Laboratório de Oceanografia Biológica and Centro de Estudos Avançados da Biodiversidade, Universidade Federal do Pará, Av. Augusto Corrêa s/n, Guamá, Belém, PA 66075-110, Brazil; Laboratório de Pesquisa em Monitoramento Ambiental Marinho, Universidade Federal do Pará, Av. Augusto Corrêa s/n, Guamá, Belém, PA 66075-110, Brazil.
Laboratório de Oceanografia Biológica and Centro de Estudos Avançados da Biodiversidade, Universidade Federal do Pará, Av. Augusto Corrêa s/n, Guamá, Belém, PA 66075-110, Brazil.
Sci Total Environ. 2022 Sep 15;839:156259. doi: 10.1016/j.scitotenv.2022.156259. Epub 2022 May 26.
The composition and distribution of microplastics (MPs) in the Brazilian Amazon Continental Shelf surface waters are described for the first time. The study was conducted during the 2018 rainy and dry seasons, using 57 water samples collected with aluminum buckets and filtered through a 64-μm mesh. The samples were vacuum-filtered in a still-air box, and the content of each filter was measured, counted, and classified. A total of 12,288 floating MPs were retrieved; particles were present at all 57 sampling points. The mean MP abundance was 3593 ± 2264 items·m, with significantly higher values during the rainy season (1500 to 12,967; 4772 ± 2761 items·m) than in the dry season (323 to 5733; 2672 ± 1167 items·m). Polyamides (PA), polyurethane (PU), and acrylonitrile butadiene styrene (ABS) were the most common polymers identified through Fourier Transform Infrared Spectroscopy (FTIR) analysis. Cellulose-based textile fibers were also abundant (~40%). Our results indicate that the Amazon Continental Shelf is contaminated with moderate to high levels of MPs; the highest abundances were recorded at stations near land-based sources such as river mouths and large coastal cities.
首次描述了巴西北部亚马逊大陆架海域表层水中微塑料（MPs）的组成和分布。该研究于 2018 年雨季和旱季进行，使用 57 个铝桶采集的水样，并通过 64-μm 的网进行过滤。水样在静态空气箱中进行真空过滤，测量、计数和分类每个过滤器的内容物。共回收了 12,288 个漂浮的 MPs；所有 57 个采样点都存在颗粒。MP 丰度的平均值为 3593 ± 2264 个·m，雨季（1500 至 12,967；4772 ± 2761 个·m）显著高于旱季（323 至 5733；2672 ± 1167 个·m）。傅里叶变换红外光谱（FTIR）分析表明，聚酰胺（PA）、聚氨酯（PU）和丙烯腈丁二烯苯乙烯（ABS）是最常见的聚合物。纤维素基纺织纤维也很丰富（~40%）。我们的结果表明，亚马逊大陆架受到中高浓度 MPs 的污染；在靠近河口和大型沿海城市等陆源的站点记录到了最高的丰度。
