Publication detail

LIBS assessment of spatial cadmium distribution in white mustard

STŘÍTEŽSKÁ, S. MODLITBOVÁ, P. PROCHAZKA, D. ZEZULKA, Š. KUMMEROVÁ, M. NOVOTNÝ, K. POŘÍZKA, P. KAISER, J.

Original Title

LIBS assessment of spatial cadmium distribution in white mustard

Type

conference proceedings

Language

English

Original Abstract

Quantum dots (QDs) are spherical semiconductor nanocrystals with unique electrical and optical properties. Their use in bioimaging, electronic and optical industry is enabled by their highly stable, size dependant, and consequently tuneable fluorescence. The most common Cd containing QDs have a core consisting of CdSe, CdS or CdTe. However, the possibilities of Cd-based QDs applications are limited by the fact that they contain toxic Cd which, depending on the shell of QDs, could be released as highly reactive free Cd2+ and could find its way into the environment. Therefore, it is necessary to evaluate the possible risks of Cd containing QDs on various environmental organisms. The purpose of this study was to determine the difference in toxicity and bioaccumulation of two different types of Cd-based QDs dispersed in aqueous medium in white mustard (Sinapis Alba). Core QDs (CdTe) and core/shell QDs (CdTe/SiO2) were tested and CdCl2 was used as a positive control. After a 72-h exposure, the total content (MCd) was determined using Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), and bioaccumulation factors (BAFs) were established in aboveground and belowground plant parts, the total length of the root was monitored as a toxicologic end point. Laser Induced Breakdown Spectroscopy (LIBS) was used to determine the spatial resolution of Cd in model plants. The sample surface area of selected plants was analysed in a raster of spots (map) with a 100 μm step, giving the lateral resolution. Specific areas that showed interesting behaviour of QDs were measured with micro LIBS. As the obtained results from LIBS measurements have shown, spatial distribution and bioaccumulation patterns of QDs differed from the positive control. The boundary between the root and hypocotyl, where the distribution of QDs varied in between all the Cd sources, was measured by micro LIBS as it was another method of observing the differences in distribution and bioaccumulation of used Cd sources.

Keywords

Laser-Induced Breakdown Spectroscopy; Quantum Dots; Sinapis alba; Cadmium

Authors

STŘÍTEŽSKÁ, S.; MODLITBOVÁ, P.; PROCHAZKA, D.; ZEZULKA, Š.; KUMMEROVÁ, M.; NOVOTNÝ, K.; POŘÍZKA, P.; KAISER, J.

Released

8. 9. 2019

Publisher

Spektroskopická společnost Jana Marka Marci

Location

Brno

ISBN

978-80-88195-13-9

Book

BOOK OF ABSTRACTS 10th Euro-Mediterranean Symposiumon Laser-Induced Breakdown Spectroscopy

Pages from

139

Pages to

140

Pages count

2

URL

https://emslibs.com/wp-content/uploads/2019/09/b3.2.pdf

BibTex

@proceedings{BUT159339,
  editor="Sára {Střítežská} and Pavlína {Modlitbová} and David {Prochazka} and Štěpán {Zezulka} and Marie {Kummerová} and Karel {Novotný} and Pavel {Pořízka} and Jozef {Kaiser}",
  title="LIBS assessment of spatial cadmium distribution in white mustard",
  year="2019",
  pages="139--140",
  publisher="Spektroskopická společnost Jana Marka Marci",
  address="Brno",
  isbn="978-80-88195-13-9",
  url="https://emslibs.com/wp-content/uploads/2019/09/b3.2.pdf"
}