东南大学学报（英文版）2018，Vol.34Issue(2)：269-275,7.DOI:10.3969/j.issn.1003-7985.2018.02.017
凤眼莲水培系统中纳米银的迁移转化
Migration of silver nanoparticles in an aquatic system with Eichhornia crassipes
摘要
Abstract
The migration and dissolution of AgNPs in an aquatic system with plants was investigated. By using a hydroponic system with Eichhornia crassipes, the absorption and transportation processes of silver nanoparticles were investigated. The results show that AgNPs concentrations in the water phase declined with the increase in time, and the reduction degree was dependent on the initial concentrations of AgNPs. The silver concentrations in the roots ( r=0. 98, p＜0. 05) , stems and leaves ( r=1, p＜0. 001) were significantly positively correlated with the initial concentrations of AgNPs. Silver nanoparticles accumulated in plant roots more than stems and leaves. Compared with the addition of AgNO3at identical concentrations, lower removal rates of silver and plant uptake were observed in the AgNPs stress systems. A significant positive correlation was also found between the initial AgNPs concentrations and the removed amount of silver ( r=0. 99, p ＜0. 001 ) . For AgNPs, the primary removal mechanisms in these aquatic systems were agglomeration and sedimentation, while the absorption by plants had a relatively weak contribution.关键词
纳米银/水培系统/迁移/沉淀/植物吸收Key words
silver nanoparticles/aquatic system/migration/sedimentation/plant uptake分类
资源环境引用本文复制引用
曹冲,黄娟,胡谦,蔡文舒..凤眼莲水培系统中纳米银的迁移转化[J].东南大学学报（英文版）,2018,34(2):269-275,7.基金项目
The National Natural Science Foundation of China ( No. 51479034, 5151101102 ) , Fundamental Research Funds for the Central Universities ( No. 2242016R30008) . （ No. 51479034, 5151101102 ）
