在道路灰尘中微塑料的来源可追溯性,使用有机/无机塑料添加剂作为化学指标
Shinnosuke Yamahara1, Reiji Kubota2, Thant Zin Tun1
1Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
The Science of the total environment
|May 8, 2024
概括
分析了道路灰尘中的塑料添加剂微塑料,以确定它们的来源. 发现道路油漆是主要来源,强调添加剂是追踪微塑料污染的关键指标.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料 (MP) 是一个重要的全球环境问题.
- 识别道路灰尘中MP的来源对于减轻通过雨水排放而造成的水污染至关重要.
- 由于缺乏合适的指标,阻碍了道路尘埃来源的识别.
研究的目的:
- 利用有机/无机塑料添加剂作为化学指标,用于追踪道路灰尘中MP的来源.
- 分析商业塑料制品的添加剂概况,并将其与道路灰尘中发现的MP进行比较.
主要方法:
- 在142个商业塑料制品中,聚合物,有机添加剂和重金属的表征.
- 在日本熊本市17个道路尘埃样本中分析MP (1-5毫米直径) 和其添加剂化学物质.
- 塑料制品和道路灰尘MP之间的添加剂配置的比较,以确定来源.
主要成果:
- 在商业塑料中发现了147种有机添加剂和17种重金属,根据聚合物类型和应用,它们具有不同的配置.
- 聚甲基甲酸 (PMMA) 是道路灰尘MP中占主导地位的聚合物 (86%),其次是EVA和PVC.
- 道路油漆 (60%),盲人字块 (23%),道路标记纸 (8.3%) 和反射器 (2.4%) 根据添加资料被确定为道路灰尘中的MP的主要来源.
结论:
- 有机和无机塑料添加剂作为有效的化学指标,用于追踪道路灰尘中的MP的来源.
- 与道路相关的塑料,特别是道路涂料,是城市道路灰尘中微塑料污染的重要贡献者.
- 了解这些来源可以制定有针对性的战略来减少微塑料排放.
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