FN Archimer Export Format
PT J
TI Surface functionalization determines behavior of nanoplastic solutions in model aquatic environments
BT 
AF Tallec, Kevin
   Blard, Océane
   González-Fernández, Carmen
   Brotons, Guillaume
   Berchel, Mathieu
   Soudant, Philippe
   Huvet, Arnaud
   Paul-Pont, Ika
AS 1:1;2:2;3:2;4:3;5:4;6:5;7:1;8:5;
FF 1:PDG-RBE-PFOM;2:;3:;4:;5:;6:;7:PDG-RBE-PFOM-LPI;8:;
C1 Ifremer, Laboratoire des Sciences de l’Environnement Marin (LEMAR), UMR 6539 UBO/CNRS/IRD/Ifremer, CS 10070, 29280, Plouzané, France
   Laboratoire des Sciences de l’Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/Ifremer, Institut Universitaire Européen de la Mer, Technopôle Brest-Iroise, Rue Dumont d’Urville, 29280, Plouzané, France
   Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Le Mans Université, 72085, Le Mans, France
   Université de Brest, Université Européenne de Bretagne, CNRS UMR 6521, CEMCA, IFR 148 ScInBios, 6 Avenue Victor Le Gorgeu, 29238, Brest, France
C2 IFREMER, FRANCE
   UBO, FRANCE
   UNIV LE MANS, FRANCE
   UBO, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-RBE-PFOM
   PDG-RBE-PFOM-LPI
UM LEMAR
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 5.778
TC 95
UR https://archimer.ifremer.fr/doc/00485/59652/62684.pdf
LA English
DT Article
DE ;Nanoplastic;Dynamic light scattering;Behavior;Aggregation;Salinity;Organic matter
AB Plastic debris are classified as a function of their size and recently a new class was proposed, the nanoplastics. Nano-sized plastics have a much greater surface area to volume ratio than larger particles, which increases their reactivity in aquatic environment, making them potentially more toxic. Only little information is available about their behavior whereas it crucially influences their toxicity. Here, we used dynamic light scattering (DLS) to explore the influence of environmental factors (fresh- and saltwater, dissolved organic matter) on the behavior (surface charge and aggregation state) of three different nano-polystyrene beads (50 nm), with (i) no surface functionalization (plain), (ii) a carboxylic or (iii) an amine functionalization. Overall, the positive amine particles were very mildly affected by changes in environmental factors with no effect of the salinity gradient (from 0 to 653 mM) and of a range 1–30 μg.L−1 and 1–10 μg.L−1 of organic matter in artificial seawater and ultrapure water, respectively. These observations are supposedly linked to a coating specificity leading to repulsive mechanisms. In contrast, the stability of the negatively charged carboxylic and plain nanobeads was lost under an increasing ionic strength, resulting in homo-aggregation (up to 10 μm). The increase in organic matter content had negligible effect on these two nanobeads. Analysis performed over several days demonstrated that nanoplastics formed evolving dynamic structures detected mainly with an increase of the homo-aggregation level. Thus, surface properties of given polymers/particles are expected to influence their fate in complex and dynamic aquatic environments. 
PY 2019
PD JUL
SO Chemosphere
SN 0045-6535
PU Elsevier BV
VL 225
UT 000467668500069
BP 639
EP 646
DI 10.1016/j.chemosphere.2019.03.077
ID 59652
ER

EF