PHREEQC Users | Resource for geochemists

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Subject / Started by	Replies / Views	Last post
Useful resource for rate parameters Started by Tom	4 Replies 24902 Views	19/12/25 11:26 by Tony_Appelo
Unit conventions for KINETICS and RATES parameters Started by Tom	2 Replies 25632 Views	21/07/20 21:34 by dlparkhurst
Principles of changes in pH and O2 Started by Rensburg	5 Replies 1020 Views	08/04/26 13:32 by Rensburg
Simulation of nitrification and denitrification in porous soil Started by Rensburg	10 Replies 1669 Views	05/04/26 02:21 by Rensburg
Seeking advice on model setup Started by Rumple	8 Replies 4925 Views	24/02/26 00:36 by Rumple
Calcite and Ca changes in sandstone-mussel combination Started by Hanif_Santyabudhi_Sutiyos	5 Replies 5435 Views	28/01/26 15:59 by dlparkhurst
validation the implementation of pitzer model Started by Aroua	1 Replies 8843 Views	09/12/25 20:58 by dlparkhurst
Methane kinetic Started by Hamed	1 Replies 9254 Views	06/11/25 03:42 by dlparkhurst
The rate settings of the ex15 Started by Doo	1 Replies 9408 Views	21/11/25 17:57 by dlparkhurst
nonequilibrium transport model in rate module Started by bannings	1 Replies 10598 Views	06/07/23 16:19 by dlparkhurst
Dissolution reaction kinetics for Birnessite Started by sabber	0 Replies 10662 Views	22/03/23 05:12 by sabber
Dividing a column into more cells preserving kinetic behaviour - A0/V Started by peterwadeuk	1 Replies 10670 Views	27/07/18 16:00 by dlparkhurst
Discrepancy between Kinetic Delta Moles and moles value from RATES Started by bleebo	2 Replies 10769 Views	17/05/21 20:43 by bleebo
How to determine kinetic time step Started by Sidol	1 Replies 10816 Views	14/04/20 17:15 by dlparkhurst
Bimass growth model Started by Hamed	3 Replies 10923 Views	14/01/24 19:22 by dlparkhurst
Oxidation of Fe2+ and Mn2+ and precipitation of Fe(OH)3 and MnO2 Started by silvia	2 Replies 10989 Views	14/03/23 15:27 by silvia
Rates to simulate gas flush at specified time intervals Started by mloche	1 Replies 11031 Views	07/02/23 19:50 by dlparkhurst
KINETICS of Orgc Started by gmgmgm	1 Replies 11072 Views	13/05/24 16:12 by dlparkhurst
Use of CO2 to neutralize pH Started by allancn	1 Replies 11119 Views	27/02/24 15:10 by dlparkhurst
Oxidation of meteor material Started by mvida	1 Replies 11137 Views	26/06/24 01:08 by dlparkhurst
Help with kinetic model for Mg2SiO4 dissolution Started by ms14218	1 Replies 11216 Views	29/06/23 17:06 by dlparkhurst
Kinetic Modeling Error Started by serhatttt	2 Replies 11307 Views	19/04/23 21:17 by serhatttt
Integration Time needed to complete KINETICS coupled to TRANSPORT Started by Ucef	1 Replies 11326 Views	04/11/20 21:53 by dlparkhurst
pH and PCO2 changes with time Started by serhatttt	1 Replies 11351 Views	18/02/24 18:45 by dlparkhurst
CO2-Calcite-Water interaction -CO2 storage in an aquifer Started by MMMM	1 Replies 11352 Views	14/06/24 15:28 by dlparkhurst
kinetic of calcite dissolution Started by P.Merdy	7 Replies 11354 Views	11/11/25 16:02 by P.Merdy
Mackinawite reactive dissolution kinetics Started by peterwadeuk	0 Replies 11397 Views	02/07/17 11:02 by peterwadeuk
Kinetic reaction in function of time Started by FlouretAlex	1 Replies 11408 Views	03/12/20 23:31 by dlparkhurst
KINETIC REACTIONS Started by onat.yakisik	3 Replies 11429 Views	01/02/24 16:56 by dlparkhurst
