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Title: Impact of bio-palladium nanoparticles (bio-Pd NPs) on the activity and structure of a marine microbial community
Authors: Nuzzo, Andrea
Boon, Nico
Zanaroli, Giulio
Fava, Fabio
Issue Date: 2017
Source: ENVIRONMENTAL POLLUTION, 220, p. 1068-1078
Abstract: Biogenic palladium nanoparticles (bio-Pd NPs) represent a promising catalyst for organohalide reme-diation in water and sediments. However, the available information regarding their possible impact in case of release into the environment, particularly on the environmental microbiota, is limited. In this study the toxicity of bio-Pd NPs on the model marine bacterium V. fischeri was assessed. The impacts of different concentrations of bio-Pd NPs on the respiratory metabolisms (i.e. organohalide respiration, sulfate reduction and methanogenesis) and the structure of a PCB-dechlorinating microbial community enriched form a marine sediment were also investigated in microcosms mimicking the actual sampling site conditions. Bio-Pd NPs had no toxic effect on V. fischeri. In addition, they had no significant effects on PCB-dehalogenating activity, while showing a partial, dose-dependent inhibitory effect on sulfate reduction as well as on methanogenesis. No toxic effects by bio-Pd NPs could be also observed on the total bacterial community structure, as its biodiversity was increased compared to the not exposed community. In addition, resilience of the microbial community to bio-Pd NPs exposure was observed, being the final community organization (Gini coefficient) of samples exposed to bio-Pd NPs similar to that of the not exposed one. Considering all the factors evaluated, bio-Pd NPs could be deemed as nontoxic to the marine microbiota in the conditions tested. This is the first study in which the impact of bio-Pd NPs is extensively evaluated over a microbial community in relevant environmental conditions, providing important information for the assessment of their environmental safety. (C) 2016 Elsevier Ltd. All rights reserved.
Notes: [Nuzzo, Andrea; Zanaroli, Giulio; Fava, Fabio] Univ Bologna, Dept Civil Chem Environm & Mat Engn, Via Terracini 28, I-40131 Bologna, Italy. [Hosseinkhani, Baharak; Boon, Nico] Univ Ghent, CMET, Coupure Links 653, B-9000 Ghent, Belgium. [Hosseinkhani, Baharak] Hasselt Univ, Biomed Res Inst, Martelarenlaan 42, B-3500 Hasselt, Belgium.
Keywords: Bio-Pd NPs; Nanoparticles; Ecotoxicity; Marine sediment; Bacterial community structure;bio-Pd NPs; nanoparticles; ecotoxicity; marine sediment; bacterial community structure
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ISSN: 0269-7491
e-ISSN: 1873-6424
DOI: 10.1016/j.envpol.2016.11.036
ISI #: 000390732300035
Rights: © 2016 Elsevier Ltd. All rights reserved.
Category: A1
Type: Journal Contribution
Validations: ecoom 2018
Appears in Collections:Research publications

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