scholarly journals THE FORMATION MECHANISMS OF COMPOSITION OF DRINKING GROUNDWATER OF THE Kyiv DEPOSIT (ON THE EXAMPLE OF THE OBOLON WATER INTAKE STRUCTURE)

2021 ◽  
pp. 24-46
Author(s):  
I.L Koliabina ◽  
V.M. Shestopalov ◽  
N.B. Kasteltseva
Keyword(s):  
Water Quality ◽  
Chemical Composition ◽  
Ion Exchange ◽  
Water Withdrawal ◽  
Formation Mechanisms ◽  
Rock System ◽  
Water Composition ◽  
The One ◽  
Intake Structure

This paper presents the results of the assessment of interactions in the water-rock system using an integrated approach including the balance method and the method of geochemical (thermodynamic) modelling. Assessment is carried out for conditions of Cenomanian-Callovian and Bajocian aquifers within the Obolon groundwater intake structure in Kyiv. The results obtained demonstrate that groundwater of the Cenomanian-Callovian and Bajocian aquifers within the Obolon groundwater intake structure differ in chemical composition, physicochemical conditions, and especially in the formation of water composition due to the interactions in the water-rock system. This paper proposes division of water into groups, taking into account both the features of chemical composition and its formation process. The water group characterized by anomalous ratio of chlorine and sodium is distinguished, as well as the possible formation mechanism of this water composition is proposed. The chemical composition of the waters of both aquifers meets the requirements of Ukrainian legislation for drinking water quality (GSanPiN 2.2.4-171-10). Groundwater quality of the Cenomanian-Callovian complex is shown to be higher than that of the Bajocian aquifer. For both aquifers, the water of higher quality is the one with cationic composition determined largely by ion exchange. The ion exchange processes can be controlled to a certain extent by regulating the water withdrawal from the wells, and hence the water quality can be regulated in this way as well. Another way to regulate water quality could be the mixing of water from two aquifers during water treatment, which would, on the one hand, compensate the insufficient water quality of individual aquifers and, on the other hand, provide for continuous well operation contributing to the maintenance of more or less stable physicochemical processes. However, these hypotheses require further detailed consideration and, if confirmed, a detailed justification of their feasibility.

Water Quality of Lake Iskanderkul and Its Tributaries

2020 ◽  
Vol 6 (2) ◽  
pp. 79-88
Author(s):  
Z.O. Normakhmedova ◽  
◽  
A.V. Mitusov
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Chemical Composition ◽  
Fish Farming ◽  
Natural Phenomena ◽  
Change Dynamics ◽  
Chemical Composition Of Water ◽  
Study Results ◽  
Copper Zinc

This article presents the study results of the change dynamics in the chemical composition of water in Lake Iskanderkul and the rivers flowing into it, as well as the comparison of water quality in the water bodies of the Iskanderkul Basin and several mid-stream tributaries of the Zarafshan River. It was established that the chemical composition of water in Lake Iskanderkul and its tributaries meets the requirements of the corresponding state standard (GOST 2874-82 “Drinking Water”). However, in terms of dissolved oxygen, copper, zinc, lead and iron the water in Lake Iskanderkul does not satisfy fish farming requirements. The main water pollution sources in the area include such natural phenomena as floods, avalanches, mudslides, and rock dissolution.

scholarly journals Rainfall Distribution and the Possibility for Healthy and Fresh Drinking Water

2014 ◽  
Vol 4 (2) ◽  
pp. 22
Author(s):  
Alif Noor Anna
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Chemical Composition ◽  
Fresh Water ◽  
Sea Water ◽  
Rain Water ◽  
Rainfall Distribution ◽  
Water Composition ◽  
Water Chemical Composition ◽  
Coast Region

The information of rain water quality in Indonesia is rarely recorded, where as it is important for the region in which the source of fresh water is unavailable. Rain water composition is mostly ascertained by water vapour and ions which are available in the atmosphere during vapouration. In fact the rain water composition of coast region is sea water like and rain water chemical composition of urban are then become HNO3 and HSO4, while rain water of active vulcanic region eventuality has a high sulphur-wombed so that its quality sulphuric-acid. For the region in which the source of fresh water is unavailable the rain water is previously sterilized. Sterilization is consecutively done by adding salts, killing all bacteria, spores, and filltering.

scholarly journals Chemical composition and water quality of the Baikal ecosystem in 2018