Kinetic of Calcite Precipitation Started by Hamed	1 Replies 11462 Views	07/06/24 02:54 by dlparkhurst
Rate equations in database and finding relevant equations of the reactions Started by Chatura	2 Replies 11472 Views	07/09/22 23:50 by dlparkhurst
Conditional reaction product in Kinetics Started by florisWQ	1 Replies 11501 Views	17/06/24 21:54 by dlparkhurst
The rate equation with "nucleation" does not work at m0 = 0 Started by MichaelZ20	2 Replies 11504 Views	05/06/23 12:42 by MichaelZ20
Question about Kinetic 1D modeling Started by Jeonghwan Hwang	1 Replies 11587 Views	27/06/24 15:22 by dlparkhurst
Forsterite rates for kinetic modelling Started by maria	1 Replies 11594 Views	09/10/24 16:11 by dlparkhurst
Computing time and convergence in a complex kinetic model Started by mloche	1 Replies 11598 Views	15/12/23 18:09 by dlparkhurst
kinetics problem in phreeqcRM Started by oatteia	1 Replies 11606 Views	02/07/23 17:46 by dlparkhurst
Ureolysis and Calcite kinetics Started by rizon007	0 Replies 11676 Views	16/09/17 18:56 by rizon007
reaction rate constant Started by sama.k	0 Replies 11753 Views	21/03/21 09:47 by sama.k
C isotopes with transport using rates Started by Pete_Scott	0 Replies 11768 Views	16/03/17 17:18 by Pete_Scott
carbonation olivine Started by mishAL	1 Replies 11795 Views	08/10/24 14:19 by dlparkhurst
Simple arithmetic in RATES block? Started by peterwadeuk	2 Replies 11822 Views	13/11/23 09:44 by peterwadeuk
Nucelation RATES M=0 Started by Isil	2 Replies 11890 Views	03/04/24 12:04 by Isil
KINETIC MODELING OF ALBITE DISSOLUTION IN DIFFERENT PH Started by matchmyphreeqc	1 Replies 11965 Views	10/12/24 04:55 by dlparkhurst
Calcite Disolution in open and close system Started by pia said	2 Replies 11993 Views	25/09/19 18:39 by pia said
KINETICS quartz units Started by geo_afonso	1 Replies 12006 Views	21/02/25 18:35 by dlparkhurst
olivine carbonation Started by mishAL	1 Replies 12020 Views	27/03/25 13:56 by dlparkhurst
Solubility of gypsum in RATES block Started by AnotherSLGuy	14 Replies 12021 Views	20/11/25 06:59 by AnotherSLGuy
Question regarding missing RATES info for Ca2SiO4 in PHREEQC Started by miriam.absalyamova	1 Replies 12027 Views	08/07/21 15:13 by dlparkhurst
Kinetics of anhydrite dissolution Started by piet	2 Replies 12088 Views	22/06/22 17:22 by piet
kinectic of galena and cerussite in acid ph Started by Scarlet	2 Replies 12129 Views	24/10/17 18:55 by Scarlet
Negative Values During the Simulation Started by gmgmgm	2 Replies 12131 Views	07/01/25 20:10 by dlparkhurst
Using PEST for Bacteria Growth Parameters Started by mek001	3 Replies 12149 Views	17/03/23 23:03 by dlparkhurst
calcite kinetic rate Started by maria	3 Replies 12210 Views	24/01/24 15:35 by dlparkhurst
Rate Expressions Started by rfembilejr	2 Replies 12229 Views	11/07/17 15:04 by rfembilejr
Retrieving cell saturation in kinetics when using phreeqcRM Started by oatteia	4 Replies 12259 Views	22/01/24 15:18 by dlparkhurst
Data in kinetic reactions Started by AliMahaqi	4 Replies 12272 Views	21/07/23 02:27 by AliMahaqi
modeling the corrosion of steel Started by pslomski	1 Replies 12292 Views	21/02/19 20:08 by dlparkhurst
Output the current amount of reactants during kinetic reactions Started by Yongqiang	2 Replies 12297 Views	17/06/20 14:27 by Yongqiang
kinetic exchange Started by zsszabo86	1 Replies 12323 Views	01/12/17 15:59 by dlparkhurst
