Title: The influence of hydrothermal nanosilica powder aquaspersions on the vital capacity of Daphnia magna Straus crustaceans

Authors: A.A. Lapin; M.L. Kalayda; V.V. Potapov; V.N. Zelenkov; N.L. Voropaeva

Addresses: Department of Water Bioresources and Aquaculture, Kazan State Power Engineering University, 51 Krasnoselskaya St., Kazan, the Republic of Tatarstan, Russia ' Department of Water Bioresources and Aquaculture, Kazan State Power Engineering University, 51 Krasnoselskaya St., Kazan, the Republic of Tatarstan, Russia ' Geotechnological Scientific Research Center of the Russian Academy of Sciences, 30 Severo-Vostochnoye Shosse, Petropavlovsk-Kamchatsky, Russia ' FGBNU All-Russian Research Institute of Vegetable Crops, Vereya, Ramensky District, Moscow Region, Russia ' FGBNU All-Russian Scientific Research Institute of the Russian Academy of Sciences, Lipetsk, Russia

Abstract: This paper cites the results of measuring the influence of aqueous dispersions of nanosilica samples (separated from hydrothermal heat-transfer agent solutions at certain geothermal power plants) used for experimental and industrial purposes on the death-rate of Daphnia magna Straus. The results of the tests conducted in accordance with the approved procedure demonstrate that nanosilica at the concentration of less than 4 × 10-2 g/dm3 does not have toxic influence on Daphnia in the aqueous medium. This fact supports the ecological safety of Russian techniques for utilising nanodispersive silica of a hydrothermal origin in such spheres as plant growing (when plants are treated with nanosilica above the roots on the open-air soil) and production of new types of fish feed in interior and exterior reservoirs.

Keywords: nanodispersive hydrothermal silica; toxicity; biotesting; lower crustaceans Daphnia magna Straus; ecology of natural environment; plant growing; fish feed.

DOI: 10.1504/IJNT.2018.094799

International Journal of Nanotechnology, 2018 Vol.15 No.4/5, pp.422 - 432

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 10 Sep 2018 *

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