Sustainability,
Journal Year:
2025,
Volume and Issue:
17(3), P. 1191 - 1191
Published: Feb. 1, 2025
Phosphorus
(P)
is
a
crucial
factor
influencing
both
plant
growth
and
the
enrichment
of
aquatic
environment.
Agriculture
primary
sector
economy
where
demand
for
phosphorus
highest.
Due
to
depletion
P,
more
attention
being
paid
possibility
recovering
reusing
P
through
idea
circular
(CE).
The
main
objective
this
study
was
compare
raw
eggshells
(R-ESs)
calcined
(C-ESs)
removal
from
wastewater
assess
possible
use
agro-waste
materials
according
CE
requirements
in
non-flow
conditions.
A
synthetic
indicator,
zeroed
unitarization
method,
calculated
evaluate
critical
aspects
CE.
sorption
R-ESs
C-ESs
equaled
0.90
1.66
mgP-PO4/g
an
initial
concentration
17.3
mgP-PO4/L.
were
characterized
by
almost
two
times
higher
reduction
rate
than
R-ESs.
indicator
0.89
0.72
C-ESs,
respectively.
This
means
that
are
sustainable
C-ESs.
Although
potentially
have
significant
environmental
impact,
it
worth
considering
method
elimination
beneficial
ecological
perspective.
Environmental Science and Pollution Research,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 28, 2025
Abstract
Phosphorus
is
essential
for
all
living
organisms
and
limits
aquatic
plant
growth.
Pulp
mill
effluents,
particularly
from
Eucalyptus
bleached
kraft
pulp
mills,
contain
phosphorus
concentrations
that
vary
with
operational
conditions.
This
variability
poses
challenges
effective
treatment
removal.
However,
uncontrolled
release
of
phosphorus-rich
wastewaters
causes
eutrophication.
study
focuses
on
optimizing
removal
such
effluents
using
cobalt
ferrite
nanoparticles,
an
emphasis
process
optimization
to
address
this
variability.
Minimizing
crucial
in
wastewater
engineering
surface
water
management.
By
employing
design
experiments
response
methodology,
we
aim
fine-tune
the
phosphorous
pinpoint
key
factors
most
significant
impact.
Optimal
conditions
achieving
over
90%
effluent
5
mg
P/L
were
identified
as
a
sorbent
dose
greater
than
1.3
g/L
pH
range
between
7,
within
contact
time
only
15
min.
For
1
24
h,
adjust
0.97
0.83
g/L,
respectively,
remaining
same.
Our
results
highlight
effectiveness
nanoparticles
sorbents
purposes.
approach
presents
sustainable
proficient
strategy
recovery
thereby
lessening
environmental
repercussions
offering
valuable
resource
future
use.
contributes
maintenance
quality
ecosystem
preservation.
Cleaner Chemical Engineering,
Journal Year:
2022,
Volume and Issue:
2, P. 100023 - 100023
Published: May 10, 2022
Contamination
of
water
with
metallic
ions
and
dyes
leads
to
several
impacts
on
the
environment
human
health.
The
adsorption
comes
as
an
economic
simple
process
remove
these
pollutants
from
water.
use
residues
adsorbents
can
make
even
more
sustainable
cheaper.
This
work
proposes
a
solid
residue
(eggshells)
adsorbent
-
Reactive
Blue
198
(RB)
Direct
Black
22
(DB)
(Cd2+
Cr3+).
was
characterized
by
SEM,
EDS,
FTIR,
BET
pH-PZC;
investigated
for
dosage,
kinetic
isotherm
analysis.
quantifications
were
determined
UV-VIS
spectroscopy
atomic
absorption
spectroscopy,
respectively.
eggshells
presented
porous
structure,
surface
area
435
cm2.g−1,
composed
mainly
CaCO3
neutral
charge
at
pH
7.
It
verified
that
phenomenon
occurs
chemical
interactions
between
adsorbates,
having
external
transport
limit
step.
Regarding
models,
fit
Langmuir
model
Dubinin-Radushkevich
model.
1.0
g
sufficient
adsorb
96
%
RB;
97
BD;
99
Cd2+;
95
Cr3+.
Thus,
analyzed
in
this
research
shows
be
promising
alternative
removing
while
giving
residue.
Revista de Gestão Social e Ambiental,
Journal Year:
2025,
Volume and Issue:
19(2), P. e011187 - e011187
Published: Feb. 10, 2025
Objective:
This
study
aimed
to
evaluate
phosphorus
removal
in
fixed-bed
columns
using
Lithothamnium
calcareum,
a
calcareous
algae
widely
used
the
agricultural
sector,
exploring
its
potential
as
sorbent
medium
wastewater
treatment.
Theoretical
Framework:
The
research
was
based
on
established
kinetic
and
equilibrium
models
for
describing
pollutant
removal.
pseudo-second-order
model
employed
kinetics,
while
Temkin
describe
equilibrium,
providing
consistent
theoretical
support
data
analysis.
Methodology:
Initially,
parameters
were
determined
from
synthetic
solutions.
Subsequently,
continuous
tests
conducted
effluents
treatment
plant
located
Rio
de
Janeiro,
Brazil.
Operational
parameters,
such
flow
rate,
bed
height,
initial
concentration,
adjusted
process
efficiency.
Yoon-Nelson
applied
operational
behavior.
Results
Discussion:
Phosphorus
highly
efficient,
with
rates
ranging
84%
98%.
kinetics
followed
model,
aligned
model.
demonstrated
good
compatibility
under
varied
experimental
conditions.
Research
Implications:
application
of
calcareum
represents
sustainable
effective
alternative
removal,
particularly
plants,
promoting
greater
environmental
sustainability.
Originality/Value:
highlights
innovation
systems,
reinforcing
feasibility
practical
solution
RSC Sustainability,
Journal Year:
2024,
Volume and Issue:
2(5), P. 1498 - 1507
Published: Jan. 1, 2024
In
this
study,
granular
adsorbents
containing
varying
ratios
of
torrefied
wheat
straw
(TWS),
eggshells
(ES),
and
chitosan
(Chi)
were
prepared,
which
are
referred
to
as
ternary
composites
(TWCs).
