Hydrochemical Characteristics and Formation of the Madeng Hot Spring in Yunnan, China
Table 1
Chemical analyses of the Madeng hot spring (mg/L).
Composition
YJ2
YJ2-A
K
11.4
17.9
Na
802
733
Ca
378
185
Mg
37.9
35.5
NH4
<0.02
0.701
Fe
0.116
/
HCO3
663
287
Cl
810
595
SO4
1.24 × 103
1.05 × 103
F
3.08
2.32
NO3
3.7
/
226Ra (Bq/L)
0.420
/
222Rn (Bq/L)
7.21
/
Ba
0.051
/
Cr (6)
<0.001
/
Pb
<0.0008
/
Mn
0.024
/
Al
0.060
/
Li
0.246
0.25
Sr
12.4
/
Br
0.17
/
I
<0.02
/
Zn
0.026
/
Se
0.0003
/
Ag
<0.0005
/
H2SiO3
35.6
/
HAsO3
0.016
/
HBO2
3.60
2.75
HPO3
<0.01
/
NO2
0.078
/
Free CO2
91.5
/
TDS
3.98 × 103
2.82 × 103
Total alkalinity
543
/
Total acidity
104
/
Total hardness
1.10 × 103
/
H2S
<0.05
/
pH
6.41
7.65
Temperature (°C)
42.1
42
YJ2 represents the sample collected in August 2014; YJ2-A represents the data recorded in the “Hot Springs’ Records in Yunnan Province’ Records” in 1999.
