Space and time regularities in the distribution of dissolved and suspended manganese forms in Novosibirsk Reservoir water

Papina, Tatyana; Эйрих, А. Н.; Серых, Т. Г.; Dryupina, Ekaterina

doi:10.1134/s0097807817020105

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…Of particular note is the exceptionally high concentration of Mn, exceeding summer values by more than two orders of magnitude. This anomaly is a ributed to the formation of a reducing environment in bo om sediments towards the end of the ice period, facilitating the reduction of Mn 4+ to Mn 2+ and leading to its intensive release into the water [40]. The decrease in Mn concentration during summer is a ributed to the precipitation of hydroxides at higher pH levels, along with active uptake by living organisms [18].…”

Section: Elemental Composition Of the Dissolved Fractionmentioning

confidence: 99%

Climate Change and the Ob River: A Reassessment of Major and Trace Element Fluxes to the Arctic Ocean

Moskovchenko,

Soromotin,

Khoroshavin

et al. 2024

Preprint

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This study investigated the content of macro- and microelements in the lower reaches of the Ob River (Western Siberia). Seasonal sampling was performed over a four-year period (2020-2023) during the main hydrological seasons (winter low water, spring-summer floods, and early fall low water) at three river stations. Suspended and dissolved fractions were separated by filtration through 0.45-micron nitrocellulose filters. The results revealed significant seasonal variations in the elemental content of the Ob River water, associated with changes in catchment inputs, physical and chemical conditions of the aquatic environment, and the amount and composition of incoming suspended sediment. During high water flow events in the Ob River, the concentration of suspended solids increased substantially. These included significant quantities of sparingly soluble hydrolysates such as Al, Ti, Zr, Ga. During the winter period when the Ob River was ice-covered, a 2- to 3-fold rise was observed in the concentration of Na, Mg, Ca, K, Si, Mn. Having accounted for these seasonal variations in water chemistry, we were able to refine our estimates of elemental export to the Arctic Ocean. Compared to estimates from previous studies, we observed with 2.3-fold higher dissolved loads of Mn, 2.1-fold for Zn, 1.6-fold for Fe, and 1.4-fold for Pb.

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Section: Elemental Composition Of the Dissolved Fractionmentioning

confidence: 99%

Climate Change and the Ob River: A Reassessment of Major and Trace Element Fluxes to the Arctic Ocean

Moskovchenko,

Soromotin,

Khoroshavin

et al. 2024

Preprint

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“…At the same time, Mn 2+ exists mainly in a soluble form, Mn 3+ -both in soluble and suspended form, Mn 4+ -only in the form of a precipitate. In the absence of complexation processes, the Mn 3+ ion undergoes reduction to Mn2+ [1,2]. The equilibrium between the most stable forms of Mn 2+ and Mn 4+ is realized in abiotic or microbiologically mediated redox reactions.…”

Section: Introductionmentioning

confidence: 99%

The effect of manganese ions (II) on representatives of aquatic biota

Kosarev

Ivanov

Kamenets³

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The work is devoted to the consideration of the peculiarities of the impact of manganese (II) on representatives of freshwater biota. Manganese plays an important role in the aquatic environment, since it determines the course of the most important metabolic processes in hydrobiont organisms of varying degrees of organization. The analysis of processes involving manganese has shown that the main chemical factors affecting the accumulation of manganese in the aquatic environment are anaerobic biochemical processes caused by active silting of the riverbed due to the washout of organic substances from agricultural fields. The use of various physiological endpoints in daphnids is considered as an inexpensive and simple alternative, the criterion of which corresponds to the rule “replacement, reduction, refinement”. It has been shown that manganese (II) ions in the concentration range of 0.1-1000 LOCvr do not have an acute toxic effect on D. magna crustaceans, chronic toxicity is manifested in samples with concentrations of more than 10 LOCvr. The acute toxicity of solutions of manganese (II) salts in relation to S. Quadricauda was revealed by the change in the fluorescence level of microalgae at a concentration of Mn2+ from 0.05 mg/l.

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Manganese release from corrosion products of cast iron pipes in drinking water distribution systems: Effect of water temperature, pH, alkalinity, SO42− concentration and disinfectants

et al. 2021

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Space and time regularities in the distribution of dissolved and suspended manganese forms in Novosibirsk Reservoir water

Cited by 5 publications

References 9 publications

Climate Change and the Ob River: A Reassessment of Major and Trace Element Fluxes to the Arctic Ocean

Climate Change and the Ob River: A Reassessment of Major and Trace Element Fluxes to the Arctic Ocean

The effect of manganese ions (II) on representatives of aquatic biota

Manganese release from corrosion products of cast iron pipes in drinking water distribution systems: Effect of water temperature, pH, alkalinity, SO42− concentration and disinfectants

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