Processes,
Год журнала:
2023,
Номер
11(11), С. 3211 - 3211
Опубликована: Ноя. 10, 2023
Granular
and
powdery
clinoptilolite
tuff
samples
from
Beli
Plast,
Eastern
Rhodopes,
Bulgaria,
were
coated
with
metal
hydroxides
(Fe,
Al,
Fe-Mg)
by
two-step
alkalization.
The
prepared
sorbents
tested
for
As(III)
As(V)
uptake
a
modeled
water
solution
an
arsenic
concentration
of
44
μg/L.
granular
sorbent
was
used
in
the
sorption
columns
showed
high
efficiency
purification
slightly
polluted
waters.
calculated
maximum
capacity
optimal
conditions
is
32.9
μg/g.
adsorption
proceeds
according
to
Langmuir
model.
mechanism
most
likely
inner-sphere
complexation.
sorbents’
complete
regeneration
achieved
NaOH
treatment.
results
experiments
show
good
possibilities
obtaining
ranging
below
limit
detection
3.8
µg/L,
which
significantly
lower
value
than
permitted
10
μg/L
close
national
environmental
quality
standard
shallow
shows
Fe-
or
Mg,Fe-coated
sorbents.
are
highly
efficient
purifying
400
liters
initial
mg/L
either
arsenate
arsenite
per
1
kilogram
at
rate
2.4–2.0
L/h/kg.
powdered
batch
system
under
“static”
much
higher
one.
Such
more
suitable
small
quantities
arsenic.
Agriculture,
Год журнала:
2025,
Номер
15(7), С. 786 - 786
Опубликована: Апрель 5, 2025
The
aim
of
this
study
was
to
evaluate
the
influence
innovative
mineral–organic
mixtures
containing
zeolite
composites
produced
from
fly
ashes
and
lignite
or
leonardite
on
fractional
composition
soil
organic
matter
in
sandy
loam
under
two-year
pot
experiments
with
maize.
(SOM)
analyzed
changes
functional
properties
groups
were
identified
using
ATR-FTIR
method.
Changes
content
phenolic
compounds
assessed,
potential
impact
fertilizer
carbon
stocks
investigated.
addition
these
improved
stability
SOM.
application
significantly
increased
total
(TOC)
by
18%
after
2nd
year
experiment.
maximum
TOC
observed
33%
MC3%Leo3%
amendment.
Nitrogen
62%
MV9%Leo6%
additive,
indicating
fertility.
highlighted
an
increase
fulvic
acid
relative
humic
carbon,
signaling
positive
quality.
new
specific
(ATR-FTIR)
present
matrix,
compared
mineral
fertilization
alone.
additive
also
contributed
stocks,
highlighting
their
for
long-term
improvement
fertility
sequestration.
Journal of Applied Polymer Science,
Год журнала:
2023,
Номер
140(48)
Опубликована: Сен. 25, 2023
Abstract
In
this
study,
a
fly
ash
(FA),
primarily
composed
of
SiO
2
,
Al
O
3
Fe
MgO,
and
CaO,
as
synergistic
additive
(1–5
wt%)
was
added
to
enhance
the
effectiveness
an
intumescent
flame
retardant
(IFR)
system
(25
in
polypropylene
(PP).
The
composites
were
characterized
by
various
tests
study
thermal,
combustion,
mechanical
properties.
Experimental
results
revealed
that
both
IFR
IFR/FA
additions
led
early
degradation
at
lower
rates,
with
increased
residual
mass
values.
thermal
conductivity
coefficient
up
16.9%
additions.
While
sample
containing
only
met
UL
94
V‐0
requirements
limiting
oxygen
index
(LOI)
value
30.0%,
addition
1%
2%
FA
satisfied
criteria
LOI
values
32.8%
34.9%,
respectively.
Cone
calorimeter
indicated
had
significant
positive
impacts
on
burning
characteristics
PP.
Furthermore,
incorporation
reinforced
char
layer
formed
IFR,
thereby
enhancing
fire
resistances
composites.
Although
tensile
strength
modulus
decreased
addition,
Izod
impact
increased.
Additionally,
slightly
improved
properties
PP/IFR
Materials,
Год журнала:
2024,
Номер
17(4), С. 954 - 954
Опубликована: Фев. 19, 2024
The
studies
aimed
to
test
the
adsorption
capacity
of
two
silica-enriched
porous
materials,
synthetic
Na-X
zeolite
and
Mn-containing
carbon
composite,
towards
Pb(II)
Zn(II)
ions
in
single
mixed
systems
presence
diclofenac
(DCF)
(or)
poly(acrylic
acid)
(PAA).
was
characterized
by
a
well-developed
surface
area
728
m2/g
pore
diameter
1.73
nm,
while
composite
exhibited
268
7.37
respectively.
found
be
more
efficient
than
(75–212
mg/g)
adsorbing
heavy
metal
both
bimetallic
(322–333
mg/g).
