Dataset of surface reactions for gwb programs Dataset format: sep22 Surface type: Kd-1 Model type: Kd Surface potential: n/a Surface capacitance: n/a Thermo dataset: thermo+Benzene.tdat * * Example dataset for setting sorption described by distribution * coefficients (Kd's). * * Follow this format to set Kd sorption in a GWB run. -end- 1 surface species >Benzene(aq) charge= 0 mole wt.= 78.1134 g 1 species in reaction 1.000 Benzene(aq) Kd= .00016 -end- * * IMPORTANT NOTES: * * There are no basis species in a Kd model because there is no mass * balance on sorbing sites. * * The surface species are formed by sorption of ions. Enter Kd's as * linear, not logarithmic values (they are converted to log values * internally in the program). * * The Kd values are presented here in units of mol/g solid. A Kd value * represents the ratio of an ion's sorbed concentration in mol/g solid * to its free activity (not molality) in solution. In taking data from * the literature, be careful to note the units used and make the * appropriate conversion, accounting as necessary for the ion's activity * coefficient and perhaps the extent of complexation in solution.