Microplastics/microfibers in settled indoor house dust exploratory case study for 10 residential houses in the Kanto area of Japan
Microplastics/microfibers in settled indoor house dust exploratory case study for 10 residential houses in the Kanto area of Japan
复制标题
日本关东地区 10 栋住宅室内沉降灰尘中的微塑料/微纤维探索性案例研究
DOI：
10.1002/2475-8876.12298
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发表时间：
2022
影响因子：
0.9
通讯作者：
Ito Kazuhide
中科院分区：
文献类型：
--
作者：
Lim Eunsu;Tanaka Hirofumi;Ni Yuan;Bai Yifan;Ito Kazuhide
尽管海洋生态系统中的微塑料（尺寸≤5 mm）污染受到全球关注，但室内环境中微塑料和微纤维的存在也是一个主要问题。与海洋中微塑料的现有实地调查数据相比，室内环境的此类信息仍然有限。室内环境中的微塑料可能会作为化学化合物的吸附剂，这可能会对居民的健康造成多重不利影响。需要建立可重复的采样和分析方法，以帮助日本室内微塑料的全面现场测量。本研究首次对日本关东地区10户居民住宅的沉降灰尘中的室内微塑料进行了实地调查，并探讨了它们的组成和形态。采用微傅里叶变换红外（μ-FT-IR）分光光度法和激光直接红外（LIFE）分析法对微塑料进行定性分析。微傅立叶变换红外光谱（μ-FT-IR）和紫外光谱分析显示，沉降的灰尘中存在大量的微塑料。样品由纤维素、聚对苯二甲酸乙二醇酯、聚乙烯、醇酸树脂、聚砜、聚乙烯醇和聚酰胺组成。μ-FT-IR和LIFE分析分别适用于识别大纤维材料和小颗粒。因此，这两种方法是互补的，为沉降尘中的微塑料成分的全面鉴定。
Although microplastic (size ≤5 mm) pollution in marine ecosystems has received global attention, the presence of microplastics and microfibers in indoor environments is also a major concern. Compared to the available field survey data on microplastics in the ocean, such information remains limited for indoor environments. Microplastics in indoor environments may act as adsorbents for chemical compounds, which may result in multiple adverse health effects on residents. Establishment of reproducible sampling and analysis methods aiding comprehensive field measurements of indoor microplastics in Japan is required. This study conducted the first field survey of indoor microplastics in settled dust in 10 residential houses in the Kanto area of Japan and explored their composition and morphology. Micro‐Fourier transform infrared (μ‐FT‐IR) spectrophotometry and laser direct infrared (LDIR) analysis were used for the qualitative analysis of microplastics. The μ‐FT‐IR and LDIR analyses revealed the presence of large quantities of microplastics in the settled dust. The samples were composed of cellulose, polyethylene terephthalate, polyethylene, alkyd resins, polysulfone, polyvinyl alcohol, and polyamides. The μ‐FT‐IR and LDIR analyses were suitable for identifying large fibrous materials and small particles, respectively. Thus, the two methods are complementary for the comprehensive identification of microplastic composition in settled dust.