The toxicity of coated silver nanoparticles to Daphnia carinata and trophic transfer from alga Raphidocelis subcapitata.
Animals
Aquatic Organisms
/ drug effects
Catechin
/ analogs & derivatives
Chlorophyceae
/ drug effects
Curcumin
/ chemistry
Daphnia
/ drug effects
Ecosystem
Fresh Water
Humans
Ligands
Metal Nanoparticles
/ chemistry
Silver
/ chemistry
Silver Nitrate
/ chemistry
Surface Properties
Tyrosine
/ chemistry
Water Pollutants, Chemical
/ chemistry
Journal
PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081
Informations de publication
Date de publication:
2019
2019
Historique:
received:
19
10
2018
accepted:
12
03
2019
entrez:
4
4
2019
pubmed:
4
4
2019
medline:
20
12
2019
Statut:
epublish
Résumé
Nanoparticles (NPs) are causing threats to the environment. Silver NPs (AgNPs) are increasingly used in commercial products and may end up in freshwater ecosystems. The freshwater organisms are vulnerable due to water-borne and dietary exposure to AgNPs. Surface properties play an important role in the fate and behavior of AgNPs in the aquatic environment and their effects on organisms. However, effects of surface properties of AgNPs on organisms are poorly understood. In this study, we explored the effects of AgNPs coated with three different ligands; Tyrosine (T-AgNP), Epigallocatechin gallate (E-AgNP) and Curcumin (C-AgNP) in relation to the toxicity to a key aquatic organism; Daphnia carinata. The study focused on how coatings determine fate of NPs in the medium, mortality, feeding behaviour, bioaccumulation and trophic transfer from the freshwater alga, Raphidocelis subcapitata to daphnids. NP stability tests indicated that T-AgNPs were least stable in the ASTM daphnia medium while C-AgNPs were most stable. 48 h EC50 values of AgNPs to D. carinata were in the order of E-AgNP (19.37 μg L-1) > C-AgNP (21.37 μg L-1) > T-AgNP (49.74 μg L-1) while the 48 h EC50 value of Ag+ ions was 1.21 μg L-1. AgNP contaminated algae significantly decreased the feeding rates of daphnids. However, no significant differences were observed in feeding rates between algae contaminated with differently coated AgNPs. Trophic transfer studies showed that AgNPs were transferred from algae to daphnids. The bioacumulation of AgNPs in algae and the diet-borne bioaccumulation of AgNPs in daphnids varied for differently coated AgNPs. Bioaccumulation of C-AgNPs in algae was 1.5 time higher than T-AgNPs. However, the accumulation of T-AgNPs in daphnids via trophic transfer was 2.6 times higher than T-AgNPs. The knowledge generated from this study enhances the understanding of surface property dependent toxicity, bioaccumulation and trophic transfer of AgNPs in aquatic environments.
Identifiants
pubmed: 30943225
doi: 10.1371/journal.pone.0214398
pii: PONE-D-18-30273
pmc: PMC6447189
doi:
Substances chimiques
Ligands
0
Water Pollutants, Chemical
0
Silver
3M4G523W1G
Tyrosine
42HK56048U
Catechin
8R1V1STN48
Silver Nitrate
95IT3W8JZE
epigallocatechin gallate
BQM438CTEL
Curcumin
IT942ZTH98
Banques de données
figshare
['10.6084/m9.figshare.7716497.v1']
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e0214398Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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