RSC Advances,
Год журнала:
2024,
Номер
14(48), С. 35993 - 36004
Опубликована: Янв. 1, 2024
Non-homogeneous
ozone-catalyzed
oxidation
technology
is
one
of
the
effective
ways
treating
wastewater,
core
which
lies
in
development
efficient
ozone
catalysts.
This
work
proposes
design
and
synthesis
an
Cu/Mn/Ce
multi-metal
composite
oxide
catalyst
by
metal
salt
precursor
mixing-direct
granulation.
The
effect
doping
on
properties
was
compared
using
Density
function
theory
(DFT)
calculations,
co-doping
showed
significant
charge
accumulation
with
a
low
ozonolysis
energy
barrier,
more
favorable
for
generation
reactive
oxygen
species.
successful
loading
main
active
components,
such
as
Mn,
Cu,
Ce,
clarified
systematic
characterization
X-ray
diffraction
(XRD),
photoelectron
spectroscopy
(XPS),
scanning
electron
microscopy
(SEM),
dispersive
(EDS)
Brunauer-Emmett-Teller's
test
(BET),
chemical
demand
(COD)
removal
could
reach
than
60%
simulated
wastewater.
paramagnetic
resonance
(EPR)
that
degradation
organic
pollutants
mainly
dominated
combination
single-linear
superoxide
radicals
catalytic
process,
possible
mechanism
proposed.
advances
non-homogeneous
technology.
Water,
Год журнала:
2025,
Номер
17(6), С. 856 - 856
Опубликована: Март 17, 2025
In
this
study,
we
studied
the
process
of
recovering
copper
from
mine-leached
water
at
an
altitude
4500
m.
The
was
ion
exchange–esolution–nanofiltration–separation–cyclone
electrodeposition.
As
a
result,
high-purity
cathodes
were
produced.
study
demonstrated
that
maximum
adsorption
capacity
exchange
resin
D402
for
Cu2+
reached
174.6
g/L
and
efficiency
eluent
found
to
be
97.2%
94.2%,
respectively.
results
Fourier
Transform
infrared
spectroscopy
(FTIR)
analysis
indicated
contains
-OH
-NH2.
lone
pair
electrons
on
O
N
atoms
can
form
coordination
bonds
with
ions
stable
complexes.
X-ray
photoelectron
(XPS)
absorbed
into
resin.
recovery
throughout
entire
reaches
95.1%,
purity
resulting
cathode
99.997%.
This
method
is
distinguished
by
straightforward
process,
minimal
environmental
impact,
optimal
operating
conditions,
high
efficiency,
grade.
Journal of Environmental Management,
Год журнала:
2025,
Номер
381, С. 125239 - 125239
Опубликована: Апрель 9, 2025
Phosphorus
is
essential
for
global
food
production,
but
intensive
agriculture
disrupts
its
natural
cycle,
increasing
reliance
on
non-renewable
sources.
A
sustainable
alternative
recovering
phosphorus
from
waste
streams
using
thermochemical
processes.
This
work
investigates
the
hydrothermal
treatment
of
sewage
sludge
digestate
to
explore
conversion
and
speciation,
aiming
optimize
solid
by-product
as
fertilizer.
Through
a
novel
integration
response
surface
methodology
process
severity
modeling,
study
examines
influence
parameters
(temperature,
time)
behavior.
digestate,
sampled
wastewater
plant,
was
treated
in
batch
reactor
at
temperatures
250
350
°C
5-45
min.
Products
were
centrifuged
into
pellet
water,
followed
by
characterization
their
physicochemical
properties.
Results
show
that
temperature
time
significantly
impact
characteristics
speciation.
Treatments
250-300
promote
organic
mineralization
increase
soluble
phosphate
concentration,
while
treatments
lead
greater
recovery
pellet,
mostly
calcium
phosphates.
research
provides
framework
recovery,
suggesting
hydrothermally
pellets
potential
slow-release
fertilizers.
Future
should
comprehensively
investigate
effect
addition
precipitation
