δ ¼ 0.329 mm/s, ΔQ ¼ 0.88 mm/s assigned to nanoparticles of magnetite (Fe 3 O 4 )
[25–27]. The doublet associated to Fe 3 O 4 has a FWHM ¼ 0.71 mm/s suggesting that
there is a size distribution of magnetite nanoparticles in Fe-PILC and probably this
oxide is forming the pillars [20]. The presence of lepidocrocite (γ-FeOOH) in
Fe-PILC is not a surprise since there are reports indicating that lepidocrocite is an
intermediate product in the magnetite synthesis [28–30]. Table 1 shows the
2 4 6
8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
)
u
.
a
(
y
t
i
s
n
e
t
n
I
e
v
i
t
a
l
e
R
2θ Scale (degrees)
Fig 1 X-ray diffractogram of Fe-PILC
Fig 2 Mössbauer spectrum of bentonite
Photo-Fenton Treatment of a Pharmaceutical Industrial Effluent Under Safe pH. . .
245
[25–27]. The doublet associated to Fe 3 O 4 has a FWHM ¼ 0.71 mm/s suggesting that
there is a size distribution of magnetite nanoparticles in Fe-PILC and probably this
oxide is forming the pillars [20]. The presence of lepidocrocite (γ-FeOOH) in
Fe-PILC is not a surprise since there are reports indicating that lepidocrocite is an
intermediate product in the magnetite synthesis [28–30]. Table 1 shows the
2 4 6
8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
)
u
.
a
(
y
t
i
s
n
e
t
n
I
e
v
i
t
a
l
e
R
2θ Scale (degrees)
Fig 1 X-ray diffractogram of Fe-PILC
Fig 2 Mössbauer spectrum of bentonite
Photo-Fenton Treatment of a Pharmaceutical Industrial Effluent Under Safe pH. . .
245