纳米纤维和添加剂在不同土壤中的面膜老化过程中的释放潜力
Yishen Shi1, Xiaona Li1, Rui Cao1
1Institute of Environmental Processes and Pollution Control, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China.
Journal of hazardous materials
|May 13, 2025
概括
面具将纳米纤维和塑料添加剂释放到土壤中,化学特性是主要的驱动因素. 这种污染带来了风险,特别是在具有特定土壤类型的人口密地区,需要在未来关注.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 材料科学 材料科学 材料科学
背景情况:
- 在COVID-19大流行期间广泛使用口罩引发了对土壤污染的担忧.
- 影响老化口罩中纳米纤维和塑料添加剂释放的特定土壤特性尚不清楚.
研究的目的:
- 调查各种中国土壤中的口罩中纳米纤维和塑料添加剂的释放动力学.
- 为了确定主导的土壤因素和控制污染物释放的机制.
- 预测与面具衍生土壤污染物相关的全球暴露风险.
主要方法:
- 在六种不同的中国土壤中进行了面具老化实验.
- 48小时老化后释放的纳米纤维和塑料添加剂的量化.
- 对影响释放的土壤化学,生物和物理性质的分析.
- 在现场应用Zymography和土壤代谢学来评估微生物贡献.
- 全球风险预测地图的开发.
主要成果:
- 大量的纳米纤维 (6.10201.24 × 10^12颗粒/面具) 和塑料添加剂 (5.64215.64毫克/面具) 被释放出来.
- 土壤的化学特性对纳米纤维释放的影响最大,其次是生物和物理特性.
- 酸性土壤促进了无机添加剂的释放;高溶解的有机碳和低电导率有利于有机添加剂的释放.
- 已证实微生物代谢有助于掩盖衰老并破坏土壤代谢稳定性.
结论:
- 土壤的特性,特别是化学因素,对面具衍生污染物的释放有重大影响.
- 特定的土壤条件 (例如酸度,有机碳含量,电导率) 决定了释放的添加剂的类型和数量.
- 面具污染物构成相当大的未来环境风险,特别是在具有导电性土壤类型的人口密集地区.
- 流行病相关废物对土壤生态系统的长期影响需要持续的监测和缓解战略.
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