Chemical Composition of Water and Water Quality of the Dniester Reservoir

1999 ◽  
Vol 35 (2) ◽  
pp. 13-25
Author(s):  
L. V. Shevtsova ◽  
S. I. Kosheleva ◽  
Ye. N. Tsaplina
Keyword(s):  
Water Quality ◽  
Chemical Composition ◽  
Chemical Composition Of Water

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 Evaluation of the Quality of Chinese and Vietnamese Cassia Using LC-MS and Multivariate Analysis

2013 ◽  
Vol 8 (1) ◽  
pp. 1934578X1300800
Author(s):  
Ken Tanaka ◽  
Feng Li ◽  
Yasuhiro Tezuka ◽  
Shiro Watanabe ◽  
Nobuo Kawahara ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Multivariate Analysis ◽  
Chemical Composition ◽  
Herbal Medicine ◽  
Principal Component ◽  
The Other ◽  
Chemical Composition Of Water ◽  
Different Types ◽  
Marker Compounds

In the present study, the chemical composition of water extracts of Chinese and Vietnamese cassia (Cinnamomum cassia) were compared using multivariate analysis of LC-MS data. By principal component analysis of the LC-MS data, 6 compounds, cinnzeylanine (1), cinnzeylanol (2), anhydrocinnzeylanol (3), cinncasinol A (4), epicatechin (5) and procyanidin B2 (6), were identified as the marker compounds to characterize Chinese and Vietnamese cassia. It was clarified that Chinese cassia contains relatively larger amounts of epicatechin and procyanidin B2. On the other hand, Vietnamese cassia is characterized by a relatively larger amount of diterpenes. As catechin derivatives and diterpenes have different types of activity, it is important to choose the cassia that best suits the product for which it is to be used, whether in food or in herbal medicine.

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 Long-term dynamics of the water quality in the Rybinsk reservoir according to biotesting

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Roza A. Lozhkina ◽  
Irina I. Tomilina
Keyword(s):  
Water Quality ◽  
Chemical Composition ◽  
Industrial Wastewater ◽  
Agricultural Land ◽  
Rybinsk Reservoir ◽  
Aquatic Toxicity ◽  
Chemical Composition Of Water ◽  
The Rybinsk Reservoir

Long-term dynamics of the aquatic toxicity was studied in the Rybinsk Reservoir. According to the biotesting, the Volga and Sheksna reaches were the most polluted areas, which were exposed to household and industrial wastewater, as well as to the diffuse runoff from agricultural land and major highways. The relationships between the parameters of toxicity and indicators of the chemical composition of water were analyzed.

scholarly journals Quality of Qanat Water in Ganja-Kazakh Zone

2021 ◽  
Vol 7 (6) ◽  
Author(s):  
K. Allahverdiyeva
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Chemical Composition ◽  
Water Supply ◽  
Quality Indicators ◽  
Permissible Limit ◽  
Total Alkalinity ◽  
Specific Odor

The article is devoted to the issue of assessing the water quality of the qanats operating in the Ganja-Kazakh zone. It has been established that the salinity of the waters of the operating qanats varies from 0.3 to 0.94 g / l and their chemical composition is very favorable. The total alkalinity of qanat waters does not exceed the permissible limit and its value is 4–7 mg-eq/l, is transparent, does not have a specific odor, there are no heavy metals and other harmful ingredients in the water. The value of the irrigation coefficient is high and is 15–84. According to all quality indicators, the qanat waters are suitable for water supply and irrigation.

scholarly journals THE ANTROPOGENIC INFLUENCE ON CUEJDIU RIVER WATER QUALITY

2016 ◽  
Author(s):  
Florin Constantin MIHAI
Keyword(s):  
Water Quality ◽  
Rural Area ◽  
Rural Areas ◽  
Urban Areas ◽  
River Bed ◽  
Untreated Sewage ◽  
Chemical Composition Of Water ◽  
Urban And Rural Areas ◽  
The Village

Water pollution is caused in rural areas, especially by uncontrolled wastedeposits located in river bed and in urban areas is discharged, irregular,untreated sewage. The Cuejdiu River is a tributary of the Bitriţa River inthe left side,with a total length of 24 km. Evaluation of water quality of the CuejdiuRiver was achieved by processing the results obtained from tests analyzedfor 30 samples, taken on March 17, 2012, between the mouth of the RiverBestriţa and upto the exit of the village Cuiejdi. Analysis of water samples was performedin the laboratory of the Department of Geography, at the Faculty ofGeography and Geology and was taken into account several parameters such asconductivity, pH, total acidity, nitrates, chlorine. The values obtainedwere cartographically represented to highlight differences between thesector that cross of the rural area and the sector located in the urbanarea. Water Management System Neamţ realizes assessments of the ecologicaland chemical status of the river Cuejdiu only in urban areas, classifyingwater quality in relation to general indicators. Thus, data obtained over aperiod of 10 years, from 2000 to 2010, and performing through charts,helped us to observe the time evolution of water quality in the area. Theimpact of human activities is evident in both urban and rural areas. In theurban area the connections made by citizens, particularly those who live onthe ground blocks, to the rainwater system, instead of sewerage systems,lead to the degradation of water quality. As regards the rural area, thesituation is just as difficult, meaning that the waste discharged into theriverbed changes the chemical composition of water.

