在水处理残留物中含有和多基基物质:发生和脱落
Caleb R Gravesen1, Linda S Lee2,3,4, Caroline R Alukkal3,4
1Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, Florida, USA.
Journal of environmental quality
|September 29, 2023
概括
水处理残留物 (WTRs) 含有和多基基物质 (PFAS),但不太可能成为主要的环境来源. 某些WTR可能有助于减少PFAS在环境中的流动性.
科学领域:
- 环境化学环境化学
- 水处理技术 水处理技术
- 污染物分析 污染物分析
背景情况:
- 和多醇基物质 (PFAS) 是饮用水源中令人担忧的新兴污染物.
- 在水处理残留物 (WTRs) 中PFAS的度和行为仍然在很大程度上未被探索.
- 污水处理器是市政饮用水和废水处理过程中产生的固体副产品.
研究的目的:
- 评估各种饮用水处理残留物 (DWTR) 和废水废水处理残留物 (WWETR) 中的PFAS的发生和度.
- 调查PFAS从WTRs中的脱吸潜力.
- 评估特定的WWETR在生物固体衍生孔水矩阵中减弱PFAS的能力.
主要方法:
- 在七个DWTR和一个WWETR中使用化 (ACH) 分析 perfluoroalkyl酸 (PFAA).
- 测量PFAS度使用液体染色学-双重质谱法.
- 批量实验,以确定PFAS在孔水矩阵中的WWETR的吸附和脱附.
主要成果:
- 在DWTR中检测到PFAA (03.3μg kg-1),在基于的DWTR中没有发现PFAS. ACH-WWETR显示了最高的PFAA度 (34μg kg-1).
- 观察到可以忽略的 perfluorocarboxylic 酸 (PFCAs) 的分解. perfluorosulfonic 酸 (PFSAs),特别是 PFOS,发生了一些溶解.
- ACH-WWETR证明了长链PFAA的吸附,吸附率从0%到26%不等,受WWETR质量的影响.
结论:
- 当WTRs被引入环境时,不太可能成为PFAS污染的重要来源.
- 特定的WTR,特别是ACH-WWETR,显示了减弱PFAS流动性的潜力.
- 这些发现表明,某些WTR可以作为土壤修改剂来减少PFAS迁移的潜在有益用途.
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