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Table 1 Geochemical and physical parameters of SHP hot spring water

From: Metabolic characteristics of dominant microbes and key rare species from an acidic hot spring in Taiwan revealed by metagenomics

Parametera

Current study

Song et al., 2005b [21]

pH

2.5

2.77 – 3.25

Temperature (°C)

69.0

49.8 – 85.1

TDS

707

177 – 1674

EC (μS/cm2)

1760

266 – 1039

ORP (mv)

−62

DOC

1.0

HCO3 2−

<0.03

L

NO3−

L – 0.9

PO4 3−

L

Cl and other halides

9.3

L (F) / 4.93 – 10.3 (Cl) / L – 3.78 (Br)

SO4 2−

378

100 – 450

S0

0.50

H2S

52.7

S2O3 2−

0.12

Fe2+ and Fe3+

111

1.8 – 54.9 (Fe2+)

Ca2+

1.32

5.8 – 977

Na+

12.0

L – 13.4

Mg2+

1.21

1.21 – 9.70

K+

2.17

1.40 – 6.00

Al3+

19.0

0.70 – 17.3

Total As

0.0012

  1. “L” represented concentrations below detection limits
  2. TDS total dissolved solids, EC electrical conductivity, ORP oxidation/reduction potential, DOC dissolved organic carbon
  3. aUnits were mg/L for all end points except pH
  4. bSource: Geological survey and potential application of hot springs and geothermal energy of Yangmingshan (in Chinese); monthly report of environmental parameters in the SHP acidic hot springs in 2005