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在垃圾填埋污水中的长链完全化碳酸:提取,检测和生物降解

Pratishtha Khurana¹, Xuhan Shu¹, Gurpreet Kaur¹

¹Department of Civil Engineering, Lassonde School of Engineering, York University, Canada.

Journal of environmental management

|December 14, 2024

概括

垃圾填埋场泄漏持久性和多基物质 (PFAS),威胁到水质. 这项研究发现,本地垃圾填埋场细菌可以降解PFNA和PFDA等长链PFCA,提供了一个有前途的生物修复策略.

科学领域:

环境化学环境化学
环境微生物学环境微生物学
分析化学分析化学

背景情况:

垃圾填埋场是化物和多化物质 (PFAS) 的重要来源,污染了液并威胁到水资源.
长链 perfluoro carboxylic 酸 (LC-PFCAs) 是持久的环境污染物,关于它们在垃圾填埋场液中的存在的数据有限.
有效监测和控制垃圾填埋污水中的LC-PFCAs对于环境保护至关重要.

研究的目的:

开发和验证用于提取和检测LC-PFCAs在垃圾填埋场液中的分析方法.
调查垃圾填埋场本土细菌在LC-PFCAs上的生物降解潜力.
为了确定能够降解LC-PFCAs的特定细菌属.

主要方法:

固相提取 (SPE) 用于从垃圾填埋场液中提取LC-PFCA.
液体染色学-双重质谱法 (LC-MS/MS) 用于对LC-PFCAs的敏感和准确检测.
使用来自垃圾填埋场的本地微生物群落进行了生物降解实验,这些微生物群落来自加PFNA和PFDA的污水.

主要成果:

在稀释的液样本中,SPE显示LC-PFCA的效率和回收率更高.
与直接注射MS相比,LC-MS/MS提供了更高的灵敏度和准确性,检测极限较低.
在液中检测到高非酸 (PFNA) 和高二酸 (PFDA) 的显著度 (分别为30-640 ng/L和40-510 ng/L).
在高度下,本地微生物群落实现了35.26% ± 5.47%的PFNA降解和53.38% ± 6.54%的PFDA降解.
包括Aeromonas,Proteus,Moheibacter,Pseudochrobactrum,Providencia和Pseudomonas在内的细菌属显示出LC-PFCA降解的潜力.

结论:

强大的分析方法,特别是与SPE相结合的LC-MS/MS,对于准确的LC-PFCA监测在垃圾填埋场的液中至关重要.
在垃圾填埋场液中存在的本土细菌具有生物降解LC-PFCAs的能力,包括PFNA和PFDA.
确定的特定细菌系为开发生物修复策略提供了有希望的候选人,以减轻垃圾填埋场造成的LC-PFCA污染.

关键词:

生物降解生物降解溶解液是一种溶解液.长链的PFCA是长链的PFCA.perfluoro Decanoic 酸是一种不常见的化学药物 .透非亚诺酸是一种非亚诺酸.

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