This
study
aimed
to
investigate
the
preparation
of
activated
electrolytic
manganese
residue
(AEMR)-slag-cement
ternary
blended
cementitious
material
and
analyze
its
hydration
characteristics,
micromechanical
properties,
carbon
emissions.
The
results
revealed
that
optimal
AEMR
dosage
in
was
15%The
fluidity
S5-AEMR-15
measured
at
207
mm,
with
a
compressive
strength
44.28
MPa
28
d.
Similarly,
S15-AEMR15
exhibited
191.5
mm
44.23
alkali-sulfate
synergistic
excitation
system
formed
by
composite
effectively
enhanced
activity
slag
AEMR,
resulting
generation
more
products
such
as
Ca(OH)2,
ettringite,
C-(A)-S-H
gel,
hydrotalciteAdditionally,
mortars
showed
decrease
total
emissions
an
increase
mineral
admixture
dosage,
indicating
potential
for
reduction
AEMR-slag-cement
material.
provides
effective
approach
Applied Sciences,
Journal Year:
2025,
Volume and Issue:
15(3), P. 1469 - 1469
Published: Jan. 31, 2025
The
global
problem
of
water
scarcity
is
exacerbated
by
the
continued
contamination
potable
sources.
This
preliminary
study
investigates
potential
a
hazardous
industrial
jarosite
waste
to
adsorb
As(V)
and
Cr(III)
from
contaminated
waters.
results
showed
that
this
mining
effectively
adsorbed
both
Cr(III),
demonstrating
its
as
low-cost
sustainable
solution
for
remediation
along
with
use
also
contaminates.
adsorption
process
was
optimized,
effects
various
parameters
on
capacity
were
investigated.
findings
suggest
toxic
residues
in
porous
concrete
could
provide
promising
approach
removal
heavy
metals
polluted
sources,
contributing
development
more
environmentally
friendly
treatment
technologies.
A
maximum
90.6%
96.3%
achieved,
it
verified
initially
contained
about
0.44%
As,
which
later
leached
during
decomposition;
again,
able
re-adsorb
Cr(III).
Ecotoxicology and Environmental Safety,
Journal Year:
2025,
Volume and Issue:
292, P. 117927 - 117927
Published: March 1, 2025
Arsenic
(As)
is
a
carcinogen
that
threatens
ecosystems
and
human
health.
Due
to
its
high
adsorption,
microporosity,
biochar
widely
available
for
soil
remediation.
This
review
significantly
summarizes
the
current
status
of
waste
biomass
feedstock-based
metal-modified
As-contaminated
Firstly,
this
paper
briefly
describes
sources
hazards
As
in
soil,
secondly,
lists
eleven
feedstocks
preparing
biochar.
Agricultural,
domestic,
forestry
wastes
provide
plentiful
source
preparation.
Single
or
multi-metal
modifications
such
as
iron
(Fe),
manganese
(Mn),
cerium
(Ce)
can
effectively
improve
Arsenite
[As(III)]
arsenate
[As(V)]
adsorption
capacity
The
primary
mechanisms
removal
by
include
ion
exchange,
electrostatic
attraction,
surface
complexation,
redox
transformation,
H-bond
formation.
In
conclusion,
presents
an
in-depth
discussion
on
both
metal
modification,
providing
constructive
suggestions
future
development
remediate
soil.
Materials,
Journal Year:
2025,
Volume and Issue:
18(6), P. 1218 - 1218
Published: March 10, 2025
A
novel
composite
cementitious
material
was
constructed
by
synergistically
utilizing
multiple
industrial
solid
wastes,
including
electrolytic
manganese
residue
(EMR),
red
mud
(RM),
and
ground
granulated
blast
furnace
slag
(GGBS),
with
calcium
hydroxide
[Ca(OH)2]
as
an
alkaline
activator.
In
addition,
the
mechanical
properties
of
materials
were
systematically
analyzed
under
different
raw
ratios,
alkali
activator
dosages,
water-binder
ratios.
To
further
investigate
hydration
products
mechanisms
material,
characterization
methods,
for
instance,
XRD,
FT-IR,
SEM-EDS,
TG-DTG,
employed
to
characterize
materials.
ensure
that
does
not
cause
additional
environmental
pressure,
it
toxic
leaching.
The
relevant
experimental
results
indicate
optimal
ratio
EMR–RM–GGBS–Ca(OH)2
components
is
EMR
content
20%,
RM
15%,
GGBS
52%,
13%,
0.5.
Under
ratio,
at
28
days
exhibited
a
compressive
strength
27.9
MPa,
well
flexural
7.5
MPa.
in
as-synthesized
system
primarily
encompassed
ettringite
(AFt)
hydrated
silicate
(C-S-H),
their
tight
bonding
middle
later
curing
stages
main
source
engineering
strength.
heavy
metal
concentrations
28-day
leaching
solution
fall
within
limits
prescribed
drinking
water
hygiene
standard
(GB5749-2022),
indicating
this
exhibits
satisfactory
safety
performance.
sum
up,
elucidated
process
involved
research
provide
useful
references
pollution-free
treatment
resource
utilization
wastes
such
future.