Checking exchanger reactions Started by peterwadeuk	2 Replies 12348 Views	03/07/17 11:01 by peterwadeuk
Rate law with "Elapsed time" as a variable Started by Ucef	2 Replies 12373 Views	26/10/20 20:23 by Ucef
Need kinetic data for scheelite(CaWO4) and ferberite (FeWO4) dissolution Started by Sidol	0 Replies 12451 Views	02/06/20 09:49 by Sidol
Reaction of pyrite Started by dat	5 Replies 12458 Views	24/02/23 15:54 by dlparkhurst
stoichiometric coefficient of the KINETICS data block Started by sama.k	3 Replies 12463 Views	11/05/20 14:17 by dlparkhurst
Kinetics - Activity of H+ Started by Rozeran	3 Replies 12485 Views	10/03/24 20:57 by dlparkhurst
Biodegradation of acetate (adding complexity to the model) Started by maria15143	3 Replies 12488 Views	02/02/24 16:04 by dlparkhurst
Cement Hydration Kinetics and Rate Started by MaryamZamzami	3 Replies 12510 Views	23/07/24 18:41 by dlparkhurst
Store calculated rate in the RATE keyword Started by ahmadreza_shojaee	4 Replies 12514 Views	24/04/24 11:11 by ahmadreza_shojaee
Question about dissolution kinetics Started by Sidol	1 Replies 12523 Views	20/03/20 18:34 by dlparkhurst
Simplification of the Oxidation kinetics. Started by mloche	1 Replies 12525 Views	16/02/22 20:50 by dlparkhurst
Kinetic Modeling of Methanogenesis as Ex.15 Started by stfmtu	3 Replies 12534 Views	12/08/24 17:36 by dlparkhurst
Fe_di & Fe_tri -> oxidation and reduction? Started by florisWQ	3 Replies 12607 Views	17/09/24 00:29 by dlparkhurst
Multiple kinetics simulation Started by davide	2 Replies 12618 Views	22/10/20 15:48 by davide
Simple reaction RATES, KINETICS Started by inhee	3 Replies 12646 Views	01/12/23 05:05 by dlparkhurst
Kinetic Reaction for species Started by hamiderfani	1 Replies 12657 Views	03/01/18 18:41 by dlparkhurst
Equilibrium problem in the kinetic modeling Started by Hamed	3 Replies 12712 Views	05/03/24 23:37 by dlparkhurst
Conditional in RATES Started by javiera.aedo	4 Replies 12723 Views	27/08/20 19:00 by javiera.aedo
Transformation from Static Leaching to Dynamic Leaching Via Kinetic Flow Term Started by jLi200H	2 Replies 12786 Views	12/12/18 08:53 by jLi200H
kinetic dissolution of multicomponent glass Started by OLIVIA_RH	1 Replies 12872 Views	19/05/25 14:59 by dlparkhurst
Simulation not using dissolution rates Started by leocwang	3 Replies 12886 Views	06/01/25 16:23 by dlparkhurst
Kinetics of Mineral precipitation combined with Brine water evaporation Started by Jovel	2 Replies 12904 Views	09/01/25 12:44 by Jovel
H2S oxidation Started by hkkv	5 Replies 12913 Views	01/06/23 15:40 by dlparkhurst
Initial concentrations as input to RATES Started by Alberto	1 Replies 12936 Views	22/07/15 14:02 by dlparkhurst
Reservoir Modeling. Started by serhatttt	4 Replies 12952 Views	17/12/22 17:38 by serhatttt
Kinetics and solid solution Started by Flopi	3 Replies 12974 Views	05/06/20 15:47 by dlparkhurst
ADVECTION with KINETICS Started by Laknesh	2 Replies 12976 Views	17/03/17 02:31 by Laknesh
Halite/Gypsum Precipitation Started by sttr6	1 Replies 13009 Views	25/09/15 16:27 by dlparkhurst
Calcite Dissolution Kinetic Help Started by mems	1 Replies 13023 Views	01/08/17 19:35 by dlparkhurst
Manganese oxidation Started by isaoxer	3 Replies 13029 Views	19/08/21 17:31 by dlparkhurst
Surface species specific dissolution of goethite_Kinetics Started by Tao	4 Replies 13139 Views	29/09/24 15:51 by Tao
