现场方法用于保存水中的总,包括与工业规模黄金开采相关的方法
David C P King1,2, Michael J Watts2, Elliott M Hamilton2
1Nottingham Trent University, Nottingham, UK.
Analytical methods : advancing methods and applications
|April 16, 2024
概括
一种新的固体相提取方法简化了 (Hg) 采样在像手工黄金矿这样具有挑战性的环境中. 这种强大的技术确保了自然水域的精确Hg监测,有助于环境和健康评估.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 在自然水中进行 (Hg) 分析是很困难的,尤其是在手工和小规模金矿开采 (ASGM) 地区.
- 现有的取样方法往往是危险的,昂贵的,并且在后勤上具有挑战性.
- 需要一种实用且可靠的方法来采样和保存各种水体中溶解的.
研究的目的:
- 开发和验证一种基于固体相提取 (SPE) 的方法,用于采样和保存自然水样中的溶解.
- 评估在各种储存条件和流量下方法的有效性.
- 在肯尼亚手工黄金矿的水样中部署监测方法.
主要方法:
- 开发了一种固体相提取 (SPE) 方法,用于采样和保存.
- 经过测试的Hg回收率 (85%±10%超过4周) 和在不同的储存条件下 (4°C和16°C) 的稳定性.
- 评估的SPE流速 (2,5,10 mL min-1) 和吸附剂稳定性用于突破.
- 在肯尼亚卡卡梅加金带部署了该方法,以测量各种水源中的Hg.
主要成果:
- 在4周的储存时间内实现了高总Hg回收率 (85%±10%).
- 从加的河水中显示出出色的回收 (94%±1%).
- 在经过测试的流量和长达2周的吸附剂使用时,证实没有Hg突破.
- 在大多数水域测量Hg度低于世卫组织限制,但在饮用水源中检测到高达0.35μg L-1.
结论:
- 开发的SPE方法是采样和保存自然水中溶解的的一种强大而实用的方法.
- 该方法适用于ASGM场所等具有挑战性的环境,改善监测数据质量.
- 这些发现突显了ASGM地区附近饮用水源中微量含量的潜在长期健康风险.
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