Igor David da Costa, Eduardo de Freitas Queiroz, Natalia Neto dos Santos Nunes, Leonardo Lopes Costa, Ilana Rosental Zalmon
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引用次数: 0
摘要
背景当合成聚合物碎裂成小块，形成微塑料（MPs）时，对环境造成的污染问题就更严重了。目的我们分析了巴西狂欢节对南帕拉伊巴河（PSR）中微塑料的丰度和丰富度的影响。具体目标包括根据形状、颜色和聚合物对塑料颗粒进行分类，以及量化和比较狂欢节之前、期间和之后地表水中塑料颗粒的丰度和丰富度。方法在 2023 年使用蝠鲼网从水体表层采集样本。主要结果在 PSR 的表层水中共鉴定出 843 种 MPs。与其他两个时期相比，嘉年华活动后观察到的 MP 浓度更高。蓝色和黑色纤维是主要的 MPs。闪光和亮片只出现在狂欢节期间和狂欢节后。聚酯、聚酰胺和聚乙烯在所有时期都最多。结论我们的研究结果有力地表明，狂欢节是引入 PSR 盆地的潜在短期 MP 来源。启示在狂欢节后 10 天观察到 MP 丰度大幅增加了 170%，这一事件在 PSR 盆地的多个地点都有发生。
The revelry of plastic! Quali-quantitative variation of microplastics in freshwater before and after Carnival in south-eastern Brazil
Context
Pollution by synthetic polymers is even more problematic to the environment when this material is fragmented into small portions, forming microplastics (MPs).
Aims
We analysed the influence of the Brazilian Carnival on the abundance and richness of MPs in the Paraíba do Sul River (PSR). Specific objectives included classifying MPs by shape, colour and polymer, and quantifying and comparing the abundance and richness of surface-water MPs before, during and after Carnival.
Methods
Samples were taken from the superficial layer of the water column in 2023, by using manta net.
Key results
In total, 843 MPs were identified in the surface water of PSR. Higher MP concentrations were observed after the Carnival event than in the other two periods. Blue and black fibres were the predominant MPs. Glitter and sequin occurred only during the Carnival and post-Carnival periods. Polyester, polyamide and polyethylene were the most abundant in all the periods.
Conclusions
Our findings strongly indicated that Carnival represents a potential short-term source of MP introduction into the PSR basin.
Implications
A significant 170% increase in MP abundance was observed 10 days after the Carnival, which is an event occurring across multiple locations in the PSR basin.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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