Water Practice & Technology,
Journal Year:
2023,
Volume and Issue:
18(12), P. 3255 - 3270
Published: Nov. 17, 2023
Abstract
The
present
study
investigated
the
use
of
oak
charcoal-based
activated
carbon
(OC-AC)
as
an
adsorbent
for
removal
methylene
blue
(MB)
dye
from
aqueous
solutions.
examined
effects
key
operational
variables,
including
pH,
equilibrium
time,
dosage,
and
initial
concentration.
results
showed
that
pH
had
no
significant
effect
on
MB
adsorption
concentration
below
50
mg
L−1
dosage
1
g
L−1,
but
increasing
contact
time
improved
efficiency.
For
instance,
at
percentage
increased
76
to
99.9%,
with
0.5
3
L−1.
In
addition,
5
300
min,
45.43
87.42%.
also
analyzed
kinetics
isotherm
behavior
found
Avrami
fractional
order
kinetic
model
Freundlich
provided
best
fit
experimental
data.
real
water
samples
OC-AC
could
be
used
efficient
environmentally
friendly
removing
contaminated
effluents
ranging
83
97%.
Journal of Saudi Chemical Society,
Journal Year:
2023,
Volume and Issue:
27(6), P. 101748 - 101748
Published: Oct. 13, 2023
Magnetic
copper
ferrite
nanoparticles,
CuFe2O4-NPs
(CFN)
were
synthesized
via
a
facile
sol-gel
method
for
the
effective
removal
of
4-nitrophenol
(4-NP)
and
indigo
carmine
dye
(IC)
as
typical
hazardous
organic
pollutants
from
wastewater.
The
texture,
morphology,
composition
CuFe2O4
NPs
thoroughly
explored
by
various
physicochemical
techniques.
Various
factors
affecting
adsorption
including
effect
adsorbent
mass,
contact
time,
pH,
initial
IC
concentration,
temperatures
investigated
to
determine
optimum
conditions
removal.
impact
diverse
species
other
coexisting
dyes
on
capacity
CFN
was
investigated.
Five
isotherms
using
two-parameters
(Tekman,
Langmuir,
Freundlich)
three-parameters
(Sips,
Redlich-Peterson)
models.
exhibited
maximum
57.4
mg/g
according
Sips
model,
with
optimal
observed
at
pH
3,
time
90
minutes,
an
mass
0.1
g.
Thermodynamic
data
revealed
both
endothermic
nature
random
arrangement
molecules
onto
adsorbent.
elimination
mechanism
elucidated.
Furthermore,
CFN-catalyzed
reduction
NaBH4
followed
first-order
kinetics
high
rate
0.4365
min-1,
reflecting
catalytic
CFN.
magnetic
features,
cost-effectiveness,
recyclability,
activities
towards
4-NP
removals
made
promising
catalyst
wastewater
remediation.
Industrial & Engineering Chemistry Research,
Journal Year:
2023,
Volume and Issue:
62(37), P. 14835 - 14852
Published: Sept. 11, 2023
Nowadays,
environmental
pollution
is
a
major
concern
due
to
toxic
gases
released
by
an
increased
number
of
vehicles,
industries,
and
manufacturing
plants
worldwide.
These
are
the
leading
cause
severe
health
issues
safety.
There
immediate
need
develop
cost-effective
efficient
gas
sensors
monitor
presence
in
our
environment,
so
that
preventive
steps
can
be
taken
promptly
save
human
lives.
Researchers
have
rigorously
worked
on
this
for
last
three
decades
produced
diverse
range
detect
even
trace
amounts
gases.
The
selection
appropriate
material
critical
design
sensor
with
excellent
sensing
properties.
Different
materials
like
2D
nanomaterials
(graphene
oxide,
transition
metals
dichalcogenides
(TMDCs),
metal
oxide
semiconductors
(MOX),
organics,
etc.)
been
widely
investigated
researchers
highly
sensitive
selective
sensors.
This
review
focused
use
various
hybrid
nanocomposite
development
potential
devices
their
applications.
types
mechanisms
effects
parameters
responses
along
future
promises
discussed
detail.
SPE Journal,
Journal Year:
2024,
Volume and Issue:
29(09), P. 4596 - 4607
Published: June 19, 2024
Summary
Oilwell
cement
ensures
wellbore
stability
and
isolates
zones
while
bearing
casing
load
formation
pressure.
Its
properties,
crucial
in
extreme
downhole
conditions,
include
compressive
strength,
fluid
loss
resistance,
durability.
In
the
present
work,
bismuth
ferrite
nanoparticles
(BFO
NPs)
were
synthesized
using
sol-gel
method
used
as
an
additive
oilwell
cement.
The
BFO
NPs
characterized
Fourier
transform
infrared
(FTIR),
X-ray
diffraction
(XRD),
field-emission
scanning
electron
microscope
(FESEM),
dynamic
light
scattering
(DLS)
techniques
to
analyze
functional
groups,
crystalline
structure,
morphological
features,
hydrodynamic
size
distribution.
Tests
at
70°C
2,000
psi
revealed
that
1%
by
weight
of
(BWOC)
increased
strength
~136%
reduced
~64%
compared
with
base
It
can
be
conjectured
exposed
facets
containing
oxygen
act
nucleating
sites
promote
ordering
silicate
tetrahedra,
thereby
increasing
crystallinity
reducing
water
loss.
experimental
results
confirm
improve
properties
slurry
high-pressure,
high-temperature
(HPHT)
conditions.
This
research
underscores
potential
sustainable
additives
for
optimizing
performance
under
challenging
HPHT
paving
way
advancements
construction
practices.
