Bioassay of Humic Products as Potential Remedies: A Review

Терехова, В. А.; Федосеева, Е. В.; Panova, M. I.; Чуков, С. Н.

doi:10.1134/s1064229322070109

Cited by 4 publications

(3 citation statements)

References 63 publications

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“…Sodium humate, due to the presence of sodium ions in Haplic Chernozem, as an ameliorant, is probably not effective, but in other soils poor in sodium ions it may be advisable. Previously, the use of sodium humate as a biostimulator of native soil microbiota in various types of pollution was studied [4,23]. In this study, a 1% solution of sodium humate "GUMI-30" was added into the soil for remediation (Ufa, Republic of Bashkortostan, Russia).…”

Section: E)mentioning

confidence: 99%

Enzymatic Assessment of the State of Oil-Contaminated Soils in the South of Russia after Bioremediation

Minnikova

Колесников

Revina

et al. 2023

Toxics

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Soil pollution with oil as a result of accidents at oil pipelines and oil refineries is a frequent occurrence in the south of Russia. To restore such polluted lands, it is necessary to carry out soil remediation measures. This work aimed to evaluate the use of ameliorants of various natures (biochar, sodium humate, and microbial preparation Baikal EM-1) to restore the ecological state of oil-contaminated soils with different properties (Haplic Chernozem, Haplic Arenosols, Haplic Cambisols). To assess the ecological state of soils, the following physicochemical and biological indicators were studied: residual oil content, redox potential, and medium reaction (pH). Changes in enzymatic activity were also studied, including catalase, dehydrogenases, invertase, urease, and phosphatase. The greatest decomposition of oil in Haplic Chernozem and Haplic Cambisols was provided by Baikal EM-1 (56 and 26%), and in Haplic Arenosols, this was provided by biochar (94%) and sodium humate (93%). In oil-contaminated Haplic Cambisols, the content of easily soluble salts with the addition of biochar and Baikal EM-1 increased by 83 and 58%, respectively. The introduction of biochar caused an increase in pH from 5.3 (Haplic Cambisols) to 8.2 (Haplic Arenosols). The introduction of oil-contaminated Haplic Arenosols of biochar, humate, and Baikal stimulated the activity of catalase and dehydrogenases by 52–245%. The activity of invertase was stimulated in the Haplic Chernozem after the introduction of ameliorants by 15–50%. The activity of urease was stimulated after the introduction of ameliorants into borax and Arenosol by 15–250%. The most effective ameliorant for restoring the ecological state of Haplic Cambisols after oil pollution was biochar. For Haplic Arenosols, this was sodium humate, and for Haplic Chernozem, the effectiveness of biochar and sodium humate did not differ. The most informative indicator for the remediation of Haplic Chernozem and Haplic Cambisols was the activity of dehydrogenases, and for Haplic Arenosols, this was the activity of phosphatase. The results of the study should be used to biomonitor the ecological state of oil-contaminated soils after bioremediation.

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Section: E)mentioning

confidence: 99%

Enzymatic Assessment of the State of Oil-Contaminated Soils in the South of Russia after Bioremediation

Minnikova

Колесников

Revina

et al. 2023

Toxics

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“…Studying the effects of low-intensity radiation in the presence of HS forms the basis for predicting the response of living organisms to radiation in large areas contaminated with radionuclides after accidents, discharges from nuclear power plants or underground mining of natural resources [30,32,44,49,50,139].…”

Section: Role Of Humic Substances As Radioprotective Agents In Water ...mentioning

confidence: 99%

Marine Bacteria under Low-Intensity Radioactive Exposure: Model Experiments

Kolesnik

Rozhko

Kudryasheva

2022

IJMS

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Radioactive contaminants create problems all over world, involving marine ecosystems, with their ecological importance increasing in the future. The review focuses on bioeffects of a series of alpha and beta emitting radioisotopes (americium-241, uranium-(235 + 238), thorium-232, and tritium) and gamma radiation. Low-intensity exposures are under special consideration. Great attention has been paid to luminous marine bacteria as representatives of marine microorganisms and a conventional bioassay system. This bioassay uses bacterial bioluminescence intensity as the main testing physiological parameter; currently, it is widely applied due to its simplicity and sensitivity. Dependences of the bacterial luminescence response on the exposure time and irradiation intensity were reviewed, and applicability of hormetic or threshold models was discussed. A number of aspects of molecular intracellular processes under exposure to low-intensity radiation were analyzed: (a) changes in the rates of enzymatic processes in bacteria with the bioluminescent system of coupled enzymatic reactions of NADH:FMN-oxidoreductase and bacterial luciferase taken as an example; (b) consumption of an intracellular reducer, NADH; (c) active role of reactive oxygen species; (d) repairing of the DNA damage. The results presented confirm the function of humic substances as natural radioprotectors.

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“…Humic substances are also capable of chelating organometallic substances, thereby sequestering toxic heavy metals. The ecological consequence of such binding includes changes in the form of the existence of toxic substances and their ability to migrate, a decrease in their bioavailability, and a reduction in their toxicity [21]. This is because the free form of the toxicant has the highest activity, while the bound substance loses its toxicity.…”

Section: Introductionmentioning

confidence: 99%

Optical Proxies of Euxinia: Spectroscopic Studies of CDOM, Chlorophyll, and Bacteriochlorophylls in the Lagoon on Zeleny Cape (the White Sea)

et al. 2023

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Along the shoreline of the White Sea, due to the post-glacial uplift of the coast, some water bodies with stable stratification have been formed. They have been classified as meromictic as they are at different stages of isolation from the Sea. As separation progresses, significant changes occur in the water column, including the composition of chromophoric dissolved organic matter (CDOM) and the structure of the aquatic microbial community. In this work, we searched for optical proxies of euxinia (anoxic conditions with accumulated hydrogen sulfide) in the water column of the meromictic lagoon on Zeleny Cape. The lagoon is separated from the White Sea basin by a shallow threshold that completely isolates the lagoon during low tide, but marine water enters the lagoon during high tide. The ecosystem in the lagoon is characterized by the marine salinity of water and a high organic matter content in the bottom water and sediments. In this study, spectral methods were used to obtain the depth distribution of CDOM, chlorophyll, and bacteriochlorophyll in the lagoon with strong water stratification and euxinic conditions in the bottom water. The measured optical CDOM characteristics were compared with hydrochemical data (water salinity, Eh, pH, dissolved oxygen), phytoplankton (oxygenic phototrophs), and green sulfur bacteria (anoxygenic phototrophs) distribution along the water column. The spectroscopic methods showed to have the advantages of not requiring water sample pre-treatment and allowing rapid sensing of CDOM and photosynthetic pigments at each horizon.

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Bioassay of Humic Products as Potential Remedies: A Review

Cited by 4 publications

References 63 publications

Enzymatic Assessment of the State of Oil-Contaminated Soils in the South of Russia after Bioremediation

Enzymatic Assessment of the State of Oil-Contaminated Soils in the South of Russia after Bioremediation

Marine Bacteria under Low-Intensity Radioactive Exposure: Model Experiments

Optical Proxies of Euxinia: Spectroscopic Studies of CDOM, Chlorophyll, and Bacteriochlorophylls in the Lagoon on Zeleny Cape (the White Sea)

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