I am writing to check how are the CEC determinations supposed to be done for PHREEQC modelling. Could you please send me the recipe? I believe they should be determined in whole sediment and not just in the fine fraction.
I have all my CEC values determined for fine fraction. When I tried to model cation exchange using these values they seemed to be too high. Then I tried to recalculate these CEC values considering the amount of fine material in the sediment and I got CEC values about one order of magnitude less and that simulated better the results. However, I am not sure it is correct to do this approximation.
Could you please clarify for me this question?
Thanking in advance for your kind help.
M. Teresa Condesso de Melo
Universidade de Aveiro
Departamento de Geociências
Campus Universitário de Santiago
Phone: +351-234-37.02.00 ext. 23213
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