College of Animal Sciences, Zhejiang University, Hangzhou, P.R. China.
Sci Rep. 2019 Mar 5;9(1):3516. doi: 10.1038/s41598-019-40047-1.
Large amounts of anthropogenic CO in the atmosphere are taken up by the ocean, which leads to 'ocean acidification' (OA). In addition, the increasing application of nanoparticles inevitably leads to their increased release into the aquatic environment. However, the impact of OA on the bioaccumulation of nanoparticles in marine organisms still remains unknown. This study investigated the effects of OA on the bioaccumulation of a model nanoparticle, titanium dioxide nanoparticles (nTiO), in three edible bivalves. All species tested accumulated significantly greater amount of nTiO in pCO-acidified seawater. Furthermore, the potential health threats of realistic nTiO quantities accumulated in bivalves under future OA scenarios were evaluated with a mouse assay, which revealed evident organ edema and alterations in hematologic indices and blood chemistry values under future OA scenario (pH at 7.4). Overall, this study suggests that OA would enhance the accumulation of nTiO in edible bivalves and may therefore increase the health risk for seafood consumers.
大气中大量人为产生的二氧化碳被海洋吸收，这导致了“海洋酸化”（OA）。此外，纳米颗粒的应用日益增加，不可避免地导致它们更多地释放到水生环境中。然而，海洋酸化对海洋生物中纳米颗粒的生物累积的影响仍不清楚。本研究调查了海洋酸化对三种可食用双壳类动物中模型纳米颗粒，二氧化钛纳米颗粒（nTiO）的生物累积的影响。所有测试的物种在 pCO 酸化海水中积累了明显更多的 nTiO。此外，通过小鼠试验评估了在未来 OA 情景下双壳类动物中积累的实际 nTiO 数量的潜在健康威胁，该试验显示在未来 OA 情景（pH 值为 7.4）下，器官水肿和血液学指标及血液化学值的改变。总的来说，本研究表明，海洋酸化会增强可食用双壳类动物中 nTiO 的累积，从而增加海鲜消费者的健康风险。
