The revelry of plastic! Quali-quantitative variation of microplastics in freshwater before and after Carnival in south-eastern Brazil

IF 1.8 4区环境科学与生态学 Q2 FISHERIES

Marine and Freshwater Research Pub Date : 2024-08-20 DOI:10.1071/mf24092

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

Abstract

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.

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塑料的狂欢！巴西东南部狂欢节前后淡水中微塑料的定性定量变化

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。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine and Freshwater Research 环境科学-海洋学

CiteScore

4.60

自引率

5.60%

发文量

审稿时长

3.8 months

期刊介绍： Marine and Freshwater Research is an international and interdisciplinary journal publishing contributions on all aquatic environments. The journal’s content addresses broad conceptual questions and investigations about the ecology and management of aquatic environments. Environments range from groundwaters, wetlands and streams to estuaries, rocky shores, reefs and the open ocean. Subject areas include, but are not limited to: aquatic ecosystem processes, such as nutrient cycling; biology; ecology; biogeochemistry; biogeography and phylogeography; hydrology; limnology; oceanography; toxicology; conservation and management; and ecosystem services. Contributions that are interdisciplinary and of wide interest and consider the social-ecological and institutional issues associated with managing marine and freshwater ecosystems are welcomed. Marine and Freshwater Research is a valuable resource for researchers in industry and academia, resource managers, environmental consultants, students and amateurs who are interested in any aspect of the aquatic sciences. Marine and Freshwater Research is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.