Chemosphere,
Journal Year:
2024,
Volume and Issue:
368, P. 143801 - 143801
Published: Nov. 1, 2024
Due
to
environmental
concerns
and
economic
value,
the
adsorption
process
using
agricultural
wastes
is
one
of
promising
methods
remove
lead
(Pb)
from
contaminated
water.
The
relationships
between
waste
properties,
conditions,
maximum
Pb
capacity
selected
adsorbents
have
not
been
adequately
explored.
A
thorough
understanding
these
interactions
crucial
for
optimizing
processes
enhancing
efficiency
as
sustainable
adsorbents.
To
assess
by
identify
key
influencing
factors,
three
artificial
intelligence
techniques,
namely
Extreme
Learning
Machine
(ELM),
Adaptive
Nuro-Fuzzy
Inference
Systems
(ANFIS),
Group
Method
Data
Handling
(GMDH)
employed
in
this
study.
Seven
input
variables,
time,
ratio,
initial
ion
concentration,
type
wastes,
pH,
temperature,
agitation
speed,
771
data
points
were
used
inputs
model
development,
while
quantity
adsorbed
was
chosen
target
parameter.
best
combinations
with
seven
127
models
defined
analyzed
ELM
integrated
cross-validation
technique.
results
highlighted
that
concentration
most
critical
factor
heavy
metal
adsorption,
temperature
least
important
factor.
top
models,
utilizing
variable(s),
then
modeled
ANFIS
GMDH.
Subsequently,
all
compared.
GMDH
four
variables
(initial
adsorbent,
speed)
demonstrated
highest
performance
terms
accuracy
simplicity.
Environmental Technology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 14
Published: March 27, 2025
Sediment
is
a
critical
component
of
aquatic
ecosystems,
that
acts
as
natural
sink
for
diverse
pollutants
such
heavy
metals
and
phosphorus
(P).
However,
the
current
research
on
sediment
remediation
has
predominantly
focused
single
contaminants.
In
this
study,
novel
composite
material,
calcium
peroxide/lanthanum-loaded
hydrochar
(CaO2–LaHyd),
was
synthesised
through
hydrothermal
carbonisation
water
purification
sludge,
followed
by
sequential
loading
lanthanum
ions
nano-calcium
peroxide.
The
adsorption
capacities
CaO2–LaHyd
P
Pb
were
evaluated
via
experiments,
their
passivation
mechanisms
investigated
capping
simulations.
Materials
characterised
using
scanning
electron
microscopy,
X-ray
photoelectron
spectroscopy,
diffraction,
energy-dispersive
spectroscopy.
Results
indicated
exhibited
maximum
66.05
mg·g⁻¹
230.41
Pb.
simulated
addition
5%
significantly
reduced
phosphate
concentrations
in
overlying
water.
slow
release
oxygen
from
peroxide
improves
redox
conditions,
suppresses
endogenous
release,
decreases
interstitial
levels.
Speciation
analysis
revealed
promoted
transformation
into
stable
forms
while
reducing
bioavailable
fractions.
Concurrently,
it
enhanced
passivation,
thereby
mitigating
leaching
risks
sediment.
Sustainability,
Journal Year:
2025,
Volume and Issue:
17(8), P. 3322 - 3322
Published: April 8, 2025
The
efficient
removal
of
pharmaceuticals
and
personal
care
products
(PPCPs)
from
aqueous
solutions
using
conventional
adsorbents
is
hindered
by
low
adsorption
capacity,
insufficient
selectivity,
poor
regeneration
performance,
limited
stability.
In
this
study,
a
multilayer
β-CD/GO
membrane
was
successfully
prepared
via
layer-by-layer
coating
with
β-cyclodextrin
(β-CD)
graphene
oxide
(GO).
combines
the
host–guest
complexation
ability
β-CD
abundant
oxygen-containing
functional
groups
GO
to
enhance
targeted
PPCPs
(CTD,
SMZ,
DCF)
solutions.
adsorbent
overcomes
separation
difficulties
performance
powdered
adsorbents,
structure
can
significantly
structural
stability
increase
number
sites.
Batch
experiments
showed
that
optimal
for
occurred
at
pH
4
in
absence
coexisting
ions.
With
increasing
values
range
4–9,
capacities
CTD,
DCF
slightly
decreased
14.37,
13.69,
13.01
mg/g,
respectively,
slowly
4.88,
3.51,
3.26
mg/g
as
ion
concentrations
increased
0
0.20
mol/L.
mechanism
systematically
investigated
through
kinetics,
isotherms,
thermodynamics.
processes
were
well
described
both
pseudo-first-order
pseudo-second-order
kinetic
models
(R2
>
0.984),
suggesting
hybrid
involving
physisorption
chemisorption.
isotherm
results
indicated
CTD
followed
Langmuir
model
=
0.923),
whereas
SMZ
better
Freundlich
0.984–0.988).
exhibited
high
maximum
35.56,
43.29,
39.49
respectively.
Thermodynamic
analyses
exothermic
(ΔH0
−86.16
−218.49
J/mol/K)
non-spontaneous
(ΔG0
9.84–11.56,
9.50–12.54,
10.09–14.46
kJ/mol).
maintained
efficiency
over
58.45–71.73%
after
five
consecutive
cycles,
demonstrating
reusability
practical
applications.
mechanisms
include
electrostatic
interactions,
hydrogen
bonding,
hydrophobic
π-π
EDA
interactions.
This
study
offers
promising
environmentally
friendly
