Phosphate
and
ammonia
nitrogen
as
important
sources
of
eutrophication
in
water
bodies,
their
removal
recovery
are
crucial
for
environmental
management.
In
this
study,
magnesium-modified
biochar
beads
(Ca/MgBC)
capable
adsorbing
both
PO3-4
NH+
4-N
were
prepared,
which
achieved
by
co-precipitating
Mg2+
onto
the
corn
stover
precursor
cross-linking
sodium
alginate
with
Ca2+
gel-calcination
method.
Compared
to
single
or
solution,
adsorption
capacity
was
increased
almost
twice
that
1.5
times
simultaneous
solution
at
pH=9.
The
results
characterization
analyses
revealed
struvite
crystallization
main
mechanism
synergistic
effect
besides,
ion
exchange,
surface
precipitation
electrostatic
attraction
also
other
mechanisms
adsorption.
NP-loaded
Ca/MgBC
has
a
better
slow-release
potential
N
P
under
neutral
condition,
adsorbed
saturated
still
had
good
effects
on
seven
common
soil
heavy
metals
(Cd,
Hg,
Cu,
Pb,
Cr,
Zn
Ni).
These
suggest
is
kind
promising
adsorbent
phosphate
offers
possibilities
fertilization
remediation.
Biochar,
Journal Year:
2023,
Volume and Issue:
5(1)
Published: Dec. 7, 2023
Abstract
In
this
study,
an
adsorbent
(LCB)
with
rich
honeycomb
structure
was
prepared
from
cork
waste
generated
furniture
factories
for
efficient
adsorption
of
excess
phosphorus
(P)
wastewater.
This
successfully
in
only
one
step,
situ
precipitation
method,
which
greatly
simplified
the
synthesis
process.
Kinetic
studies
showed
that
when
initial
concentration
(C
0
)
wastewater
10
mg
P
L
−1
,
water
could
be
completely
adsorbed
within
20
min.
The
efficiency
significantly
improved
compared
to
previous
studies.
When
C
pollutant
and
dosage
LCB
were
0.5
g
respectively,
removal
rate
exceeded
99%
pH
range
3–10,
indicates
wide
applicability
LCB.
addition,
capacity
82.4%
its
value
after
nine
adsorption–desorption
cycles,
indicating
has
a
high
stability
can
widely
used
different
environments.
Therefore,
is
promising
material
treatment
P-containing
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