《Tab.1Absorption and transportation of Ag NPs in different hydroponic systems》

  提示：宽带有限、当前游客访问压缩模式

本系列图表出处文件名：随高清版一同展现

《凤眼莲水培系统中纳米银的迁移转化（英文）》

1. 获取 高清版本忘记账户？点击这里登录

1. 下载图表忘记账户？点击这里登录

μg

As show n in Tab.2，the removal efficiencies of silver decreased w ith the increase in initial Ag NP concentrations，w hich demonstrated that a saturation ratio w as reached to remove Ag NPs in these systems.The reason is that the plants limited the absorption capacity to remove the Ag NPs and high concentrations of Ag NPs might stimulate plant roots to produce exudates that affected the precipitation and aggregation of Ag NPs[22].Within the tested Ag NPs concentrations in this study，the percentage of silver removed by plant uptake w as the highest at the initial Ag NPs concentration of 93.3μg/L.The decrease of plant uptake might be explained by oxidative stress caused by Ag NPs，w hich might destroy membrane permeability[25]and cell w alls[23].Due to the aggregation at high concentrations of Ag NPs，the plant cell w all and membrane might have clogged[24]，w hich can also limit absorption by plants.As also show n in Tab.2，settlement and reunion is a dominant mechanism for the removal of Ag NPs in the hydroponic systems.By comparison，the plant absorption of Ag NPs is relatively w eak.