Microplastics (MPs) can be defined as small pieces of plastics that are less than five millimetres in diameter. MPs can be consumed and may be accumulated by filter-feeding organisms such as mussels. Therefore, this study aimed to determine the acute effects of different types, sizes and concentrations of artificially synthesized MPs on the mortality rate and MP accumulation of the green mussel Perna viridis. The samples were exposed to 66, 333, 666, and 1333 items/L of small MPs (<30 μm), medium MPs (30–300 μm), and large MPs (300–1000 μm) polystyrene (PS), polypropylene (PP), and polybutylene succinate (PBS) for 96 h. MPs accumulation in the soft tissue of mussels and mortality effects from MPs ingestion were assessed. There was no mortality observed in the control group. Small PP particles can lead to more mortality than PS and PBS particles of the same size. However, medium- and large PS caused a higher mortality percentage than the same size particles of PP and PBS. Large PS, PP, and PBS showed higher mortality potential than other sizes. MPs largely accumulated in the soft tissues rather than in gill tissues following the 96-hour exposure period. Increased accumulation of the three types of MPs was accompanied by an increase in the percentage of mussel mortality. The study highlights how particle size and type are key factors in plastic particulate toxicity.

微塑料 (MP) 可以定义为直径小于 5 毫米的小塑料片。MPs 可以被消耗，并可能被诸如贻贝之类的滤食生物积累。因此，本研究旨在确定不同类型、大小和浓度的人工合成 MPs 对绿贻贝Perna viridis的死亡率和 MP 积累的急性影响。. 样品分别暴露于 66、333、666 和 1333 项/L 的小 MP (<30 μm)、中 MP (30–300 μm) 和大 MP (300–1000 μm) 聚苯乙烯 (PS)、聚丙烯 ( PP) 和聚丁二酸丁二醇酯 (PBS) 96 小时。评估了贻贝软组织中 MPs 的积累和 MPs 摄入对死亡率的影响。在对照组中没有观察到死亡率。与相同尺寸的 PS 和 PBS 颗粒相比，小的 PP 颗粒会导致更高的死亡率。然而，与相同尺寸的 PP 和 PBS 颗粒相比，中型和大型 PS 导致更高的死亡率。大 PS、PP 和 PBS 显示出比其他尺寸更高的死亡率。在 96 小时的暴露期后，MP 主要积聚在软组织中，而不是在鳃组织中。三种类型 MP 的积累增加伴随着贻贝死亡率百分比的增加。该研究强调了粒径和类型是塑料微粒毒性的关键因素。