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Assessment of groundwater quality using statistical analysis in Incheon - focused on Gangwha area -
Hee-jong Yoo(유희종),Young-min Cho(조영민),Hye-rin Cho(조혜린),Sung-eun Min(민성은),Ji-hong Seong(성지홍),Hyun-sup Ha(하현섭),Mun-ju Kwon(권문주) 환경독성보건학회 2021 한국독성학회 심포지움 및 학술발표회 Vol.2021 No.5
Naturally occurring radioactive materials (NORM) is widely distributed in groundwater of granite areas. Drinking of groundwater containing NORM such as uranium and radon is highly harmful to human health. The aim of this study is to determine the characteristics of groundwater quality with NORM and geostatistical analysis. Groundwater samples from 37 wells were collected and measured on 24 items of drinking water quality standards including radon and uranium in 2020. The average concentrations of uranium and radon in groundwater were the highest in granite area. Principal component analysis (PCA) showed that PC1 was highly enriched with Na<sup>+</sup>, K<SUP>+</SUP>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, Cl<sup>-</sup>, SO<sub>4</sub><sup>2-</sup>, NO<sub>3</sub><sup>-</sup>, HCO<sub>3</sub><sup>-</sup> and Sr (40.6 %) strongly associated with soluble ion materials. Both PC2 with F<sup>-</sup>, U and Gross alpha (20.3 %) and PC3 with Rn (8.5 %) was related to NORM. PC4 was enriched with Zn (7.0 %). Cluster analysis (CA) revealed three subgroups showing high relationship between Na<sup>+</sup> and Cl<sup>-</sup> of main soluble ion constituents in seawater. This study coupled with statistical analysis is expected to imply appropriate contamination control management for safety of drinking groundwater.