Santos Luana Francy Oliveira, Neu Vania, Monteiro Raqueline Cristina Pereira, Kütter Vinicius Tavares, Morais Leonardo Mario Siqueira, Soares-Gomes Abilio, Chelazzi David, Giarrizzo Tommaso, Martinelli Filho José Eduardo
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.
Instituto Socioambiental e dos Recursos Hídricos, Universidade Federal Rural da Amazônia, Belém, PA 66.077-830, Brazil.
Mar Pollut Bull. 2023 Oct;195:115525. doi: 10.1016/j.marpolbul.2023.115525. Epub 2023 Sep 12.
The role of Amazon on the transport and as a source of microplastics (MPs) to the ocean is uncertain. This study is an assessment on the distribution of MPs and microfibers (MFs) in a portion of the Amazon delta. Guajará bay is a potential source for surrounding waters, since a metropolis is located at the right margin. Surface water samples were collected during the dry and rainy season of 2014/2015 at six stations. MP and MF abundance ranged from 218 to 5529.98 (1565.01 ± 196.94) particles·m. Transparent, white and blue particles were frequent. Higher values were detected on the right, urbanized margin of the bay (p = 0.0124). Most of the particles were anthropogenic cellulose fibers (68.8 %). Polyethylene terephthalate (52.9 %) and polyamide (34.4 %) were the dominant polymers. Our results indicate higher MP and MF abundances near to the potential source, the urban nucleus, and related to local hydrodynamic characteristics.
亚马逊河在向海洋输送微塑料（MPs）以及作为海洋微塑料来源方面所起的作用尚不确定。本研究对亚马逊河三角洲部分区域的微塑料和微纤维（MFs）分布进行了评估。瓜贾拉湾是周边水域微塑料的一个潜在来源，因为在其右岸有一座大城市。2014/2015年旱季和雨季期间，在六个站点采集了地表水样本。微塑料和微纤维的丰度范围为218至5529.98（1565.01±196.94）个颗粒·立方米。透明、白色和蓝色颗粒较为常见。在海湾城市化的右岸检测到更高的值（p = 0.0124）。大多数颗粒为人造纤维素纤维（68.8%）。聚对苯二甲酸乙二酯（52.9%）和聚酰胺（34.4%）是主要聚合物。我们的结果表明，靠近潜在来源（城市核心区）的微塑料和微纤维丰度更高，且与当地水动力特征有关。
