BIO Web of Conferences,
Journal Year:
2024,
Volume and Issue:
139, P. 06032 - 06032
Published: Jan. 1, 2024
In
this
study,
biochar
produced
from
pomegranate
peels
and
treated
by
magnetization
was
prepared
in
the
treatment
of
water
contaminated
with
nickel
ions.
The
percentage
removal
at
a
weight
(0.025)
mg/L
magnetized
(98.761%)
concentration
(15
ppm),
under
influence
acid
function
(99.188%)
where
pH=3
same
concentration,
while
shaking
time
(99.402%)
15
minutes
0.025
ppm.
As
for
impact
temperature
on
adsorption
process,
we
find
that
amount
ions
increases
increasing
temperature.
This
indicates
process
is
an
endothermic
process.
means
value
ΔH
positive
value.
presence
absorption
time,
weight,
pH
3,
328
(99.615%).
From
results,
adsorbed
material
as
Nano
Fe
2
O
3
/PP
decreases.
due
to
increase
surface
area
material,
ion
linked
active
sites
electrostatic
forces.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Oct. 23, 2024
This
study
investigates
the
formation
of
duplex
electroless
Ni-P/Ni-B
and
Ni-P/Ni-B-W
alloys
through
plating
process
coatings
on
mild
steel
using
hypophosphite
sodium
borohydride
as
a
reducing
agent,
employing
heat-treated.
Electroless
is
affordable
suitable
for
coating
convoluted
structures.
Duplex
was
characterized
by
X-ray
diffraction
(XRD),
Energy-dispersive
spectrometry
(EDS),
scanning
electron
microscopy
(SEM)
were
used
to
examine
surface
cross-sectional
morphologies
coating,
finally
electrochemical
corrosion
properties.
The
analysis
reveals
that
yields
thicker,
more
homogeneous
with
characteristic
cauliflower
morphology
spherical
nodular
initially
amorphous,
but
crystallized
when
heated
400
°C.
More
resistance
found
in
layers
Ni-B
served
outer
covering.
focuses
important
effects
varying
tungsten
concentrations
heat
treatment
resistance,
quality,
microstructural
characteristics
coatings.
Showed
improved
exposed
0.5
g/L
Na
Water,
Journal Year:
2025,
Volume and Issue:
17(7), P. 1071 - 1071
Published: April 3, 2025
Electroless
nickel
plating
is
a
chemical
deposition
process
in
which
ions
within
solution
are
reduced
by
reducing
agent
and
subsequently
deposited
onto
the
surface
of
solid
substrate.
Chemical
nickel-plating
wastewater
contains
substantial
amounts
phosphorus
as
well
abundant
resources.
In
this
study,
electrodialysis
coupled
with
advanced
oxidation
techniques
was
utilized
for
efficient
recovery
from
spent
solutions.
The
end-of-life
tank
treated
via
to
remove
harmful
phosphite
sulfate
ions,
enabling
purified
be
reused
production
supplementing
it
appropriate
sodium
hypophosphite
sulfate.
Subsequently,
concentrate
generated
using
peroxydisulfate
(PDS)-based
technology
break
complexation
simultaneously
promote
ions.
Finally,
Ca(OH)2
employed
precipitating
effectively
recover
concentrate.
From
an
economic
perspective,
optimal
conditions
were
determined
follows:
current
density
20
mA/cm2,
concentrate-to-dilute
water
volume
ratio
1:1,
speed
1.0
m3/h,
concentration
g/L.
Under
these
conditions,
migration
rates
H2PO2−
HPO32−
reached
67.3%
62.53%,
respectively,
whereas
Ni2+
exhibited
significantly
lower
mobility
at
only
6.77%.
recovered
approximately
60%
its
initial
activity.
Regarding
concentrate—which
by-product
electrodialysis—the
nearly
completely
oxidized
PDS
dosage
0.3
mol/L.
Furthermore,
when
Ca/P
molar
adjusted
2.0,
total
(TP)
(Ni)
removal
efficiencies
exceeded
98%
93%,
respectively.
Materials,
Journal Year:
2025,
Volume and Issue:
18(9), P. 1981 - 1981
Published: April 27, 2025
GCr15
bearing
steel
is
widely
used
in
the
textile,
aerospace,
and
other
industries
due
to
its
excellent
mechanical
properties.
However,
traditional
electroless
Ni-B
coatings
can
no
longer
meet
growing
demand
for
a
long
service
life
under
high-speed
heavy
load
conditions.
This
study
focused
on
depositing
Ni-B-Mo
alloy
steel.
An
orthogonal
experimental
design
was
adopted
investigate
effects
of
NiCl2
Na2MoO4
concentrations
deposition
time
rate
surface
hardness
coatings.
The
results
show
that
concentration
has
most
significant
impact
rate.
optimal
5.6
g/L
improved
both
(up
881
HV),
while
excessive
(>15.6
g/L)
reduced
coating
adhesion
wear
resistance.
A
1-2
h
ensured
high
rate,
but
after
3
h,
bath
component
depletion
lowered
caused
defects.
(20-30
had
relatively
minor
influence
stabilized
Ni2+
ion
supply,
enhancing
compactness.
optimized
parameters
were
Na2MoO4,
25
NiCl2,
2
deposition.
exhibited
hardness,
strong
adhesion,
After
heat
treatment
at
400
°C
1
transitioned
from
being
amorphous
nanocrystalline,
forming
Ni2B,
Ni3B,
Mo2C
phases,
increasing
737.49
HV
916.19
reducing
friction
coefficient
0.38.