2019 ◽  
Vol 320 ◽  
pp. 012030
Author(s):  
V I Grebenshchikova ◽  
M I Kuzmin ◽  
M Yu Suslova ◽  
Yu R Shtykova ◽  
A A Doroshkov
Keyword(s):  
Water Quality ◽  
Chemical Composition

scholarly journals Water quality assessment of the Triassic aquifer, SE Tunisia, for drinking water supply

2019 ◽  
Vol 98 ◽  
pp. 09002
Author(s):  
Meriem Ameur ◽  
Fadoua Hamzaoui-Azaza ◽  
Moncef Gueddari
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Chemical Composition ◽  
Water Samples ◽  
Geographical Information Systems ◽  
Water Quality Assessment ◽  
Geographical Information ◽  
Multivariate Statistical ◽  
Aquifer System

The Triassic aquifer is located in southereastern Tunisia, in the Medenine region, and being part of Jeffara's multilayer aquifer system. The aquifer is currently overexploited with an exploitation rate of 163%, which led to a generalized drop in the piezometric level in the order of 20 cm/year. This study applied conventional techniques such as hydrochemical compositions, multivariate statistical methods and Geographical Information Systems (GIS). To better identify the processes controlling the hydrogeochemical evolution of groundwater quality of Triassic aquifer and its suitability for drinking uses, 14 well water samples from the Triassic aquifer were analysed for physical character and chemical composition. In the groundwater, the respective order of cation and anion concentration was Na>Ca>Mg>K and SO4>Cl>HCO3. The chemical data of water samples from the study area presented by plotting on a Piper diagram reveals the predominance of two hydrochemical types: a Na-Ca-Mg-SO4 facies and a Na-Ca-Mg-Cl-SO4 facies. Analytical results demonstrate that the chemical composition of groundwater in Triassic aquifer is strongly influenced by residence time and flow path. Water quality deteriorates going from southwest to northeast across the region, coincident with the appearance a clay layer limiting the infiltration of rainwater. The majority of ions are above the maximum desirable limits recommended for drinking water by WHO guidelines and Tunisian Standards (NT.09.14). Based on the Water Quality Index (WQI), 36% of water samples of the Triassic aquifer are classified as "poor water" and they cannot be used for drinking purposes without prior treatment.

scholarly journals A new charophyte habitat with a stabilized good ecological potential of mine water

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Agnieszka Napiórkowska-Krzebietke ◽  
Andrzej Robert Skrzypczak
Keyword(s):  
Water Quality ◽  
Trace Elements ◽  
Mine Water ◽  
Trophic Conditions ◽  
Toxic Risk ◽  
Toxic Cyanobacteria ◽  
The One ◽  
Water Ecosystems ◽  
Ecological Potential

AbstractEach newly-created pond which is supplied with mine water gives the opportunity to study a unique ecosystem in context of possible conditions for biotic live. Therefore, this research aimed to assess a phytoplankton-based ecological potential against the trophic conditions and the risk of contamination with trace elements, and demonstrate the possibility to stabilize at least good water quality of a clarification pond. The gradual decrease in turbidity-related variables (including suspended solids and iron) and nutrients, on the one hand, and an increase in phytoplankton-related indicators, on the other hand, were the most evident. Besides, relative stability in trace elements (the best water quality class), trophic level (slightly eutrophic level) and ecological potential (maximum potential), and relative instability in sulfates and calcium were also recorded. The final stabilization of water habitat resulted in abundant growth of charophyte Nitella mucronata. This all suggested a new ecological opportunity for settlement of a rare species and important for biodiversity enhancement. Furthermore, the study revealed that a clarification pond did not pose any toxic risk from the elevated content of trace elements or the growth of toxic or potentially toxic cyanobacteria which is essential for proper functioning and management of water ecosystems.

scholarly journals Effect of the dehydration method of Hibiscus sabdariffa L. calyces on the quality of their aqueous extracts

2021 ◽  
pp. 159
Author(s):  
Yolanda Salinas Moreno ◽  
César Sánchez-Feria ◽  
María Del Carmen Ybarra-Moncada ◽  
Víctor Arturo González-Hernández ◽  
María Luisa Machuca-Sánchez
Keyword(s):  
Chemical Composition ◽  
Organic Acids ◽  
Titratable Acidity ◽  
Hibiscus Sabdariffa ◽  
Aqueous Extracts ◽  
Total Anthocyanins ◽  
Soluble Phenols ◽  
The One ◽  
Tropical Climates

