Evaluation of geogenic sources using major ions, potential harmful trace elements, and natural organic matter of various drinking water sources in South Korea
Abstract
To evaluate the characteristics and spatial distribution of Korea's well-known water sources, we conducted a hydrogeochemical study using dissolved inorganic constituents and natural organic matters in hot spring, spring water, groundwater, and community spring. The basic information for water sources and water quality parameters including major elements(15), trace elements(48), and dissolved natural organic matter were investigated and analyzed to construct database for total 178 water sources. Piper diagrams and Box-whisker plots were used to identify the hydrogeochemical characteristics and spatial correlation between bedrock geology and water quality. Mineralized waters with high EC, Ca, Mg, and HCO3, which were mainly come from the dissolution of carbonate minerals, were observed at limestone and dolomite distribution area of eastern part of the South Korean. Sulphate(SO4) volcanic and sedimentrary(mudstone) rocks, which was thought to be due to the oxidation of pyrite aor the dissolution of gypsum. Fluorine was mainly found in hot spring water and deep groundwater which was mainly due to the effects of mineralization and weathering of biotite in granitic rocks. Chloride and nitrate ions are high in the western part where spatially flat land develops, and it is highly likely to be an artificial pollution source according to agriculture and housing. Potentially toxic and harmful elements(Li, V, Ba, and Mo) were observed several water sources, which were considered to be geogenic origin caused by the dissolution of host rock. From the fluorescence analysis(3D EEM) of natural organic matter, it was found that protein-like material were most commonly observed in water sources. Observations of strong peaks of humic and fulvic acids indicated the mxing of shallow groundwater and surface water.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMGH23B1238K
- Keywords:
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- 0240 Public health;
- GEOHEALTH;
- 1831 Groundwater quality;
- HYDROLOGY;
- 1847 Modeling;
- HYDROLOGY;
- 1880 Water management;
- HYDROLOGY