简化前处理方法,以测量酸盐氧同位素在石溶液中的含量
Yanhua Xie1, Zifan Wu2, Xuewen Xie2
1State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China; College of Ecology and Environment, Chengdu University of Technology Chengdu, 610059, China.
Journal of environmental management
|December 24, 2023
概括
一种使用/聚乙烯醇 (Zr/PVA) 凝珠的新方法简化了酸盐丰富用于氧同位素 (δ18Op) 分析. 这种技术有效地追踪复杂的合石浸出物中的污染,具有高酸盐回收.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 同位素地球化学 同位素地球化学
背景情况:
- 石堆叠会通过排水和透在水体中造成严重的污染.
- 酸氧同位素 (δ18Op) 分析对于追踪污染至关重要.
- 现有的 δ18Op 缩和净化方法是复杂的,昂贵的,低效的,并且与复杂的矩阵 (如合石膏浸出物) 斗争.
研究的目的:
- 开发一种简化,优化的预处理方法,用于在石液中测量 δ18Op.
- 在δ18Op分析中提高效率和酸盐回收.
- 在具有挑战性的环境样本中提供可靠的方法来追踪污染.
主要方法:
- 开发了一种使用/聚乙烯醇 (Zr/PVA) 凝珠进行酸盐丰富的预处理方法.
- 优化缩条件,包括pH (<7) 和Zr/PVA剂量.
- 通过pH调整而不是传统的阴离子交换进行简化净化,实现高效的离子去除和高酸盐回收 (98.66%在pH5.02).
主要成果:
- Zr/PVA凝珠在各种度中显示出对酸盐丰富的高选择性.
- 优化的方法显示,石溶液中常见的杂质不会产生不良影响.
- 鉴定证实该方法产生高纯度的银酸盐 (Ag3PO4),适合在没有同位素分离的情况下测量 δ18Op.
结论:
- 开发的Zr/PVA凝珠方法为δ18Op分析提供了简化,高效和成本效益的预处理.
- 这种方法对于复杂的样品,如石液,特别有效,克服了传统技术的局限性.
- 这项研究为准确追踪污染源提供了一个有希望和可靠的工具.
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