Minerals,
Год журнала:
2024,
Номер
14(8), С. 782 - 782
Опубликована: Июль 31, 2024
The
high-temperature
roasting/smelting
process
of
copper
and
zinc
concentrates
will
cause
the
mercury
in
concentrate
to
evaporate
into
flue
gas,
most
gas
eventually
enter
waste
acid
its
ionic
form.
A
highly
efficient
removal
agent
M201
with
long
carbon
chains
loaded
active
functional
groups
can
adsorb
disperse
fine
particles
for
system.
Through
bridging,
linear
structure
is
woven
a
network
achieve
large-scale
capture
dispersion
colloidal
substances.
recommended
operating
conditions
developing
deep
purification
technology
are
as
follows:
reagent
concentration
50
g/L,
6
mL/L
added
solution,
room
temperature,
mixing
time
5
min,
air
flotation
10
ventilation
rate
0.1
L/min,
H2SO4
33.67
residual
content
2
mg/L
(the
reaches
0.01
after
two-stage
treatment).
Meanwhile,
arsenic
21.9
mg/L.
This
study
shows
better
separation
achieves
one-step
removal.
Environmental Monitoring and Assessment,
Год журнала:
2025,
Номер
197(4)
Опубликована: Март 11, 2025
Heavy
metal
pollution
in
agricultural
soils
pose
significant
risks
to
food
safety
and
human
health,
necessitating
effective
monitoring
assessment
techniques.
Recognizing
characteristic
spectral
features
is
essential
for
accurately
assessing
the
ecological
associated
with
heavy
pollution.
To
explore
potential
of
utilizing
hyperspectrum
evaluate
ecologial
metals
paddy
soil,
study
investigated
characteristics
(350
~
2500
nm)
(Cd,
Pb,
Cr,
Cu)
rice
soil
Xiangtan
County,
Hunan
Province,
China.
Potential
risk
index
(RI)
was
employed
level,
derivative
transformations
(first
R′
second
R″)
were
applied
eliminate
hyperspectral
noise.
Results
identified
Cd
as
primary
pollutant
followed
by
Cu,
Cr.
Serious
concentrated
riverine
cropland
areas.
After
applying
transformations,
correlation
between
reflectance
significantly
improved.
The
R″
transformation
demonstrated
highest
correlations
(r
=
0.95)
at
2046
nm
high
category,
while
exhibited
strongest
negative
−
0.94)
2059
nm.
This
highlights
analysis
an
tool
estimating
posed
soils.
findings
provide
valuable
insights
improving
practices
informing
management
strategies
environments.
Gels,
Год журнала:
2025,
Номер
11(4), С. 224 - 224
Опубликована: Март 21, 2025
This
study
utilized
the
Schiff
base
reaction
as
a
chemical
bonding
method
to
successfully
graft
2-aminopyridine
onto
oxidized
sodium
alginate,
resulting
in
formation
of
modified
alginate
(OSM).
Subsequently,
OSM/polyacrylic
acid
(OSM/PAA)
hydrogel
was
synthesized
via
thermally
initiated
free
radical
polymerization
process
and
evaluated
an
adsorbent
for
removal
heavy
metal
ions
from
wastewater.
Comprehensive
characterization
prepared
samples
performed
using
FT-IR,
SEM,
TGA.
The
influence
temperature,
pH,
dosage,
contact
time,
ion
concentration
on
adsorption
capacity
OSM/PAA
simulated
wastewater
thoroughly
investigated.
Additionally,
detailed
analysis
thermodynamics,
kinetics,
mechanisms
conducted.
Experimental
results
indicated
that
at
25
°C,
pH
5.0,
dosage
0.4
g/L,
maximum
capacities
Cu(II),
Zn(II),
Ni(II)
were
367.64
mg/g,
398.4
409.83
respectively.
These
findings
suggest
by
is
spontaneous,
heterogeneous
with
significant
potential
practical
applications
treatment.
