Sustainability,
Год журнала:
2025,
Номер
17(3), С. 1240 - 1240
Опубликована: Фев. 4, 2025
Geopolymers
are
a
sustainable
alternative
to
Portland
cement,
with
the
potential
significantly
reduce
carbon
footprint
of
conventional
cement
production.
This
study
investigates
valorization
industrial
waste
iron
powder
(IP)
as
fine
filler
in
geopolymers
synthesized
from
volcanic
tuff
(VTF).
Composites
were
prepared
IP
substitutions
5%,
10%,
and
20%
by
weight,
using
sodium
hydroxide
silicate
alkaline
activators.
Microstructural
phase
analyses
conducted
scanning
electron
microscope
coupled
energy
dispersive
X-ray
spectroscopy
(SEM-EDS),
fluorescence
(XRF),
diffraction
(XRD),
differential
calorimetry
(DSC),
while
rheological
properties,
compressive
strength,
flexural
strength
assessed.
The
impact
curing
temperatures
(25
°C
80
°C)
on
mechanical
performance
was
evaluated.
Results
revealed
that
air
content
increased
3.5%
substitution,
accompanied
slight
rise
flow
time
(0.8–2
s).
Compressive
strengths
at
25
decreased
up
22.48%
28.39%,
respectively.
Elevated
further
reduced
an
average
45.30%
64.68%,
highlighting
adverse
effects
higher
temperatures.
Although
these
formulations
not
suitable
for
load-bearing
applications,
findings
suggest
non-structural
uses,
such
pavement
base
layers,
aligning
construction
principles
repurposing
reducing
reliance
energy-intensive
E3S Web of Conferences,
Год журнала:
2023,
Номер
430, С. 01203 - 01203
Опубликована: Янв. 1, 2023
This
article
investigates
the
possible
synergy
between
geopolymers
and
plastics
as
a
method
for
sustainable
composite
materials,
addressing
growing
worldwide
need
environmentally
responsible
solutions.
Geopolymers,
which
provide
low-carbon
alternatives
to
traditional
building
are
being
studied
alongside
plastics,
recognised
their
flexibility
lightweight
properties.
The
research
emphasises
ability
of
this
attain
increased
mechanical,
thermal,
chemical
qualities
by
investigating
molecular-level
interaction
processes,
enhanced
material
properties,
applications
in
diverse
sectors.
Furthermore,
assesses
environmental
consequences,
such
decreased
carbon
emissions
energy
usage,
while
also
analysing
manufacturing
scaling
problems.
work
lays
way
unique
route
science,
poised
greatly
contribute
more
resilient
built
environment,
giving
insights
into
both
present
accomplishments
future
possibilities.
Environmental Advances,
Год журнала:
2024,
Номер
16, С. 100524 - 100524
Опубликована: Март 29, 2024
The
increase
in
the
cement
industry's
production,
especially
production
of
Ordinary
Portland
Cement
(OPC),
increases
amount
CO2
released
into
atmosphere,
one
main
greenhouse
gases
responsible
for
global
warming,
with
harmful
effects
on
environment
and
human
health.
Against
this
background,
geopolymer
concrete
is
a
new
type
inorganic
polymer
material
that
has
attracted
attention
researchers
building
area,
due
to
recycling
waste
by-products
replace
OPC
reducing
gas
(CO2)
emissions
during
its
manufacture.
It
also
exhibits
better
mechanical,
thermal,
chemical,
electrical
properties
than
OPC-based
concrete.
In
same
environmental
context,
wastewater
treatment
because
specific
surface
area
capability
adsorption,
photodegradation,
encapsulation
organic
pollutants.
principal
focus
paper
provide
an
in-depth
overview
works
have
been
undertaken
explore
geopolymer-type
materials.
will
attempt
develop
comprehensive
database,
based
last
research
published
between
2010
2023
about
247
references,
which
explains
elaboration,
characterization,
application
these
materials
several
fields.
Therefore,
it
estimated
composites
are
promising
future
candidates
industrial
solid
waste,
partial
or
total
replacement
OPCs
construction
industry,
development
adsorbents
catalysts
treatment.
RSC Advances,
Год журнала:
2025,
Номер
15(3), С. 1989 - 2010
Опубликована: Янв. 1, 2025
The
ACP
adsorbent,
a
blend
of
activated
carbon
and
phosphoric
acid-based
geopolymer
foam,
showed
high
methylene
blue
adsorption
efficiency,
aligning
with
the
Langmuir
isotherm,
PSO
kinetics,
ANN-based
predictions.
Materials,
Год журнала:
2023,
Номер
16(9), С. 3478 - 3478
Опубликована: Апрель 29, 2023
The
demand
for
geopolymer
materials
is
constantly
growing.