coefficients of anorthite and illite Started by Hydroman	2 Replies 13139 Views	20/12/18 07:34 by Hydroman
Doubt regarding value of m, m0 and integration methods Started by Arindam Basu	2 Replies 13178 Views	06/09/24 05:42 by Arindam Basu
Reaction stoichiometry for oxidation of Nta (Example 15) Started by MichaelZ20	2 Replies 13183 Views	15/10/18 17:47 by MichaelZ20
long-term behaviour of hydrogen in reservoirs. Started by amaury22	5 Replies 13189 Views	30/06/23 20:54 by dlparkhurst
Error Reproducing "Fractionation of Carbon during Precipitation" Started by GuyC	1 Replies 13189 Views	09/07/15 00:36 by dlparkhurst
Acetogenesis reaction Started by stfmtu	4 Replies 13195 Views	18/12/25 11:31 by Rumple
How to add reaction rate, surface area and mass changes to selected_output Started by OLIVIA_RH	2 Replies 13207 Views	15/05/25 16:08 by OLIVIA_RH
Kinetic for Corrosion Started by snjaykdubey	1 Replies 13225 Views	02/05/15 23:47 by dlparkhurst
CONVERTION OF UNITS in kinetics controlled biodegradation of acetate Started by maria15143	6 Replies 13305 Views	16/01/24 10:02 by maria15143
Amount of residual and reacted minerals Started by dat	3 Replies 13345 Views	12/12/22 15:57 by dlparkhurst
Serpentinization modeling Started by mishAL	3 Replies 13446 Views	23/03/25 13:52 by dlparkhurst
High pCO2 values usage in CO2 capture script Started by Erdinc	3 Replies 13451 Views	06/05/25 02:54 by dlparkhurst
Define ion species in Kinetics keyword Started by ahmadreza_shojaee	5 Replies 13468 Views	10/05/23 17:11 by dlparkhurst
rate of basalt glass dissolution Started by Anvj0705	5 Replies 13470 Views	29/12/22 03:42 by dlparkhurst
Kinetic redox reactions Started by NKampman	1 Replies 13471 Views	04/11/15 02:52 by dlparkhurst
brucite dissolution/precipitation kinetics Started by Cauchy	4 Replies 13527 Views	25/07/19 14:03 by Cauchy
Help Needed: Pyrite Not Dissolving Under Given Conditions in PHREEQC Started by gmgmgm	2 Replies 13569 Views	09/06/25 09:40 by gmgmgm
COPY and USE KINETICS? Started by zsszabo86	3 Replies 13576 Views	07/04/17 18:11 by dlparkhurst
simple question about equation used in example 9 Started by mvida	1 Replies 13581 Views	01/04/25 21:34 by dlparkhurst
Kinetic of methane formation Started by MMMM	4 Replies 13627 Views	08/04/25 14:48 by dlparkhurst
Just now available... Kinec_v3 a new database for mineral kinetics Started by Eric_Oelkers	1 Replies 13638 Views	07/10/25 06:52 by Mouadh
syntax error in rate equation Started by kathryn.johnson@barr.com	1 Replies 13651 Views	11/07/25 03:43 by dlparkhurst
Salts kinetic dissolution Started by larallange	6 Replies 13850 Views	28/07/23 23:40 by larallange
Reaction rate as output for different time steps Started by priyaiitr	3 Replies 13900 Views	12/09/16 17:13 by dlparkhurst
Kinetic modeling of water-CO2-rock at 300 C and 222.67 atm Started by gagasutomo	5 Replies 13909 Views	16/01/19 22:24 by dlparkhurst
Problems defining the parameters for kinetic calcite dissolution Started by ACSchubert	4 Replies 13919 Views	01/11/18 23:30 by dlparkhurst
Issues with Simulating Dolomite Kinetics Started by davidblevy	6 Replies 14017 Views	14/11/22 21:09 by davidblevy
kinetics for PFAs sorption Started by oatteia	6 Replies 14025 Views	25/04/24 21:16 by dlparkhurst
calculation of k_qu Started by Hydroman	2 Replies 14047 Views	01/09/16 08:33 by Hydroman
