超声波检测PFAS混合物的复杂矩阵的降解
Jay N Meegoda1, Bruno Bezerra de Souza2, Targol Teymourian2
1New Jersey Institute of Technology (NJIT), Newark, NJ, USA. jay.meegoda@njit.edu.
Environmental science and pollution research international
|October 14, 2025
概括
超声波有效降解地下水和静止底样本中的和多基物质 (PFAS). 然而,在水性薄膜形成泡 (AFFF) 中高度的PFAS需要进一步优化以完全降解.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 声化学 声化学 声化学
背景情况:
- 和多基基物质 (PFAS) 是持久的环境污染物.
- 对于复杂矩阵中的PFAS,迫切需要有效的整治策略.
- 超声波技术为PFAS降解提供了一个潜在的解决方案.
研究的目的:
- 评估超声波技术对降解PFAS的有效性.
- 在三个复杂的环境矩阵中评估PFAS降解:地下水 (GW),静底 (SB) 和水性薄膜形成泡 (AFFF).
- 为了研究矩阵组成对声解性降解效率的影响.
主要方法:
- 使用了10L超声波反应器,配有多频压电元件 (850kHz和950kHz).
- 处理PFAS污染的样本6至12小时.
- 分析了使用液态色谱-质谱 (LC-MS/MS),离子选择性电极 (F-ISE),离子色谱 (IC),核磁共振 (NMR) 谱学,总有机结合 (TOF) 分析和感应合等离子质谱 (ICP-MS) 的降解.
主要成果:
- 在SB (0至8.71毫克/升) 和GW (0.54至1.78毫克/升) 样本中观察到显著的化物释放,证实了PFAS脱.
- 水性薄膜形成泡 (AFFF) 样本显示化物增加有限 (0.75至1.37毫克/升),表明由于高度的 perfluorooctanesulfonic acid (PFOS) 而导致对声解的耐药性.
- 阳离子和金属分析揭示了矩阵特异性相互作用,化学氧需求 (COD) 与反应性基相竞争.
结论:
- 超声波技术显示,在复杂的环境矩阵 (如GW和SB) 中降解PFAS具有前途.
- 在AFFF中完成PFAS矿化,其特点是表面活性剂度高,可能需要修改后的溶解方法.
- 矩阵效应和激素清理显著影响超声波辅助PFAS降解效率.
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