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.

研究集中在创建无定形和晶体塑料的集中度，以便以后在吸附测试中使用，并研究了这些类型的塑料在环境中存在的程度。对于前者，使用各种Melt/Freeze Comcles使用了晶体/无态标准，用于创建聚乙烯和PET等塑料。已经使用拉曼光谱和FTIR研究了这些塑料分析的方法。在对环境塑料的研究中，已经观察到了聚合物（例如聚乙烯和PET）的变化，并且在长期情况下，在塑料表面上，在塑料表面上的羰基的结晶度和形成的一般形成。宠物瓶的结晶度并不均匀，瓶子的顶部和底部更加无定形。这对预计发生的环境退化的程度具有影响。正如预期的那样，聚乙烯目前正在进行中，聚乙烯对降解的耐药性更大。各种类型的过滤器正在测试以了解哪种最适合在偏远位置进行采样。

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