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聚乙烯微塑料通过臭氧处理的矿化特征和行为

Jinyuan Hu¹, Jiangyong Hu¹

¹Department of Civil & Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore.

|December 1, 2023

概括

这项研究表明,催化臭氧化有效地将聚乙烯微塑料 (MP) 分解为较小的有机化合物. 这一过程提高了它们吸附污染物的能力,如ofloxacin.

科学领域:

环境化学环境化学
材料科学材料科学材料科学

背景情况:

微塑料 (MP) 污染对环境构成重大威胁.
目前对国会议员的治疗技术往往是低效的.
聚乙烯 (PE) 是一种常见且持久的环境微塑料.

研究的目的:

通过催化臭氧化来研究聚乙烯微塑料的去除方法.
评估合成催化剂 (α-MnO2和α-FeOOH) 在降解MPs中的效率.
了解国会议员的转型产品和结构变化.

主要方法:

使用α-MnO2和α-FeOOH催化剂进行催化臭氧化.
检测无机碳以模拟二氧化碳的转化.
使用扫描电子显微镜 (SEM) 和富里埃变换红外光谱-减弱总反射 (FTIR-ATR) 进行剩余MP的表征.
使用液态染色体飞行时间质谱法 (LC-TOF-MS) 识别分解产品.

主要成果:

催化臭氧化导致PE MPs的碎片化和氧化.
修改后的MPs显示了ofloxacin的增强吸附能力.
α-FeOOH显著提高了矿化效率 (3.27倍增加) 和基 (•OH) 生产.
分解产品包括具有各种功能组的低分子量有机化合物.

结论:

催化臭氧化,特别是用α-FeOOH,是降解聚乙烯微塑料的有效方法.
该过程将MP转化为不太有害的物质,并提高其污染物吸附能力.
这项研究为消除环境微塑料提供了一个可行的策略.

关键词:

催化臭氧化催化臭氧化产品产品产品产品产品 α-FeOOHH 的意思是 α-MnO ((2)) 是一种有氧化物.•OH •OH •OH •OH •OH •OH •OH

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