与手工小型金矿相关的环境样本中的物种化,使用一种新的固相提取方法收集和保存样本
David King1,2, Michael Watts3, Elliott Hamilton2
1Nottingham Trent University, Nottingham, UK.
Environmental geochemistry and health
|October 28, 2024
概括
一种新的固体相提取方法简化了手工黄金开采地区的特异化分析. 这种技术改善了环境监测和污染对健康风险评估的数据收集.
科学领域:
- 环境化学环境化学
- 环境科学 环境科学
- 分析化学 分析化学
背景情况:
- 工业小规模金矿 (ASGM) 将 (Hg) 释放到水生生态系统中.
- 可以甲基化成高度生物利用的甲基 (MeHg),造成健康风险.
- 由于时间限制,评估水样中的Hg物种化历来是具有挑战性的.
研究的目的:
- 引入和验证一种新的固体相提取 (SPE) 方法用于特异化分析.
- 评估SPE的有效性,以便在水样中安全,容易收集和保存Hg物种.
- 评估来自肯尼亚西部ASGM遗址的水和沉积物样本中的Hg物种化.
主要方法:
- 开发和应用一种新的固相提取 (SPE) 方法,用于Hg的特异化.
- 分析水和沉积物样本中的 (Hg) 和甲基 (MeHg) 度.
- 在冷藏和未冷藏条件下,对样品在长达4周的保存稳定性的评估.
主要成果:
- 该SPE方法允许安全易于收集和保存Hg物种长达4周.
- 水样中的MeHg度低于检测极限,而Hg2+水平低于饮用水准则.
- 沉积物显示总Hg度超过了指导限值,MeHg水平根据水的停滞而波动.
结论:
- SPE是一种强大的Hg特种化方法,增强了环境监测能力.
- 尽管饮用水中MeHg含量低,但饮食来源对每周Hg摄入量有很大贡献,因此需要减少暴露.
- 这些发现支持使用SPE以更好地减轻污染战略,并了解污染对生态和人类健康的影响.
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