使用聚乙二醇分析和去除回收塑料中的双酚。
Analysis and removal of bisphenols in recycled plastics using polyethylene glycol.
机构信息
Department of Chemical Engineering, University of Alicante, P.O. Box 99, 03080, Alicante, Spain.
Institute of Chemical Process Engineering, University of Alicante, P.O. Box 99, 03080, Alicante, Spain.
出版信息
Sci Rep. 2024 Jun 4;14(1):12824. doi: 10.1038/s41598-024-63800-7.
This study examines the presence of bisphenol A (BPA), S (BPS), F (BPF), and M (BPM) in various recycled plastics readily available on the market (LDPE, HDPE, PET, and PP), in light of European Food Safety Authority (EFSA) limits. Twenty samples of different origin are analyzed, cleaning treatments are applied, and the migration potential of these bisphenols into food is studied. BPM is absent in all samples, but a post-consumer recycled LDPE sample reveals high bisphenol concentrations, raising concerns, reaching 8540 ng/g, 370 ng/g, and 29 ng/g of BPA, BPS, and BPF, respectively. Migration tests show substantial migration of these contaminants into food simulants. Using a cleaning treatment with polyethylene glycol (PEG 400) reduces BPA in LDPE, HDPE, PP, and PET samples by 95%, 99%, 97% and 28%, respectively, highlighting the importance of cleaning treatments across various polymers in plastic recycling. These findings not only protect food safety but addressing environmental challenges associated with plastic recycling.
本研究旨在根据欧洲食品安全局（EFSA）的限量标准，检测市场上常见的回收塑料（LDPE、HDPE、PET 和 PP）中双酚 A（BPA）、S（BPS）、F（BPF）和 M（BPM）的存在情况。分析了 20 个不同来源的样品，进行了清洗处理，并研究了这些双酚类物质向食品中的迁移潜力。所有样品中均未检出 BPM，但一个消费后回收的 LDPE 样品显示出高浓度的双酚类物质，令人担忧，分别达到 8540ng/g、370ng/g 和 29ng/g 的 BPA、BPS 和 BPF。迁移测试表明这些污染物大量迁移到食品模拟物中。使用聚乙二醇（PEG 400）进行清洗处理可使 LDPE、HDPE、PP 和 PET 样品中的 BPA 分别减少 95%、99%、97%和 28%，这突出了在塑料回收过程中对各种聚合物进行清洗处理的重要性。这些发现不仅保护了食品安全，还解决了与塑料回收相关的环境挑战。
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