ACS ES&T Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 9, 2024
Phosphate
removal
plays
a
pivotal
role
in
alleviating
eutrophication
and
maintaining
water
quality.
Cerium
(Ce)
demonstrates
considerable
promise
phosphate
removal,
attributed
to
its
strong
affinity
for
ions.
This
study
provides
dual
utilization
strategy
synthesizing
Fe2O3-
CeCO3OH-decorated
hydrophilic
porous
biochar
(Fe/Ce@HPBC),
designed
recovery
from
eutrophic
waters
followed
by
application
as
slow-release
fertilizer.
Fe/Ce@HPBC
possessed
excellent
adsorption
quantity,
achieving
maximum
uptake
of
203.88
mg/g
accordance
with
the
Sips
model.
Furthermore,
experiment
demonstrated
that
used
fertilizer
after
could
sustainably
release
39.8%
content
within
28
days.
Fe/Ce@HPBC-P
also
significantly
increase
effective
phosphorus
soil
65.51%
promote
maize
seedlings
70.36%.
Mechanistic
investigation
revealed
outstanding
was
formation
inner-sphere
complexation
through
ligand
exchange
between
Ce(HCO3)2+/Ce–OH,
addition
electrostatic
attraction
caused
enhanced
surface
protonation.
Overall,
this
contributes
advancement
techniques
promotes
development
sustainable
agriculture
presenting
an
mitigating
eutrophication.
Carbon Research,
Journal Year:
2024,
Volume and Issue:
3(1)
Published: July 2, 2024
Abstract
The
application
of
hydrochar
as
a
cost-effective
solution
has
received
much
attention
for
the
remediation
contaminated
water.
An
economical
and
environmental
approach
to
enhancing
physicochemical
adsorption
performance
is
essential.
In
this
study,
green
technology
ball-milling
was
firstly
employed
improve
capacity
typical
antibiotics
norfloxacin.
Aqueous
batch
experiment
using
both
pristine
ball
milled
derived
from
water
hyacinth,
prepared
by
hydrothermal
carbonization
at
three
temperatures
(180,
200,
220
°C)
conducted.
results
showed
that
decreased
specific
surface
area
hydrochar,
but
still
greatly
enhanced
their
on
Surface
functional
groups,
aromatization
degree,
hydrophobicity
were
increased
after
ball-milling,
evidenced
measurements
Boehm
titration,
Raman
spectra,
contact
angle,
respectively.
With
these
changes,
all
ball-milled
hyacinth
exhibited
better
norfloxacin
than
hydrochar.
Ball-milled
°C
greatest
(68.53
mg
g
−1
)
compared
unmilled
(24.29
),
enhancement
effective
in
wide
pH
range
(5–9)
aqueous
solutions.
thermodynamics
study
indicated
physically
spontaneous
exothermic.
Combined
characterization
suggest
owing
boosting
H-bonds,
π-π
electron-donor–acceptor,
hydrophobic
interaction.
This
suggested
can
be
served
facile,
green,
method
obtain
modified
removal
pollutants
Biochar,
Journal Year:
2024,
Volume and Issue:
6(1)
Published: Oct. 18, 2024
Abstract
Wastewater
produced
in
beryllium
mining
seriously
affects
ecological
balance
and
causes
great
environmental
pressure.
We
designed
a
novel
porous
lotus
leaf
biochar
modified
with
PO
4
3−
/NH
+
multifunctional
groups
(MLLB)
used
it
for
beryllium(Be)
removal
from
wastewater.
Kinetic
thermodynamic
experiments
showed
that
the
adsorption
capacity
(Q
e
)
of
Be
MLLB
simulated
wastewater
could
reach
40.38
g
kg
−1
(35
°C,
pH
=
5.5),
process
was
spontaneous
endothermic.
The
dispersion
coefficient
K
d
2.6
×
10
mL
,
which
proved
had
strong
selective
Be.
Phosphoric
acid,
ammonia,
hydroxyl
on
surface
would
complex
to
form
Be(OH)
2
Be(NH
)PO
complexation
products,
implied
precipitation
reactions
might
co-existed
process.
above
results
effectively
adsorb
prevent
exposure
Graphical
Carbon Research,
Journal Year:
2025,
Volume and Issue:
4(1)
Published: Jan. 26, 2025
Abstract
To
effectively
remove
lead
(Pb(II))
and
bisphenol
A
(BPA)
from
wastewater,
polyvinyl
chloride
modified
magnetic
hydrochar
(PVC-AMHC)
was
synthesized
through
co-hydrothermal
carbonization
of
corn
straw,
subsequently
activated
using
NaOH.
Characterization
demonstrated
that
both
PVC
NaOH
activation
increased
the
content
oxygen-containing
functional
groups,
Fe
3
O
4
successfully
loaded
onto
material
surface.
Furthermore,
PVC-AMHC
displayed
remarkable
uptake
capacity
with
maximum
amount
Pb(II)
(217.53
mg/g)
BPA
(185.53
at
130
30
min,
respectively,
under
a
wide
pH
range.
Additionally,
possessed
high
tolerance
to
different
interference
cations
maintained
excellent
adsorption
performance
during
four
regeneration
cycles.
The
thermodynamic
analysis
suggested
absorption
processes
by
PVC-MHC
were
spontaneous
(-Δ
G
0
)
an
endothermic
characteristic
(+Δ
H
).
Adsorption
mechanisms
on
included
complexation,
electrostatic
attraction,
pore
filling,
those
mainly
associated
hydrogen
bonding
filling.
In
conclusion,
environmentally
friendly
adsorbent
simultaneous
removal
wastewater.
Graphical
