Study of zinc oxide nanoparticles and zinc chloride toxicity to annelid Enchytraeus crypticus in modified agar-based media

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39913156" target="_blank" >RIV/00216275:25310/18:39913156 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007%2Fs11356-018-2356-9" target="_blank" >https://link.springer.com/article/10.1007%2Fs11356-018-2356-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11356-018-2356-9" target="_blank" >10.1007/s11356-018-2356-9</a>

Result language

angličtina

Original language name

Study of zinc oxide nanoparticles and zinc chloride toxicity to annelid Enchytraeus crypticus in modified agar-based media

Original language description

Acute toxicity of zinc oxide nanoparticle (ZnO-NP, mean particle size diameter of 10 nm) powder and water-soluble salt of zinc (ZnCl2) to annelid Enchytraeus crypticus was tested using an agar-based nutrient-enriched medium with the addition of kaolin and humic acids (HA). Adults of the E. crypticus were cultivated in pure agar and in three types of modified exposure media containing different proportions of model soil constituents. Potworms were exposed to zinc in both forms (1-1000 mg kg(-1) of agar) for 96 h. In experiments with ZnCl2, toxicity of zinc was the highest in pure agar followed by agar with HA and agar with kaolin and HA and the lowest toxicity was observed in agar with kaolin. The corresponding LC50 values were 13.2, 28.8, 39.4, and 75.4 mg kg(-1) respectively. In contrast, zinc in the form of ZnO-NPs was most toxic in the presence of HA followed by pure agar, agar with kaolin, and kaolin with HA. In this case, LC50 values were 15.8, 43.5, 111, and 122 mg kg(-1) respectively. Scanning electron microscopy revealed that the smallest agglomerates occurred in the presence of kaolin, where ZnO-NPs were sealed in a kaolin shell. This effect reduced the bioavailability and toxicity of the NPs. In contrast, larger agglomerates were observed in the presence of HA but a larger amount of zinc was dispersed in the volume of agar.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Environmental Science and Pollution Research

ISSN

0944-1344

e-ISSN

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Volume of the periodical

25

Issue of the periodical within the volume

23

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

22702-22709

UT code for WoS article

000441007000034

EID of the result in the Scopus database

2-s2.0-85047820809