Hi Murugan,
The solutions depends on how the data has been stored in the DAC file. If you
set Observation Points before the simulation starts, then FEFLOW will create
Mass Species for all the major ions defined in the PHREEQC files. Then you will
get the typical charts, where each concentration breakthrough is exportable via
right-click on the chart.
If you decide to only save the results using PHREEQC output keys defined in the
text files, FEFLOW will create nodal distributions with those values. You have
all the information per each FEFLOW node and time step. The only workaround to
create time-series is via Python, where you write your own scrip to go through
the steps in DAC file, get the nodal values and export them.
Cheers
Carlos