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题名: Removal and fate of silver nanoparticles in lab-scale vertical flow constructed wetland
作者: Bao, Shaopan1; Liang, Lei1, 2; Huang, Jiaolong1, 2; Liu, Xiawei1, 2; Tang, Wei1; Yi, Jia3; Fang, Tao1, 2
关键词: Environmental fate ; Hydraulic loading rates ; Removal efficiency ; Substrate adsorption ; Wetland plant
刊名: CHEMOSPHERE
发表日期: 2019
DOI: 10.1016/j.chemosphere.2018.09.110
卷: 214, 页:203-209
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Engineered nanomaterials (ENMs) are increasingly produced and consequently released into the environment. Therefore, there is a strong need to find a valid way to treat the ENMs pollution. In this study, the removal efficiencies of silver nanoparticles (AgNPs) from synthetic wastewater in lab-scale vertical flow constructed wetland (CW) systems with different operations (plant, hydraulic loading rates, bed depth) were investigated. Moreover, the environmental fate and impacts of AgNPs in CWs were also investigated. The results showed that CWs with plants were more effective in removing AgNPs than the unplanted CWs. Hydraulic loading had a significant effect on the performance of CWs in treating AgNPs, however, the influence of bed depth was negligible. AgNPs stopped in the CWs were mainly resided in the wetland substrate, indicating the main mechanism of AgNPs removal in CWs was through substrate adsorption. Although plant biomass, root activity, peroxidase activity of leaves and biofilm biomass were significantly altered following exposure to AgNPs (P < 0.05), CWs maintained constant high efficiency (63.2-93.8%) in removing AgNPs from wastewater during a continuous 2-month running. Overall, this paper suggests the feasibility and high-efficiency of using CWs to handle AgNPs contamination. (C) 2018 Elsevier Ltd. All rights reserved.
关键词[WOS]: WASTE-WATER TREATMENT ; ENGINEERED NANOPARTICLES ; POLLUTANT REMOVAL ; PLANT-GROWTH ; TOXICITY ; SYSTEM ; ACCUMULATION ; COMMUNITIES ; PERFORMANCE ; NANOSILVER
语种: 英语
项目资助者: National Natural Science Foundation of China(21477159)
WOS记录号: WOS:000449891300024
ISSN号: 0045-6535
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/56074
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Hubei Prov Ctr Dis Control & Prevent, Wuhan 430072, Hubei, Peoples R China
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