Synthesis of iron-modified montmorillonite/Al2O3 composite adsorbents and their phosphorus adsorption performance study
Research Square (Research Square),
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 25, 2025
Abstract
The
presence
of
excessive
phosphate
in
aquatic
systems
can
trigger
eutrophication
processes,
causing
detrimental
impacts
on
ecological
balance.
This
research
developed
an
innovative
phosphorus-adsorbing
composite
material
through
iron-modified
montmorillonite
integrated
with
Al
2O
3,
synthesized
via
surface
modification
coupled
hydrothermal
calcination
(Fe/AlPMt),
for
phosphorus
management.
pH
optimization
experiments
demonstrated
Fe/AlPMt's
effective
removal
capability
across
extended
acidic
range
(pH
3.0–6.0).
displayed
superior
selectivity
compared
to
competing
anions.
Kinetic
analysis
revealed
that
the
adsorption
process
conformed
a
second-order
reaction
model,
particle
internal
diffusion
identified
as
dominant
mechanism.
Equilibrium
studies
indicated
satisfactory
alignment
both
Freundlich
and
Tempkin
isotherm
models
adsorption.
Field
testing
lake
water
achieved
remarkable
99%
elimination
at
0.3
g/L
dosage.
Adsorption
mechanisms
involved
multiple
pathways:
electrostatic
attraction,
ligand
substitution
reactions,
precipitate
formation
surfaces.
maintained
95.8%
efficiency
after
five
regeneration
cycles,
demonstrating
robust
recyclability.
These
results
position
Fe/AlPMt
viable
solution
phosphorus-contaminated
wastewater
remediation.
Язык: Английский
Enhanced scavenging and recovery of low-concentration phosphate from secondary effluents using lanthanum-incorporated layered double hydroxide composites
Process Safety and Environmental Protection,
Год журнала:
2025,
Номер
unknown, С. 107224 - 107224
Опубликована: Апрель 1, 2025
Язык: Английский