Desalination and Water Treatment,
Journal Year:
2023,
Volume and Issue:
316, P. 290 - 298
Published: Dec. 1, 2023
p-nitrophenol
(4-NP)
is
a
common
raw
material
in
the
industrial
production
of
many
valuable
substances.With
rapid
development
chemical
industry,
4-NP
has
increased
substantially.However,
due
to
its
characteristic
toxicity,
inevitably
causes
pollution
environment
during
synthesis
and
usage.In
this
paper,
sodium
borohydride
(NaBH
4
)
ferric
chloride
(FeCl
3
•6H
2
O)
were
used
as
materials
prepare
iron
nanoparticles
by
liquid
phase
reduction
technique,
their
performance
pollutant
degradation
was
investigated.The
experimental
results
showed
that
presented
excellent
for
4-NP.When
concentration
15
mg/L,
only
0.25
g/L
degraded
more
than
74%
1
h.
Fullerenes Nanotubes and Carbon Nanostructures,
Journal Year:
2024,
Volume and Issue:
32(6), P. 509 - 521
Published: Jan. 17, 2024
Lead
is
a
heavy
metal
that
affects
all
systems
of
the
human
body.
An
adsorption
method
was
used
for
removal
lead
from
wastewater.
For
this
purpose,
two
adsorbents,
graphene
oxide
coated
sand
particles
(GOSC)
and
iron
(GCIO)
were
prepared
by
coating
sheets
on
surfaces
using
sucrose
solution
under
controlled
heating
program.
Both
adsorbents
offered
very
fast
Pb+2
ions
with
small
amount
GOSC
GCIO,
respectively.
Characterization
done
several
advanced
techniques
like
FTIR,
XRD,
SEM,
EDX
TEM
before
after
(Pb2+).
Various
parameters
such
as
effect
time,
pH,
adsorbent,
dose
effect,
concentration
temperature
studied
both
adsorbents.
kinetic
models
also
examined
data
results
showed
(Pb2+)
through
follow
Langmuir
isotherm
(R2
=
99%),
second
order
kinetics
98%)
higher
intraparticle
diffusion
98%),
respectively
while
in
case
GCIO
follows
Freundlich
model
98%).
Desalination and Water Treatment,
Journal Year:
2023,
Volume and Issue:
316, P. 383 - 394
Published: Dec. 1, 2023
Polyacrylic
acid/sodium
alginate-based
titanium
dioxide
(PAA/SA@TiO
2
)
composite
hydrogel
has
the
good
nitrogen
removal
properties
in
nitrogen-containing
wastewaters.Under
optimal
adsorption
conditions,
which
include
pH
7,
temperature
35°C,
adsorbent
dosage
6
g/L,
equilibrium
time
70
min,
efficiency
is
85.56%,
79.46%,
and
67.63%
when
initial
ammonia
concentrations
of
100,
200,
300
mg/L,
respectively,
indicating
that
performance
for
nitrogen.The
process
conforms
to
monolayer
Langmuir
model,
kinetic
belongs
pseudo-second-order
model
chemical
adsorption.The
structure
PAA/SA@TiO
stable.The
thermogravimetric
analysis
revealed
its
main
chain
began
break
degrade
only
at
446°C
with
thermally
decomposed
hydroxyl
carboxyl
groups.At
800°C,
thermal
loss
rate
was
48%.After
5
cycles
regeneration,
drops
by
about
10%.The
research
results
showed
PAA/
SA@TiO
had
great
application
prospects
field
wastewater
treatment,
provided
theoretical
basis
operating
parameters
applying
wastewaters
treatment.
Environmental Technology,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 12
Published: April 7, 2024
Magnetic
Fe3O4
nanoparticles
were
added
into
the
aqueous
phase
to
form
nanofluid
systems,
in
which
ozone
was
used
for
oxidation
of
tetracycline
hydrochloride
(TC)
solution.
The
nanomaterials
characterized
using
SEM,
XRD,
EDS,
and
FT-IR.
effects
size,
addition
ratio,
number
cycles
on
process
TC
investigated.
results
indicated
that
ratio
have
a
certain
impact
performance
oxidation.
When
increased
from
0.02%
0.4%,
removal
rate
solution
improved
significantly.
Besides,
particle
size
showed
greater
At
nanoscale,
exhibited
significant
strengthening
properties,
is
attributed
construction
systems.
decreased
obviously
with
increase
size.
20
nm
most
effect
degradation.
recycling
experiment
magnetic
had
stable
regeneration
performance.
For
three
times
treatment,
reached
98.7%,
97.21%,
96%,
respectively.
Based
characterization
results,
mechanism
analyzed.
experimental
nanofluids
systems
could
improve
utilization
ozone,
reusable
easily
recyclable.
Metals,
Journal Year:
2023,
Volume and Issue:
13(10), P. 1643 - 1643
Published: Sept. 25, 2023
As
a
metallurgical
and
chemical
raw
material,
electrolytic
manganese
is
an
important
strategic
resource.
However,
with
the
rapid
development
of
industry,
correct
disposal
anode
slime
has
become
serious
problem.
The
purpose
this
experiment
was
to
reduce
occupation
land
resources
by
lead–containing
waste
residue
manganese,
pollution
caused
environment
provide
reference
for
research
on
treatment
technology
resource
utilization
in
China.
In
experiment,
special
process
studied
composition
characteristics
residues
produced
manganese.
acid
leaching–enrichment–membrane
electrolysis
used
recover
lead
acid,
so
as
maximize
resources.
pretreated
leached,
enriched
concentrated,
then
Pb2+
solution
cathode
dilute
nitric
membrane
electrolysis.
uses
plate
cathode,
selects
best
anion
exchange
anodic
takes
recovery,
current
efficiency,
voltage
power
consumption
investigation
indexes
explore
analyze
influence
many
factors
such
concentration
density
determine
parameters.
optimum
parameters
recovery
were
determined
follows:
40
g/L,
30
mA/cm2,
reaction
temperature
60
°C,
cathodic
pH
value
4.0,
HNO3
0.5
mol/L,
ammonium
nitrate
50
g/L.
Under
optimal
conditions,
efficiency
85.6%,
73.03%,
99.2%,
3.8
V,
1148.4
kW·h·t−1.
Through
three
steps
electrolysis,
78.53%
original
can
be
recovered
form
metal
element,
chamber
also
again
leaching
process,
which
not
only
solve
problem
environmental
but
achieve
resources,
good
social
economic
benefits.
Desalination and Water Treatment,
Journal Year:
2023,
Volume and Issue:
316, P. 290 - 298
Published: Dec. 1, 2023
p-nitrophenol
(4-NP)
is
a
common
raw
material
in
the
industrial
production
of
many
valuable
substances.With
rapid
development
chemical
industry,
4-NP
has
increased
substantially.However,
due
to
its
characteristic
toxicity,
inevitably
causes
pollution
environment
during
synthesis
and
usage.In
this
paper,
sodium
borohydride
(NaBH
4
)
ferric
chloride
(FeCl
3
•6H
2
O)
were
used
as
materials
prepare
iron
nanoparticles
by
liquid
phase
reduction
technique,
their
performance
pollutant
degradation
was
investigated.The
experimental
results
showed
that
presented
excellent
for
4-NP.When
concentration
15
mg/L,
only
0.25
g/L
degraded
more
than
74%
1
h.