How to add a new solution to equilibrate during a kinetic process Started by sama.k	5 Replies 14070 Views	03/08/20 01:18 by dlparkhurst
How to get information on reaction kinetics from experimental data Started by Aoxuan_WANG	5 Replies 14116 Views	29/02/24 11:37 by Aoxuan_WANG
help writing a simple reaction model for transport Started by Mark Himenz	5 Replies 14193 Views	07/07/23 15:12 by dlparkhurst
About kinetics on aqueous components Started by Pak	3 Replies 14199 Views	11/07/17 18:24 by Pak
Need help with kinetic transport Started by mdangelm	3 Replies 14234 Views	11/09/18 23:22 by dlparkhurst
Calcite kinetics Started by Ismail Mercimek	1 Replies 14254 Views	17/06/15 14:00 by dlparkhurst
dissolution with solution agitation Started by Cauchy	7 Replies 14285 Views	13/08/19 17:19 by dlparkhurst
Rate expression for pyrite oxidation Started by ACSchubert	2 Replies 14339 Views	19/11/18 20:12 by ACSchubert
modeling CO2 simulation for calcite rich seal Started by Nourah	6 Replies 14446 Views	27/09/24 13:29 by Nourah
CO2 Reaction Rate Started by serhatttt	8 Replies 14488 Views	19/01/24 09:04 by serhatttt
KC Started by snjaykdubey	3 Replies 14493 Views	04/05/15 14:56 by dlparkhurst
Multiple rate blocks conflicting Started by DHodkin	2 Replies 14503 Views	27/10/15 07:50 by DHodkin
Kinetics-Calculate m0 Started by Pia-Caroline	1 Replies 14516 Views	24/06/15 13:51 by dlparkhurst
reaction rate as function of pH Started by Hydroman	4 Replies 14565 Views	07/01/19 20:29 by Hydroman
Calcite Dissolution Reaction Output Started by priyaiitr	3 Replies 14734 Views	05/10/16 19:50 by dlparkhurst
water-rock-gas reaction computing time Started by tongg	9 Replies 14786 Views	13/02/24 22:52 by dlparkhurst
Goethite - Precipitation Rates Started by lourdsa	5 Replies 14863 Views	10/09/19 18:10 by dlparkhurst
Constraining the supply of oxygen during water infiltration through tailings Started by bschroth	1 Replies 14981 Views	15/08/25 22:28 by dlparkhurst
Redox Kinetics of Aqueous Pu+3 oxidation to Pu+4 Started by mcomins	9 Replies 15049 Views	17/05/23 13:17 by mcomins
RATES output unit: mol/kgw? Started by asainz	2 Replies 15199 Views	23/03/15 13:46 by asainz
KINETICS RATE from PALANDRI AND KHARAKA (2004) and others Started by dkonan01	4 Replies 15258 Views	07/08/24 10:34 by dkonan01
Sulfate Reduction Biomass Started by stfmtu	6 Replies 15290 Views	18/12/24 01:26 by dlparkhurst
Phreeqc seems to halve first kinetic step Started by peterwadeuk	2 Replies 15336 Views	20/04/18 18:15 by peterwadeuk
SO2 Kinetics problem Started by justinninja1	0 Replies 15381 Views	09/10/14 13:09 by justinninja1
Kinetics of Fe(2) oxidation and Fe(3) precipitation Started by Benkaito	6 Replies 15455 Views	03/12/19 21:23 by Benkaito
Infinite iteration and something weird happening with TIME in RATES block Started by AnotherSLGuy	7 Replies 15455 Views	22/04/25 11:43 by MichaelZ20
Geothermal Well Modeling Started by serhatttt	7 Replies 15584 Views	27/09/22 19:28 by serhatttt
Kinetics of minerals mixture Started by Agabamud	8 Replies 15655 Views	07/12/22 18:20 by dlparkhurst
Kinetic of Fe(OH)3(a) precipitation and Kinetic of ferrous iron oxidation Started by woonghee89	2 Replies 15858 Views	26/03/18 01:54 by woonghee89
Save function on Kinetics Started by Erdinc	8 Replies 15882 Views	11/09/24 01:45 by Erdinc
The initial mole value of the precipitating substance Started by sama.k	9 Replies 15966 Views	28/08/20 16:49 by dlparkhurst
