Study of ecologo-biological reactions of common flax to finely dispersed metallurgical wastes

Zakharova, Olga V.; Gusev, Alexander; Skripnikova, Elena; Skripnikova, M. K.; Krutyakov, Yu. A.; Kudrinsky, A. A.; Mikhailov, I. Yu.; Senatova, S.I.; Chuprunov, C; Кузнецов, Денис

doi:10.1088/1757-899x/98/1/012018

Cited by 2 publications

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“…Using experimental toxicological and microbiological methods to determine effectiveness and safety of newly synthesized nanoparticles can be expensive and time-consuming, since they require a variety of biological tests to evaluate their effects on a wide range of types of microorganisms, plants, aquatic and soil organisms, insects and endothermic animals [14][15][16][17][18]. Scientific experience has shown that the general results of many experiments can often be predicted based on certain parameters of nanomaterials (mean diameter of NPs, absolute value and sign of zeta-potential of NPs, and equilibrium concentration of Ag + ) [19,20].…”

Section: Introductionmentioning

confidence: 99%

New Relevant Descriptor of Linear QNAR Models for Toxicity Assessment of Silver Nanoparticles

et al. 2020

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The use of silver nanoparticles (NPs) in medical, industrial and agricultural fields is becoming more widespread every year. This leads to an increasing number of experimental toxicological and microbiological studies of silver NPs aimed at establishing the risk–benefit ratio for their application. The following key parameters affecting the biological activity of silver dispersions are traditionally taken into consideration: mean diameter of NPs, surface potential of NPs and equilibrium concentration of Ag+. These characteristics are mainly predetermined by the chemical nature of the capping agent used for stabilization. However, the extent to which they influence the biological activity and the toxicity of silver NPs varies greatly. In this work, dispersions of silver NPs stabilized with a wide array of substances of different chemical nature were used for quantitative evaluation of whether the various measurable properties of silver NPs fit as descriptors of linear QNAR (quantitative nanostructure–activity relationship) models for silver NP toxicity evaluation with respect to a model eukaryotic microorganism—Saccharomyces cerevisiae yeast cells. It was shown that among the factors that determine silver NP toxicity, the charge of particles, their colloidal stability and the ability to generate Ag+ ions carry more importance than the descriptors related to the particle size. A significant synergistic effect between the ζ-potential and the colloidal stability of silver NPs on their toxicity was also discovered. Following this, a new descriptor has been proposed for the integral characterization of the silver dispersion colloidal stability. According to the obtained data, it can be considered applicable for building QNAR models of higher efficacy. The validity testing of the proposed model for theoretical prediction of silver NP toxicity using a wide range of living organisms has shown that this new descriptor correlates with toxicity much better compared to most traditionally used descriptors. Consequently, it seems promising in terms of being used not only in situations involving the rather narrow array of the objects tested, but also for the construction of silver NP toxicity models with respect to other living organisms.

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Section: Introductionmentioning

confidence: 99%

New Relevant Descriptor of Linear QNAR Models for Toxicity Assessment of Silver Nanoparticles

et al. 2020

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Highly Dispersed Blast-Furnace Sludge as a New Micronutrient Fertilizer: Promising Results on Rapeseed

et al. 2022

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Due to the growing population of Earth, the problem of providing food comes to the fore. Therefore, the search for new, economically available sources of trace elements for crop production is relevant. One of these potential sources is blast-furnace sludge: highly dispersed metallurgical waste, the industrial processing of which is difficult due to its high zinc content. We studied the effect of blast-furnace sludge on rapeseed plants in laboratory, greenhouse, and field experiments and also assessed the accumulation of sludge components in plant organs. The studied sludge sample consisted of micron and submicron particles containing compounds of iron, silicon, aluminum, zinc, calcium, and sulfur. Used concentrations: laboratory—0.01, 0.1, 1%, 10, and 100 g L−1; greenhouse—0.01, 0.1, 1, 10, and 100 g kg−1; field—0.5, 2, and 4 t ha−1. During a laboratory experiment, a decrease in the germination of rapeseed seeds exposed to 0.01, 0.1, 10, and 100 g L−1 waste was observed, but 1 g L−1 promoted the increase of this indicator by 7% regarding control (0 g L−1). While inhibiting seed germination, the sludge had a beneficial effect on the vegetative performance of plants. Reverse effects were noted in the greenhouse experiment as an increase in seed germination (introduction of 1 g kg−1 of sludge to the substrate caused maximum stimulation) and a decrease in rapeseed morphometric parameters were observed. However, at a concentration of 10 g kg−1, the root mass increased by 43% and the stem mass by 63%. In the same group, the highest content of chlorophylls was noted. The number of pods in all experimental groups of plants was less than in control (0 g kg−1) plants, but at the same time, in the variants of 0.01 and 1 g kg−1, the weight of seeds was noticeably increased, by 15.6 and 50%, respectively. Under the conditions of the field experiment, the sludge had a positive effect on the indicators of biological and economic productivity. Thus, exposure to 0.5 and 2 t ha−1 of sludge significantly increased the dry matter and leaf area. The highest values of photosynthetic capacity were recorded at a dose of 2 t ha−1. The maximum increase in yield was ensured by the introduction of sludge at a concentration of 0.5 and 2 t ha−1. The sludge dose of 4 t ha−1, which was also used, either had no effect or suppressed the development of the analyzed traits. The study of the accumulation of zinc and iron in the organs of plants showed the absence of a pronounced dose-dependent accumulation of zinc in the organs of rapeseed, while for iron, an increase in the content of the element in the organs of plants associated with an increase in the concentration of sludge in the soil was recorded. Our results demonstrate the promise of further research and development of methods for the agricultural use of highly dispersed sludge from wet gas cleaning of blast furnace production.

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Study of ecologo-biological reactions of common flax to finely dispersed metallurgical wastes

Cited by 2 publications

References 1 publication

New Relevant Descriptor of Linear QNAR Models for Toxicity Assessment of Silver Nanoparticles

New Relevant Descriptor of Linear QNAR Models for Toxicity Assessment of Silver Nanoparticles

Highly Dispersed Blast-Furnace Sludge as a New Micronutrient Fertilizer: Promising Results on Rapeseed

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