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Impact of tightening environmental regulations against long-chain perfluoroalkyl acids on composition of durable water repellents containing side-chain fluorinated polymers
Science of the Total Environment ( IF 8.2 ) Pub Date : 2024-06-01 , DOI: 10.1016/j.scitotenv.2024.173708
Hidenori Matsukami 1 , Junki Saito 2 , Qi Wang 3 , Yuichi Miyake 2
Science of the Total Environment ( IF 8.2 ) Pub Date : 2024-06-01 , DOI: 10.1016/j.scitotenv.2024.173708
Hidenori Matsukami 1 , Junki Saito 2 , Qi Wang 3 , Yuichi Miyake 2
Affiliation
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Tightening of environmental regulations against long-chain perfluoroalkyl acids (PFAAs) since the 2000s may have led to significant increases in the occurrence of short-chain PFAAs in the environment. Understanding the impact of the regulations on composition of durable water repellents (DWRs) is imperative to guide implementation of pragmatic actions during their use and end-of-life treatment. Substantial decreases in the frequencies of detection and concentrations of long-chain PFAAs and long-chain PFAA-precursors, and substantial increases in those of short-chain PFAAs and short-chain PFAA-precursors, have been observed in the impurities and hydrolysis products of side-chain fluorinated polymers (SCFPs). Comparison of profiles among the DWRs containing fluorinated ingredients in 2011 indicated that DWRs containing CF- and CF-SCFPs were the dominant products and accounted for 90 % of the samples, whereas DWRs containing CF- and CF-SCFPs were the dominant products and accounted for 70 % of the samples collected in 2021. Tightening of the regulations have caused decreasing applications of long-chain SCFPs and increasing use of short-chain SCFPs in DWRs containing fluorinated ingredients. The ingredients of one DWR were changed from PFAS-free alternatives to short-chain SCFPs, whereas those of another DWR were changed from short-chain SCFPs to PFAS-free alternatives. The presence of unexplained extractable organic fluorine has been observed in DWRs containing fluorinated ingredients, which may be difficult to be hydrolyzed and form known compounds. A historical series of DWRs available from before and after the tightening of regulations and a multifaceted analytical technique consisting of combustion ion chromatographic and mass spectrometric approaches combined with two extraction techniques involving ultrasonic treatment and alkaline hydrolysis revealed the impact of tightening regulations on composition of DWRs.
中文翻译:
加强对长链全氟烷基酸的环境法规对含有侧链氟化聚合物的耐用防水剂成分的影响
自2000年代以来,针对长链全氟烷基酸(PFAA)的环境法规不断收紧,可能导致环境中短链PFAA的出现显着增加。了解法规对耐用防水剂 (DWR) 成分的影响对于指导在其使用和报废处理过程中采取务实行动至关重要。在杂质和水解产物中,观察到长链 PFAA 和长链 PFAA 前体的检测频率和浓度显着降低,而短链 PFAA 和短链 PFAA 前体的检测频率和浓度显着增加。侧链氟化聚合物(SCFP)。 2011 年含氟成分 DWR 的概况比较表明,含 CF- 和 CF-SCFPs 的 DWR 是主导产品,占样品的 90%,而含 CF- 和 CF-SCFPs 的 DWR 是主导产品,占样品的 90%。 2021 年收集的样品中有 70%。法规的收紧导致长链 SCFP 在含有氟化成分的 DWR 中的应用减少,而短链 SCFP 的使用增加。一种 DWR 的成分从不含 PFAS 的替代品改为短链 SCFP,而另一种 DWR 的成分则从短链 SCFP 改为不含 PFAS 的替代品。在含有氟化成分的 DWR 中观察到存在无法解释的可萃取有机氟,这些有机氟可能难以水解并形成已知化合物。 在法规收紧之前和之后提供的一系列历史性 DWR 以及由燃烧离子色谱和质谱方法组成的多方面分析技术,结合超声波处理和碱水解两种提取技术,揭示了收紧法规对 DWR 成分的影响。
更新日期:2024-06-01
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
加强对长链全氟烷基酸的环境法规对含有侧链氟化聚合物的耐用防水剂成分的影响
自2000年代以来,针对长链全氟烷基酸(PFAA)的环境法规不断收紧,可能导致环境中短链PFAA的出现显着增加。了解法规对耐用防水剂 (DWR) 成分的影响对于指导在其使用和报废处理过程中采取务实行动至关重要。在杂质和水解产物中,观察到长链 PFAA 和长链 PFAA 前体的检测频率和浓度显着降低,而短链 PFAA 和短链 PFAA 前体的检测频率和浓度显着增加。侧链氟化聚合物(SCFP)。 2011 年含氟成分 DWR 的概况比较表明,含 CF- 和 CF-SCFPs 的 DWR 是主导产品,占样品的 90%,而含 CF- 和 CF-SCFPs 的 DWR 是主导产品,占样品的 90%。 2021 年收集的样品中有 70%。法规的收紧导致长链 SCFP 在含有氟化成分的 DWR 中的应用减少,而短链 SCFP 的使用增加。一种 DWR 的成分从不含 PFAS 的替代品改为短链 SCFP,而另一种 DWR 的成分则从短链 SCFP 改为不含 PFAS 的替代品。在含有氟化成分的 DWR 中观察到存在无法解释的可萃取有机氟,这些有机氟可能难以水解并形成已知化合物。 在法规收紧之前和之后提供的一系列历史性 DWR 以及由燃烧离子色谱和质谱方法组成的多方面分析技术,结合超声波处理和碱水解两种提取技术,揭示了收紧法规对 DWR 成分的影响。