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首页> 外文期刊>Environmental toxicology and chemistry >Effects of Silver Nitrate Are a Conservative Estimate for the Effects of Silver Nanoparticles on Algae Growth and Daphnia magna Reproduction
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Effects of Silver Nitrate Are a Conservative Estimate for the Effects of Silver Nanoparticles on Algae Growth and Daphnia magna Reproduction

机译：硝酸银的影响是银纳米颗粒对藻类生长和水蚤繁殖的影响的保守估计。

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Silver (Ag) salts have been shown to be highly toxic to freshwater organisms. There is nevertheless still a high level of uncertainty as to the aquatic effects of Ag nanoparticles (AgNPs), and how these relate to the effects of soluble Ag salts. As part of the substance evaluation for Ag of the European Union Registration, Evaluation, Authorisation, and Restriction of Chemicals regulation, we have generated new data to justify read-across from soluble Ag salts to AgNPs. The aquatic toxicity to algae growth and Daphnia magna reproduction, fate, and behavior of AgNO3 versus AgNPs were tested and compared. Chloride salts in the test media were replaced with equimolar concentrations of nitrate salts. Total Ag, "conventionally" dissolved Ag (0.45 mu m), and "truly" dissolved Ag (3 kDa) were determined. Algae were the most sensitive test species to AgNO3 (10% effect concentration [EC10] 0.10 mu g Ag/L) when expressed as conventionally dissolved Ag. The corresponding value for AgNPs was 0.26 mu g/L. For D. magna reproduction, the lowest EC10 values were 3.49 mu g Ag/L for AgNO3 and 33.4 mu g Ag/L for AgNPs. Using measured Ag concentrations, AgNO3 was experimentally shown to be more toxic than AgNPs for all Ag fractions. We explain these observations by a different dissolution behavior of AgNO3 versus AgNPs. The results provide experimental confirmation that AgNO3 can be used as a conservative estimate for the aquatic effects of AgNPs at comparable Ag concentrations. Environ Toxicol Chem 2019;38:1701-1713. (c) 2019 SETAC
机译：银（Ag）盐已被证明对淡水生物有剧毒。然而，关于银纳米颗粒（AgNPs）的水生作用以及它们与可溶性银盐的作用之间的关系仍存在高度不确定性。作为欧盟注册，评估，授权和化学品限制法规中Ag物质评估的一部分，我们已经产生了新数据，以证明从可溶性Ag盐到AgNPs的全面读取是合理的。测试和比较了水藻对藻类生长和大型蚤（Daphnia magna）繁殖，命运以及AgNO3与AgNPs行为的毒性。用等摩尔浓度的硝酸盐代替测试介质中的氯盐。测定总的Ag，“常规地”溶解的Ag（0.45μm）和“真正地”溶解的Ag（3kDa）。当以常规溶解的Ag表示时，藻类是对AgNO3（10％的有效浓度[EC10] 0.10μg Ag / L）最敏感的测试物种。 AgNPs的相应值为0.26μg/ L。对于D. magna繁殖，最低的EC10值对于AgNO3为3.49微克Ag / L，对于AgNP为33.4微克Ag / L。使用测得的Ag浓度，实验证明，对于所有Ag组分，AgNO3的毒性都比AgNPs高。我们通过AgNO3与AgNPs的不同溶解行为来解释这些观察结果。结果提供了实验证实，AgNO3可以用作可比较的Ag浓度下AgNPs的水生作用的保守估计。 Environ Toxicol Chem 2019; 38：1701-1713。 （c）2019年SETAC

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