在土壤和动物中积累的微量元素在一个历史上被煤炭燃烧残留物污染的地点内
Kelly E Holland1,2, Tracey D Tuberville1, James C Beasley1,2
1Savannah River Ecology Lab, University of Georgia, Aiken, SC, United States.
Environmental toxicology and chemistry
|January 20, 2025
概括
传统的煤炭燃烧残留物 (CCRs) 继续污染土壤和野生动物,含有,和等有毒元素,几十年来没有自然减弱. 由于持续的生物积累,长期监测这些地点至关重要.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 环境化学环境化学
背景情况:
- 煤炭燃烧残留物 (CCR) 的遗留污染物构成了全球环境风险.
- 碳复合含有有毒的微量元素 (,,),这些微量元素会持续存在并可能对野生动物造成伤害.
- 对CCRs的处置地点可能导致环境污染和动物的暴露途径.
研究的目的:
- 量化和比较土壤和动物中的微量元素度 (As,Hg,Se,Sr) 在受CCR污染的地点与参考地点.
- 通过将当前水平与历史数据进行比较,评估这些元素在土壤中的自然衰减.
- 评估当地食品网络中测量元素的生物放大潜力.
主要方法:
- 从受CCR污染的地点和参考地点收集了土壤和动物样本.
- 测量了 (As), (Hg), (Se) 和 (Sr) 的度.
- 用稳定同位素比率来评估热带位置,以与元素体载相关联.
主要成果:
- 污染土壤中的元素度明显高于参考土壤.
- 土壤元素度从2003年到2022年没有变化,表明缺乏自然减弱.
- 与参考动物相比,来自受污染地点的动物表现出高水平的As,Se和Sr.
- 在南方中观察到 (Sr) 与热量位置之间的正相关性,这表明生物放大潜力.
结论:
- 遗留污染物在CCR污染的地点持续存在,并在各种种群中生物积累.
- 对于CCR污染的地点,长期监测计划是必不可少的,尤其是在没有积极的整治的情况下.
- 这些发现凸显了历史煤炭燃烧实践带来的持久生态风险.
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