Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao 266100, China; Institut des sciences de la mer de Rimouski, Université du Québec à Rimouski, Rimouski G5L 3A1, Canada.
Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education, Qingdao 266100, China.
Mar Pollut Bull. 2022 Apr;177:113548. doi: 10.1016/j.marpolbul.2022.113548. Epub 2022 Mar 15.
We report a high-spatial-resolution study on the distributions, characteristics, and environmental risks of microplastics in surface sediments of the southern East China Sea. Microplastics were omnipresent in the sediments (concentration range: 53.3-246.7; mean: 138.4 particles/kg dry-weight sediment) and enriched in nearshore areas close to urban centers relative to lower offshore concentrations. The microplastics identified were dominated by polyethylene (41.2%) and polyethylene terephthalate (19.9%) in polymer type, fibers (45.8%) and fragments (40.3%) in shape, 0.1-0.5 mm (61.0%) in size, and black (52.0%) in color. The benthic environment experienced low to moderate microplastic pollution, with polyvinylchloride exhibiting the highest ecological risk index. The high-resolution sampling revealed highly diverse polymer types and strongly patchy distributions of microplastic abundance and pollution indices in sediments. Results from this study imply that complex physical, biological, and topographic interactions control the distribution of microplastics and the associated environmental risks in coastal sediments.
我们报告了一项关于东海南海表层沉积物中微塑料的分布、特征和环境风险的高空间分辨率研究。微塑料在沉积物中普遍存在（浓度范围：53.3-246.7；平均值：138.4 个/公斤干重沉积物），与远离城市中心的近岸地区相比，近岸地区的浓度更高。所鉴定的微塑料在聚合物类型上以聚乙烯（41.2%）和聚对苯二甲酸乙二醇酯（19.9%）为主，在形状上以纤维（45.8%）和碎片（40.3%）为主，在尺寸上以 0.1-0.5 毫米（61.0%）为主，在颜色上以黑色（52.0%）为主。底栖环境受到低到中度的微塑料污染，其中聚氯乙烯表现出最高的生态风险指数。高分辨率采样揭示了沉积物中微塑料丰度和污染指数高度多样化的聚合物类型和强烈的斑块分布。本研究结果表明，复杂的物理、生物和地形相互作用控制了沿海沉积物中微塑料的分布和相关的环境风险。
