期刊
MARINE POLLUTION BULLETIN
卷 119, 期 1, 页码 176-183出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.03.052
关键词
Silver; Silver nanoparticles; Phytoremediation; Bacterial community structure; Remediation of ecosystems
资金
- Strategic Funding through national funds provided by FCT - Foundation for Science and Technology and European Regional Development Fund (ERDF) [UID/Multi/04423/2013]
- structured Program of R&D&I INNOVMAR - Innovation and Sustainability in the Management and Exploitation of Marine Resources [NORTE-01-0145-FEDER-000035]
- Northern Regional Operational Programme (NORTE), through the European Regional Development Fund (ERDF)
- FCT [SFRH/BD/112154/2015]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/112154/2015] Funding Source: FCT
This study investigated the uptake of silver nanoparticles (AgNPs) by a salt marsh plant, Phragmites australis, as well as AgNPs effects on rhizospheric microbial community, evaluating the implications for phytoremediation processes. Experiments were carried out with elutriate solution doped with Ag, either in ionic form or in NP form. Metal uptake was evaluated in plant tissues, elutriate solutions and sediments (by AAS) and microbial community was characterized in terms of bacterial community structure (evaluated by ARISA). Results showed Ag accumulation but only in plant belowground tissues and only in the absence of rhizosediment, the presence of sediment reducing Ag availability. But in plant roots Ag accumulation was higher when Ag was in NP form. Multivariate analysis of ARISA profiles showed significant effect of the absence/presence of Ag either in ionic or NP form on microbial community structure, although without significant differences among bacterial richness and diversity. Overall, P. australis can be useful for phytoremediation of medium contaminated with Ag, including with AgNPs. However, the presence of Ag in either forms affected the microbial community structure, which may cause disturbances in ecosystems function and compromise phytoremediation processes. Such considerations need to be address regarding environmental management strategies applied to the very important estuarine areas. Capsule: The form in which the metal was added affected metal uptake by Phragmites australis and rhizosediment microbial community structure, which can affect phytoremediation. (C) 2017 Elsevier Ltd. All rights reserved.
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