沉积物中反同位素的组成和差异受到世界上最大的反沉积区影响
Huiji Liu1, Guangyi Sun2, Mengchang He1
1State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
Water research
|March 11, 2024
概括
(Sb) 的同位素指纹显示了齐江河流域沉积物中明显的区域差异,主要与人为来源有关. 这种方法在追踪反来源和环境过程方面表现有前途.
科学领域:
- 环境地质化学环境地质化学
- 同位素地质化学 同位素地质化学
- 分析化学是一种分析化学.
背景情况:
- 反 (Sb) 同位素指纹是稳定金属同位素分析的新兴技术.
- 它的应用,特别是在沉积物研究中,仍然有限.
- 由于其对环境的影响,了解水生系统中的Sb来源和行为至关重要.
研究的目的:
- 为了研究的同位素组成和缩在江 (ZR) 流域的沉积物中,这是一个主要的矿化带.
- 评估Sb同位素指纹的适用性,用于追踪矿山受影响环境中的Sb来源.
- 评估人类活动对沉积物中Sb同位素特征的影响.
主要方法:
- 在ZR盆地的不同地点的沉积物中对Sb同位素组成 (ε123Sb) 的系统分析.
- 在不同矿区附近的沉积物中Sb丰富的特征.
- 在河流运输和吸附过程中对Sb同位素分离的评估.
主要成果:
- 在不同沉积物样本中观察到 ε123Sb 值的显著变化,范围从 0.50 到 5.63 ε.
- 沉积物中的丰富主要归因于采矿活动中的人为投入.
- 在河流运输过程中保留了Sb同位素特征,由于稀释或吸附Al-Fe氧化物而没有观察到显著的分化.
- 矿井受影响的河流中的Sb同位素特征可能与原来的Sb矿石不同.
结论:
- ε123Sb值的区域差异表明了Sb同位素分析用于源追踪的潜力.
- Sb同位素指纹是识别Sb来源和了解环境中的生物地球化学过程的可行工具.
- 需要进一步的研究来探索其他潜在的Sb来源和影响同位素特征的复杂地质化学过程.
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