mirror of
https://git.gfz-potsdam.de/naaice/iphreeqc.git
synced 2025-12-15 16:18:22 +01:00
822b39351d
git-svn-id: svn://136.177.114.72/svn_GW/IPhreeqc/branches/zedgraph@7206 1feff8c3-07ed-0310-ac33-dd36852eb9cd
51 lines
1.7 KiB
Plaintext
51 lines
1.7 KiB
Plaintext
TITLE Example 19.--Linear, Freundlich and Langmuir isotherms for
|
|
Cd sorption on loamy sand. Calculates Example 7.1
|
|
from Appelo and Postma, 2005. Data from Christensen, 1984.
|
|
SURFACE_MASTER_SPECIES
|
|
Linear Linear
|
|
Freundlich Freundlich
|
|
Langmuir Langmuir
|
|
SURFACE_SPECIES
|
|
Linear = Linear
|
|
Linear + Cd+2 = LinearCd+2
|
|
-log_k -100.7 # log10(0.2) - 100
|
|
-mole_balance LinearCdCl2
|
|
Freundlich = Freundlich
|
|
Freundlich + 0.722 Cd+2 = FreundlichCd+2
|
|
-log_k -102.61 # log10(0.421) + (0.722 - 1) * log10(112.4e6) - 100
|
|
-no_check
|
|
-mole_balance FreundlichCdCl2
|
|
Langmuir = Langmuir
|
|
Langmuir + Cd+2 = LangmuirCd+2
|
|
-log_k 6.56 # log10(112.4 / 30.9e-6)
|
|
-mole_balance LangmuirCdCl2
|
|
SURFACE 1
|
|
Linear 1e100 1 1
|
|
Freundlich 1e100 1 1
|
|
Langmuir 8.45e-8 1 1 # 9.5 / 112.4e6
|
|
-no_edl
|
|
SOLUTION 1
|
|
pH 6
|
|
Ca 1
|
|
Cl 2
|
|
REACTION 1
|
|
CdCl2 1
|
|
0.7e-6 in 20
|
|
USER_GRAPH Example 19
|
|
-headings Linear Freundlich Langmuir
|
|
-chart_title "Sorption Isotherms"
|
|
-axis_titles "Dissolved Cd, in micrograms per kilogram water" \
|
|
"Sorbed Cd, in micrograms per gram soil"
|
|
-plot_tsv_file ex19_meas.tsv
|
|
-axis_scale x_axis 0 40
|
|
-axis_scale y_axis 0 6
|
|
-initial_solutions true
|
|
-start
|
|
10 x = act("Cd+2") * 112.4e6
|
|
20 PLOT_XY x, mol("LinearCd+2")*112e6, color = Green, symbol = None, line_width = 2
|
|
30 PLOT_XY x, mol("FreundlichCd+2")*112e6, color = Blue, symbol = None, line_width = 2
|
|
40 PLOT_XY x, mol("LangmuirCd+2")*112e6, color = Orange, symbol = None, line_width = 2
|
|
-end
|
|
PRINT
|
|
-reset false
|
|
END |