Assessment of hydrochemical characteristics and heavy metal pollution index in groundwater in the Gorkhi-Terelj of Nalaikh District, Mongolia
- DOI
- 10.2991/978-94-6463-278-1_10How to use a DOI?
- Keywords
- Hydrochemistry; mineralization; drinking water; fluoride; heavy metals; arsenic; uranium
- Abstract
The study described in this article aimed to assess the hydrochemical characteristics and heavy metal pollution index of groundwater in the Gorkhi Terelj of Nalaikh district, located in the northeast part of Ulaanbaatar, Mongolia. In this study, we have used 91 groundwater samples, which were collected in 2020. In recent years, tourism has been developing rapidly in this region of Gorkhi Terelj National Park and the tour companies and enterprises in this area are using groundwater for all purposes. Thus, by conducting a research on the quality and composition of groundwater of the region will be significant importance on providing fresh and safe drinking water supply to foreign and domestic tourists. We determined physicochemical and microelement parameters in the selected wells and the results were compared to the Mongolian drinking water standard MNS0900:2018 and WHO 2011. According to our studies the predominant hydrochemical type of groundwater was Ca-HCO3 (97.8%). In the case of mineralization, about 67% of groundwater wells showed very fresh, and 32.9% was fresh. However, in the case of hardness, 47.2% was very soft, 35.1% was soft, and 17.5% was medium-hard. The most of the microelements were found below the standard levels. But some heavy metals were very high. The uranium concentration varied from 0.073 to 642 μg/L; it surpassed the WHO drinking water standard (30 μg/L) at 30.7% of sampling sites. The concentration of arsenic (As 0.19-49.5 μg/L) in 6 water samples was 1.45-4.95 times higher than the WHO level and MNS0900:2018 standard level, molybdenum (Mo 0.2-77.5 µg/L) was 1.1 times higher in 1 sample, and manganese (Mn 6.0-1599 mg/l) was 1.1-15.9 times higher in 6 water samples. The groundwater quality was calculated with a heavy metal pollution index (HPI). Calculation of the heavy metal pollution index (HPI) showed that 62.6% of the samples showed “very good”, “good” (19.7%; HPI 26.67-50.72), “poor” (7.69 %; HPI 52.19-74.81), “very poor” (1.09%; HPI 88.21), and 8.79% of the samples showed unsuitable for drinking purpose (HPI 110.4-304.9).
- Copyright
- © 2023 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Cite this article
TY - CONF AU - Erdenetsetseg Tsogtbayar AU - Nyamsuren Baljinnyam AU - Byambasuren Zorigt AU - Gerelt-Od Dashdondog AU - Turbat Batsaikhan AU - Renchinbud Badrakh PY - 2023 DA - 2023/10/29 TI - Assessment of hydrochemical characteristics and heavy metal pollution index in groundwater in the Gorkhi-Terelj of Nalaikh District, Mongolia BT - Proceedings of the Fourth International Conference on Environmental Science and Technology (EST 2023) PB - Atlantis Press SP - 89 EP - 103 SN - 2352-5401 UR - https://doi.org/10.2991/978-94-6463-278-1_10 DO - 10.2991/978-94-6463-278-1_10 ID - Tsogtbayar2023 ER -