부산지역 먹는물공동시설의 자연방사성물질 분포 특성

Abstract

A total of 150 spring water fountains in Busan were investigated to identify the distribution characteristics of the natural radioactive materials radon and uranium. Radon was detected at levels from 0.0 to 120.7 Bq/L, with an average of 17.2 Bq/L and a median of 7.4 Bq/L, while uranium levels ranged from 0.0 to 2.1 ㎍/L, with an average of 0.1 ㎍/L and a median of 0.0 ㎍/L. Radon did not exceed the guideline level for Drinking water in Korea (148 Bq/L) while uranium did not exceed the Standards for Drinking water in Korea (30 ㎍/L). The spring water fountains in Busan were characterized by the presence of granite, volcanic, or sedimentary rock. Average radon and uranium levels were highest in granite, followed by sedimentary and volcanic rock, and the highest concentration was found in the granite area. Correlation analysis of the radon and uranium concentration showed significant correlation p<0.01. As to physicochemical water quality, showed positive correlation with fluoride in common. Compared to the public drinking water facilities in other areas, the Busan area contained radon and uranium at safe drinking levels. However, to provide residents with safer drinking water, frequent monitoring of elements not covered by water quality standards, such as natural radiation, is necessary for public drinking water facilities that take water from unsafe raw water sources.