Jicheol Kwon1·Goontaek Lee1*·Myungchae Jung2·Jeong-wook Kim2·Jeong-ki Yoon3 Hyun-Koo Kim3·Ji-in Kim3·Honggil Lee3·Inja Kim3·Taeseung Kim1·Jiyoung Kang1
1NICEM, Seoul National University
3National Institute of Environmental Research
1서울대학교 농업생명과학대학 농생명과학공동기기원
This study evaluated the relative extraction ratio (RER) of As and heavy
metals (Cd, Cu and Pb) in paddy soils using the two types extractant, 0.05 M EDTA and
0.43 M HNO3. The RER was calculated by
dividing the concentrations of metals obtained by 0.05 M EDTA or 0.43 M HNO3
extraction by those obtained by aqua regia extraction. The RER of 0.43 M HNO3
was larger than that of 0.05 M EDTA.
Correlation analysis indicated there was statistically significant correlation
(p<0.001) between the concentration in aqua regia and 0.05 M EDTA or 0.43 M HNO3.
Especially, Cd showed the higher correlation than other metals. Stepwise
multiple linear regression analyses indicated soil pH, CEC, organic matter
content, and soil texture all influenced the metal extraction rates and
bioavailability of the metals.
Keywords: Soil, Relative extraction ratio (RER), Extractability, Arsenic, Heavy metal
2019; 24(6): 1-8
Published on Dec 31, 2019
NICEM, Seoul National University