了显著的人为影响 (富化因子≥1.5).
结论:
- 该研究确定了波罗的海沉积物中元素的拟议背景值,作为未来环境评估的基准.
- 遗留污染物和某些技术关键元素都显示出人类对波罗的海的投入的证据.
- 持续监测对于跟踪TCE在海洋生态系统中的环境命运和影响至关重要.
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