Masseroni Andrea, Federico Lorenzo, Villa Sara
Department of Earth and Environmental Sciences, DISAT, University of Milano-Bicocca, Piazza Della Scienza 1, 20126, Milan, Italy.
Heliyon. 2024 Nov 5;10(23):e40065. doi: 10.1016/j.heliyon.2024.e40065. eCollection 2024 Dec 15.
The aim of this study was to evaluate the effects of chronic exposure (21 days) to an environmentally relevant concentration (10 μg/L) of two different nanoplastic (NP) polymers on the aquatic model organism . This study examined the impact of exposure to 200 nm polystyrene nanoplastics (PS-NPs) and polyvinyl chloride nanoplastics (PVC-NPs), which had an average size similar to that of PS-NPs (ranging from 50 nm to 350 nm). The effects of polymer exposure on morphometric parameters, number of molts, swimming behaviour, and reproductive outcomes were evaluated. The findings indicate that PVC exposure induced higher body dimensions, while both polymers resulted in an increase in molting behaviour. Moreover, exposure to PVC-NPs had a negative impact on the reproduction of , as evidenced by a delay in the day of the first brood, a reduction in the total number of offspring produced, and, consequently, a slower population growth rate. It is hypothesised that the ingestion of PVC-NPs by may have resulted in an impairment of ecdysone hormone functionality and that the increased moulting events potentially representing an adaptive response to the negative effects of PVC-NP adhesion to the organism's body surfaces. These two organisms' responses could concur to explain the observed effects. This study identified the fitness impairments caused by exposure to PVC-NPs, which can lead to relevant ecological consequences. The comparative analysis of the effects induced by two types of polymers has revealed the generation of disparate hazards to . Furthermore, the chemical composition appears to be a pivotal factor in the onset of these effects. It can therefore be stated that PS is not a suitable standard for representing the toxicity of all plastics.
本研究的目的是评估长期暴露（21天）于环境相关浓度（10微克/升）的两种不同纳米塑料（NP）聚合物对水生模式生物的影响。本研究考察了暴露于200纳米聚苯乙烯纳米塑料（PS-NPs）和聚氯乙烯纳米塑料（PVC-NPs）的影响，后者的平均尺寸与PS-NPs相似（范围为50纳米至350纳米）。评估了聚合物暴露对形态参数、蜕皮次数、游泳行为和繁殖结果的影响。研究结果表明，暴露于PVC会导致体型增大，而两种聚合物都会导致蜕皮行为增加。此外，暴露于PVC-NPs对[生物名称]的繁殖有负面影响，表现为首次产卵日延迟、后代总数减少，进而导致种群增长率放缓。据推测，[生物名称]摄入PVC-NPs可能导致蜕皮激素功能受损，而蜕皮事件增加可能代表对PVC-NP附着于生物体体表的负面影响的一种适应性反应。这两种生物的反应可能共同解释了观察到的影响。本研究确定了暴露于PVC-NPs导致的健康损害，这可能会导致相关的生态后果。对两种聚合物诱导的影响进行的比较分析揭示了对[生物名称]产生的不同危害。此外，化学成分似乎是这些影响发生的关键因素。因此可以说，PS不是代表所有塑料毒性的合适标准。