Hibiscus sabdariffa L. is a plant from tropical climates, which produces, among other products, deep red calyces used to prepare refreshing drinks. The high humidity (85-87%) of the calyces at the time of harvest must be reduced to about 12% for handling and storage. The aim of the work was to evaluate the effect of the dehydration method of the calyces (sun drying, SD; air-drying, AD, at three temperatures: 50, 60 and 70 ºC) of three varieties of Hibiscus sabdariffa L. on the quality of their aqueous extracts. The quality was measured as a function of color), and chemical variables (titratable acidity, TA, total soluble phenols, TSP; total anthocyanins content TAC, and organic acids). The varieties used were Negra Quiviquinta (NQ) with dark red calyces, UAN-9 with light red calyces, and UAN-16, with white calyces. The dehydration method affected the quality of the extracts. The SD was the one that most affected the color and chemical variables. The color of the extracts was darker than that of the control while titratable acidity (TA) was reduced on average 40.6%. No effect of AD treatments was observed on these variables. On chemical composition, SD reduced TSP on average 15.3%, the most affected variety was UAN-16. In the varieties with red calyces, the average TAC reduction was 36.9%. Of the organic acids, the most affected were malic and succinic. As observed in physical variables, AD treatments showed little influence on chemical composition of calyces. Of the dehydration methods evaluated, the AD70°C rendered the best quality aqueous extract, in base of the variables evaluated.

scholarly journals Groundwater quality assessment of Dashtestan using WQI index in 2007

2021 ◽  
Author(s):  
Omid Memarian Sorkhabi
Keyword(s):  
Water Quality ◽  
Economic Development ◽  
Quality Index ◽  
Poverty Reduction ◽  
The Other ◽  
Groundwater Quality Assessment ◽  
Management Measures ◽  
Quality Of Water ◽  
The One

Abstract Water is a major source of economic development, social security and poverty reduction. The value of this resource on the one hand and its limitation on the other hand has led to increased management measures to maintain the quantity and quality of water by different communities. In this research, the water quality index (WQI) for the Dehroud and Tang Eram regions of Dashtestan in 2007 has been investigated. The average WQI in 2007 is 66,798. WQI was better off in the Northeast in 2007 than in the Southeast. The maximum values of PH, TDS and EC in 2007 are 7.9, 5000 and 7500, respectively.

scholarly journals COMPARATIVE HYGIENIC ASSESSMENT OF SURFACE WATER QUALITY OF WATER WITHDRAWAL POINTS IN THE ADMINISTRATIVE CENTRE OF THE REGION

2019 ◽  
Vol 7 (3) ◽  
pp. 366-372
Author(s):  
A.A. Litvinova ◽  
◽  
A.A. Dementiev ◽  
A.A. Lyapkalo ◽  
N.I. Karaseva ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Water Withdrawal ◽  
Quality Of Water

scholarly journals Efektivitas ekstrak daun pandanwangi sebagai insektisida nabati dalam mengurangi jumlah lalat selama penjemuran ikan patin asin

Jurnal Zona ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 42-49
Author(s):  
Hilyati Fadhlah ◽  
Feliatra Feliatra ◽  
Rahman Karnila
Keyword(s):  
Water Quality ◽  
Staphylococcus Aureus ◽  
Human Health ◽  
Research Methods ◽  
Leaf Extract ◽  
Statistical Test ◽  
Economic Conditions ◽  
The One ◽  
Service Data

The size of the fly population at the time of Salted Catfish production (SC) is one of theimportant problems that will have an impact on the health and deterioration of fish quality, as well ashaving an impact on socio-economic conditions. Flies are mechanical vectors for the transmission ofdiseases carried through microorganisms Staphylococcus aureus (S.aureus). To deal with this problemproducers use chemical insecticides which are sometimes used at inappropriate dosages, so that they willadversely affect human health and the environment. therefore it is used by Fragrant Pandan Leaves(FPL) which have chemicals as poisons for vectors and safe for humans. This study aims to identify thecontamination of S.aureus bacteria in SC from Penyasawan Village, to analyze the effectiveness of FPLextracts in reducing the number of flies in the process of drying the SC on product acceptance. Usingexperimental research methods, with RAL, it was carried out at the UPTD laboratory for fish diseasesand the water quality of the Kampar Regency Fisheries Service. Data were analyzed using the One-WayANOVA statistical test. The results showed that, for the most part Salted Catfish from PenyasawanVillage is identified contamination of Staphylococcus aureus bacteria. Pandan Wangi Leaf Extract caneffectively reduce the density of flies that perch during drying of Salted Catfish with the highestconcentration having the greatest resistance to the flies of flies. Salted Catfish soaked in Pandan Wangileaves are in demand by consumers

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