A microscopic survey on microplastics in beverages: the case of beer, mineral water and tea

微塑料 化学 环境化学 污染 污染 食物链 瓶装水 环境科学 制浆造纸工业 环境工程 生态学 生物 工程类
作者
Yinan Li,Lin Peng,Jianxin Fu,Xueli Dai,Guoqing Wang
出处
期刊:Analyst [The Royal Society of Chemistry]
卷期号:147 (6): 1099-1105 被引量:80
标识
DOI:10.1039/d2an00083k
摘要

It has been reported that microplastics exist ubiquitously in aquatic and terrestrial environments. Microplastic surveys on diverse daily foods with high consumption possibly containing microplastics have essential implications in clarifying the contamination routes, health risk assessment, and thereby preventing food pollution. Given the dependence of microplastic pollution on the regional environment, production and transportation, it further remains an open question on the number, size distribution and type of microplastics in foods from different countries worldwide. Here, we show that daily drinks produced worldwide, including beer, mineral water and tea, are all polluted with microplastics without exception. The number of microplastics investigated in this work lies in the range of 20-80 mL-1 for the beers, 10 mL-1 for the bottled mineral water, and 200-500 g-1 for the tea leaves. Quasi-spherical particles and irregular fragments dominate the shape of microplastics in beer and mineral water, whereas tea leaves carry numerous microplastic fibers. By identification through Raman spectroscopy, we observed the presence of polystyrene (PS) and polypropylene (PP) microplastics in beers, PP in bottled mineral water, and polyethylene (PE) and polyethylene terephthalate (PET) in tea leaves. Possible contamination sources include raw materials, atmosphere, and tools and containers that release microplastics. Given the facile adsorption of heavy metals and antibiotics to microplastics in beverages, public concern may arise regarding the accumulation of microplastics through the food chain and their synergetic harmful effect. Thus, our results should inspire further efforts that may contribute to the elimination and removal of microplastics from foods.
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