Selected data

Water sample

Mass transfer: Pr1 Þ Pr15

Pr1

Pr15

SI_Albite

−4.54

−1.86

D(SI) = 2.68

(Albite dissolution = 2.667E−01 mmoles)

D(Na⁺): +9.23 mg/L (0.40 mmol/L)

SI_Calcite

−4.49

−0.53

D(SI) = 3.96

(Calcite dissolution = 1.578E+00 mmoles)

D(Ca²⁺): +86.32 mg/L (2.16 mmol/L)

SI_Dolomite

−9.28

−1.58

D(SI) = 7.70

(Dolomite dissolution: 5.38 E−01 mmoles)

D(Mg²⁺): +12.96 mg/L (0.53 mmol/L)

SI_Gibbsite

−1.11

−2.16

D(SI) = −1.05

(Gibbsite precipitation: 2.67E−01 mmoles)

D(Al³⁺): −0.019 mg/L (−0.0007 mmol/L)

−2.21

−1.04

D(SI) =1.17

(CO_2(gas) dissolution: 6.24E+00 mmoles)

D(C/alkalinity as CO₂): +393.87 mg C/L (+8.95 mmol C/L)

Balance calculation for total alaklinity

Change in alkalinity along flow path Pr1 → Pr15: (): +334.10 mg/L (+5.48 mmol/L)

released from (Calcite + Dolomite) dissolution: 2.15 + 2*0.53 = 3.21 mmoles/L (192.60 mg/L)

D() from dissolution of CO₂ (g) (H₂CO₃H⁺+ ): 5.48 - 3.21 = 2.27 mmol/L (99.88 mg/L)

Alkalinity balance: 192.60 mg C as + (2*99.88 mg C as) = 392.36 mg C/L (8.91 mmol C/L)