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设计上安全和可持续的Ag纳米材料:使用无脊椎动物土壤模型评估环境中的生物反应性的案例研究

Susana I L Gomes¹, Ilaria Zanoni², Magda Blosi²

¹Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.

The Science of the total environment

|March 22, 2024

概括

安全和可持续的设计 (SSbD) 银纳米材料 (Ag NMs) 在土壤生物中对生态有毒性进行了评估. 乙纤维素涂层的Ag NMs (AgHEC) 在土壤水提取物中显示出比其他银形式更高的毒性和生物可用性.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
纳米材料的安全性

背景情况:

安全和可持续的设计 (SSbD) 纳米材料 (NM) 对环境保护至关重要.
银纳米材料 (Ag NMs) 越来越多地用于各种应用,需要对生态毒性进行评估.
了解Ag NMs的环境命运和影响至关重要,因为它们可能释放.

研究的目的:

评估SSbD Ag NM (AgHEC) 对土壤生物Enchytraeus crypticus的生态毒性.
为了比较AgHEC与裸体Ag NMs (Ag-Sigma),生物医学产品 (PLLA-Ag) 和酸银 (AgNO3) 的毒性.
研究不同介质 (水,土壤:水提取物,土壤) 对Ag NM毒性和生物可用性的影响.

主要方法:

使用Enchytraeus crypticus进行Ag NMs的生态毒性测试,遵循经合组织的指导方针 (土壤28天,土壤延伸56天,水脉冲5天).
在测试前和测试期间对Ag材料的表征,包括水力动力学尺寸和悬浮稳定性.
评价生物体对Ag的吸收和复制水中的毒性,土壤:水提取物和土壤.

主要成果:

与Ag-Sigma (150倍) 和PLLA-Ag (2.5倍) 相比,AgHEC在土壤:水提取物中表现出明显更高的毒性.
与AgHEC一起观察到更高的Ag吸收,与较小的水力动力学尺寸和更大的悬浮稳定性相关.
毒性与物理化学性质有关,表明Ag NMs的可预测生物活性.
在各种媒体复杂度 (从水到土壤) 的测试为结果解释提供了宝贵的见解.

结论:

SSbD Ag NMs的生态毒性取决于它们的物理化学特性和环境介质.
AgHEC在土壤中的增强生物可用性:水提取物导致对Enchytraeus crypticus的毒性增加.
建议在介质复杂性的梯度上进行测试,以对NMS进行全面的生态毒性评估.

关键词:

先进的材料先进的材料.生物医学应用程序危险评估危险评估危险评估非目标物种非目标物种.设计中的安全和可持续性 (SSbD)土壤土壤土壤.

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