scholarly journals Characteristics of formation of chemical composition of groundwater of active water exchange zone of the Bodrak catchment area (South-Western Crimea)

2017 ◽  
Vol 62 (4) ◽  
Keyword(s):  
Chemical Composition ◽  
Catchment Area ◽  
Water Exchange

scholarly journals Nature of chemical composition diversity of the East Ttransbaikalia salt lakes (Russia)

2019 ◽  
Vol 98 ◽  
pp. 01003 ◽  
Author(s):  
Svetlana Borzenko
Keyword(s):  
Chemical Composition ◽  
Catchment Area ◽  
Soda Lakes ◽  
Salt Lakes ◽  
Great Role ◽  
Migration Ability ◽  
Geochemical Environment ◽  
Geochemical Conditions ◽  
Ph Values ◽  
Extensive Field

We have developed a new concept for the formation of geochemical types of salt lakes which explains the nature of their different chemical composition under close landscape-climatic and geological-geochemical conditions. The extensive field hydrogeochemical material and thermodynamic calculations demonstrate that in addition to evaporation, the interaction with rocks plays a great role in the formation of the composition of lakes. This interaction begins in the catchment area of a particular lake and continues directly in the lake. Such processes are most widespread in soda lakes, which is confirmed by the presence of the highest pH values (9.0-10.7). Besides, one of the most important processes is sulfate reduction, which results in hydrogen sulphide in lakes fundamentally changes the geochemical environment from oxidizing to reducing one and leads to a change in the oxidation state of many elements, changing their migration ability and, therefore, the ability for concentration or binding by secondary minerals. The presence of an oxidizing environment and sulphides in rocks gives additional sources for sulfates, which ensures the formation of sulfate-type lakes.

scholarly journals Groundwater chemistry: a case study of the Mesta River Basin

2021 ◽  
Vol 50 (2) ◽  
pp. 35-46
Author(s):  
Tanya Vasileva ◽  
Dimitar Sholev
Keyword(s):  
Chemical Composition ◽  
River Basin ◽  
Calcium Ions ◽  
Catchment Area ◽  
Sodium Ions ◽  
River Catchment ◽  
Bicarbonate Ions ◽  
Calcium Bicarbonate ◽  
Water Ph

The present study describes the hydrochemistry of ground waters found in the Mesta River Basin, located in the south-western part of Bulgaria. The groundwater’s composition can be expressed as follows: Ca2+ > Na+ > Mg2+ > K+; Ca2+ > Mg2+ > Na+ > K+ in equivalent units for the cations, and HCO3– > SO42– > Cl– in equivalent units for the anions. The chemical composition of the studied groundwater can be described as calcium-bicarbonate. The calcium ions make up from 17.90% to 38.62% (30.18% on average), and the bicarbonate ions make up from 35.30% to 48.98% (43.70% on average) of all ions. Taken together, the calcium and bicarbonate ions make up from 61.44% to 87.60% (73.88% on average) of all ions. The groundwater itself is of slightly alkaline nature, having pH of 7.3 to 8.6, and TDS of 67 mg/l to 611 mg/l. One groundwater sample from the Mesta River catchment area was found to be of the low-mineralized type (TDS = 193 mg/l) alkaline water (pH = 9.8) in the Mesta Lowlands – the Banichan groundwater mineral source. The water can be described as sodium-bicarbonate, with sodium ions making up to 93.5% of the cations, and bicarbonate ions – 69.6% of the anions. Out of all ions, the sodium ions were found to be 48%, and the bicarbonate ions – 33.86%. The sequence of ions is in the following order: Na+ > Ca2+ > Mg2+ > K+, and HCO3– > Cl– > SO42– > CO32–.

scholarly journals Silicon in ultrafresh groundwater: a case study of the Imandra Lake catchment, The Kola Peninsula

2019 ◽  
Vol 98 ◽  
pp. 01018
Author(s):  
Natalia V. Guseva ◽  
Yuliya G. Kopylova ◽  
Daria A Vorobeva ◽  
Albina A. Khvashchevskaya ◽  
Zinaida A. Evtyugina
Keyword(s):  
Kola Peninsula ◽  
Catchment Area ◽  
Water Exchange ◽  
Rock Interaction ◽  
Silicon Oxides ◽  
Short Period ◽  
Lake Catchment ◽  
Imandra Lake ◽  
Water Rock Interaction

The ultrafresh groundwater (with TDS values less than 200 mg/L) of the Imandra Lake catchment, Kola Peninsula, is from an intensive water exchange zone, where the water has a short period of contact with the rock. Therefore, the considered water is at the initial stages of the water–rock interaction. The water is saturated with respect to oxides and hydroxides of aluminium and iron. In the groundwater of the Imandra Lake catchment area, the silicon concentrations significantly exceed the concentrations of magnesium and especially potassium. Nevertheless, water is undersaturated with respect to with respect to silicon oxides. The shown enrichment of water with cations is explained by time of water-rock interaction.

scholarly journals Correction: Intracellular Water Exchange for Measuring the Dry Mass, Water Mass and Changes in Chemical Composition of Living Cells

PLoS ONE ◽  
2013 ◽  
Vol 8 (9) ◽  
Author(s):  
Francisco Feijó Delgado ◽  
Nathan Cermak ◽  
Vivian C. Hecht ◽  
Sungmin Son ◽  
Yingzhong Li ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Water Exchange ◽  
Water Mass ◽  
Dry Mass ◽  
Living Cells ◽  
Intracellular Water

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.

Further chemical observations on some volcanic lakes of south-east Australia of South Australia

1966 ◽  
Vol 17 (2) ◽  
pp. 229 ◽  
Author(s):  
IAE Bayly ◽  
WD Williams
Keyword(s):  
Chemical Composition ◽  
Catchment Area ◽  
South Australia ◽  
Volcanic Lakes ◽  
Conifer Plantations ◽  
Lake Edward

The chemical composition of two volcanic lakes in south-east South Australia is discussed. Data for these lakes were omitted in a previous study of lakes in the same area. For one of the lakes discussed, Lake Edward, it is suggested that the proportionately larger amount of sulphate ions is related to the presence of conifer plantations in its catchment area.

Influence of chemical composition of snow and water protection zones of Uchinsky and Pestovo reservoir on water quality

2020 ◽  
pp. 13-15
Author(s):  
Sergey Suslov ◽  
Ludmila Gruzdeva ◽  
Vladimir Gruzdev ◽  
Marina Hrustaleva
Keyword(s):  
Water Quality ◽  
Chemical Composition ◽  
Catchment Area ◽  
Chemical Structure ◽  
Water Protection ◽  
Protection Zones ◽  
Sources Of Pollution ◽  
Quality Of Water ◽  
Protection Area

Ecological geochemical research of water protection areas was held in Moscow region. Precipitation (snow) is known to influence the formation of water chemical structure and determine geochemical effect. It shows the results of snow research in water protection area of Uchinsk and Pestovo reservoirs in order to find out the sources of pollution, to assess water quality and work out the recommendations to reduce and eliminate the sources of pollution. The article gives the evaluation of water quality depending on waterflow from the catchment area and various temporary flows. It shows the influence of excessive use of fertilizers on water quality (especially in spring) which leads to eutrophication processes and worsens the quality of water.

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