PHREEQC basics

SIM_NO and doubling the graph

Started by MichaelZ20

Simulation of H₂-rock interaction feedback on PHREEQC code

Started by Valentina_Henao

Inverse modeling for exchangeable cations

Started by MichaelZ20

Handling charge balance when pH is measured (Fe(II) speciation case)

Started by ss13217

Controlling Redox Conditions During SOLUTION_MODIFY

Started by Jeonghwan Hwang

Looking for help understanding how phreeqc treats equilibrium phases.

Started by tjgeeza

iphreeqc - User_Punch at all timesteps

Started by seajay812

How to prevent Cl(7) from reducing to Cl(-1)

Started by hj990425

Using OH- as a master specie

Started by Kevin Brown

Pressure dependence of PhreeQC

Started by daizhaoyi

Problem with pH range vs USER PUNCH

Started by lrossi

Problem of infinite loop by USER_PUNCH

Started by hj990425

NH3 solubility

Started by MichaelZ20

The operation result of copying Instance 9 is incorrect

Started by yisongxu

Validating PHREEQC activity coefficent

Started by salimmalik

COM module fails but PHREEQCi works

Started by TerryH

How to adjust S(6) concentration in PHREEQC to match a fixed pH from pH meter?

Started by ss13217

Modelling the activity coefficient- Database for nitrite NO2-

Started by salimmalik

Differences in results between Windows/Linux version and Mac version

Started by mmelwani

PHREEQC Mixing Model ? Can RPM and Time Be Included?

Started by adhindafa

Connecting element-based flow and transport solver to PHREEQC

Started by anovikov

Setting solution pH with NaOH concentration

Started by OLIVIA_RH

Eu carbonate pH distribution

Started by hj990425

Defining rates for mineral precipitation

Started by WJJ

Ionic Strength of brine water

Started by Jovel

A problem with EQUI

Started by AnotherSLGuy

reducing/oxidation conditions

Started by hj990425

As phase plot example

Started by jt2020

Implementation of a figure

Started by Chemistry

Question about the charge KEYWORD

Started by hj990425

Compiing issue when running the IPheeqc advection example in cpp

Started by conghaoyi

How do I change the pH of a solution with hydrochloric acid

Started by Smolly

Batch reaction with kinetic dissolution and equilibrium precipitation

Started by Max

Help with setting up Fe hydroxiphosphate precipitation reaction

Started by frederico_aragao

Help on understanding how RATES and some other blocks are written

Started by frederico_aragao

conversion from molarity to molality

Started by ss13217

PhreeqcRM: using CreateMapping() to inactive cells from reaction calculation

Started by weilas

Problem regarding missing species of CaF after simulation

Started by i_azharkhan

Errors in a modified database

Started by RenAmb

Need help with estimating pH in different soil layers through time

Started by Azad

On the right usage of KNOBS

Started by Flopi

FREE ION ACTIVITY AS INPUT

Started by ioapa

Titrating with H2SO4 - figuring amount added

Started by JVillinski

Solubility of CO2 in a system with fixed total pressure

Started by jalil

Binary Interaction Parameter for Gas Mixtures

Started by Salem

Understanding Pitzer Model

Started by Salem

Issue with Multiple PhreeqcRM Instances and RM_SetConcentrations in Fortran

Started by pirouzs

Kinetic CO2 degassing

Started by MichaelZ20

Iteration

Started by Researcher

pH calculation

Started by aud

number of mixruns with variable cell length

Started by Feldmann

Niobium specitation plot

Started by kimdy

non-carbonate/total carbonate error

Started by JVillinski

Density calculation in the Description of solution section of the output

Started by Researcher

KIN_DELTA sign

Started by MichaelZ20

Questions about Vm Under SOLUTION_SPECIES

Started by TRJ

Output product solubility constants

Started by ammonge

Disconnecting simulations for USER_GRAPH

Started by MichaelZ20

How to perform sequential equilibrations with Solution Spread

Started by peterwadeuk

How to extract data from the Output file

Started by ss13217

On Lead solubility in water

Started by ecsgsi

Kinetic Calcite Precipitation

Started by TMPlanter

Extremely high saturation indices of hematite in groundwater

Started by Zhe Dong

Litharge solubility

Started by ecsgsi

I need hlep

Started by asael mor

add diffusion coefficients

Started by Mr.white

Discrepancy in Na and Cl Molality Calculation Across All Databases in PHREEQC

Started by CHENTing

Solution_spread and reactions

Started by GeeqC

CO2(g) - input file (PhreePlot)

