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The shape and speciation of Ag nanoparticles drive their impacts on organisms in a lotic ecosystem
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-09-16 , DOI: 10.1039/d0en00442a M. Auffan 1, 2, 3, 4, 5 , C. Santaella 2, 6, 7, 8, 9 , L. Brousset 2, 3, 10, 11, 12 , M. Tella 13, 14, 15, 16, 17 , E. Morel 1, 2, 3, 4, 5 , P. Ortet 2, 6, 7, 8, 9 , M. Barakat 2, 6, 7, 8, 9 , C. Chaneac 2, 16, 18, 19, 20 , J. Issartel 2, 3, 10, 11, 12 , B. Angeletti 1, 2, 3, 4, 5 , C. Levard 1, 2, 3, 4, 5 , J.-L. Hazemann 2, 16, 21, 22, 23 , M. Wiesner 24, 25, 26, 27 , J. Rose 1, 2, 3, 4, 5 , A. Thiéry 2, 3, 10, 11, 12 , J.-Y. Bottero 1, 2, 3, 4, 5
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-09-16 , DOI: 10.1039/d0en00442a M. Auffan 1, 2, 3, 4, 5 , C. Santaella 2, 6, 7, 8, 9 , L. Brousset 2, 3, 10, 11, 12 , M. Tella 13, 14, 15, 16, 17 , E. Morel 1, 2, 3, 4, 5 , P. Ortet 2, 6, 7, 8, 9 , M. Barakat 2, 6, 7, 8, 9 , C. Chaneac 2, 16, 18, 19, 20 , J. Issartel 2, 3, 10, 11, 12 , B. Angeletti 1, 2, 3, 4, 5 , C. Levard 1, 2, 3, 4, 5 , J.-L. Hazemann 2, 16, 21, 22, 23 , M. Wiesner 24, 25, 26, 27 , J. Rose 1, 2, 3, 4, 5 , A. Thiéry 2, 3, 10, 11, 12 , J.-Y. Bottero 1, 2, 3, 4, 5
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Silver nanomaterials with different shapes (spheres, plates, wires, rods, cubes) are valued by industries and scientists for their shape-dependent properties which make them useful for diverse applications. In a safer-by-design perspective, controlling the shape of Ag nanomaterials could be an option to increase their properties while lowering either their hazard or their exposure potentials. Nine indoor aquatic mesocosms reproducing a lotic ecosystem were contaminated with chronic low-level additions of Ag nanospheres (Sp-Ag) and nanoplates (Pl-Ag) for a month. A shape-dependent impact under such environmentally relevant exposure conditions was observed. Pl-Ag induced a moderate oxidative stress in adult Gammarus fossarum (after molting) and a hormesis effect on planktonic microbial communities, while Sp-Ag had no effect. In an environmental risk perspective, our results highlight which ecological niches of a lotic ecosystem would be more impacted by Pl-Ag: (i) >72% of the total Ag was found fully sulfidized in surficial sediment and had only a moderate impact on benthic macro-organisms, (ii) only 11% to 15% of the Ag remained in the water column after 1 month, but Ag was under a more reactive speciation that impacts the planktonic community.
中文翻译：
Ag纳米颗粒的形状和形态驱动其对有机生态系统中生物的影响
具有不同形状（球，板，线，杆，立方体）的银纳米材料因其与形状有关的特性而受到行业和科学家的重视，从而使其可用于多种应用。从更安全的设计角度来看，控制Ag纳米材料的形状可能是增加其性能，同时降低其危险性或暴露潜力的一种选择。九个繁殖出大量生态系统的室内水生介体被一个月的长期低水平添加的Ag纳米球（Sp-Ag）和纳米板（Pl-Ag）污染。在这种与环境有关的暴露条件下，观察到形状依赖性的影响。Pl-Ag诱导成年γ-牙本质中度氧化应激（蜕皮后）和对浮游微生物群落的兴奋作用，而Sp-Ag无作用。从环境风险的角度来看，我们的结果突出表明，Pl-Ag对水生生态系统的哪些生态位会产生更大的影响：（i）发现> 72％的总Ag在表层沉积物中被完全硫化，对底栖生物的影响中等（ii）1个月后，只有11％至15％的Ag留在水柱中，但是Ag的反应性更高，会影响浮游生物。
更新日期：2020-10-17
中文翻译：
Ag纳米颗粒的形状和形态驱动其对有机生态系统中生物的影响
具有不同形状（球，板，线，杆，立方体）的银纳米材料因其与形状有关的特性而受到行业和科学家的重视，从而使其可用于多种应用。从更安全的设计角度来看，控制Ag纳米材料的形状可能是增加其性能，同时降低其危险性或暴露潜力的一种选择。九个繁殖出大量生态系统的室内水生介体被一个月的长期低水平添加的Ag纳米球（Sp-Ag）和纳米板（Pl-Ag）污染。在这种与环境有关的暴露条件下，观察到形状依赖性的影响。Pl-Ag诱导成年γ-牙本质中度氧化应激（蜕皮后）和对浮游微生物群落的兴奋作用，而Sp-Ag无作用。从环境风险的角度来看，我们的结果突出表明，Pl-Ag对水生生态系统的哪些生态位会产生更大的影响：（i）发现> 72％的总Ag在表层沉积物中被完全硫化，对底栖生物的影响中等（ii）1个月后，只有11％至15％的Ag留在水柱中，但是Ag的反应性更高，会影响浮游生物。
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