在实验室和现场设置中长期部署常用的DGT设备用于微量元素测量
Zhou Fang1, Ying Su1, Yaqin Yu1
1School of Civil Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu, 224007, PR China.
Analytica chimica acta
|October 13, 2024
概括
薄膜扩散梯度 (DGT) 技术显示了长期水质监测的潜力. 这项研究发现实际部署时间与理论时间有所不同,这凸显了对DGT在自然水体中的应用需要进一步研究的需要.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 水质监测 水质监测
背景情况:
- 薄膜扩散梯度 (DGT) 技术是一种用于污染物确定的被动采样方法.
- 现有的DGT设备如LSNP-NP,LSNT-NP,LSNZ-NP和LSNM-NP已被用于微量元素评估,但它们的长期现场性能基本上是未知的.
- 之前的研究报告说,DGT的部署时间比理论上预测的要短,限制了它们在各种水体中的应用.
研究的目的:
- 为了评估四个DGT设备 (LSNP-NP,LSNT-NP,LSNZ-NP,LSNM-NP) 在各种水矩阵中的长期性能.
- 将实际的DGT部署时间与实验室和现场设置中的理论预测进行比较.
- 用DGT. 评估河流和海洋环境中的微量元素度和水质.
主要方法:
- 使用合成软体,硬体和海水进行实验室实验,以测试DGT性能.
- 在自然河流和海洋环境中部署DGT设备的现场部署.
- 分析微量元素度,包括Mo,Se,As,Sb和P,使用DGT数据.
主要成果:
- 大多数元素的精确测量在软水和硬水中在4-7天内实现.
- 与淡水相比,DGT的部署时间在海水中较短.
- 在氧化离子的确定方面,LSNZ-NP DGT表现出色,而在的确定方面,LSNT-NP DGT表现优越. 现场部署证实了LSNZ-NP在7-28天内对Mo,Se,As,Sb和P等元素的强度.
- 海洋水一般显示的微量元素度高于河流环境,除了.
- 除外,所有评估的元素都符合I级水质标准.
结论:
- 这项研究揭示了在自然水体中理论和实际DGT部署时间之间的差异.
- 对于特定的微量元素和,LSNZ-NP和LSNT-NP DGT显示出强大的性能,具有扩展的现场适用性.
- 需要进一步研究,以了解部署时间差异背后的机制,并制定延长DGT应用时间的策略.
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