scholarly journals Geochemistry of calcite-precipitating waters of the European Northeast

2019 ◽  
Vol 98 ◽  
pp. 07018
Author(s):  
Tatiana P. Mityusheva
Keyword(s):  
Chemical Composition ◽  
Underground Waters ◽  
Chemical Type ◽  
Calcareous Tufa ◽  
Hydrochemical Conditions ◽  
Continental Carbonates ◽  
Continental Climate

The geochemistry of natural calcite-precipitating waters of the European northeast was presented in this paper. The chemical composition and main hydro-chemical type of these surface and underground waters are various, TDS from 239 to 2090 mg/L. The waters are supersaturated with respect to calcite, there are favorable hydrochemical conditions for formation recent continental carbonates (calcareous tufa, charophyta, calcareous crusts on macrophytes) in the conditions of moderate continental climate.

scholarly journals Geochemistry of strontium in fresh underground waters of the Sredneobskoy basin (Tomsk region, Russia)

2019 ◽  
Vol 98 ◽  
pp. 01024
Author(s):  
Irina Ivanova
Keyword(s):  
Chemical Composition ◽  
Upper Cretaceous ◽  
Biologically Active ◽  
Strontium Content ◽  
Rock Interaction ◽  
Underground Waters ◽  
Tomsk Region ◽  
Resident Time ◽  
High Concentrations ◽  
Water Rock Interaction

In the central part of Western Siberia a study of the chemical composition of fresh underground waters in the upper 600 m of the Sredneobskoy artesian basin was carried out. It was shown that underground waters generally contain high concentrations of strontium. The minimum concentrations of Sr are typical for Neogene-Quaternary sediments (600 µg/L), maximum values in the waters of the Upper Cretaceous sediments (more than 1300 µg/L). The study of strontium accumulation mechanisms in drinking underground waters is undoubtedly an important issue, as strontium is a biologically active element. Especially dangerous is the consumption of underground waters with a calcium-strontium ratio less than 100, that is the hydrogeochemical precondition for Urov endemic (Kashin-Beck disease). According to the calcium/strontium ratios data waters of the Neogene-Quaternary and Paleogene sediments selected in the south-western part of the Tomsk region are unsuitable for drinking water supply. Underground waters are shown to be in equilibrium with Al and Fe hydroxides; Ca, Mg, Fe carbonates; and clay minerals, including ferruginous. Increased strontium content in aquifers is determined not only by the chemical composition of the water-bearing rocks, but also increasing resident time of water rock interaction.

scholarly journals Long-term changes in the chemical composition of the water of the Inhulets and Saksahan rivers within the Kryvorizkyi Iron Ore Basin (1980–2020)

2021 ◽  
Vol 30 (3) ◽  
pp. 470-479
Author(s):  
V. K. Khilchevskyi ◽  
N. P. Sherstiuk
Keyword(s):  
Chemical Composition ◽  
River Water ◽  
Mine Water ◽  
Iron Ore ◽  
Mine Waters ◽  
Hydrochemical Regime ◽  
Underground Waters ◽  
Storage Pond ◽  
High Concentrations ◽  
Environmental Measures

The article presents the generalized results of chemical composition research of waters from Inhulets and Saksahan rivers on the territory adjacent to the Northern and Inhulets with pumping of underground waters (mine and quarry), which have an abnormal chemical composition, high mineralization and contain high concentrations of microcomponents. The following scheme of mine water utilization is used in the Kryvyi Rih iron ore basin: the mines of the northern part of Kryvbas discharge water into the tailings dam of Northern Iron Ore Dressing works (Northern GZK); mines of the southern part discharge mine waters into the storage pond of the Svistunov creek during the year, and in the winter its waters are discharged into the Inhulets River with subsequent washing of the river in the spring-summer period. Such treatment of mine and quarry waters has led to the formation of a hydrochemical anomaly on the territory of Northern GZK with the center in the tailings. The mineralization of water in the pond reaches 23 g / l (2020). There is a high content of microcomponents: lead, cadmium, vanadium, manganese, boron, bromine, nickel, mercury, thiocyanates. As a result, the mineralization of the Saksahan River water increases over time (up to 5.4 g / l), the content of microcomponents also increases and becomes quite high. Prolonged use of the Inhulets River for utilization of mine water from the Svistunov creek storage pond has led to a change in the type of water: instead of type II (river water), Inhulets water belongs to the type III (metamorphosed waters). There are no regularities in the change of chemical composition of water (hydrochemical regime) in Inhulets, which is a consequence of the introduction of the scheme "discharge – flushing" for the disposal of mine water. Among the microcomponents in the water of Inhulets there is an increased content of vanadium, boron and bromine (7–8 times), single excess of lead content. The analysis of equilibria in the carbonate-calcium system of the Inhulets and Saksahan rivers confirmed that the existing hydrochemical regime for the studied rivers is stationary, thus, the environmental measures implemented will not have rapid consequences.

