Identification of Microfibers in the Environment Using Multiple Lines of Evidence
Identification of Microfibers in the Environment Using Multiple Lines of Evidence
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DOI：
10.1021/acs.est.9b05262
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发表时间：
2019-10-15
影响因子：
11.4
通讯作者：
Rochman, Chelsea
中科院分区：
文献类型：
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作者：
Zhu, Xia;Brian Nguyen;Rochman, Chelsea
微纤维，其特征在于从尺寸小于5 mm的纺织品脱落的小纤维，是环境中的主要污染物。因此，重要的是我们有方法准确地量化和表征它们，包括水，沉积物，野生动物，海鲜和饮用水样品。不幸的是，它们的尺寸小以及微纤维本身存在不同的染料，导致通过全衰减共振傅里叶变换红外和拉曼的传统光谱方法进行识别时遇到困难。为了帮助解决这些方法上的挑战，我们开发了一种新的方法，采用聚合物-染料结合化学，密度测试，独特的表面形态特征和荧光染色来识别环境样品中的微纤维。本文介绍的鉴定方法在我们的实验室中通过使用从新纺织品和环境样品中脱落的微纤维进行试验进行了测试。我们发现，该方法可以成功地应用于识别微纤维的不同聚合物类型，这最终可以帮助源分配微纤维污染的环境。
Microfibers, characterized as small fibers shed from textiles that are less than 5 mm in size, are a prominent contaminant in the environment. Thus, it is important that we have methods to accurately quantify and characterize them, including in water, sediment, wildlife, seafood, and drinking water samples. Unfortunately, their small size and the presence of different dyes on the microfibers themselves cause difficulties in identification via conventional spectroscopic methods of total attenuated resonance-Fourier transform infrared and Raman. To help solve some of these methodological challenges, we developed a new method employing polymer-dye binding chemistry, density tests, unique surface morphological traits, and fluorescent staining to identify microfibers in environmental samples. The identification method introduced here was tested in our laboratory via trials using microfibers shed from new textiles and environmental samples. We found that the method can be successfully applied to identify the different polymer types of microfibers, which can ultimately help source apportion microfiber contamination in the environment.