In
this
work,
a
novel
alginate/polyvinylpyrrolidone
(SA/PVP-Fe)
hydrogel
spheres
were
prepared
by
cross-linking
with
Fe2+
ions
after
blending
sodium
alginate
polyvinylpyrrolidone.
The
degradation
performance
of
the
hydrogels
was
assessed
through
phenol,
achieving
100%
and
about
64%
total
organic
carbon
(TOC)
mineralization
within
60
minutes
(initial
concentration
phenol=20
mg/L;
H2O2
concentration=5
mM;
initial
pH=6.5;
catalyst
dosage=1.0
g/L).
Degradation
kinetics
monitored
using
high-performance
liquid
chromatography
(HPLC).
structural
chemical
properties
characterized
scanning
electron
microscopy
(SEM),
energy
spectroscopy
(EDS),
Fourier
transform
infrared
(FTIR),
X-ray
photoelectron
(XPS).
Additionally,
exhibited
multiple
reuse
cycles,
albeit
gradual
decline
in
performance.
Mechanistic
investigations
revealed
that
hydroxyl
radical
derived
from
Fenton
reaction
primary
active
species
responsible
for
process.
This
research
provides
valuable
insights
into
improving
mechanical
hydrogels,
opening
up
avenues
their
practical
applications.
Desalination and Water Treatment,
Год журнала:
2024,
Номер
318, С. 100384 - 100384
Опубликована: Апрель 1, 2024
Advanced
oxidation
processes
(AOPs)
have
become
increasingly
more
useful
and
necessary
in
the
past
few
decades
because
they
can
degrade
a
wide
range
of
organic
inorganic
contaminants.
The
toxic
recalcitrant
nature
many
contaminants
obstruct
traditional
biological
processes,
making
treatment
ineffective.
Therefore,
there
is
pressing
need
to
develop
apply
effective
for
industrial
wastewater,
polluted
by
pharmaceuticals,
dyes,
other
industries.
AOPs
successful
technologies
treating
wastewater
remove
contaminants,
reduce
toxicity,
improve
biodegradability,
including
using
ultraviolet
(UV)
visible
light
(VIS)
combined
with
homogenous
or
heterogeneous
catalysts.
This
review
shows
that
Fenton
process
semiconductor
material
greatly
facilitates
removing
various
pollutants.
Additionally,
photocatalysis
research
ongoing
this
method
effectively
removes
emerging
In
addition,
challenges,
needs,
future
uses
are
described
performance
hasten
large-scale
implementation
water
treatment.
Sustainability,
Год журнала:
2023,
Номер
15(11), С. 8815 - 8815
Опубликована: Май 30, 2023
The
demand
for
energy
has
increased
tremendously
around
the
whole
world
due
to
rapid
urbanization
and
booming
industrialization.
Energy
is
major
key
achieving
an
improved
social
life,
but
production
utilization
processes
are
main
contributors
environmental
pollution
greenhouse
gas
emissions.
Mitigation
of
crisis
reduction
in
(water
air)
difficulties
leading
research
topics
nowadays.
Carbonaceous
materials
offer
some
best
solutions
minimize
these
problems
easy
effective
way.
It
also
advantageous
that
sources
carbon-based
economical,
synthesis
comfortable,
applications
environmentally
friendly.
Among
carbonaceous
materials,
activated
carbons,
graphene,
carbon
nanotubes
have
shown
outstanding
performance
mitigating
pollution.
These
three
exhibit
unique
adsorption
properties
storage,
water
purification,
cleansing
their
electrical
conductivity,
large
specific
surface
areas,
strong
mechanical
strength.
This
paper
reviews
methods
nanotubes,
graphene
significant
treatment,
dioxide
capture
improve
sustainability.
Results in Engineering,
Год журнала:
2024,
Номер
22, С. 102220 - 102220
Опубликована: Май 4, 2024
The
groundwater
(GW)
of
Bangladesh
is
predominantly
contaminated
with
arsenic
(As)
and
iron
(Fe)
which
has
a
bad
impact
on
human
health.
We
tried
to
remove
these
elements
easily
available
mahogany-fruit
(Swietenia
mahagoni)
husk
charcoal
(MHC)
banana
(Musa
acuminata)
peduncle
(BPC).
trial
was
implemented
3
replications
throughout
the
research.
sampled
GW
contained
0.06
mg
As
L-1
4.83
Fe
L-1.
Firstly,
pH
3,
5,
7,
9
250
dose.
MHC
removed
almost
91.05%
at
5.0,
BPC
86.67%
9.
However,
in
case
Fe,
100%
7
9;
same
quantity
Secondly,
contact
times
were
0,
10,
20,
40
minutes
dose
7.0.
maximum
removal
5
minutes.
pseudo-first-order
kinetic,
pseudo-second-order
intra-particle
diffusion
models
considered.
result
showed
that
rate
adsorption
followed
kinetic
model.
