用于选择性地确定二元混合物中的过氧化,过氧化和过氧化硫酸盐的分析方法
Zhihao Chen1, Joseph J Pignatello1
1The Connecticut Agricultural Experiment Station, New Haven, CT 06511, United States.
Water research
|February 9, 2024
概括
这项研究开发了选择性分析方法来测量混合物中的过氧化 (H2O2),过氧化硫酸盐 (PMS) 和过氧化硫酸盐 (PDS). 这些新技术克服了水处理先进氧化过程中的干扰问题.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 水处理技术水处理技术
背景情况:
- 过氧化 (H2O2),过氧化硫酸盐 (PMS) 和过氧化硫酸盐 (PDS) 是水疗先进氧化过程 (AOP) 中的关键氧化剂.
- 这些氧化剂可能在水处理系统中并存,使单个度测量变得复杂.
- 现有的分析方法经常存在相互干扰,阻碍了准确的量化.
研究的目的:
- 评估H2O2,PMS和PDS在已建立的色度测量方法中的相互干扰.
- 开发和验证选择性分析变体,用于量化二元混合物的单个过氧化物.
- 为研究AOP机制和支持商业应用提供可靠的分析工具.
主要方法:
- 重新检查了五种已建立的色度测量方法: permanganate,氧沙酸 (Ti-oxalate),化物,N,N-二甲基-p-phenylenediamine (DPD) 和2,20-azino-bis(3-ethylbenzothiazoline-6-sulfonate (ABTS).
- 修改方法使用特定的试剂 (氧化酶,催化酶,化物) 或反应条件 (短反应时间) 来实现选择性.
- 应用开发的方法来分析复杂水矩阵 (自来水,合成水) 中的二元过氧化物混合物.
主要成果:
- 使用 permanganate (短时间),ti-oxalate,DPD (用过氧化酶) 或ABTS (用过氧化酶) 选择性地确定H2O2.
- 使用化物,DPD/ABTS (用化物催化剂) 或DPD (用催化剂,在H2O2的存在下) 选择性地确定PMS.
- 使用DPD (没有H2O2干扰) 和DPD与l-histidine预处理 (没有PMS干扰) 选择性地确定PDS.
结论:
- 经过验证的选择性色度测量方法可以准确量化二元混合物中的单个过氧化物.
- 这些方法解决了在AOP中分析共存氧化剂的关键干扰问题.
- 开发的分析工具将促进机械学的理解,并促进基于过氧化物的水处理技术的商业化.
相关概念视频
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