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首页> 美国卫生研究院文献>Scientific Reports >Ocean acidification increases the accumulation of titanium dioxide nanoparticles (nTiO2) in edible bivalve mollusks and poses a potential threat to seafood safety
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Ocean acidification increases the accumulation of titanium dioxide nanoparticles (nTiO2) in edible bivalve mollusks and poses a potential threat to seafood safety

机译：海洋酸化增加了食用双壳贝类软体动物中二氧化钛纳米颗粒（nTiO2）的积累并对海鲜安全构成了潜在威胁

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Large amounts of anthropogenic CO2 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 (nTiO2), in three edible bivalves. All species tested accumulated significantly greater amount of nTiO2 in pCO2-acidified seawater. Furthermore, the potential health threats of realistic nTiO2 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 nTiO2 in edible bivalves and may therefore increase the health risk for seafood consumers.
机译：海洋吸收了大气中大量的人为二氧化碳，导致“海洋酸化”（OA）。另外，纳米颗粒的增加应用不可避免地导致它们向水生环境中的释放增加。但是，OA对海洋生物中纳米颗粒生物积累的影响仍然未知。这项研究调查了OA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（nTiO2）的生物蓄积的影响。测试的所有物种在pCO2酸化的海水中积累了大量的nTiO2。此外，使用小鼠试验评估了未来OA情况下双壳类动物体内实际nTiO2含量的潜在健康威胁，并通过小鼠试验进行了评估，结果显示在未来OA情况下（pH值为7.4）明显的器官水肿以及血液学指标和血液化学值的变化。总体而言，这项研究表明，OA将增加可食用双壳类动物体内nTiO2的积累，因此可能增加海鲜消费者的健康风险。

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