TITLE Example 1.
SOLUTION 1
-units mg/l
Temp	8
pH 2.79
redox Fe(+2)/Fe(+3) # uses activities of Fe(+2)/Fe(+3) for pe
Ca	390
Mg	1600
Na	50
K	120
S(6) 12000
Al	10
Fe(+2)	2000
Fe(+3)	220
Li	1
Cu	40
Zn	40
Pb	4
Ni 40
EQUILIBRIUM_PHASES
O2(g) -0.68 #  P_gas = 10^-0.68
CO2(g) -2.0  #[P_CO2] = 10^-2.0
Gypsum 0.0   # SI = 0.0; inital amount = 0 mol
Fe(OH)3(a) 0.0 0.0 # SI = 0.0; inital amount = 0 mol
Portlandite 0.0 0.01 # SI = 0.0; inital amount = 0.01 mol
END