Samples

pH

COD (mg/L)

NH₄-N (mg/L)

${\text{PO}}_4^{\text{3}-}$ (mg/L)

simulated reinjection water

7.27 ± 0.08

6 ± 0.20

1.17 ± 0.07

0.06 ± 0.01

field geothermal water

7.75 ± 0.01

5.9 ± 0.06

0.93 ± 0.03

0.10 ± 0.01