Kinetically-controlled Cation Exchange Capacity in alkali uptake Started by Haohan	5 Replies 16020 Views	25/07/25 02:40 by dlparkhurst
Peaks in the breakthrough curve with transport and kinetics Started by GautierLaurent	6 Replies 16041 Views	24/05/18 10:14 by GautierLaurent
sequence of reaction Started by tanbbc	0 Replies 16054 Views	01/02/15 08:05 by tanbbc
kinetic rate Started by Selene Eliana Patani	2 Replies 16099 Views	20/03/18 09:28 by Selene Eliana Patani
A concentration jump at the beginning of transport with kinetic dissolution Started by MichaelZ20	2 Replies 16198 Views	21/02/20 14:25 by MichaelZ20
Dissolution and precipitation of minerals Started by hmal	6 Replies 16234 Views	25/12/17 22:36 by hmal
Clay Kinetic Model Started by taa18	12 Replies 16726 Views	13/05/23 20:27 by dlparkhurst
Evaporation steps linked to time Started by Charlie	7 Replies 16785 Views	01/04/20 15:31 by dlparkhurst
Need help in modeling of corrosion of carbon steel bar in concrete by PHREEQC Started by Sidol	5 Replies 16954 Views	11/03/20 09:09 by Sidol
Cement Hydration Kinetics Started by sama.k	5 Replies 17100 Views	04/04/20 23:09 by dlparkhurst
Kinetic reaction of CH2O Started by Max1	7 Replies 17147 Views	30/09/15 17:08 by dlparkhurst
Explaining behavior of Kaolinite dissolution/plotting rates Started by smolen	10 Replies 17222 Views	21/07/22 21:26 by smolen
Oxidation rate of manganese by KMnO4 Started by Nick	4 Replies 17228 Views	25/09/15 00:29 by Nick
Mineral dissolution in carbonated water reaction not proceeding Started by ReaganK	8 Replies 17501 Views	11/06/25 16:13 by dlparkhurst
changing moles of a reactant Started by Cristina Domenech	12 Replies 17578 Views	28/02/23 12:41 by padhi
A question about the kinetics simulation of CO2 transport after CO2 injection Started by amueru	7 Replies 18099 Views	07/12/23 05:30 by dlparkhurst
calcite dissolution in a pipe Started by davide	12 Replies 18281 Views	26/04/20 14:30 by davide
Previous step values Started by Laknesh	2 Replies 18944 Views	24/06/14 09:22 by Laknesh
Simple Electrolysis - Kinetics ? Started by Merlin66	12 Replies 19324 Views	14/10/17 22:58 by dlparkhurst
Kinetics for ferrihydrite Fe(OH)3(a) in mining canal Started by M.Gundlach	13 Replies 19825 Views	28/11/19 16:28 by pia said
Kinetics and Rates with Transport Modelling of Tailings columns Started by rfembilejr	7 Replies 19884 Views	11/05/17 16:46 by rfembilejr
Time dependent dissolution of CO2 gas phase Started by smc	12 Replies 20207 Views	27/11/23 04:36 by dlparkhurst
Kinetic Dissolution of Calcite Started by Renmori	5 Replies 20474 Views	27/09/18 15:40 by dlparkhurst
Input to RATES block Started by nickvz	2 Replies 20888 Views	09/10/14 20:33 by nickvz
Precipitation before kinetics Started by luicho	4 Replies 21087 Views	13/08/14 19:43 by luicho
Sulfate solution + H2S reaction Started by Alberto	9 Replies 21364 Views	26/05/21 21:29 by dlparkhurst
Galena Kinetics Started by Scarlet	28 Replies 23963 Views	11/10/17 23:56 by Scarlet
exponent for the term (A/V) in the reaction kinetics Started by Tom	2 Replies 25297 Views	24/04/14 07:14 by nickvz
equilibrium or kinetics Started by bessie000	9 Replies 27147 Views	18/03/16 12:56 by Martin K
Calcite Dissolution Kinetics in PHREEQC Manual Started by bschroth	24 Replies 31558 Views	09/03/20 14:12 by dlparkhurst

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