从聚乙烯化物板转移到多种类型的颗粒物中
1Research Institute of Science for Safety and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan.
Chemosphere
|July 11, 2023
概括
乙二甲基甲酸 (DEHP) 转移显著的小颗粒,如黑碳和土壤,但较小的较大颗粒. 转移速率取决于颗粒表面积,吸收在聚乙烯颗粒中起作用.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 毒理学 毒理学 毒理学
背景情况:
- 乙二甲基甲酸 (DEHP) 是一种常见的塑化剂,在聚乙烯 (PVC) 中发现.
- 了解DEHP转移到各种颗粒对于评估环境暴露和健康风险至关重要.
研究的目的:
- 量化DEHP从PVC转移到不同类型和大小的颗粒.
- 调查影响DEHP转移的因素,包括粒子特性和时间.
- 为了估计不同粒子-气体相互作用的DEHP分割系数.
主要方法:
- 测量了DEHP从PVC转移到不同尺寸的九种颗粒类型 (聚乙烯,苏打石灰玻璃,土壤,碳黑,棉).
- 转移量在14天内使用不同颗粒负载密度的被动流量采样器 (PFS) 确定.
- 根据传输数据估计了粒子/气体分割系数 (Kpg).
主要成果:
- 对于小聚乙烯颗粒 (1-10微米),黑森林土壤和碳黑,DEHP的转移率很高,相当于标准的室内灰尘.
- 对于较大的聚乙烯颗粒,苏打石灰玻璃和棉花,转移量明显较低.
- 与颗粒表面积相关的DEHP转移,有吸收到较小的聚乙烯颗粒的证据.
结论:
- 颗粒的大小和类型显著影响DEHP的转移,较小,多孔的颗粒呈现出更高的吸收率.
- 吸收是DEHP转移到某些颗粒的关键机制,特别是较小的聚乙烯.
- 苏打酸玻璃上DEHP的吸附平衡在1天内达到.
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