Started by blaziuu

Asking about PHREEQC for Struvite Modelling

Started by adhindafa

pH estimation without Alkalinity measurement

Started by lisaR

pH effective value

Started by lisaR

Fix Redox State Problem

Started by Chemistry

Interaction of CO2-H2S with Carbonate Minerals

Started by amerhyme

AI, Google Search, and Internet Changes

Started by loonst

Uranium-borate complex

Started by magan.govender

EQUILIBRIUM_PHASES with atmospheric pressure

Started by Jowitawl

Simple questions on BASIC statement/function for data extraction

Started by charis.sy.wong

Transport shifts and reaction/kinetics steps

Started by MichaelZ20

Question about KIN_DELTA("Species") calculation

Started by Subat

Input erros

Started by gmgmgm

Will excessive reaction steps cause the model to crash？

Started by Rhine

CO2SYS comparison

Started by steve.rackley

Ionic strength limits

Started by Charlie

RATES doesn't work

Started by gmgmgm

How to fix charge balance error for acid solution and buffer

Started by ss13217

Kinetics, Rates and Advection: K-Feldar Dissolves and Albite Precipitates

Started by MACAHarding

Modeling dissolution without rock/fluid equilibrium

Started by TMPlanter

Evaporation Simulation Question

Started by davidblevy

pH of mixed solution

Started by Merson

Error with SiO2 when adding new minerals to a Pitzer model.

Started by TMPlanter

Difference between KIN_DELTA and SAVE moles

Started by ciegolon

how to convert from mg/l to molality ?

Started by AlemanDavid

Guide on running a simple example and seeing the results with PHREEQCRM

Started by 1byte

Convergence issues calculating speciation

Started by caitlin.selfe

How to compute the hydrogen solubility in pure water with different temperature

Started by yshiduo

How to compute the concentration with REACTION pressure and temperature

Started by yshiduo

Aqueous speciation as function of pH

Started by geochemBeBe

calculating SI for dissolution of calcite at different PCO2 values

Started by crom

Is it possible to calculate temperature change with PHREEQC?

Started by MichaelZ20

definition for expression “controlling phases”

Started by c.wolke

differences between phreeqc and manually calculated charge balance

Started by JoniDH

Data interaction between PHREEQC and toughreact

Started by Merson

Simulate the carbonation of Mg(OH)2 with NaHCO3

Started by lrossi

H4SiO4 is not in the database, how to add it to show secondary major minerals

Started by duanjiabin

Pyrite dissolution /Fe+3 oxidation

Started by gmgmgm

Pyrite oxidation/ Fe+3

Started by gmgmgm

Neutralization of a multimetallic solution using NaOH

Started by Kompa

NEW DATABASE

Started by Bernice

CO2 Stripping

Started by pnair

Adding VFAs/acetic acid into phreeqc

Started by akaess

CINETIQUE DE LA DISSOLUTION DU QUARTZ

Started by LAMINE

EFFECT OF NaCl, KCl and CaCl2 in solubility of Calcite

Started by onat.yakisik

Thermodynamic data

Started by onat.yakisik

Density calculation and mole concentration of components

Started by Hashemi

USER_Graph with pH-Value and SI

Started by eismann

Ionic strength reported and manually calculated are not consistent

Started by klk

Inconsistent amounts of elements when input is in mg/L

Started by klk

Calcium hydroxyphosphate(Ca5(PO4)3OH)

Started by melaniewalker

Calculatinh pH value from Major ion concnetrations

Started by kbrohith

pH increases after the concentration of a solution

Started by dmcv

adding alo2- as solution species is not working

Started by maria

How to define mol amount for basalts for CO2-rock-brine interactions

Started by maria

Apply reaction to array of solutions

Started by GeeqC

Speciation calculations for chemicals and defining DOC in PHREEQC.