USE OF SPATIAL ANALYSIS TOOLS AND CAPABILITY OF GEOINFORMATION SYSTEMS FOR ASSESSMENT OF THE STATE OF UNDERGROUND WATERS

2020 ◽  
pp. 100-105
Author(s):  
О. Ostroukh ◽  
D. Chomko ◽  
V. Ostroukh ◽  
I. Pidlisetska
Keyword(s):  
Spatial Analysis ◽  
Chemical Composition ◽  
Information Technologies ◽  
Groundwater Resources ◽  
Integrated Approach ◽  
Temporal Changes ◽  
Geoinformation Systems ◽  
Underground Waters ◽  
Geographic Information Technologies ◽  
Spatio Temporal

The results of the study of the ecological-hydrogeochemical state of the underground waters of the Chop-Mukachevo basin and the identification of its spatio-temporal changes in the chemical composition using GIS facilities are presented. The methodology for processing the initial hydrogeological data on the basis of geographic information technologies has been improved and tested on the example of spatio-temporal changes in the indicators of chemical composition. A specialized geoinformation database of the chemical composition of groundwater has been created. The evaluation of spatio-temporal patterns of changes in the chemical composition using statistical analysis, cartographic modeling, and spatial analysis in GIS, identified areas with increased salinity and hardness of groundwater. Based on an integrated approach, zoning was performed and the current hydrogeochemical state of the groundwater resources of the study area was evaluated.

scholarly journals AGRESIVITAS AIRTANAH KARST SUNGAI BAWAH TANAH BRIBIN, GUNUNG SEWU

2017 ◽  
Author(s):  
Tjahyo Nugroho Adji
Keyword(s):  
Chemical Composition ◽  
Catchment Area ◽  
Dissolution Process ◽  
Karst Groundwater ◽  
Saturation Indices ◽  
Calcite Dissolution ◽  
Hydrogeochemical Process ◽  
End Point ◽  
Chemical Type ◽  
Underground River

Karst groundwater agressivity, which is here meant as the ability of water to dissolve limestone plays asignificant role to sustain the discharge of Bribin River. This article describes the spatial karst groundwateragressivity of Bribin underground river along flowpath. The boundary of analysis used in this research isthe tentative catchment area of Bribin River starting from Pentung River (swallow hole) as an inlet andBribin Cave as the end point (outlet).39 caves within the catchment were mapped, and 8 underground river were sampled and analyzed inlaboratory to achieve the chemical composition of groundwater including cation (Ca2+, Mg2+, Na+, K+) andanion (Cl-, SO4 2-, HCO3-). Afterwards, the result of laboratory is used to identify the chemical type of karst groundwater. Groundwater agressivity is subsequently classified by using chemical agressivity diagram in the system of pH – ToC – CaCO3 in order to account the ΔpH and ΔTAC. Finally, using the value of ΔpH and ΔTAC, the rate of karst groundwater agressivity may be defined. In addition, to define the stage of dissolution process along flowpath, analysis of Saturation Indices (SI) with respect to calcite (CaCO3) is also to be applied. The result indicates that there is a tendency of the decreasing rate of groundwater agressivity along flowpath. The inlet (Pentung River) characterized by high groundwater agressivity, and then there is a moderate decreasing trend of groundwater agressivity downstream. Finally, the rate of agressivity in the end point (Bribin Cave) confirms the low agressivity stage occurs. Furthermore, the analysis of SI values shows that the dominant hydrogeochemical process is calcite dissolution, even though this values is very close to equilibrium at Bribin Cave. Meanwhile, interesting phenomena present in Sodong Cave, where the sample is classified as aggressive water with the SI value of -0.43 inevitable that leakage ofBribin River may occur in the future.

scholarly journals Geochemistry of ice in frost mounds in the valley of the River Sentsa (Oka plateau, East Sayan)

2018 ◽  
Vol 58 (4) ◽  
pp. 524-536
Author(s):  
S. V. Alekseev ◽  
L. P. Alekseeva
Keyword(s):  
Chemical Composition ◽  
Late Pleistocene ◽  
Lacustrine Sediments ◽  
Unconsolidated Sediments ◽  
Geochemical Type ◽  
Rock Interaction ◽  
Terminal Moraine ◽  
Underground Waters ◽  
Injection Process ◽  
Eastern Sayan

