The impact of sediment dumping sites on the concentrations of microplastic in the inner continental shelf of Rio de Janeiro/Brazil
The impact of sediment dumping sites on the concentrations of microplastic in the inner continental shelf of Rio de Janeiro/Brazil
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DOI：
10.1016/j.marpolbul.2019.110558
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发表时间：
2019-12-01
影响因子：
5.8
通讯作者：
dos Santos Filho, Joao Regis
中科院分区：
文献类型：
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作者：
Baptista Neto, Jose Antonio;de Carvalho, Diego Gomes;dos Santos Filho, Joao Regis
海洋环境不断受到人为活动的影响。目前，微塑料（MPs）是所有物质和人为来源的物质中最有害的物质之一。微塑料（MPs）是指小于5mm的颗粒。本研究介绍了巴西里约热内卢州大陆架底部沉积物中微塑料的丰度、分布、类型和颜色的信息。该地区受到强烈影响，因为它位于巴西海岸线上污染最严重的沿海海湾之一的前面。它接收来自Ipanema海滩潜艇使团的未经处理的污水，以及从里约热内卢de Janeiro港疏浚的大量沉积物，这些沉积物强烈影响了该地区MPs的分布。分析发现，100%的样品中都存在MP，主要由次级微塑料组成，近50%是纤维，其次是塑料薄膜、塑料碎片和颗粒。根据MP来源的性质，显示出多种颜色，以四种主要颜色为主：蓝色，白色，透明和黑色，这种模式可能潜在地增加其生物利用度，因为它们与猎物相似，特别是与视觉猛禽物种相似。
The marine environment is constantly being impacted by anthropogenic activities. Nowadays, microplastics (MPs) representing one of the most deleterious material among of all substances and material from anthropogenic origin. The Microplastics (MPs) are particles smaller than 5 mm. This study presents information on abundance, distribution, type and colour of microplastics in the bottom sediments of the continental Shelf of Rio de Janeiro State. This area is strongly impacted due to its location in front of one of the most polluted coastal bays in the Brazilian Coastline. It receives untreated sewage from an Ipanema Beach submarine emissary and also a great amount of sediments dredged from Rio de Janeiro Harbour, which strongly influences the distribution of MPs in the area. The analyses detected the presence of MP in 100% of the samples, composed mainly by secondary microplastics, and almost 50% were fibers, followed by plastic films, plastic fragments and pellets. Based on the nature of the sources of the MP, a great variety of colours was shown, dominated by four main colours: blue, white, transparent, and black, this pattern could potentially increase their bioavailability due to resemblance to prey items, especially to visual raptorial species.