Molecules,
Journal Year:
2024,
Volume and Issue:
29(11), P. 2665 - 2665
Published: June 4, 2024
The
discharge
of
lead
and
cadmium
wastewater,
along
with
the
pollution
caused
by
phosphogypsum,
represents
a
particularly
urgent
environmental
issue.
This
study
employed
straightforward
hydrothermal
method
to
convert
phosphogypsum
into
porous
calcium
silicate
hydrate
(P-CSH),
which
was
then
used
remove
recover
Pb(II)
Cd(II)
from
wastewater.
adsorption
capacities
P-CSH
for
were
notably
high
at
989.3
mg/g
290.3
mg/g,
respectively.
processes
adhered
pseudo-second-order
kinetics
model
Langmuir
isotherm
model.
Due
identical
sites
on
both
Cd(II),
competitive
interaction
occurred
when
ions
present
simultaneously.
Additionally,
efficacy
minimally
impacted
presence
common
coexisting
cations
in
dominant
mechanisms
removing
via
chemical
precipitation
surface
complexation.
Moreover,
adsorbed
heavy
metals
efficiently
separated
reclaimed
wastewater
through
stepwise
desorption
process.
primary
components
residue
quartz
amorphous
SiO2.
Following
dissolution
pressurized
alkaline
leaching,
this
could
be
recycled
synthesizing
P-CSH.
research
offered
new
strategy
resourceful
use
metal
Arabian Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
17(5), P. 105756 - 105756
Published: March 26, 2024
KMnO4-modified
biochar
(KM/biochar)
derived
from
cotton
stem
is
prepared
with
different
stem/KMnO4
ratios
for
Pb(II)
removal
wastewater.
The
characterization
analysis
indicates
that
KM/biochar
has
abundant
surface
functional
groups
and
large
area,
contributing
to
removal.
adsorption
on
can
be
accurately
analyzed
using
the
Pseudo-second
order
Hill
model.
maximum
capacity
of
144.49
mg/g
at
pH
5.
spontaneous
based
thermodynamics
enthalpy
value
8.54
kJ/mol.
Coexisted
ions
such
as
Na+,
K+,
Ca2+
Mg2+
have
slightly
influenced
process.
regeneration
experiment
shows
excellent
after
three
cycles.
existence
CO2
contribute
mechanism
includes
precipitation,
cation
exchange,
electrostatic
attraction
π-π
interaction.
These
above
results
indicate
waste
converted
into
high-efficient
Molecules,
Journal Year:
2024,
Volume and Issue:
29(11), P. 2665 - 2665
Published: June 4, 2024
The
discharge
of
lead
and
cadmium
wastewater,
along
with
the
pollution
caused
by
phosphogypsum,
represents
a
particularly
urgent
environmental
issue.
This
study
employed
straightforward
hydrothermal
method
to
convert
phosphogypsum
into
porous
calcium
silicate
hydrate
(P-CSH),
which
was
then
used
remove
recover
Pb(II)
Cd(II)
from
wastewater.
adsorption
capacities
P-CSH
for
were
notably
high
at
989.3
mg/g
290.3
mg/g,
respectively.
processes
adhered
pseudo-second-order
kinetics
model
Langmuir
isotherm
model.
Due
identical
sites
on
both
Cd(II),
competitive
interaction
occurred
when
ions
present
simultaneously.
Additionally,
efficacy
minimally
impacted
presence
common
coexisting
cations
in
dominant
mechanisms
removing
via
chemical
precipitation
surface
complexation.
Moreover,
adsorbed
heavy
metals
efficiently
separated
reclaimed
wastewater
through
stepwise
desorption
process.
primary
components
residue
quartz
amorphous
SiO2.
Following
dissolution
pressurized
alkaline
leaching,
this
could
be
recycled
synthesizing
P-CSH.
research
offered
new
strategy
resourceful
use
metal
