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在德黑兰和诺什哈尔的MSW焚烧炉中,微塑料的数量和形态是灰

Behzad Valizadeh¹, Mohammad Ali Abdoli², Rouhalla Mahmoudkhani³

¹Department of Environmental Engineering, Faculty of Environment, University of Tehran, Tehran, Iran.

Scientific reports

|August 7, 2025

概括

城市固体废物焚烧炉在其灰中产生微塑料,其中65.3%小于10微米. 常见的类型包括聚乙烯和聚烯,主要是蓝色的,表明焚烧炉不能消除微塑料污染.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

城市固体废物 (MSW) 焚烧提供了诸如减少废物和发电等好处.
然而,灰生产和气体排放是严重的环境问题.
在焚烧炉灰中微塑料的存在和特征仍未得到充分研究.

研究的目的:

量化和描述伊朗活跃的MSW焚烧炉灰中存在的微塑料.
识别灰中的微塑料的类型,大小,颜色和元素组成.
评估焚烧在微塑料污染生命周期中的作用.

主要方法:

从伊朗的焚烧炉取了一年的灰样本.
使用和化溶液和浮动提取微塑料.
通过光学和立体显微镜分析微塑料的数量和特征.
使用拉曼光谱学识别聚合物类型.
使用扫描电子显微镜 (SEM) 和能量分散式X射线光谱 (EDS) 对微塑料表面的元素分析.

主要成果:

在所有灰样本中检测到微塑料,其中65.3%的测量小于10微米.
在Nowshahr和德黑兰的样本中,微塑料度分别在每100克68-193到104-212颗粒之间.
聚乙烯 (35%) 和聚烯 (22%) 是最常见的聚合物;蓝色是主导的颜色 (40.5-41%).
在SEM-EDS分析中,发现微塑料表面含有高比例的金属 (铁,,) 和碳,和等元素.

结论:

垃圾焚烧并不能消除微塑料污染;微塑料存在于由此产生的灰中.
这些发现凸显了减少废物流中的塑料含量的必要性.
必须制定环境战略,以防止微塑料从焚烧过程中释放到环境中.

关键词:

环境环境环境环境城市固体废物城市固体废物塑料废弃物塑料废弃物废物管理废物管理

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