Piezoelectric Ball Milling Treatment of PFAS-Laden Spent Resins

IF 8.9 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Environmental Science & Technology Letters Environ. Pub Date : 2025-03-19 DOI:10.1021/acs.estlett.5c0019610.1021/acs.estlett.5c00196

Jinyuan Zhu, Nanyang Yang, Sujan Fernando, Alan Rossner, Thomas M. Holsen and Yang Yang*,

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Abstract

Anion exchange resins (AERs) have been widely used for the removal of perfluoroalkyl and polyfluoroalkyl substances (PFAS) from water. However, regardless of whether AERs are regenerable or single use, the disposal of end-of-life AERs presents significant challenges. Conventional waste management strategies, such as landfill disposal and incineration, are increasingly under scrutiny and may face impending bans due to environmental concerns. This study introduces a nonthermal, solvent-free process for the effective destruction of PFAS on AERs by co-milling piezoelectric boron nitride (BN) powders with contaminated AERs and stainless steel (SS) balls. The approach achieved complete PFOS destruction in two types of AERs (PFA694E and AmberLite IRA 67), with near-quantitative (∼100%) defluorination observed in the treatment of PFA694E AER. Comprehensive targeted PFAS analysis and suspect screening analysis of transformation products (TPs) elucidated the reaction mechanisms and confirmed that the functional groups of AERs did not participate in the reaction. The process’s effectiveness was further validated in treating field-collected single-use AERs (PFA694 and AmberLite PSR2 Plus) contaminated with PFAS mixtures of varying chain lengths and head groups. After treatment, PFAS levels on the AERs were reduced to below the nanogram per gram detection limits, and no PFAS release was observed in standard leaching tests.

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含pfas废树脂的压电球磨处理

阴离子交换树脂（AERs）被广泛用于去除水中的全氟烷基和多氟烷基物质（PFAS）。然而，无论AERs是可再生还是一次性使用，报废AERs的处理都面临着重大挑战。传统的废物管理战略，如填埋处置和焚烧，正日益受到审查，并可能由于环境问题而面临即将禁止。本研究介绍了一种非热、无溶剂的方法，利用压电氮化硼（BN）粉末与受污染的AERs和不锈钢球共磨，有效地破坏了AERs上的PFAS。该方法在两种类型的AER （PFA694E和AmberLite IRA 67）中实现了全氟磺酸的完全破坏，在PFA694E AER治疗中观察到近定量（~ 100%）的去氟化。综合靶向PFAS分析和转化产物（TPs）可疑筛选分析阐明了反应机制，并证实AERs的官能团没有参与反应。在处理现场收集的被不同链长和头基PFAS混合物污染的一次性AERs （PFA694和AmberLite PSR2 Plus）中，进一步验证了该工艺的有效性。经处理后，AERs上的PFAS含量降至纳克/克检测限以下，在标准浸出试验中未观察到PFAS释放。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Science & Technology Letters Environ. ENGINEERING, ENVIRONMENTALENVIRONMENTAL SC-ENVIRONMENTAL SCIENCES

CiteScore

17.90

自引率

3.70%

发文量

163

期刊介绍： Environmental Science & Technology Letters serves as an international forum for brief communications on experimental or theoretical results of exceptional timeliness in all aspects of environmental science, both pure and applied. Published as soon as accepted, these communications are summarized in monthly issues. Additionally, the journal features short reviews on emerging topics in environmental science and technology.