Economic and Environmental Geology

Indexed in /covered by CAS, KoreaScience & DOI/Crossref:eISSN 2288-7962   pISSN 1225-7281

Table. 1.

Table. 1.

Sample number, mean, median, standard deviation, and range of pH, cation exchange capacity, organic matters, and the studied elements extracted with aqua regia and 0.01 M CaCl2, 0.11 M HOAc, 0.5 M HNO3, and 0.005 M DTPA + 0.01 M CaCl2 + 0.1 M TEA

Sample number Mean Median Standard deviation Range
pH 69 6.5 6.3 0.9 4.8~8.6
Cation exchange capacity (meq/100 g) 69 20.0 18.8 7.4 6.0~40.2
Organic matters (%) 69 4.2 3.5 2.6 1.0~15.0
Cd (mg/kg) Aqua regia 50 1.3 1.2 0.5 0.7~2.9
0.01 M CaCl2 50 0.2 0.2 0.0 0.1~0.3
0.11 M HOAc 50 0.7 0.7 0.1 0.5~1.0
0.5 M HNO3 45 0.4 0.3 0.3 0.2~1.3
DTPA* 50 0.3 0.3 0.1 0.2~1.0
Cr (mg/kg) Aqua regia 69 72.2 51.7 58.3 22.3~259.6
0.01 M CaCl2 0 n.d.
0.11 M HOAc 0 n.d.
0.5 M HNO3 66 1.7 1.4 1.5 0.0~7.3
DTPA 53 0.2 0.2 0.1 0.1~0.5
Cu (mg/kg) Aqua regia 69 36.0 25.7 40.8 3.6~273.6
0.01 M CaCl2 39 0.2 0.1 0.0 0.1~0.3
0.11 M HOAc 9 1.1 0.6 1.1 0.1~3.2
0.5 M HNO3 69 7.9 7.1 6.4 1.2~43.9
DTPA 65 3.4 2.8 2.6 0.2~13.8
Ni (mg/kg) Aqua regia 69 43.0 36.4 22.3 15.1~118.8
0.01 M CaCl2 8 0.1 0.1 0.1 0.0~0.4
0.11 M HOAc 1 0.6 0.6 0.6
0.5 M HNO3 69 2.0 1.6 1.5 0.2~7.8
DTPA 58 0.9 0.7 0.8 0.1~4.2
Pb (mg/kg) Aqua regia 69 71.1 69.7 15.1 28.1~122.3
0.01 M CaCl2 16 1.4 1.4 0.2 1.0~1.6
0.11 M HOAc 34 3.9 3.8 1.0 2.4~6.0
0.5 M HNO3 69 12.5 11.3 5.5 4.0~33.8
DTPA 55 4.1 3.4 2.3 1.6~11.3
Zn (mg/kg) Aqua regia 68 119.1 116.9 43.6 52.7~330.9
0.01 M CaCl2 56 2.7 2.6 1.2 1.7~9.4
0.11 M HOAc 28 21.0 14.4 13.5 11.1~59.8
0.5 M HNO3 67 18.4 11.9 17.5 2.7~84.8
DTPA 47 12.9 8.8 10.0 5.3~45.6

The values lower than detection limits were excluded.

DTPA* : 0.005 M DTPA + 0.01 M CaCl2 + 0.1 M TEA

Econ. Environ. Geol. 2021;54:259-69 https://doi.org/10.9719/EEG.2021.54.2.259
© 2021 Econ. Environ. Geol.