Lastly,
adsorbent
doses
50,
150,
250,
350
At
highest
79.47%
for
MHC.
Similarly,
values
79.29%
BPC,
indicating
are
good
heavy
metals
removal.
Results in Engineering,
Год журнала:
2024,
Номер
23, С. 102500 - 102500
Опубликована: Июль 3, 2024
This
paper
introduces
a
novel
approach
for
the
synthesis
of
photocatalytic
nanocomposites
via
fast
reaction
occurring
at
ambient
conditions
between
strong
base
NaOH
and
FeCl3
solution
to
obtain
fresh
precipitate
Fe(OH)3
in
presence
TiO2
nanoparticles.
FE-SEM
analysis
revealed
restructured
state
particles
on
surface
colloidal
Fe(OH)3.
Solid-phase
studies,
including
XRD
FT-IR,
indicated
phase
transformation
from
γ-Fe2O3
during
formation
nanocomposite.
UV–Vis
diffuse
reflectance
measurements
confirmed
significant
reduction
band
gap
synthesized
composite,
indicating
its
potentials
as
photocatalyst
under
visible
light
irradiation.
Another
advantage
this
composite
type
is
rapid
sedimentation
ability
within
minutes,
facilitating
post-processes
such
separation
catalyst
reuse
large
scale,
which
are
challenging
case
Inducing
photocatalysis
light,
efficiency
degrading
persistent
colorants
was
demonstrated
through
study
indigo
carmine
(IC),
exhibited
threefold
improvement
degradation
nanocomposite
compared
original
TiO2.
Indeed,
IC
process
studied
consideration
various
factors
Fe/Ti
ratio
catalyst,
illumination
time,
colorant
concentration,
dosage,
pH
environment.
Additionally,
mineralization
studies
oxidation
CO2
rather
than
potentially
toxic
intermediates.
Furthermore,
stability
examined
six
cycles
reuse.
Eng—Advances in Engineering,
Год журнала:
2024,
Номер
5(4), С. 2633 - 2661
Опубликована: Окт. 15, 2024
Wastewater
Treatment
Plants
(WWTPs)
encompass
a
range
of
processes
from
preliminary
to
advanced
stages.
Conventional
treatments
are
increasingly
inadequate
for
handling
emergent
pollutants,
particularly
organic
compounds
with
carcinogenic
potential
that
pose
risks
aquifers.
Recent
advancements
prioritize
integrating
Advanced
Oxidation
Processes
(AOPs)
and
adsorbents
conventional
methods
effectively
retain
pollutants
enhance
mineralization.
There
is
growing
preference
non-chemical
or
minimally
chemical
approaches.
Innovations
such
as
combining
ozone
other
biological
photo-sono-assisted
methods,
alongside
AOPs
adsorbents,
promising.
These
approaches
leverage
catalyst-assisted
reactions
optimize
oxidation
efficiency.
This
review
aims
provide
holistic
perspective
on
WWTP
processes,
spanning
wastewater
intake
the
production
potable
water,
highlighting
key
technologies,
operational
challenges,
future
trends.
The
focus
advancing
sustainable
practices
enhancing
treatment
efficacy
safeguard
water
quality
address
evolving
environmental
concerns
effectively.
Results in Engineering,
Год журнала:
2023,
Номер
20, С. 101444 - 101444
Опубликована: Сен. 25, 2023
The
present
study
focuses
on
the
design
and
development
of
Pt
nanoparticle
(PtNPs)
decorated
reduced
graphene
oxide
(RGO)
nanohybrid
as
an
efficient
heterogeneous
catalyst
towards
reduction
p-nitrophenol
(p-NP)
methylene
blue
(MB).
citrate
chloroplatinic
acid
in
presence
amino-propyl
trimethoxy
silane
(APTMS)
modified
(GO)
produced
RGO/PtNPs
comprised
uniform
high-density
distribution
smaller-sized
PtNPs.
APTMS
provide
nucleation
points
via
their
amino
groups
thereby
play
a
vital
role
regulating
size
well
anchored
PtNPs
approach.
morphological
structural
characterization
was
done
by
using
X-ray
powder
diffraction,
scanning
transmission
electron
microscopy,
Fourier
transform
infrared
Raman
spectroscopic
techniques.
homogeneous
dispersion
endows
superior
catalytic
activity
to
nanohybrid.
exhibited
outstanding
performance
enabling
rapid
both
p-NP
MB
at
ambient
conditions.
estimated
rate
constants
for
were
15.9
×
10−3,
187
10−3
s−1
respectively,
which
outperform
several
previously
reported
metal-based
GO/RGO
nanocatalysts.
recycling
tests
showed
that
maintained
good
stability
even
after
fifth
recycle
run.
can
be
exploited
sustainable
other
environmental
pollutants
also.
Further,
strategy
followed
achieve
homogenous
nanoparticles
could
adopted
anchoring
metal/metal
oxide/semiconductor
nanoparticles.
