The quality of drinking water supply in Samara

Sazonova, Olga V.; Викторовна, Сазонова Ольга; Ryazanova, T. K.; Константиновна, Рязанова Татьяна; Tupikova, D.S.; Сергеевна, Тупикова Дарья; Sudakova, T.V.; Викторовна, Судакова Татьяна; Vistyak, L.N.; Николаевна, Вистяк Людмила; Toropova, N.M.; Михайловна, Торопова Наталья; Соколова, И. В.; Владимировна, Соколова Ирина

doi:10.17816/snv202093119

Cited by 3 publications

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“…Выявленные в ходе исследования превышения ПДК кадмия, никеля и свинца в питьевой воде могут быть обусловлены высоким уровнем износа водопроводной сети (более 67%), и как следствие, повышенной аварийностью, приводящей к её вторичному загрязнению [13,14]. В тоже время нельзя исключать возможность миграции свинца в питьевую воду в результате коррозии стальных труб, эксплуатируемых свыше нормативного срока, а кадмия -из полимерных труб [14,15]. В тоже время по данным Алексеевой, и др.…”

Section: Discussionunclassified

Comparative Hygienic Assessment of Qualitative Composition of Drinking Water of Centralized Water Supply System in Certain Districts of Ryazan

Litvinova,

Dement'yev,

Tsurgan

et al. 2023

НМJ

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INTRODUCTION: Providing the population with drinking water that meets national standards is one of the urgent problems. In connection with the use of ground and surface waters for water supply in Ryazan and their different proportions in the water supply system, the quality of drinking water in individual districts of the city may have special features. AIM: Comparative hygienic assessment of the qualitative composition of drinking water of the centralized water supply system in the residential districts of Ryazan. MATERIALS AND METHODS: The results of laboratory quality control of drinking water of central water supply system for the period from 2012–2021 were analyzed according to the monitoring data of the Center for Hygiene and Epidemiology in the Ryazan Region. The calculation of the average many-year concentrations and the percentage of samples that do not meet hygienic requirements, was carried out. For statistical processing, the method of analysis of variance and Scheffe and Tamhein tests for paired comparisons were used, taking into account the results of Levene test. Statistical parameters were calculated in SPSS Statistics 19 software. RESULTS: Excess hardness of drinking water was recorded in all districts of the city, with the proportion of such samples ranging from 0.8% (Solotcha) to 74.1% (Stroitel). The average value of the total water hardness in Stroitel district was the highest, 7,554 mg-eq./l, exceeding the hygienic norm. In most districts, with the exception of Kanishchevo, Diagilevo, Zheleznodorozhny and Sovetsky, water samples (0.9–2.7%) were recorded that did not meet hygienic requirements for the content of generalized and thermotolerant coliform bacteria. The average many-year concentration of iron (2+) in the drinking water of the centralized water supply system of the village of Solotcha 2.5 times exceeded the MPC (0.3 mg/l) and was significantly higher than in the compared territories, and in 64.6% of samples its one-time concentrations did not correspond to the hygienic norm. In the territories of the districts: Dashkovo-Pesochnya, Kanishchevo, Mirny, Sovetsky and Zheleznodorozhny, the proportions of water samples with one-time concentrations of aluminum exceeding the MPC (0.2 mg/l) ranged from 1.5% (CI 95%; 0.3–8.2%) to 6.1% (CI 95%; 2.4–14.6%). One-time concentrations of boron above the MPC (0.5 mg/l) were recorded in drinking water in all districts of the city with the exception of Diaghilevo and Oktyabrsky, and ranged from 1.0% (CI 95%; 0.2–5.2%) to 1.9% (CI 95%; 0.52–6.68%). The average many-year concentration of cadmium in the drinking water of Dashkovo–Pesochnya residential area was 0.0006 mg/l and 1.9-14 times exceeded that in other districts of the city (p < 0.05), while the proportion of water samples where one-time concentrations of this toxicant exceeded the MPC (0.001 mg/l) was 4.7%. Also, cadmium concentrations exceeded the hygienic standard at the control points of water supply network in Mirny (in 2.9% of samples), Sovetsky and Zheleznodorozhny districts (0.9% of samples in each). One-time concentrations of nickel most often exceeded the respective MPC (0.02 mg/l) in the drinking water of Dashkovo-Pesochnya and Solotcha residential areas making 10.9% (CI 95%; 4.7–23.0%) and 11.1% (CI 95%; 4.8–23.5%), respectively, and least often of Mirny and Moskovsky areas — 2.2% (CI 95%; 0.4–1.3%) (p > 0.05). CONCLUSIONS: The territorial features of the qualitative composition of drinking water of the centralized water supply system of the city of Ryazan are determined, consisting in higher average values of individual parameters and the percentages of samples that do not meet hygienic standards for hardness in Stroitel, Sovetsky, Zheleznodorozhny and Dashkovo-Pesochnya districts; for the content of sanitary-indicative microorganisms — in Stroitel, Dashkovo-Pesochnya, Mirny and Oktyabrsky; for the iron content (2+) — in Stroitel, Zheleznodorozhny, Oktyabrsky, Kanishchevo and Solotcha; for boron — in Stroitel; for cadmium — in Dashkovo-Pesochna and Mirny; for nickel — in Dashkovo-Pesochna and Solotcha; for lead — in Stroitel and Mirny.

