Publication detail

Comparative investigation of toxicity and bioaccumulation of Cd-based quantum dots and Cd salt in freshwater plant Lemna minor L.

MODLITBOVÁ, P. NOVOTNÝ, K. POŘÍZKA, P. KLUS, J. LUBAL, P. ZLÁMALOVÁ GARGOŠOVÁ, H. KAISER, J.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

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 200 µm 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.

Keywords

Bioaccumulation; Cadmium; Quantum dots; Laser-Induced Breakdown Spectroscopy; Lemna minor L.; Toxicity

Authors

MODLITBOVÁ, P.; NOVOTNÝ, K.; POŘÍZKA, P.; KLUS, J.; LUBAL, P.; ZLÁMALOVÁ GARGOŠOVÁ, H.; KAISER, J.

Released

1. 1. 2018

Publisher

Elsevier B.V.

ISBN

1090-2414

Periodical

Ecotoxicology and Environmental Safety

Year of study

147

Number

State

United Kingdom of Great Britain and Northern Ireland

Pages from

334

Pages to

341

Pages count

BibTex

@article{BUT139340,
  author="MODLITBOVÁ, P. and NOVOTNÝ, K. and POŘÍZKA, P. and KLUS, J. and LUBAL, P. and ZLÁMALOVÁ GARGOŠOVÁ, H. and KAISER, J.",
  title="Comparative investigation of toxicity and bioaccumulation of Cd-based quantum dots and Cd salt in freshwater plant Lemna minor L.",
  journal="Ecotoxicology and Environmental Safety",
  year="2018",
  volume="147",
  number="1",
  pages="334--341",
  doi="10.1016/j.ecoenv.2017.08.053",
  issn="1090-2414"
}