국내 중금속 데이터를 이용한 지역별 배경농도 산정 및 오염도 평가

초록

It is essential to use specific background concentrations that reliably represent the characteristics of the area underevaluation. In this study, we analyzed the concentrations of heavy metals using the results of the 2022 surveys of the actualstate of soil contamination from 17 metropolitan governments. The overall national averages of natural backgroundconcentrations were obtained from the results of the 2021-2022 soil monitoring network and compared with that obtainedin previous studies. In addition, the natural, anthropogenic, and natural/anthropogenic background concentrations wereseparately obtained for each of the 17 metropolitan governments. The contamination factor (CF), one of the mostcommonly used soil pollution indices, was selected and applied to evaluate the soil contamination levels for the 2022survey results. Variations ranging from 0.3 to 1.4 times were obtained between the national average natural backgroundconcentrations from the 2021-2022 network and those from that commonly used in previous studies in Korea. Moreover,the natural and natural/anthropogenic background concentrations of each metropolitan government varied significantly. Compared to the cases using the national average background concentrations, the soil pollution level of the metropolitangovernments could be overestimated or underestimated when using the regional average background concentrations.

키워드