webmaster Posted December 26, 2004 Share Posted December 26, 2004 From: Katie Aguilar Subject: HFO Sorbing Surfaces I am modeling leachate through a clay layer. The contaminants of concern are metals, there are no organics in this problem. I am trying to model the natural attenuation in clay as the leachate runs through a set volume of clay (8 cubic feet) with a CEC = 0.6 eq/g. The model works well when I use the ion exchange script for the model. However, when I add in the FeOH script, it tells me that the reactants are charge imbalanced by -539.8, and it does not continue the model. I am running GWB (React) Release 4.0.2 on Windows 2000, and have attached the script. I am also using the default thermo dataset. # React script, saved Tue Jan 06 2004 by kaguilar data = "C:Program FilesGwbGtdatathermo.dat" verify surface_data = "C:Program FilesGwbGtdataIonEx.dat" surface_data = "C:Program FilesGwbGtdataFeOH.dat" exchange_capacity IonEx = .6 eq/g time start = 0 days, end = 20 years temperature = 25 decouple Fe+++ swap Kaolinite for Al+++ swap Quartz for SiO2(aq) swap Goethite for Fe+++ 66.4 kg free H2O free kg Kaolinite = 173.3 free kg Quartz = 218.6 total mg/kg Mg++ = 94.59 total mg/kg H+ = -.1047 total mg/kg SeO3-- = .3186 total mg/kg Cr+++ = 1.074 total mg/kg Pb++ = .01556 total mg/kg Hg++ = .0004979 total mg/kg Ag+ = .4979 total mg/kg As(OH)4- = .9769 total mg/kg Ba++ = .0001944 total mg/kg O2(aq) = 132.9 total mg/kg Cl- = 28.88 balance on Na+ total mg/kg Na+ = 988.1 total mg/kg K+ = 291.7 total mg/kg SO4-- = 2755 free kg Goethite = 8.3 density = 1.013 react 9.42 kg of H2O react 4.69 mg of Ag+ react 9.2 mg of As(OH)4- react .0018 mg of Ba++ react 272 mg of Cl- react 11.1 mg of Cr+++ react -.986 mg of H+ react .0047 mg of Hg++ react 2747.8 mg of K+ react 891 mg of Mg++ react 9307.9 mg of Na+ react 1251.9 mg of O2(aq) react .15 mg of Pb++ react 25.95 kg of SO4-- react 3 mg of SeO3-- flush itmax0 = 1000 itmax = 1000 Quote Link to comment Share on other sites More sharing options...
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