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Microplastics in take-out food containers

微塑料 环境科学 废物管理 业务 环境化学 化学 渔业 环境工程 生物 工程类
作者
Fangni Du,Huiwen Cai,Qun Zhang,Qiqing Chen,Huahong Shi
出处
期刊:Journal of Hazardous Materials [Elsevier]
卷期号:399: 122969-122969 被引量:281
标识
DOI:10.1016/j.jhazmat.2020.122969
摘要

Microplastics have been detected in various media including water, sediment, and seafood, whereas there are few studies focusing on microplastics in take-out containers. In this study, we collected take-out containers made of common polymer materials (polypropylene, PP; polystyrene, PS; polyethylene, PE; polyethylene terephthalate, PET) from five cities in China. Microplastics in the containers were analyzed after different treatments (direct flushing and flushing after immersing with hot water). Our results showed that microplastics were found in all take-out containers and abundance ranged from 3 to 29 items/container. The highest abundance occurred in PS containers with rough surface. The polymer types of some detected particles were the same as those of original containers, accounting for 30% of the total microplastics; other types included polyester, rayon, acrylic, and nylon. Treating the containers with hot water did not influence microplastic abundance. Our study indicates that microplastics in take-out containers come from atmospheric fallout and flakes from container’s inner surfaces. Under slight mechanical force, loose structure and rough surface of PS containers can flake off microplastics, entering water more easily. Based on the microplastic abundance in take-out containers, people who order take-out food 4–7 times weekly may ingest 12–203 pieces of microplastics through containers.
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