This,
in
turn,
translates
into
an
increasing
number
of
studies
aimed
at
developing
new
approaches
to
the
methodology
synthesis.
range
potential
applications
geopolymers
can
be
increased
by
improving
properties
components.
Future
directions
on
aim
showing
excellent
mechanical
but
also
demonstrating
significant
improvement
thermal,
magnetic,
or
sorption
characteristics.
Additionally,
current
efforts
focus
not
only
materials'
obtaining
them
as
a
result
environment-friendly
performed
line
with
circular
economy
assumptions.
Scientists
look
smart
and
economical
solutions
such
that
small
amount
modifier
will
translate
functional
properties.
Thus,
special
attention
paid
application
nanomaterials.
This
article
presents
selected
nanoparticles
incorporated
matrices,
including
carbon
nanotubes,
graphene,
nanosilica,
titanium
dioxide.
review
was
prepared
employing
scientific
databases,
particular
given
nanocomposites.
purpose
this
discuss
nanocomposites
context
sustainable
development
approach.
Importantly,
main
influence
these
nanomaterials
physicochemical
Such
combination
technology
nanotechnology
seems
promising
terms
preparation
variety
uses.
Desalination and Water Treatment,
Год журнала:
2024,
Номер
320, С. 100607 - 100607
Опубликована: Июль 15, 2024
This
study
aims
to
enhance
local
bentonite's
effectiveness
in
removing
methylene
blue
and
procion
deep
red
dyes
from
aqueous
media
through
organic
modification
with
cetyltrimethylammonium
bromide
surfactant.
Raw
modified
bentonites
were
analyzed
using
XRF,
XRD,
FTIR,
BET/BJH,
DSC
techniques.
The
bentonite
showed
a
crystalline
structure
mesoporous
morphology
heterogeneous
surface.
Optimal
adsorption
conditions
for
MB
dye
0.2
g
adsorbent
dose,
60
min
contact
time,
mg/L
initial
concentration,
pH
8,
achieving
maximum
sorption
capacity
of
6.418
mg/g.
For
PDR
dye,
optimal
0.125
40
30
acidic
pH,
8.503
Isotherm
analysis
indicated
the
Langmuir
model
best
fits
data,
suggesting
mono-layer
process.
Kinetic
investigations
revealed
that
follows
pseudo-second-order
model,
indicating
chemisorption
mechanism.
Thermodynamic
results
exothermic
endothermic
PDR.
work
highlights
potential
surfactant-modified
as
cost-effective
sorbent
treating
polluted
systems,
effectively
both
cationic
anionic
dyes.
Separation and Purification Technology,
Год журнала:
2023,
Номер
330, С. 125568 - 125568
Опубликована: Ноя. 3, 2023
To
mitigate
the
presence
of
tetracyclines
in
water,
it
is
essential
to
implement
proper
wastewater
treatment
processes
that
can
effectively
remove
these
compounds.
In
this
work
we
develop
a
polymeric
filtration
membrane
functionalized
with
nanocrystals
metallic
organic
framework,
designated
by
HKUST-1.
The
was
evaluated
for
remotion
oxytetracycline
(OTC),
tetracycline
(TC),
and
chlortetracycline
(CTC)
water
samples.
fabricated
using
polysulfone
(PSU),
polyethyleneglycol
(PEG),
MOF
(HKUST-1),
N-methyl-2-pyrrolidone
(NMP)
through
nonsolvent
induced
phase
separation
(NIPS)
method.
presents
best
antibiotic
rejection
characteristics
prepared
15%
(w/w)
PSU,
3%
PEG,
1%
HKUST-1,
81%
(NMP).
This
exhibited
pure
flux
up
76.2
L.m-2.h-1,
approximately
40
times
more
than
one
achieved
pristine
membranes.
Once
determined
composition,
physical-chemical
characterization
done.
A
high
rate
obtained
OTC,
TC,
CTC,
around
91%,
99%
respectively.
pH
solutions
has
strong
influence
on
rejection.
results
suggest
intermolecular
forces
such
as
π-π
type
interactions
hydrogen
bonds
exist
between
neutral
molecules
(pH>pKa1
pKa2.
Furthermore,
FTIR
spectra
demonstrate
formation
Cu-tetracycline
complex
another
adsorption
mechanism.
Finally,
interaction
mixture
removal
performance
evaluated.
study
revealed
superior
performance,
even
over
extended
periods
time,
despite
having
lower
initial
concentration
mixture.
innovative
represents
new
generation
highly
efficient
filter
systems
specifically
designed
purification
purposes.