In
turn,
C/Mn/SiO2
effective
removing
from
that
simultaneously
contained
DCF
or
PAA
(480
476
mg/g,
respectively).
demonstrated
greatest
stability
all
studied.
highest
observed
+
mixture,
contrast
composites
where
much
lower.
To
evaluate
possibility
regeneration
solids,
HCl
proved
best
desorbent
for
(efficiency
99%).
general,
adsorbents
offer
promising
potential
solving
environmental
problems.
Materials,
Год журнала:
2023,
Номер
16(18), С. 6094 - 6094
Опубликована: Сен. 6, 2023
In
this
study,
municipal
solid
waste
incineration
(MSWI)
fly
ash
was
subjected
to
mineral
carbonation
with
the
aim
of
investigating
CO2
sequestration
in
material.
The
conducted
study
follows
trend
searching
for
alternatives
natural
materials
ability
sequestrate
CO2.
MSWI
allowed
storage
up
0.25
mmol
g−1.
Next,
both
carbonated
and
uncarbonated
ashes
were
activated
using
an
alkaline
activation
method
by
means
two
different
agents,
namely
potassium
hydroxide
silicate
or
sodium
silicate.
Mineral
caused
a
drop
compressive
strength
alkali-activated
materials,
probably
due
formation
and/or
carbonates.
maximum
obtained
3.93
MPa
after
28
days
8
mol
dm−3
KOH
(ratio
3:1).
relative
ratio
hydroxide:silicate
also
influenced
mechanical
properties
materials.
Both
ashes,
as
well
their
derivatives,
characterized
detail
XRD,
XRF,
FTIR.
TG
analysis.
results
have
proved
importance
further
research
terms
high-calcium
(HCFA)
utilization.
Scientific Reports,
Год журнала:
2023,
Номер
13(1)
Опубликована: Авг. 30, 2023
Abstract
The
major
cause
of
soil
degradation
(contamination,
erosion,
compaction)
is
closely
linked
to
agriculture,
i.e.,
unsustainable
agriculture
practices,
which
are
reflected
in
the
depletion
organic
carbon
pool,
loss
biodiversity,
and
reduction
C
sink
capacity
soils.
Therefore,
agricultural
practice
applying
carbon-rich
materials
into
an
attractive
solution
for
climate
change
mitigation
ecosystem
sustainability.
paper
aimed
evaluate
effectiveness
addition
organic-mineral
mixtures
mineral
salts
(NPK),
including
exogenous
matter
(lignite)
mixed
with
zeolite-carbon
(NaX-C)
or
zeolite-vermiculite
(NaX-Ver)
composites
restoration
soils
contaminated
PAHs.
zeolite
fertilizer
resulted
a
significant
PAH
levels
corresponding
plant
tissue
content,
without
compromising
yields,
compared
control
separate
application
NPK.
A
Significant
correlation
between
PAHs
pH
H2O
,
KCl
EC
dehydrogenase
activity
(DhA)
was
found
lignite
significantly
reduced
content
straws,
especially
following
NaX-C.
However,
case
grains,
highest
percentage
comparison
NPK
observed
dose
NaX-Ver.
Materials,
Год журнала:
2024,
Номер
17(3), С. 653 - 653
Опубликована: Янв. 29, 2024
The
main
outcome
of
this
research
was
to
demonstrate
the
opportunity
obtain
a
stable
and
well-ordered
structure
MCM-41
synthesized
from
fly
ash.
A
series
bimetallic
(Cu/Mn)
catalysts
supported
at
were
prepared
via
grinding
method
investigated
in
catalytic
toluene
combustion
reaction
show
material's
potential
application.
It
proved,
that
Cu/Mn
ratio
had
crucial
effect
on
activity
materials.
best
performance
achieved
with
sample
Cu/Mn(2.5/2.5),
for
which
temperature
50%
conversion
found
be
300
°C.
This
value
remains
line
literature
reports,
comparable
attained
3-fold
higher
metal
loadings.
Time-on-stream
experiment
proved
thermal
stability
catalyst
Cu/Mn(2.5/2.5).
obtained
results
bring
valuable
background
field
ash
utilization,
where
ash-derived
can
considered
as
efficient
support
dispersion
active
phase
preparation.
