Table 3 Chemical composition of geothermal water used to synthesize mesoporous silica at well O-12R, Onuma geothermal power plant.

From: Synthesis of mesoporous silica from geothermal water

Dissolved species

Concentration (mg/L)

Na+

406

K+

41.2

Ca2+

15.5

Mg2+

 < 0.01

Fe2+

 < 0.01

Al3+

0.8

Cl−

431

SO42−

225

HCO3−

86

SiO2

475

pH

8.2

EC (mS/m)

201

  1. Data supplied by Mitsubishi Material Co. Ltd. Date of sampling: 2020/7/21.
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