Uptake of 133 Cs and 134 Cs by Ceratophyllum demersum L. under field and greenhouse conditions.

Autor: Vacula J; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Prague-Suchdol 165 00, Czech Republic. Electronic address: vacula@fzp.czu.cz., Komínková D; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Prague-Suchdol 165 00, Czech Republic. Electronic address: kominkovad@fzp.czu.cz., Pecharová E; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Prague-Suchdol 165 00, Czech Republic. Electronic address: pecharovae@fzp.czu.cz., Doksanská T; National Radiation Protection Institute, Bartoškova 28, Prague 4 140 00, Czech Republic. Electronic address: tereza.doksanska@suro.cz., Pechar L; ENKI o.p.s, Dukelská 145, 379 01 Třeboň, Czech Republic. Electronic address: pechar@enki.cz.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2020 Jun 10; Vol. 720, pp. 137292. Date of Electronic Publication: 2020 Mar 08.
DOI: 10.1016/j.scitotenv.2020.137292
Abstrakt: The phytoremediation abilities of Hornwort (Ceratophyllum demersum L.) were tested under greenhouse and field conditions. Plants were exposed for 8, 16, and 24 days (greenhouse with stable isotope 133 Cs), 8 days (field with 133 Cs), and 8 days (climabox with radioactive isotope 134 Cs). The plants were exposed to different concentration of stable Cs provided as CsCl (0.008, 0.033, 0.133, 0.267, 0.533, 0.800, 1.067, and 1.333 mM) and different activities of 134 Cs (4.46, 4.46, 4.74, 4.64, 2.23 and 2.26 kBq). The results of the experiment revealed a significant effect (p < 0.001) of exposure time on Cs uptake. The results showed highest average 133 Cs removal rates of 11%, 17% and 19% for 8, 16, and 24 days, respectively, in the greenhouse, 10% for the 134 Cs experiment, and 27% for the field experiment with 133 Cs. The results indicated that increasing the length of exposure lowered the uptake ability, hence indicating that the plant has limited capacity for Cs removal. The accumulated amount of Cs by plants is significantly dependent (p < 0.001) on the concentration of treatment and complies to a sigmoid curve. Comparison of experiments revealed the greenhouse experiment with 133 Cs and the experiment with 134 Cs did not differ significantly in their removal rate. However, the field experiment was significantly different from the previous two (p < 0.001), providing a higher removal rate. C. demersum was also able to resist phytotoxic effects of Cs in the greenhouse experiment for 16 days without significant effects (p > 0.05) on health. Even after 24 days of exposure, the plant resisted up to 0.267 mM treatment concentration with no significant tissue lesion (p > 0.05). These results indicate that C. demersum has potential for remediating aquatic habitats, especially in the case of acute events, where a short duration of phytoremediation may take place.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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