Case Studies in Construction Materials,
Год журнала:
2024,
Номер
20, С. e02939 - e02939
Опубликована: Фев. 2, 2024
Alkali-activated
fly
ash
(AAFA)
can
offer
both
significant
performance
benefits
and
environmental
advantages
in
corrosive
high-temperature
environments.
However,
the
slow
setting
limited
early
strength
development
of
AAFA
at
ambient
temperature
strict
its
use
to
pre-cast
elements
that
must
be
cured
using
elevated
temperatures.
In
order
address
this
limitation,
experiment
pursued
a
distinctive
approach
produce
pre-polymerized
suspension
(PPS)
ultrafine
(UFA)
was
activated
with
NaOH,
thereby
generating
numerous
nano-scale
zeolite
crystals
amorphous
N-A-S-H
gels.
PPS
used
alongside
UFA
conjunction
create
AAFA.
Combining
mixture,
while
cutting
usage
by
50%,
led
30-minute
initial
time
15
MPa
compressive
after
3
days,
which
significantly
improved
compared
nearly
days
required
control
sample
initially
set.
This
remarkable
result
attributed
accelerated
dissolution
active
Si/Al
ions
from
UFA,
as
well
nucleation
template
effect
gels
within
speeded
up
product's
polyreaction,
resulted
dense
quickly
developed
hardened
structure.
By
PPS,
dependency
on
accompanying
high
energy
consumption
dramatically
reduced.
Additionally,
fast-setting
properties
optimized
paste
make
it
ideal
for
in-situ
construction,
extending
resources.
Green Energy and Resources,
Год журнала:
2024,
Номер
2(1), С. 100062 - 100062
Опубликована: Март 1, 2024
As
a
common
industrial
solid
waste,
fly
ash
requires
proper
processing
and
utilization
to
alleviate
environmental
pressure.
In
contrast
earlier
low-value
treatment
methods
for
ash,
such
as
its
use
in
construction
materials,
it
is
more
practical
explore
the
high-value
of
considering
elemental
ingredient
morphological
characteristics.
Herein,
this
work
comprehensively
reviews
research
progress
extracting
preparing
silica,
alumina,
zeolite
respectively
derived
from
silicon
aluminum
elements
ash.
Specifically,
mechanisms
processes
various
are
elucidated
detail,
virtues
drawbacks
production
technologies
compared
identify
economical
environmentally
friendly
method.
Importantly,
first
energy
storage
electrode
materials.
Different
synthesis
strategies
thoroughly
examined,
especially
fully
utilizing
primary
resource,
converting
into
Finally,
paper
summarizes
opportunities
challenges
associated
with
Journal of Science Advanced Materials and Devices,
Год журнала:
2024,
Номер
9(1), С. 100673 - 100673
Опубликована: Янв. 18, 2024
A
high-speed
dispersion
homogenization-assisted
alkali
fusion-hydrothermal
method
was
successfully
developed
for
the
preparation
of
NaA
zeolite
molecular
sieve
with
excellent
adsorption
performance
ammonia
nitrogen
using
solid
waste
fly
ash.
The
sieve,
prepared
at
a
calcination
temperature
700
°C
and
crystallization
80
°C,
identified
as
through
XRD
SEM
tests,
exhibiting
uniform
ordered
cubic
crystal
structure.
result
BET
analysis
indicates
that
has
specific
surface
area
288.219
m2/g
plentiful
pore
And
effect
pH,
time,
initial
concentration
on
capacity
also
investigated.
fitting
experimental
data
kinetics
isotherm
models
kinetic
solution
by
follows
second-order
model
more
closely.
Langmuir
shows
better
correlation
than
Freundlich
model,
suggesting
is
mainly
based
surface-uniform
monolayer
physical
process.
Under
conditions
pH
=
7
an
100
mg/L,
within
60
min
can
reach
27.5
mg/g,
showing
performance.
This
study
establishes
vital
research
foundation
utilization
ash
treatment
wastewater,
great
ecological
social
benefits.
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(46), С. 17940 - 17949
Опубликована: Авг. 25, 2023
The
utilization
of
steel
slag
for
CO2
sequestration
is
an
effective
way
to
reduce
carbon
emissions.
reactivity
in
depends
mainly
on
material
and
process
parameters.
However,
there
are
many
puzzles
regard
practical
applications
due
the
different
evaluations
parameters
lack
investigation
In
this
study,
318
samples
were
collected
investigate
interactive
influence
12
factors
carbonation
by
machine
learning
with
SHapley
Additive
exPlanations
(SHAP).
Multilayer
perceptron
(MLP),
random
forest,
support
vector
regression
models
built
predict
slurry-phase
slag.
MLP
model
performed
well
terms
prediction
ability
generalization
comprehensive
interpretability.
SHAP
results
showed
that
impact
was
greater
than
Interestingly,
iron
ore
phase
revealed
have
a
positive
effect
analysis.
Combined
previous
literature,
mechanism
proposed.
Quantitative
analysis
based
indicated
had
good
when
mass
fractions
"CaO
+
MgO",
"SiO2
Al2O3",
"Fe2O3",
"MnO"
varied
from
50-55%,
10-15%,
30-35%,
<5%,
respectively.
Journal of Industrial and Engineering Chemistry,
Год журнала:
2024,
Номер
136, С. 177 - 187
Опубликована: Фев. 4, 2024
The
global
issue
of
water
resource
pollution
due
to
wastewater
containing
dyes
is
a
significant
environmental
concern.
proper
treatment
these
harmful
wastewaters
great
challenge
their
characteristic
structural
complexity
and
low
biodegradability.
present
work
reports
the
application
Linde
Type-A
(LTA)
zeolite
synthesized
from
hazardous
aluminum
waste
as
an
adsorbent
remediate
Safranine-T
dye
aqueous
solutions.
optimal
experimental
conditions
(agitation
rate
dosage
147
rpm
21.5
g/L,
respectively)
were
determined
through
central
composite
rotational
design
(CCRD),
enabled
removal
efficiency
98.12
%
textile
dye.
model
that
showed
best
fit
data
better
explained
adsorption
mechanism,
according
isothermal
studies,
was
Sips
model.
kinetics
followed
pseudo-first
order
revealed
achieved
in
contact
time
just
one
minute.
waste-based
LTA
exhibited
highly
promising
properties
with
efficient
extremely
fast
capacity.
Its
use
agent
for
dye-contaminated
can
significantly
contribute
sustainability
circular
economy.
Cleaner Materials,
Год журнала:
2024,
Номер
12, С. 100242 - 100242
Опубликована: Март 26, 2024
This
work
examines
the
environmental
impact
of
low-carbon
concrete
that
incorporates
supplementary
cementitious
materials
(SCMs).
After
reviewing
near-zero
carbon
SCMs
and
concrete,
a
life
cycle
assessment
(LCA)
was
undertaken
for
mix
designs
with
normal-to-high
compressive
strengths,
incorporating
limestone
fly
ash
as
cement
replacements.
The
analysis
includes
relevant
region-specific
inventory
parameters
raw
materials,
energy
production,
transportation.
A
comparative
between
embodied
emissions
material
mechanical
performance
is
then
made.
results
this
paper
indicate
in
can
reduce
emissions,
yet
at
proportional
decrease
properties
compared
to
conventional
concrete.
combination
produced,
on
average,
higher
strength
by
20.5%
lower
CO2-eq
values
21.1%
when
blends.
associated
transportation
main
constituents
production
were
average
below
4%
total
per
mix.
In
addition
eco-mechanical
quantitative
assessments,
study
offers
insights
recommendations
development
considering
global
resource
availability
constituents.
