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首页> 外文期刊>The Science of the Total Environment >Joint effects of zinc oxide nanoparticles and chlorpyrifos on the reproduction and cellular stress responses of the earthworm Eisenia andrei
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Joint effects of zinc oxide nanoparticles and chlorpyrifos on the reproduction and cellular stress responses of the earthworm Eisenia andrei

机译：氧化锌纳米颗粒和毒死rif对onEisenia andrei繁殖和细胞应激反应的联合作用

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The co-exposure of soil organisms to ZnO nanoparticles (ZnO NPs) and pesticides is likely to take place in agricultural soils.However, the impacts of co-exposure on terrestrial ecosystems are virtually unknown. In this paper, Eisenia andrei was exposed for a 28-day period to serial concentrations of ZnO NPs and/or the organophosphate insecticide chlorpyrifos (CPF) in natural soil, and was evaluated for single and joint effects. Zn and CPF accumulation in earthworm tissue was also determined. In the single assay, ZnO NPs and CPF caused statistical significant effects on survival and growth, but mainly on reproduction.Significant reductions in fecundity and fertility were detected with EC50 values of 278 and 179 mg Zn/kg for ZnO NPs, and of 50.75 and 38.24 mg/kg for CPF, respectively. The most notable effect on biomarkers was the reduction in acetylcholinesterase (AChE) activity caused by CPF, which reflected the neurotoxicity of this compound. The results of the combined assay indicated that co-exposure to ZnO NPs and CPF increased adverse effects in E. andrei. According to the independent action model, the binary mixtures showed a synergism (a stronger effect than expected from single exposures) on earthworm reproduction, which became up to 84% higher than the theoretically predicted values. Zn, and especially CPF accumulation, were influenced by the co-exposure. These results underpin the need to consider the effects of mixtures of NPs and organic chemicals on soil to adequately make ecological risk assessments of NPs. Published by Elsevier B.V.
机译：土壤有机物与ZnO纳米颗粒（ZnO NPs）和杀虫剂的共同暴露很可能发生在农业土壤中，但是共同暴露对陆地生态系统的影响实际上是未知的。在本文中，Eisenia andrei暴露于自然土壤中一系列浓度的ZnO NPs和/或有机磷酸盐杀虫剂毒死rif（CPF）28天，并评估了其单次和联合效应。还测定了tissue组织中锌和CPF的积累。在单次测定中，ZnO NP和CPF对存活和生长产生统计学上的显着影响，但主要对繁殖产生影响。检测到的繁殖力和繁殖力显着降低，ZnO NP的EC50值分别为278和179 mg Zn / kg，分别为50.75和0.75 mg / kg。 CPF分别为38.24 mg / kg。对生物标志物最显着的影响是CPF引起的乙酰胆碱酯酶（AChE）活性降低，这反映了该化合物的神经毒性。联合测定的结果表明，ZnO NPs和CPF的共同暴露增加了对E. andrei的不利影响。根据独立作用模型，二元混合物对earth的繁殖表现出协同作用（比单次暴露预期的效果要强），比理论值高84％。锌，尤其是CPF的积累受共同暴露的影响。这些结果强调了需要考虑NP和有机化学物质的混合物对土壤的影响，以便对NP进行生态风险评估。由Elsevier B.V.发布

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