Analysis of photocatalytic degradation of polyamide microplastics in metal salt solution by high resolution mass spectrometry

IF 6.9 Q1 Environmental Science

Journal of environmental sciences Pub Date : 2023-06-22 DOI:10.1016/j.jes.2023.06.018

Yunjin Zhong, Lebing Zhuo, Wangyang Lu

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Abstract

Microplastic pollution has become one of the most concerned focuses in the world. Among many treatment methods, photocatalysis is considered to be one of the most environmentally friendly methods. In this work, the photodegradation behavior of polyamide microplastics is studied by using polyamide 6 PA6) as model microplastics and FeCl₃ as catalyst. It is hoped that the PA6 fiber can be effectively degraded by utilizing the strong oxidizing active species that can be produced after FeCl₃ is irradiated in water. The results shows that PA6 fiber can be almost completely degraded after 10 days of irradiation in FeCl₃ aqueous solution, indicating that it is promising to use this new method to solve the problem of PA6 type microplastics. In addition, the chain scission mechanism and degradation process of PA6 are analyzed in detail by ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS), which provides a new insight for the study of polymer degradation mechanism.

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金属盐溶液中聚酰胺微塑料光催化降解的高分辨质谱分析

微塑料污染已成为全世界关注的焦点之一。在许多处理方法中，光催化被认为是最环保的方法之一。以聚酰胺6（PA6）为模型微塑料，FeCl3为催化剂，研究了聚酰胺微塑料的光降解行为。希望通过利用FeCl3在水中照射后产生的强氧化活性物质，可以有效地降解PA6纤维。结果表明，PA6纤维在FeCl3水溶液中辐照10天后几乎可以完全降解，表明用这种新方法解决PA6型微塑料的问题是有希望的。此外，通过超高效液相色谱-串联质谱（UPLC-MS）对PA6的断链机理和降解过程进行了详细分析，为聚合物降解机理的研究提供了新的思路。

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来源期刊

Journal of environmental sciences Environmental Science (General)

CiteScore

12.80

自引率

0.00%

发文量

审稿时长

17 days

期刊介绍： Journal of Environmental Sciences is an international peer-reviewed journal established in 1989. It is sponsored by the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, and it is jointly published by Elsevier and Science Press. It aims to foster interdisciplinary communication and promote understanding of significant environmental issues. The journal seeks to publish significant and novel research on the fate and behaviour of emerging contaminants, human impact on the environment, human exposure to environmental contaminants and their health effects, and environmental remediation and management. Original research articles, critical reviews, highlights, and perspectives of high quality are published both in print and online.