典型的PFPE聚合物DEMNUM的环境可降解性
Nobuhiko Tsuda1, Yoshitaka Honda1, Edward Schaefer2
1Daikin Industries, Ltd., 1-1 Nishi-Hitotsuya, Settsu-shi, Osaka, 566-8585, Japan.
Chemosphere
|June 28, 2023
概括
DEMNUM是一种线性 perfluoropolyether聚合物,经过了环境降解测试. 结果表明DEMNUM是稳定且不可降解的,在水解,光解和生物降解条件下,低质量产品的形成最小.
科学领域:
- 环境化学环境化学
- 聚合物科学 聚合物科学
- 生态毒理学 生态毒理学
背景情况:
- perfluoropolyethers (PFPEs) 是广泛使用的聚合物,具有潜在的环境持久性.
- 了解PFPE的环境命运对于评估其生态影响至关重要.
研究的目的:
- 为了评估DEMNUM的环境退化,一个代表性的线性PFPE.
- 在各种环境条件下描述和量化低质量降解产品.
主要方法:
- 根据经合组织和美国环保署的指导方针进行了水解,间接光解和扎恩-韦伦斯生物降解试验.
- 利用液体染色学-质谱学 (LC/MS) 进行降解产品的结构特征和量化.
- 评估的聚合物降解基于较低质量的物种的形成.
主要成果:
- 在50°C的水解 yielded 微不足道的低质量物种 (<2 ppm).
- 在水中间接光解产生高达~150ppm的高酸实体.
- 扎恩-韦伦斯生物降解导致低质量物种达到80ppm,其分子比光解更大.
结论:
- 在水解,光解和生物降解条件下,DEMNUM表现出高稳定性.
- 低质量降解产品的形成是最小的,这表明环境降解能力有限.
- 像DEMNUM这样的PFPE表现出对环境破坏的抵抗力.
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