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首页> 外文期刊>Environmental toxicology and chemistry >EFFECTS OF SILVER NANOPARTICLES (NM-300K) ON LUMBRICUS RUBELLUS EARTHWORMS AND PARTICLE CHARACTERIZATION IN RELEVANT TEST MATRICES INCLUDING SOIL
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EFFECTS OF SILVER NANOPARTICLES (NM-300K) ON LUMBRICUS RUBELLUS EARTHWORMS AND PARTICLE CHARACTERIZATION IN RELEVANT TEST MATRICES INCLUDING SOIL

机译：银纳米颗粒（NM-300K）对土壤中相关试验基质中黑褐土和颗粒特性的影响

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摘要

The impact of silver nanoparticles (AgNP; at 0 mg Ag/kg, 1.5 mg Ag/kg, 15.4 mg Ag/kg, and 154 mg Ag/kg soil) and silver nitrate (AgNO_3; 15.4 mg Ag/kg soil) on earthworms, Lumbricus rubellus, was assessed. A 4-wk exposure to the highest AgNP treatment reduced growth and reproduction compared with the control. Silver nitrate (AgNO_3) exposure also impaired reproduction, but not as much as the highest AgNP treatment. Long-term exposure to the highest AgNP treatment caused complete juvenile mortality. All AgNP treatments induced tissue pathology. Population modeling demonstrated reduced population growth rates for the AgNP and AgNO_3 treatments, and no population growth at the highest AgNP treatment because of juvenile mortality. Analysis of AgNP treated soil samples revealed that single AgNP and AgNP clusters were present in the soil, and that the total Ag in soil porewater remained high throughout the long-term experiment. In addition, immune cells (coelomocytes) of earthworms showed sensitivity to both AgNP and AgNO_3 in vitro. Overall, the present study indicates that AgNP exposure may affect earthworm populations and that the exposure may be prolonged because of the release of a dissolved Ag fraction to soil porewater.
机译：纳米银颗粒（AgNP； 0 mg Ag / kg，1.5 mg Ag / kg，15.4 mg Ag / kg和154 mg Ag / kg土壤）和硝酸银（AgNO_3； 15.4 mg Ag / kg土壤）对earth的影响，Lumbricus rubellus，进行了评估。与对照组相比，最高AgNP处理量的4周暴露降低了生长和繁殖。硝酸银（AgNO_3）的暴露也会损害繁殖，但不如最高的AgNP处理那么多。长期暴露于最高的AgNP治疗会导致青少年完全死亡。所有AgNP治疗均可诱发组织病理。人口模型显示，AgNP和AgNO_3处理降低了人口增长率，并且由于少年死亡率，在最高AgNP处理下没有人口增长。对经过AgNP处理的土壤样品的分析表明，土壤中存在单个AgNP和AgNP簇，并且在整个长期实验中，土壤孔隙水中的总Ag仍然很高。此外，earth的免疫细胞（粒细胞）在体外对AgNP和AgNO_3均表现出敏感性。总体而言，本研究表明，AgNP暴露可能会影响worm种群，并且由于溶解的Ag组分释放到土壤孔隙水中，暴露时间可能会延长。

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