Te authors examined the chemical composition of underground ice sampled from the frost mounds located in the loose (unconsolidated) sediments of the Sentsa River valley (Oka plateau, Eastern Sayan) with the purpose of reconstruction the formation history of these cryogenic creations. Numerous frost mounds of various sizes are mainly composed of alternating icy loams, sandy loams, and lenses of pure ice. Samples of underground ice taken in the outcrops of the river ledges and cores from wells together with samples of river and lake waters were analyzed by traditional hydrochemical techniques (methods) in the center "Geodynamics and geochronology" (Institute of the Earth's Crust of the Siberian branch of RAS, Irkutsk). It was found that the chemical composition of pure ice melts from lenses and layers of the frost mounds is hydrocarbonate calcium (HCO3 Ca, SO4-HCO3 Ca and NH4-HCO3 Ca) with mineralization of 6.5 – 15.6 mg/L, pH = 5.6÷6.1. Mineralization of melts of texture-forming ice, taken from icy ground (i.e. with fractions of enclosing loams) was much higher – from 50 to 792.5 mg/L. River and lake water is ultra-fresh with 99–132 mg/L salinity, and according to geochemical type it is hydrocarbonate calcium (HCO3 Ca). Te specifc features of chemical composition of the underground ice (high content of ammonium salts and sulfates) depend on a water-rock interaction, the presence of organic matter in the loose (unconsolidated) sediments and a repeated volcanic activity in the late Pleistocene–Holocene. Te frost mounds are confned to a lacustrine sediments area in the backwater zone that was formed by the Late Pleistocene terminal moraine. Teir formation in the Holocene took place as a result of segregational ice formation during freezing of water-saturated lake sediments, and, presumably, repeated injections of underground waters of the under-channel and floodplain aquifers hydraulically connected with river waters. Tus, the genesis of the studied frost mounds is probably a mixed segregation-injection process.

scholarly journals MINERAL DRINKING TABLE WATER OF ALTAI: CHARACTERISTICS AND PROSPECTS OF USE

2021 ◽  
Vol 2 (2) ◽  
pp. 90-94
Author(s):  
Anna A. Kokhanenko ◽  
Natal G. Sidorina ◽  
Elena A. Korol
Keyword(s):  
Chemical Composition ◽  
Altai Republic ◽  
Underground Waters ◽  
Gorny Altai ◽  
Physical And Chemical

The characteristics of fresh underground waters of the Altai Republic are given. The typification of these waters has been carried out. The features of the physical and chemical composition of natural table waters of Gorny Altai and the prospects for their use are shown.

scholarly journals MSW landfill leachate: formation, characterization and treatment

2020 ◽  
Vol 61 (3) ◽  
pp. 79-85
Author(s):  
Natalia O. Milyutina ◽  
◽  
Pavel S. Zelenkovsky ◽  
Yulia A. Smyatskaya ◽  
Natalia A. Politaeva ◽  
...  
Keyword(s):  
Life Cycle ◽  
Chemical Composition ◽  
Metal Ions ◽  
Negative Impact ◽  
Oxygen Demand ◽  
Anaerobic Conditions ◽  
Underground Waters ◽  
Physicochemical Methods ◽  
Waste Degradation ◽  
Aerobic And Anaerobic

The present article discusses the negative impact of municipal solid waste (MSW) landfills on the environment due to the migration of leachate formed during waste decomposition. The leachate contains an extensive list of pollutants that migrates in soils, surface and underground waters. The article provides a review of literature regarding the main stages of leachate formation and changes in its chemical composition during the landfill’s life cycle. Landfill waste undergo biogeochemical decomposition in aerobic and anaerobic conditions. At the initial stages of waste degradation, easily decomposable organic compounds oxidize leading to high values of chemical and biological oxygen demand (COD and BOD) in the formed leachate, lowering the pH of the medium to 4-5. This in turn leads to the transition of metal ions to the liquid phase due to an increase of their activity in acidic mediums. In anaerobic conditions, further waste degradation takes place producing carbon dioxide, methane, ammonia, mercaptans, hydrogen sulfide, organic acids and water. In the leachate formed after 10 years of landfill operation, the content of organic carbon decreases, the fraction of bioresistant components increases, the pH of the medium increases to 7.5-8.5, metal ions form hardly soluble compounds and sulfates are reduced to sulfides. The chemical composition of the leachate, presented in this article, demonstrates its changes depending on the stage of the landfill’s life cycle. Also, basic schemes of treatment plants for MSW leachate used in Russia and abroad are described based on a combination of traditional wastewater treatment methods (mechanical, biological and physicochemical methods).

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