Fluoro-hydroxyapatite/chitosan composites as an eco-friendly adsorbent for direct red 23 dye removal: Optimization through response surface methodology
Journal of Molecular Structure,
Год журнала:
2024,
Номер
1321, С. 140212 - 140212
Опубликована: Сен. 27, 2024
Язык: Английский
Development of a novel low-cost adsorbent Chitosan@EDTA@Cellulose composite to effectively remove Methyl Orange dye from wastewater: Experimental and theoretical investigation
International Journal of Biological Macromolecules,
Год журнала:
2025,
Номер
unknown, С. 141030 - 141030
Опубликована: Фев. 1, 2025
Язык: Английский
Synthesis of TiO₂/Hydroxyapatite Composite Based on Chicken Egg Shells for Methylene Blue Photodegradation
Jurnal Kimia Sains dan Aplikasi,
Год журнала:
2025,
Номер
28(1), С. 31 - 38
Опубликована: Янв. 8, 2025
Hydroxyapatite
(HAp)
was
synthesized
using
low-cost
eggshell
waste
and
employed
as
a
composite
support
material
for
TiO2
photocatalyst.
The
TiO2/HAp
characterized
X-ray
diffraction
(XRD),
Fourier-transform
infrared
(FTIR)
spectroscopy,
surface
area
analyzer
(SAA).
XRD
analysis
confirmed
the
presence
of
TiO2/HAp,
revealing
crystallite
size
9.42
nm.
FTIR
spectra
further
verified
characteristic
peaks
corresponding
to
those
HAp.
BET-BJH
indicated
that
followed
trend
>
HAp
trend,
while
pore
volume
diameter
TiO2/HAp.
photocatalytic
activity
in
methylene
blue
degradation
evaluated
UV-Vis
spectrophotometer,
demonstrating
excellent
performance.
achieved
99.10%
photodegradation
20
ppm
within
120
minutes,
with
an
adsorption
capacity
8.3078
mg/g.
efficiency
40
86.47%,
13.6335
These
results
confirm
effectively
inhibits
electron
recombination
process
TiO2,
thereby
enhancing
its
This
study
highlights
potential
developing
cost-effective
high-efficiency
TiO2-based
photocatalysts,
offering
sustainable
environmentally
friendly
approach
water
purification.
Язык: Английский
A modified approach towards facile and green conversion of cement kiln dust wastes to efficient hydroxyapatite-carbon nanocomposite water adsorbents
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Фев. 21, 2025
A
new
modified
approach
was
used
to
synthesize
hydroxyapatite-carbon
nanocomposite
(HAP-C)
by
utilizing
cement
kiln
dust
(CKD),
which
is
an
industrial
waste
product,
as
a
source
of
calcium.
Calcium
from
CKD
first
chelated
using
citric
acid,
and
the
chelate
transformed
into
calcium
carbonate
carbon
calcination
at
450
°C
for
1
h,
then
reacted
with
ortho-phosphoric
acid
precipitation
method,
thus
serving
precursor
formation
HAP-C.
Then,
HAP-C
calcined
various
temperatures
2
h
after
it
reached
desired
temperature
heating
rate
10
°C/min.
By
characterizing
adsorbent,
composite
mesoporous,
negatively
charged
surface
operating
pH,
average
diameter
length
±
3.6
nm
8
2.9
nm,
respectively.
Quantile
regression
analysis
showed
that
removal
varies
directly
time
dose,
inversely
initial
concentration.
Removal
efficiency
about
95%
80%
ppm
concentration,
min
contact
time,
dose
3.8
g/L,
pH
7
RB
4
LV,
Adsorption
isotherms
followed
Sips
model
inferred
linear
non-linear
analysis.
Adopting
this
novel
in
synthesizing
single
raw
material
reduces
environmental
impact
incurred
costs
associated
conventional
synthesis
route,
while
following
principles
circular
economy
converting
wastes
value-added
products.
Язык: Английский
Synthesis and Characterization of Hydroxyapatite Composite of Cuttlefish Bone (Sepia sp.) With Gelatin as Rhodamine b Dye Adsorbent
ChemistrySelect,
Год журнала:
2024,
Номер
9(40)
Опубликована: Окт. 1, 2024
Abstract
In
this
study,
hydroxyapatite‐gelatin
(HAp‐Gel)
composite
using
Ca
precursor
from
cuttlefish
bone
(
Sepia
Sp.)
has
great
potential
to
be
used
in
hydroxyapatite
synthesis.
The
HAp‐Gel
was
synthesized
in‐situ
by
sol‐gel
method
with
varying
concentrations
see
its
ability
adsorb
rhodamine
b
dye.
XRF
analysis
results
obtained
a
CaO
content
of
95.561
%.
40
%
showed
the
best
adsorption
capacity,
percentage
27.326
%,
which
experienced
an
increase
namely
4.6881
FTIR
characteristic
peaks
functional
groups
contained
and
gelatin.
XRD
diffraction
pattern
HAp
ICSD
standard
spectrum
(#157481),
average
size
crystal
9.72
nm.
comparison,
5.25
SEM‐EDS
that
morphology
agglomerated
irregular
shapes
Ca/P
ratio
1.56.
SAA
surface
area
55.256
m
2
/g.
sorption
application
followed
Freudlich
isotherm
model
multilayer
on
heterogeneous
adsorbent
surface.
interaction
between
B
occurs
at
pseudo‐second‐order
can
reused
up
two
cycles
when
interacting
B.
Язык: Английский