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在河口植物中吸收含银纳米颗粒:物种化和生物积累

Zuoshun Niu¹, Miao Xu¹, Xingpan Guo¹

¹Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.

Environmental science & technology

|October 16, 2023

概括

银纳米粒子 (Ag-NPs) 在河口植物中的生物积累受水化学和微生物活动的影响. 盐度和硫酸盐降低细菌影响Ag-NP转化和植物吸收,影响环境风险.

科学领域:

环境科学环境科学
纳米技术纳米技术
生态毒理学生态毒理学

背景情况:

银纳米颗粒 (Ag-NP) 在河口植物中的生物积累对于环境风险评估至关重要.
在复杂的河口环境中了解Ag-NP的行为需要对它们的物种和植物相互作用进行调查.

研究的目的:

研究潮水,沉积物和河口植物Scirpus triqueter中的Ag-NPs (Ag0-NPs和Ag+) 的分布和转化.
确定环境因素,如盐度和微生物活动对Ag-NP物种化和植物生物积累的影响.

主要方法:

在实地构建的中宇宙实验中, *Scirpus triqueter* 在环境相关的度下暴露于Ag⁰-NPs和Ag⁺.
使用选择性溶解和单颗粒感应合等离子体质谱法分析Ag-NP粒子数度 (PNCs) 和大小.
统计建模 (随机森林,结构方程模型) 来评估环境参数和Ag-NP积累之间的关系.

主要成果:

Ag0-NP在很大程度上溶解为Ag+,一些Ag+在潮水中转化为Ag0-/AgCl-NP.
植物组织中的Ag-NP物种化有所不同:金属Ag在暴露于Ag0-NP的茎中占主导地位,而Ag2S-NP在暴露于Ag+的根和茎中占主导地位.
植物茎比根更富含Ag-NP;盐度间接调节茎中的Ag-NPPNC,硫酸盐减少细菌增强了Ag-NP根的生物积累.

结论:

盐度和硫酸盐降低细菌在调节河口生态系统中的Ag-NP转化和生物积累方面发挥着重要作用.
银纳米颗粒在植物中的物种化取决于初始暴露形式 (Ag0-NP与Ag+) 和环境条件.
河口植物可以积累Ag-NP,其积累模式受到植物部分和环境因素的影响,突出显示了潜在的生态风险.

关键词:

斯基普斯 (Scirpus) 的三角体.生物积累的生物积累这是一个mesocosm.含有银的纳米颗粒.减少硫酸盐的细菌减少硫酸盐的细菌

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