Environmental monitoring of water quality in the interstate Ural river

Davaeva

et al. 2022

J. Phys.: Conf. Ser.

The article presents the data of the environmental assessment of the degree of contamination of drinking waters of Kalmykia. The assessment based on analyses of drinking waters of the republic’s districts, monitoring of drinking sources for 10 years, calculation of pollution coefficients. Today, 45 settlements of the republic, where 70.2% of the population of Kalmykia lives, provided with centralized and mixed drinking water supply. Residents of 140 settlements with a population of 60 thousand people (20.5% of the total population) in 4 districts (Iki-Burul, Priyutnensky, Oktyabrsky, Yashkulsky, Lagansky districts) are provided with imported water and delivered by special water carriers, water is delivered by rail from Dagestan to Ulan-Hall station. As representative indicators, the ratio of calculations of the values of excess of MPC by macro- and microelement composition was chosen. The results obtained rank the SRM by water quality class as, very clean in three rural municipalities (SRM), moderately dirty make up the majority - nine SRM, polluted and dirty - three SRM. This assessment of water quality coincides with the assessment of water exceeding the standards for individual indicators. A high value of this indicator indicates possible sources of pollution.

Section: Resultsmentioning

confidence: 99%

Assessment of the quality of drinking water of the Republic of Kalmykia by trace element composition

Davaeva

et al. 2022

J. Phys.: Conf. Ser.

“…Several newspapers have reported the occasional use of Shagan river water (site #2) as a drinking water source due to groundwater deficit. 1 Namely, residents of the Oktyabrsky village reported using surface water throughout 2019. It is not feasible to determine the frequency of direct water consumption from the river; therefore, risks associated with regular water drinking were calculated to demonstrate potential human health risks.…”

Section: Drinking Pathwaymentioning

confidence: 99%

“…With a length of 2428 km, the Ural River starts in the Russian Federation, crosses the western part of the territory of Kazakhstan, and reaches the Caspian Sea. 1 It flows through the main industrial cities of Russia and two big cities in Kazakhstan, Uralsk and Atyrau, providing multipurpose water sources and recreational spots for residents.…”

Section: Introductionmentioning

confidence: 99%

“…Over 20 billion tons of industrial waste has been discharged and accumulated in the Ural River basin, with heavy metals, organic substances, and oil products being the primary water pollutants. It has also been investigated that the contents of copper and zinc in the Ural River exceeded the Kazakhstani water pollutant standards by 1.5–6.3 times . Wastewater discharged from industries near Atyrau has been reported to contain chlorides, sulfates, and nitrates that exceed acceptable water standards.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Water Chemistry, Source Identification, and Health Risk Assessment in Surface Water of the Ural River

Yessenbayeva,

Turdiyeva,

Ramazanova

et al. 2024

ACS EST Water

Health risk assessment of the surface water of the Ural River draws specific interest as the river has been providing recreational sites for many citizens. Therefore, the exposure assessment scenario for most of the investigated sampling sites was based on dermal contact during swimming, with rare cases of direct drinking of the Shagan River water. Results from the swimming path demonstrated that the noncarcinogenic risks were insignificant. In contrast, carcinogenic risks exceeded the threshold values and could have an accumulative effect on the population's health, with Ni having the most significant contribution (up to 80% of the total cancer risk). Cancer risks remained within the range of 5.39 × 10 −7 −5.22 × 10 −5 . SO 4 , Cl, and Ca were the dominant ions due to natural processes in the water, such as weathering and crystallization. In contrast, principal component analysis (PCA) showed that local enterprises, such as metalworking plants and mines, were potential sources of heavy metal contamination of the river. The study could raise awareness about potential hazards that heavy metals may cause to the health of Kazakhstan citizens, and in the future, this study's results can be applied to introducing stricter environmental standards for industrial heavy metal emissions.

“…The formation waters of the subsalt part of the section (deposits of carboniferous and Lower Permian age) were studied in the Desert and Karaton areas adjacent to Tengiz, where they are represented by strong brines, the mineralization of which reaches 320 g/l. Hydrogeological data on the Karaton area, characterizing the section from the Tournaisian to the Lower Permian age, indicate the hydraulic connection of this range of deposits [8]. In the stratigraphic section of the Tengiz deposit, two hydrogeological floors are distinguished: the upper one is above-salt and the lower one is below-salt [9].…”

Section: Introductionmentioning

confidence: 99%

Chemical Analysis of Groundwater and Wastewater in the Area of the Tengiz Deposit of the Atyrau Region of the Republic of Kazakhstan

Nursaule¹,

Yessenamanova²,

Kossarbay³

et al. 2022

IJDNE

This article analyzes the content of the chemical composition of groundwater and wastewater of the Tengiz deposit located in the Zhyloy district of Atyrau region of the Republic of Kazakhstan. This analysis is necessary to determine the deposition of inorganic salts in oilfield equipment. The analysis shows that the content of chloride anions and magnesium cations prevails in groundwater and wastewater. Thus, the content of chloride anions exceeds the content of other anions up to 2-3 times of sulfate anions in groundwater and wastewater and up to 2.5-5 times of bicarbonate anions in groundwater and 17-27 times in wastewater. Among the cations, the maximum values are characteristic of magnesium cations, whose content exceeds the calcium content by more than 3.5 times in wastewater and more than 6.5 times in groundwater. In addition, the magnesium content exceeds more than 5 times the content of the sum of sodium and potassium ions. Thus, according to the results of the study, it was determined that the main salts affecting the oilfield equipment at the Tengiz field are magnesium chloride salts.