In this study, a commercially activated carbon
was loaded with 10 and 25 wt% hydrous ZrO2 followed by heat treatment at 393K
in an attempt to improve its adsorption capacity towards the removal of free
chlorine from water.
The tested carbons were characterized by SEM,
N2-adsorption –desorption, iodine number, FTIR and pHPZC techniques. The
effects of adsorbent dose, contact time, initial free chlorine concentration
and pH on the removal performance of free chlorine from water were studied.
Loading the original carbon with 10 and 25 wt% hydrous ZrO2 led to reduce its
SBET area as well as its iodine number.
The same trend was also found for the measured
values of pHPZC. The removal performance of free chlorine was found to increase
with decrease the initial solution pH. The equilibrium data fit well the
Langmuir isotherm. Loading with hydrous ZrO2 increased to a great extent the
removal of free chlorine from water.
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