Started by hobbit1998

Incremental mixing

Started by tcotterell

USER_GRAPH

Started by MichaelZ20

How to see the effect of an increased pH on a composition of water

Started by akaess

Defining the amount of moles in "EQUILIBRIUM_PHASES"

Started by seanshi40@gmail.com

Solubility of Fe(OH)3(a) in presence of Goethite

Started by arif

help with initial condition for H2 reduction

Started by amaury22

MINERAL CHANGE WITH RESPECT TO TIME

Started by kennedyantwi1

Hydrogen peroxide solution

Started by Tom

How to model the Effect of CO2-brine-rock mineral interactions on porosity

Started by kennedyantwi1

Simulating change in SI as a function of pH over time

Started by DyliS

CO2 Capture by Steel Slag Heap

Started by Erdinc

Calcite Solubility vs T (I get wrong results)

Started by Salem

Methylmercury speciation

Started by Chrysius

Lab-Titration versus PHREEQC-Alkalinity (at high CO2 concentrations)

Started by Felix

Adding a new graph to the graph of multiple mixes

Started by MichaelZ20

Reaction Enthalpy for Calcite in phreeqc.dat

Started by Salem

One major restriction on the rewriting capabilities for aqueous species

Started by RayTherminator

Aeration/Iron-Oxidation as a Kinetic Process

Started by hobbit1998

Calculating meq/l from meq/kg CEC (fractured rock)

Started by Felix

Surface complexation and error with loading database file

Started by hobbit1998

Adding a chemical to a groundwater and tracking pH change

Started by hobbit1998

Binary interaction coefficients for multicomponent gas phase

Started by ekeskin

first steps

Started by INZILLO

Interpretting Output file

Started by Agabamud

Gas phase mol increase

Started by dat

PHREEQC in R ( phreeqc Package )

Started by azzeddine

same CO2 solubility with different brine concentrations?

Started by maria

Different saturation indices at different conditions

Started by maria

Saturation Index in output file not log(IAP/Ksp) ?

Started by GTG

Specify "charge" in a multi-solution input file?

Started by toupis12

Geothermal solution modelling

Started by maria

GPU usage for IPhreeqc

Started by Wonwoo Yoon

Running PHREEQC on Matlab Using Mac

Started by Nic

Gas solubilities in liquid solutions

Started by micho_95

Davies equation in PHREEQC

Started by Wonwoo Yoon

Add gas to solution to get gas solubility at high pressures

Started by ekeskin

SURFACE block units

Started by Nic

Negative values of the total concentration of primary components as inputs

Started by Sara Tabrizi

Starting with PHREEQC

Started by Salem

Resources for setting up input file for marine CO2 modeling?

Started by mcringham

Activity Coefficient Models

Started by Salem

USER_GRAPH

Started by ani.dol

Bicarbonate input

Started by rapheul

Database Error

Started by victoriaade

problems of Species Plot

Started by Xavier.Qiu

USER_GRAPH Questions

Started by davidblevy

convert meq/kgw to meq/L in alkalinity and convergence error

Started by Chatura

Calculate resulting pH by mixing 2 solutions

Started by temo

Distribution of Species Molality Question

Started by zackh

How to add brine solution in PHREEQC

Started by maria

Definition of saturation index SI/ documentation of version 3

Started by d_guse

Single Stage Mine Water Treatment with Aeration

Started by Onur

Add hydrogen peroxide

Started by matzanaroc

Calculation of precipitated solid volume / Alkaline Reagent Consumption

Started by Onur

Pitzer act. coefficients for carbonate w/ dissociation constants by Millero 2006

Started by Piet_

Basic question about Selected_Output

Started by pdomski

Failing to converge SOLUTION keyword with water identifier

Started by smidera

Solubility of hydroxides in water as a function of pH

Started by ChemInd74

Simulation of Aeration in PHREEQC and Using Reactants

Started by Onur

save mix_equilibrium_phases as a new equilibrium phases

Started by Antonio

Mineral dissolution/precipitation for CO2 injection

Started by 261239

EXCHANGE module and relation to sorption isotherms

Started by larsaste

Should the known pKa for an acid be set in PHASES or in SOLUTION_SPECIES?

Started by MichaelZ20

Specific Conductance calculation

Started by Isil

calculate CO2 solubility in brine composition

Started by maria

PCO2 Equilibrium from Contact with Ca

Started by teimah

A problem with ADVECTION modeling

Started by MichaelZ20

K-struvite precipitation

Started by Cami

What's the exact meaning or the formal name of "SiO2(a)"

Started by Smith.Z