Comparative investigation of toxicity; bioaccumulation and
distribution of Cd-based Quantum dots and Cd salt in freshwater
plant Lemna minor

a 2017

Comparative investigation of toxicity; bioaccumulation and distribution of Cd-based Quantum dots and Cd salt in freshwater plant Lemna minor

ŠKARKOVÁ, Pavlína, Karel NOVOTNÝ, Pavel POŘÍZKA, Jakub KLUS, Přemysl LUBAL et. al.

Basic information

Original name

Comparative investigation of toxicity; bioaccumulation and distribution of Cd-based Quantum dots and Cd salt in freshwater plant Lemna minor

Authors

ŠKARKOVÁ, Pavlína (203 Czech Republic), Karel NOVOTNÝ (203 Czech Republic, guarantor, belonging to the institution), Pavel POŘÍZKA (203 Czech Republic), Jakub KLUS (203 Czech Republic), Přemysl LUBAL (203 Czech Republic, belonging to the institution) and Jozef KAISER (203 Czech Republic)

Edition

CSI XL - IX EMSLIBS, 2017

Other information

Language

English

Type of outcome

Konferenční abstrakt

Field of Study

10400 1.4 Chemical sciences

Country of publisher

Italy

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14310/17:00099876

Organization unit

Faculty of Science

Keywords in English

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

Abstract

V originále

Quantum dots (QDs) are fluorescent semiconductor nanocrystals with increasing use, mainly as labels for tagging or imaging in biological systems1. Like other classes of nanomaterials, they may eventually find their way into the environment. Thus it is of a high importance to research the toxicity of Cd-based QDs to environmental organisms, which may come into contact with QD-containing products when they are discarded. The purpose of this study was to determine the toxicity of two different sources of cadmium, i. e. CdCl2 and Cd-based QDs, for freshwater model plant Lemna minor. 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-hour 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. We also determined the total content of Cd and its bioaccumulation factors (BAFs) in L. minor after the exposure period to distinguish Cd bioaccumulation patterns with respect to different test compounds. Laser-Induced Breakdown Spectroscopy (LIBS) with lateral resolution of 200 um 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.

Links

ED1.1.00/02.0068, research and development project

Name: CEITEC - central european institute of technology

Citovat

ŠKARKOVÁ, Pavlína, Karel NOVOTNÝ, Pavel POŘÍZKA, Jakub KLUS, Přemysl LUBAL and Jozef KAISER. Comparative investigation of toxicity; bioaccumulation and distribution of Cd-based Quantum dots and Cd salt in freshwater plant Lemna minor. In CSI XL - IX EMSLIBS. 2017.

@proceedings{1406716,
   author = {Škarková, Pavlína and Novotný, Karel and Pořízka, Pavel and Klus, Jakub and Lubal, Přemysl and Kaiser, Jozef},
   booktitle = {CSI XL - IX EMSLIBS},
   keywords = {Bioaccumulation; Cadmium; Quantum dots; Laser-Induced Breakdown Spectroscopy; Lemna minor L.; Toxicity},
   language = {eng},
   title = {Comparative investigation of toxicity; bioaccumulation and distribution of Cd-based Quantum dots and Cd salt in freshwater plant Lemna minor},
   year = {2017}
}

TY  - CONF
ID  - 1406716
AU  - Škarková, Pavlína - Novotný, Karel - Pořízka, Pavel - Klus, Jakub - Lubal, Přemysl - Kaiser, Jozef
PY  - 2017
TI  - Comparative investigation of toxicity; bioaccumulation and distribution of Cd-based Quantum dots and Cd salt in freshwater plant Lemna minor
KW  - Bioaccumulation
KW  - Cadmium
KW  - Quantum dots
KW  - Laser-Induced Breakdown Spectroscopy
KW  - Lemna minor L.
KW  - Toxicity
N2  - Quantum dots (QDs) are fluorescent semiconductor nanocrystals with increasing use, mainly as labels for tagging or imaging in biological systems1. Like other classes of nanomaterials, they may eventually find their way into the environment. Thus it is of a high importance to research the toxicity of Cd-based QDs to environmental organisms, which may come into contact with QD-containing products when they are discarded. The purpose of this study was to determine the toxicity of two different sources of cadmium, i. e. CdCl2 and Cd-based QDs, for freshwater model plant Lemna minor. 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-hour 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. We also determined the total content of Cd and its bioaccumulation factors (BAFs) in L. minor after the exposure period to distinguish Cd bioaccumulation patterns with respect to different test compounds. Laser-Induced Breakdown Spectroscopy (LIBS) with lateral resolution of 200 um 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.
ER  -

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