The study of amorphous and crystalline microplastics in the Japanese atmosphere

日本大气中非晶态和晶态微塑料的研究

• 批准号: 22K18041
• 负责人: 長門 豪
• 金额: $ 3万
• 依托单位: Shimane University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K18041/
• 关键词: microplastics; polymer crystallinity; FTIR; Raman spectroscopy; Atmospheric pollution; Air sampling; Polyethylene; Coastal pollution; Microplastics; Atmospheric particulate; Waste combustion; Contaminant adsorption

Research has been centered on the creation of amorphous and crystalline plastics for later use in adsorption tests, as well as studying the extent to which these types of plastics exist in the environment.For the former, plastics such as polyethylene and PET have been used for creating crystalline/amorphous standards using various melt/freeze cycles. Methods for the analyses of these plastics have been examined using both Raman spectroscopy and FTIR.In studies of environmental plastics, the change in polymers such as polyethylene and PET have been observed, with general increases in crystallinity and formation of carbonyl groups on the surface of plastics exposed to uv over long periods outdoors. The crystallinity of PET bottles is not uniform, with the tops and bottoms of bottles being more amorphous. This has implications for the extent of environmental degradation expected to occur. As expected, polyethylene was comparatively more resistant to degradation.Atmospheric sampling is currently ongoing, with various types of filters being tested to understand which is best for sampling in remote locations.

研究主要集中在无定形和结晶塑料的制备上，以备后续用于吸附测试，以及研究这些类型的塑料在环境中的存在程度。对于前者，聚乙烯和PET等塑料已用于使用各种熔融/冷冻循环制备结晶/无定形标准品。通过拉曼光谱和傅里叶变换红外光谱对这些塑料的分析方法进行了研究。在环境塑料的研究中，观察到聚乙烯和PET等聚合物的变化，结晶度普遍增加，长时间暴露在户外紫外线下的塑料表面上形成羰基。PET瓶的结晶度不均匀，瓶的顶部和底部更无定形。这对预计将发生的环境退化程度具有影响。正如预期的那样，聚乙烯相对更耐降解，目前正在进行大气采样，对各种类型的过滤器进行测试，以了解哪种过滤器最适合在偏远地区采样。

项目成果

Abundance and characterization of microplastics in amphipods from the Japanese coastal environment

• DOI: 10.1007/s11356-023-25878-w
• 发表时间: 2023-02
• 期刊: Environmental Science and Pollution Research
• 影响因子: 5.8
• 作者: Yasuharu Katte;Junya Saito;Edward G. Nagato