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http://dx.doi.org/10.15681/KSWE.2016.32.5.442

The Study on the Ion Water Characteristics of Raw Water in the Domestic Natural Mineral Water  

Lee, Leenae (Water Supply and Sewerage Research Division, National Institute of Environmental Research)
Ahn, Kyunghee (Water Supply and Sewerage Research Division, National Institute of Environmental Research)
Min, Byungdae (Water Supply and Sewerage Research Division, National Institute of Environmental Research)
Yang, Mihee (Water Supply and Sewerage Research Division, National Institute of Environmental Research)
Choi, Incheol (Water Supply and Sewerage Research Division, National Institute of Environmental Research)
Chung, Hyenmi (Water Supply and Sewerage Research Division, National Institute of Environmental Research)
Park, Juhyun (Water Supply and Sewerage Research Division, National Institute of Environmental Research)
Publication Information
Abstract
The goal of this study is to provide basic data to establish a foundation for the provision of safe drinkable water. The raw water of natural mineral water was analyzed to determine the quantities of anions (F-, Cl-, NO3-N-, and SO42- ) and cations (Ca2+, K+, Mg2+, and Na+) during the former and latter half of 2016. Analysis of the current quality of the raw water of natural mineral water among domestic manufacturers showed average anions contents of 0.46mg/L of fluorine, 8mg/L of chlorine ion, 1.5mg/L of nitrate nitrogen, and 12mg/L of sulfate ion. While the fluorine content was greater than the water quality criterion of 2.0mg/L at four points, the fluorine level was overall stable. The average cations contents included 21.3mg/L of calcium, 1.0mg/L of potassium, 3.4mg/L of magnesium, and 9.6mg/L of sodium. The chemical characteristics were compared among the major ions, and the results are presented in a piper diagram. The content ratio of cations was in the order of Ca2+> Na+>Mg2+>K+, whereas that of anions was in the order of SO42->Cl->NO3-N->F-. While the cations were slightly scattered, the anions were generally concentrated except for at a few points. The Ca-Na-HCO3 type was dominant overall in water sources from diorite, gneiss, and granite, while the Na-Mg-Ca-HCO3-Cl type was dominant in basalt sources. Mineral water manufacturers source their water under various conditions, including in-hole casing, excavation depth, and contact state of bedrock; even within the same rocky area, some differences in the water quality type can occur. When the depth of the water source was taken into account, the mean anions contents of F-, Cl-, NO3-N-, and SO42- were similar, with no significant differences according to depth. Of the cations, K+ and Na+ showed no significant differences across all the tubular wells, whereas Ca2+ and Mg2+ decreased in content with depth.
Keywords
Cation and anion concentration; Mineral; Natural mineral water; Piper-Diagram; Water types;
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