ASSESSMENT OF GROUNDWATER QUALITY AND CONTAMINATION FROM URANIUM-BEARING BLACK SHALE IN GOESAN-BOEUN AREAS, KOREA

摘要

This study was initiated to identify the impact of metals and uranium enriched soil and black shale in groundwater quality and contamination. From a Piper diagram, groundwater was classified into four types as (Ca + Mg)-HCO_3 type, (Ca + Mg)-SO_4 type, the mixed type of these two and Na-HCO_3 type, reflecting the complicated nature of geology of the study area. Silicate weathering appeared to be the major water-rock interaction. In groundwater, metals including Cr, Pb, Cu and V, previously identified as being enriched in soils and black shale, were much lower in concentrations than Korean and US EPA drinking water guidelines.