Microplastics in Santos São Vicente estuarine – Hotspot in sediments caused by low energy hydrodynamic events in strongly populated areas

IF 5.3 3区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Marine pollution bulletin Pub Date : 2024-11-23 DOI:10.1016/j.marpolbul.2024.117286

Duclerc Fernandes Parra , Giovana Teixeira Gimiliani , Jacinete Lima dos Santos , Niklaus Ursus Wetter , William Rodriguez Schepis , Allan Bereczki , Marycel Elena Barboza Cotrim

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Abstract

Microplastics (MPs) have emerged as a significant class of contaminants due to their widespread presence in various environmental compartments. The ingestion of these particles poses a risk to both human health and the local biota. The investigation of the Santos estuary reveals the abundance of microplastics in the mangrove sediment. The highest concentration was 62,850–93,050 MPs·kg⁻¹dw, never seen before in Latin America coast. The region investigated is characterized for silting sites and low energy events, notably Rio dos Bugres, influenced by anthropic aspects, while the São Vicente e Santos channels prevail the high energy hydrodynamic regime. In consequence, the MPs are entrapped in the interior of the estuary, affecting drastically the biota of mangrove. Spectroscopic investigation identified: polymers, pigments, herbicide and additives. The hypothesis is that densely populated siltation areas combined with low-energy events serve along the estuary for MPs accumulation and hotspots formation.

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桑托斯-圣维森特河口的微塑料--人口密集地区低能量水动力事件造成的沉积物热点

微塑料（MPs）已成为一类重要的污染物，因为它们广泛存在于各种环境区划中。摄入这些微粒会对人类健康和当地生物群构成风险。对桑托斯河口的调查显示，红树林沉积物中存在大量微塑料。最高浓度为 62,850-93,050 MPs-kg-1dw，这在拉丁美洲沿海地区从未见过。调查区域的特点是淤积地和低能量事件，特别是受人为因素影响的 Rio dos Bugres 河，而 São Vicente e Santos 河道则以高能量水动力机制为主。因此，MPs 被困在河口内部，对红树林的生物群造成了严重影响。光谱调查发现：聚合物、颜料、除草剂和添加剂。假设是人口稠密的淤积区与低能量事件相结合，导致 MPs 在河口堆积并形成热点。

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来源期刊

Marine pollution bulletin 环境科学-海洋与淡水生物学

CiteScore

10.20

自引率

15.50%

发文量

1077

审稿时长

68 days

期刊介绍： Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.