Comparative investigation of toxicity and bioaccumulation of Cd-based quantum dots and Cd salt in freshwater plant Lemna minor L
Jazyk angličtina Země Nizozemsko Médium print-electronic
Typ dokumentu srovnávací studie, časopisecké články
PubMed
28858706
DOI
10.1016/j.ecoenv.2017.08.053
PII: S0147-6513(17)30552-3
Knihovny.cz E-zdroje
- Klíčová slova
- Bioaccumulation, Cadmium, Laser-Induced Breakdown Spectroscopy, Lemna minor L., Quantum dots, Toxicity,
- MeSH
- adsorpce MeSH
- Araceae účinky léků růst a vývoj metabolismus MeSH
- biomasa MeSH
- chemické látky znečišťující vodu chemie toxicita MeSH
- chlorid kademnatý metabolismus toxicita MeSH
- glutathion chemie MeSH
- kvantové tečky metabolismus toxicita MeSH
- kyselina 3-merkaptopropionová chemie MeSH
- monitorování životního prostředí metody MeSH
- sladká voda chemie MeSH
- sloučeniny kadmia metabolismus toxicita MeSH
- telur metabolismus toxicita MeSH
- teoretické modely MeSH
- Publikační typ
- časopisecké články MeSH
- srovnávací studie MeSH
- Názvy látek
- cadmium telluride MeSH Prohlížeč
- chemické látky znečišťující vodu MeSH
- chlorid kademnatý MeSH
- glutathion MeSH
- kyselina 3-merkaptopropionová MeSH
- sloučeniny kadmia MeSH
- telur MeSH
The purpose of this study was to determine the toxicity of two different sources of cadmium, i.e. CdCl2 and Cd-based Quantum Dots (QDs), for freshwater model plant Lemna minor L. Cadmium telluride QDs were capped with two coating ligands: glutathione (GSH) or 3-mercaptopropionic acid (MPA). Growth rate inhibition and final biomass inhibition of L. minor after 168-h exposure were monitored as toxicity endpoints. Dose-response curves for Cd toxicity and EC50168h values were statistically evaluated for all sources of Cd to uncover possible differences among the toxicities of tested compounds. Total Cd content and its bioaccumulation factors (BAFs) in L. minor after the exposure period were also determined to distinguish Cd bioaccumulation patterns with respect to different test compounds. Laser-Induced Breakdown Spectroscopy (LIBS) with lateral resolution of 200µm was employed in order to obtain two-dimensional maps of Cd spatial distribution in L. minor fronds. Our results show that GSH- and MPA-capped Cd-based QDs have similar toxicity for L. minor, but are significantly less toxic than CdCl2. However, both sources of Cd lead to similar patterns of Cd bioaccumulation and distribution in L. minor fronds. Our results are in line with previous reports that the main mediators of Cd toxicity and bioaccumulation in aquatic plants are Cd2+ ions dissolved from Cd-based QDs.
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