Influence of Silver Pollution on the Activity of Soil Catalase in South of Russia

Tsepina, Natalia; Sudina, Lyudmila V.; Minnikova, Tatiana; Колесников, С. И.

doi:10.37279/2413-1725-2020-6-2-259-266

Cited by 2 publications

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“…A comparison of the greater sensitivity of silver oxides and nitrates made it possible to reproduce the previously presented small studies assessing the toxicity of various chemical forms of Ag [71][72][73]. Quite a lot of studies have been conducted to assess the toxicity of Ag nitrate, and the toxicity of Ag oxide has been studied to a lesser extent [74,75].…”

Section: Sensitivity Of Biological Indicatorsmentioning

confidence: 99%

Estimation of the Enzymatic Activity of Haplic Chernozem under Contamination with Oxides and Nitrates of Ag, Bi, Te and Tl

et al. 2022

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Sustainable agriculture is only possible if the agroecological services of the soil are preserved. Soil contamination with rare elements such as silver (Ag), bismuth (Bi), tellurium (Te), and thallium (Tl) is less studied, but their toxicity is no less high than in other heavy metals. Activity of soil enzymes is of great importance for the healthy functioning of soils, agroecosystem services, and their fertility. It is necessary to assess the ecological state of black soil using the most sensitive and informative indicators of the state of soils—their enzymatic activity. The objective of this research was to evaluate changes in activity of five priority soil enzymes (catalase, dehydrogenases, invertase, phosphatase, and urease) when contaminated with oxides and nitrates of Ag, Bi, Te, and Tl in a laboratory model experiment. The integral toxicity of nitrates and oxides of Ag, Bi, Te, and Tl was assessed by the integrated index of soil enzymatic activity. A comparison of the toxicity of oxides and nitrates of each element, according to the integrated index of soil enzymatic activity, allowed us to establish that Ag oxide is more toxic than Ag nitrate; Bi oxide is equivalent in its toxicity to Bi nitrate; and Tl and Te oxides are less toxic than Tl and Te nitrates. When contaminated with oxides, the most informative indicators are activity of invertase (Ag), urease (Bi, Tl), and phosphatase (Te). When contaminated with nitrates, the most informative indicators are activity of phosphatase (Ag) and invertase (Bi, Tl, and Te). Activity of phosphatase and catalase are the most sensitive to contamination by oxides and nitrates of Ag, Bi, Tl, and Te, and dehydrogenases, invertase, and urease are the least sensitive.

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Section: Sensitivity Of Biological Indicatorsmentioning

confidence: 99%

Estimation of the Enzymatic Activity of Haplic Chernozem under Contamination with Oxides and Nitrates of Ag, Bi, Te and Tl

et al. 2022

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Soil Contamination by Silver and Assessment of Its Ecotoxicity

Tsepina

Колесников

Minnikova

et al. 2022

RAS

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The purpose of the review was to analyze soil pollution with various chemical compounds of silver (oxides, sulfides, nitrates, nanoparticles) and the ecotoxic effect on the response of microbiological indicators, enzymatic activity, initial growth, and development of plants to soil pollution. The objectives of the study were to analyze modern literature sources, versus to data on chemical compounds, silver concentrations, and duration of exposure. The analytical review is devoted to the presentation and analysis of the ecotoxicity of chemical compounds of silver (Ag) for animals, plants, and soil. It has been established that the main anthropogenic sources of Ag pollution of the environment, including soils, are emissions from thermal power plants when burning coal, the operation of non-ferrous and ferrous metallurgy enterprises, cement plants, waste storage at solid waste landfills, the production of photographic and electrical materials, the use of pesticides, and the use of sewage sludge as fertilizer. The published values for the Ag content in contaminated soil range from 8 to 35 mg/kg, and in soils of ore deposits up to 7000 mg/kg. The negative effect of Ag is manifested in a decrease in the length of roots and biomass of plants, suppression of the growth and reproduction of earthworms, a decrease in the number of soil bacteria, and inhibition of the activity of soil enzymes. It is concluded that it is necessary to conduct experiments aimed at assessing the consequences of the entry of various chemical compounds of Ag into soils and ecosystems. The duration of experiments is from days to a year, when using concentrations of oxide, sulfide, nitrate, and nanoparticles of Ag more than 0.5 mg/kg. It is advisable to develop maximum permissible concentrations (MPCs) and approximate permissible concentrations (APCs) for Ag chemical compounds in the soil.

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Influence of Silver Pollution on the Activity of Soil Catalase in South of Russia

Cited by 2 publications

References 0 publications

Estimation of the Enzymatic Activity of Haplic Chernozem under Contamination with Oxides and Nitrates of Ag, Bi, Te and Tl

Estimation of the Enzymatic Activity of Haplic Chernozem under Contamination with Oxides and Nitrates of Ag, Bi, Te and Tl

Soil Contamination by Silver and Assessment of Its Ecotoxicity

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