通过KMnO4氧化和紫外线辐射的联合,增强微塑料的降解
Thanh-Binh Nguyen1, Thi-Bao-Chau Ho1, Chiu-Wen Chen2
1Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City, 81157, Taiwan.
Journal of environmental management
|October 20, 2024
概括
这项研究引入了一种新的双重处理方法,将高酸 (KMnO4) 氧化和紫外线照射相结合,以降解水中的聚乙烯 (PE) 微塑料. 结合的方法,特别是UVC光线,在减少微塑料污染方面非常有效.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料污染,特别是聚乙烯 (PE),对水生生态系统构成重大威胁.
- 传统的水处理方法难以有效地去除或降解微塑料.
- 甲 (KMnO4) 和紫外线辐射被单独探索用于水处理,但对微塑料降解有局限性.
研究的目的:
- 调查使用KMnO4和UV辐射用于PE微塑料降解的联合先进氧化工艺 (AOP) 的有效性.
- 分析PE微塑料在双处理后的表面修饰和化学变化.
- 确定最佳条件并确定参与降解过程的关键反应物种.
主要方法:
- 聚乙烯 (PE) 微塑料经过KMnO4氧化和紫外线照射 (UVA,UVB,UVC) 的联合处理.
- 用各种表征技术分析处理的微塑料的表面形态和化学功能组.
- 量化了微塑料的体重损失和二氧化 (MnO2) 颗粒的形成.
- 评估了pH值,KMnO4度和水源对降解效率的影响.
主要成果:
- 联合KMnO4/UV处理显著降解PE微塑料,KMnO4/UVC显示出最高的有效性 (在7天内减少7.5%的重量).
- 表面分析揭示了Mn-O-Mn连接的形成和氧基和氧基的出现,这对降解至关重要.
- 该过程增强了MnO2颗粒的形成,其度因紫外线类型而异.
- 降解受到pH,KMnO4度和水源的影响,自由基和活性物种发挥了关键作用.
结论:
- 结合KMnO4和紫外线照射方法是一种高效的先进氧化工艺,用于在水环境中降解PE微塑料.
- 紫外线成分与KMnO4协同,为微塑料清除提供了最有前途的结果.
- 该方法为减轻水系统中微塑料污染提供了可行和有效的解决方案.
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