Dynamics of change monitoring of sanitary and chemical indicators of water quality in springs in the subarid region by the model of Saratov region

2020 ◽  
pp. 54-64
Author(s):  
Ksenia Aleksandrovna Savina ◽  
Dmitry Evgenievich Ivanov ◽  
Anatoly Nikolayevich Mikerov ◽  
Vladimir Fedorovich Spirin ◽  
Anton Valerievich Kosarev ◽  
...  
Keyword(s):  
Water Quality ◽  
Chemical Composition ◽  
Spring Water ◽  
Total Hardness ◽  
Saratov Region ◽  
Chemical Indicators ◽  
Alternative Sources ◽  
The Right ◽  
The City

Springs on the right Bank of the Saratov region can be considered as a predictive model of changes in the chemical composition of spring water in a warming climate. The 14 sources most demanded by the population were identified. The probable causes of the detected deviations in the investigated sanitaryhygienic indicators are also described. The research period is 2016–2019. The sources are located on the territory of the right Bank of the Saratov region, including the city of Saratov. We determined the flow rate and type of sources, the water temperature in them, the presence of captage and sanitary protection zones, the chemical composition of water in terms of smell, taste, color, turbidity, pH, total hardness, total mineralization, Cl, SO4 2-, NO3 , NO2 , NH3 , Pb2+, Cd2+, Fecom, Mncom, Crcom, Ascom. We found that 35 % of samples do not meet the requirements of sanitary standards. Deviations were detected in terms of color, turbidity, total hardness, manganese, chlorides, nitrates, and cadmium. The dynamics of changes in chemical indicators of water quality in all surveyed sources was studied. In 6 of them, from 2016 to 2019, an increase in the level of hardness and total mineralization was revealed. The highest concentrations of the studied substances were recorded in the spring period (flood). An increase in the concentration of manganese was observed in 6 sources. In one of them, in March 2017, the critical value of this indicator was recorded (22 MPC). The necessity of using springs by the population as alternative sources of water supply for drinking purposes is analyzed. To identify the demand for springs in the city of Saratov, a survey of 535 people was conducted directly at the sampling sites. The conducted survey of the population indicates the confidence of the population in the quality of spring water. The probable causes of the detected excess are described. A comparison of our results with available data from 2009–2016 indicates a deterioration in the water quality of the surveyed sources.

scholarly journals МНОГОЛЕТНЯЯ ИЗМЕНЧИВОСТЬ ХИМИЧЕСКОГО СОСТАВА И КАЧЕСТВА ВОДЫ НА ВСЕМ ПРОТЯЖЕНИИ РЕКИ АМУР

2019 ◽  
Author(s):  
A.A. Kovalenko
Keyword(s):  
Water Quality ◽  
Chemical Composition ◽  
The State ◽  
Amur River ◽  
Quality Of Water ◽  
Maximum Permissible Concentrations ◽  
Water Ecosystem ◽  
The Amur River ◽  
The Difference

В условиях антропогенного воздействия на окружающую среду и несбалансированного природопользования может происходить снижение самоочищающей способности реки Амур и ухудшение качества воды. Водопользование в бассейне реки осуществляется со стороны трёх государств: России, Монголии и Китая. Основными источниками поступления загрязняющих веществ в Амур с российской стороны являются предприятия деревообрабатывающей промышленности, машиностроение, цветная металлургия, добыча полезных ископаемых, производство электроэнергии. Снижение качества воды происходит также за счет недостаточной степени очистки сточных вод. Трансграничное положение изучаемого водного объекта, разница демографических потенциалов России и Китая и активное техногенное воздействие со стороны сопредельных территорий обусловливает актуальность настоящего исследования, целью которого является оценка многолетней изменчивости химического состава и качества воды на протяжении реки Амур. Исследование проведено на основе многолетних (20002017 гг.) гидрохимических данных Государственной системы наблюдений за состоянием и загрязнением окружающей среды Росгидромета в пунктах наблюдений на р. Амур: с. Черняево, гг. Благовещенск, Хабаровск, КомсомольскнаАмуре и НиколаевскнаАмуре. Рассмотрен химический состав воды на различных участках реки и проведена оценка качества воды по гидрохимическим показателям. Построены графики временной изменчивости значений удельного комбинаторного индекса загрязненности воды (УКИЗВ). Анализ многолетних данных показал, что на всех исследуемых участках реки концентрации хлоридов, сульфатов и нитратов не превышают предельно допустимые концентрации. Выявлены характерные загрязняющие вещества, содержание которых превышает нормативы ПДК более, чем в половине случаев. Это органические вещества, азот аммонийный, соединения железа, меди, цинка, никеля, марганца, фенолы и нефтепродукты. Наблюдается увеличение содержания некоторых загрязняющих веществ вниз по течению реки. В целом качество воды реки Амур на различных участках характеризуется 3м ( загрязненная и очень загрязненная ) и 4м классами качества ( грязная ). В динамике выражена общая положительная тенденция незначительного снижения уровня загрязненности воды.The title of the article is longterm variability of chemical composition and quality of water along the Amur river. As the title implies the article describes the chemical composition of water in different parts of the river and the water quality by hydrochemical parameters. A mention should be made that under the conditions of anthropogenic press on the environment and unbalanced use of natural resources, the ecological potential of the water ecosystem of the Amur River is depleted and the quality of water decreases. The transboundary position of the studied water object, the difference in the demographic potentials of Russia and China determines the relevance of this paper. The purpose of the work is to assess the longterm variability of the chemical composition and water quality along the Amur River. It should be noted that this research is based on longterm (20002017) Hydrochemical information. The state system of observers for the state and environmental pollution of Roshydromet at observation points along the river: c. Chernyaevo, the city of Blagoveshchensk, Khabarovsk, KomsomolskonAmur and NikolaevskonAmur. As a result, the analysis of longterm data showed that the concentrations of chlorides, sulphates and nitrates do not exceed the maximum permissible concentrations on all the studied river sections. Identified characteristic pollutants, the content of which exceeds the MPC standards in more than half of the cases. There is an increase in the content of some pollutants downstream of the river. In general, the water quality of the Amur River at different sites is characterized by the 3rd (polluted and very polluted) and 4th quality classes (dirty).

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