使用聚乙烯糖醇在回收塑料中分析和去除双
Samuel S Núñez1,2, Núria Ortuño1,2, Sabrina Fernández-Durán1
1Department of Chemical Engineering, University of Alicante, P.O. Box 99, 03080, Alicante, Spain.
Scientific reports
|June 4, 2024
概括
像LDPE这样的回收塑料可能含有有关双A (BPA),S (BPS) 和F (BPF) 的水平. 清洁处理显著减少这些污染物,确保更安全的食品接触材料.
科学领域:
- 环境化学环境化学
- 食品安全科学 食品安全科学
- 聚合物科学 聚合物科学
背景情况:
- 回收塑料越来越多地用于食品包装,这引发了人们对化学物质迁移的担忧.
- 双,包括BPA,BPS和BPF,是常见的塑料添加剂,具有潜在的健康影响.
- 欧洲食品安全局 (EFSA) 制定了与食品接触材料中的污染物的监管限制.
研究的目的:
- 在各种回收塑料 (LDPE,HDPE,PET,PP) 中量化双A (BPA),S (BPS),F (BPF) 和M (BPM).
- 评估这些双的迁移潜力进入食品模拟剂.
- 评估清洁处理方法在减少回收塑料中双二醇污染的有效性.
主要方法:
- 对20个回收塑料样本 (LDPE,HDPE,PET,PP) 的双含量进行分析.
- 应用清洁处理,特别是聚乙烯糖醇 (PEG 400).
- 使用食品仿真剂的迁移试验,以确定污染物转移.
主要成果:
- 在任何样本中都没有检测到双M (BPM).
- 一个消费者回收后的LDPE样本显示了BPA (8540 ng/g),BPS (370 ng/g) 和BPF (29 ng/g) 的高度.
- 迁移测试证实了这些双的大量浸出到食品模拟剂中.
- PEG 400清洗显著降低了BPA水平:LDPE的95%,HDPE的99%,PP的97%,PET的28%.
结论:
- 回收塑料,特别是LDPE,可以成为重要的双污染源.
- 有效的清洁处理对于减轻从回收塑料到食品中的双转移至关重要.
- 这些发现支持在食品应用和环境保护领域的塑料回收利用中加强安全措施.
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