Water
pollution is a major
environmental
problem especially that
produced from
different industries,
which produce large amounts of
toxic
heavy metals to the soil and
wastewater;
these heavy metals
affect human health. This study was made to study
the
removal of one of these toxic heavy metals
which is Cr(VI) by ad
sorption technique
using
silica gel compound
3
-
Glycidoxypropyl
-
functionalized
silica
.
The adsorption exp
eriments were applied for a
range of pH
(2
-
13)
,
temperature, adsorbent dosage,
initial co
ncentration, and contact time.
The results
revealed
that
the percentage removal of Cr(VI)
decreased with the increase of Cr(VI) concent
ration, pH
and temperature, while the percentage
removal increase with increase contact time and adsorbent dose.
The removal efficiency for Cr(VI)
adsorption was more than 75% af
ter 24
hour this
achieved at pH
around 6, and temperature 25ºC, using 0.04g weight of dose, at initial concentration 10
ppm for 10
mL
Cr(VI) solution.
The adsorption of Cr(VI)
onto MSiTh was optimized under acidic conditions (pH<
7) at room
temperature
.
Ac
cording to pseudo second order the Cr(VI) sorption, the results achieved shows the
MSiTh is able to remove Cr(VI)within
20 min with high removal efficiency.