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Section: Discussionunclassified

Comparative Hygienic Assessment of Qualitative Composition of Drinking Water of Centralized Water Supply System in Certain Districts of Ryazan

Litvinova,

Dement'yev,

Tsurgan

et al. 2023

НМJ

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Assessing quality of drinking water supply in different regions of the Russian Federation

Sazonova

Tupikova

Ryazanova

et al. 2022

Российский Вестник Гигиены

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The main task of any country associated with sanitary and epidemiological welfare of population is to obtain drinking water of good quality. In the majority of regions of the Russian Federation, quality of water taken from water sources and water supply systems is still unsatisfactory. As far as the extent of human impact on the environment goes, the Samara region is an ecologically unfavorable part of the Volga region. With the accession of the Republic of Crimea to the Russian Federation, the problem of water supply here has been intensified and the question of whether the drinking water corresponds to Sanitary Rules and Regulations 2.1.3685–21 and Sanitary Rules and Regulations 2.1.3684–21 arose. The purpose of the study is to analyze quality of drinking water supply in the regions of the Russian Federation. Drinking water samples taken from the centralized domestic water supply system in the Samara urban district and Republic of Crimea were analyzed using 20 sanitary and chemical parameters. Quality of drinking water doesn’t correspond to the requirements for oil products in all samples; the average value of this parameter exceeded the maximum permissible limit by 0.18 mg/dm3 in the Samara urban district and by 0.04 mg/dm3 in the Republic of Crimea, all the other parameters were within normal limits. However, during the comparative analysis quality of drinking water in the Republic of Crimea was insignificantly better than in the Samara urban district. Quality of drinking water is determined with the source of drinking water supply (surface and underground). Thus, to make the prepared drinking water normal, a respective water treating is necessary. Bad condition of water supply pipes can also produce a negative impact on quality of water obtained by a consumer.

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Comparative Analysis of Natural and Synthetic Zeolite Filter Performance in the Purification of Groundwater

Meiramkulova

Kydyrbekova

Devrishov

et al. 2023

Water

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Zeolite materials are among the relatively cheap and readily available materials for wastewater treatment. However, the performance of zeolite-based systems can be highly affected by the material properties. In this study, the treatment system based on natural zeolite materials from Chankanai mines in Kazakhstan was compared with a synthetic zeolite treatment system for the purification of groundwater. Water quality indices were also developed from a set of selected water quality parameters to further assess the state of water quality of raw groundwater and the effluents treated with natural and synthetic zeolite. The lowest removal efficiency of natural zeolite (30%) was observed with zinc, while the lowest removal efficiency (36%) of synthetic zeolite was observed with arsenic. With turbidity and beryllium, we observed the maximum removal efficiency (100%) of natural zeolite, whereas with turbidity, we observed the highest removal efficiency (100%) of synthetic zeolite. When the groundwater samples were put through the natural zeolite treatment system, removal efficiency of 50% and above was obtained with 27 (79.4%) out of the 34 water quality parameters examined. On the other hand, when the groundwater samples were put through the synthetic zeolite treatment system, more than 50% removal efficiency was attained with 30 (88.2%) out of the 34 water quality parameters studied. The aggregated water quality index of raw groundwater was 3278.24, falling in the “water unsuitable for drinking” category. The effluent treated with natural zeolite generated 144.82 as a water quality index, falling in the “poor water” quality category. Synthetic zeolite generated 94.79 as a water quality index, falling in the “good water” quality category. Across the board, it was shown that the synthetic zeolite treatment system outperformed the natural zeolite treatment system according to a number of water quality parameters. The findings of this study offer substantial knowledge that can be used to develop more efficient groundwater treatment technologies.

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The quality of drinking water supply in Samara

Cited by 3 publications

References 0 publications

Comparative Hygienic Assessment of Qualitative Composition of Drinking Water of Centralized Water Supply System in Certain Districts of Ryazan

Comparative Hygienic Assessment of Qualitative Composition of Drinking Water of Centralized Water Supply System in Certain Districts of Ryazan

Assessing quality of drinking water supply in different regions of the Russian Federation

Comparative Analysis of Natural and Synthetic Zeolite Filter Performance in the Purification of Groundwater

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