The modified carbon felt was tightly packed (0.5 cm in thickness) into a 1-cm-diameter, 10-cm-high glass column for chromatography. The column was filled with the studied solution at the top of the column and the solution flowing through the membrane was analyzed at the exit (Fig. 24). The solution wascirculatedbypumpingwithaper istaltic pumpandmaintained at 20 °C. Thanks to the high porosity of the felt, no strong limitation of the liquid flow occurred in the column during the filtration process.
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