开发和验证薄膜中的扩散梯度,用于水中的离子液体的现场监测
Si-Si Liu1, Shi-Bao Chen1, Yu-Bo Yue1
1Environmental Research Institute/School of Environment, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China. changer.chen@m.scnu.edu.cn.
Analytical methods : advancing methods and applications
|October 24, 2024
概括
使用薄膜扩散梯度 (DGT) 的新型被动采样方法有效测量淡水中的短链离子液体 (IL). 这种方法对环境监测有希望,尽管长链IL由于自然有机物干扰而存在挑战.
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:
- 离子液体 (ILs) 由于它们的广泛使用和"类似PFAS"的行为,造成了环境监测挑战.
- 需要强大的分析方法来准确确定ILs的环境相关度.
研究的目的:
- 开发和验证一种新的被动采样方法,用于测量水中的基于伊米达的离子液体.
- 评估在各种环境条件下开发方法的性能.
主要方法:
- 使用混合模式阴离子交换 (MCX) 树脂开发薄膜 (DGT) 被动采样器中的扩散梯度.
- 测量IL扩散系数和结合能力.
- 在淡水和废水环境中进行实验室和现场部署.
主要成果:
- MCX-DGT采样器显示了对ILs的高结合能力和120小时的线性积累.
- 该方法在典型的淡水中表现良好,但在高离子强度或DOM方面遇到了困难.
- 短链ILs的精确测量在尖的淡水中实现,而长链ILs由于有机物竞争而被高估.
结论:
- 开发的MCX-DGT方法是监测水生环境中短链IL的一个有希望的工具.
- 需要进一步优化,以解决长链ILs的自然有机物干扰的问题.
- 最初的实地评估表明,目前在中国南部的目标IL的使用有限.
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