Click here to donate to keep PhreeqcUsers open

SOLUTION 1 #formation watertemp 22pH 6units ppmNa 74051.65Ca 19680Mg 2916Cl 157520.42-water 0.05SOLUTION 2 #Sea watertemp 22pH 6units ppmNa 18328.3Ca 650Mg 2210S(6) 4290Cl 32695-water 0.05ENDUSER_GRAPH 1 -headings moles Gypsum Anhydrite -axis_titles "Na4EDTA added, moles" "Scale, mg/L" "" -initial_solutions false -connect_simulations true -plot_concentration_vs x -start10 gyp_mol = EQUI("Gypsum")20 gyp_mg_1000cc = (gyp_mol * GFW("CaSO4:2H2O") * 1000 / SOLN_VOL)30 anh_mol = EQUI("Anhydrite")40 anh_mg_1000cc = (anh_mol * GFW("CaSO4") * 1000 / SOLN_VOL)50 GRAPH_X RXN60 GRAPH_Y gyp_mg_1000cc70 GRAPH_Y anh_mg_1000cc -end -active trueEQUILIBRIUM_PHASES 1 Gypsum 0 0 Anhydrite 0 0MIX 1 1 0.5 #FRACTION 0.5 OF Formation water 2 0.5 #FRACTION 0.5 OF Sea waterREACTION 1 Na4Edta 1 0.02 moles in 10 stepsEND

Dear dlparkhurstI have the same problem. However, I could not find any data regarding the inhibitors' equilibrium constants.Would you please help me with this?There are lots of antiscalants, such as AA-AMPS / HPAA / ATMP / PAA / HEDP / PBTC / PAPEMP / DTPMPA / PESA / PASP ...Appreciate your time and considerationHiDid you find a way to input the inhibitor data to phreeqc?