Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, PR China.
State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong 999077, PR China.
Mar Pollut Bull. 2022 Aug;181:113940. doi: 10.1016/j.marpolbul.2022.113940. Epub 2022 Jul 16.
Microplastics (MPs) are widely present in global oceans, and can pose a threat to marine organisms. This study examined the abundance and characteristics of MPs in seawater, sediment, and organism samples collected from Hangzhou Bay. Abundance of MPs in seawater (n = 26) and sediment (n = 26) were 0.77-9.6 items/m and 44-208 items/kg dw, respectively. Size of MPs in sediment (mean 2.5 mm, range 0.21-5.3 mm) was significantly (p < 0.05) larger than that in seawater (1.1 mm, 0.13-4.9 mm). Fiber was consistently the predominant shape of MPs in seawater and sediment. The major polymer composition of MPs was polyethylene (PE; mean 47 %) in seawater, but textile cellulose (60 %) was the main polymer type of MPs in sediment. Average abundance of MPs in marine organisms (n = 388) ranged from 0.064 (zooplankton) to 2.9 (Harpodon nehereus) items/ind, with the mean size of 0.19-1.4 mm. MP abundance in marine organisms was not significantly correlated with their trophic level. Fiber was always the predominant shape of MPs in different marine organisms, contributing mean 67 (fish)-93 % (zooplankton) of total MPs. MPs in crustacean (mean 58 %), shellfish (64 %), and cephalopod (29 %) were dominated by textile cellulose. Whereas, PE (mean 44 %) and polypropylene (43 %) were the major polymer compositions of MPs in fish and zooplankton, respectively. To our knowledge, this is the most comprehensive study investigating the occurrence of MPs in environmental matrixes from Hangzhou Bay, which contributes to the better understanding of environmental behaviors of MPs in estuarine sea environment.
微塑料（MPs）广泛存在于全球海洋中，可能对海洋生物构成威胁。本研究检测了取自杭州湾的海水、沉积物和生物样本中 MPs 的丰度和特征。海水中 MPs 的丰度（n=26）和沉积物中 MPs 的丰度（n=26）分别为 0.77-9.6 个/立方米和 44-208 个/千克干重。沉积物中 MPs 的粒径（平均 2.5 毫米，范围 0.21-5.3 毫米）显著大于海水中的 MPs（1.1 毫米，0.13-4.9 毫米）（p<0.05）。纤维始终是海水和沉积物中 MPs 的主要形状。海水中 MPs 的主要聚合物组成是聚乙烯（PE；平均 47%），而沉积物中 MPs 的主要聚合物类型是纺织纤维素（60%）。海洋生物中 MPs 的平均丰度（n=388）范围从 0.064（浮游动物）到 2.9（六线鱼）个/个，平均粒径为 0.19-1.4 毫米。海洋生物中 MPs 的丰度与它们的营养级没有显著相关性。纤维始终是不同海洋生物中 MPs 的主要形状，占总 MPs 的平均 67（鱼类）-93%（浮游动物）。甲壳类（平均 58%）、贝类（64%）和头足类（29%）中的 MPs 主要由纺织纤维素组成。而鱼类和浮游动物中的 MPs 主要聚合物组成分别是 PE（平均 44%）和聚丙烯（43%）。据我们所知，这是对杭州湾环境基质中 MPs 发生情况进行的最全面研究，有助于更好地了解河口海环境中 MPs 的环境行为。
