Materials,
Journal Year:
2023,
Volume and Issue:
16(17), P. 5864 - 5864
Published: Aug. 27, 2023
Rapid
technological,
industrial
and
agricultural
development
has
resulted
in
the
release
of
large
volumes
pollutants,
including
metal
ions,
into
environment.
Heavy
metals
have
become
great
concern
due
to
their
toxicity,
persistence,
adverse
effects
caused
environment
population.
In
this
regard,
municipal
effluents
should
be
thoroughly
treated
before
being
discharged
natural
water
or
used
for
irrigation.
The
physical,
chemical,
biological
techniques
applied
wastewater
treatment
adsorption
a
special
place
enabling
effective
pollutant
removal.
Currently,
plenty
adsorbents
different
origins
are
metal-containing
aqueous
solution
wastewater.
present
review
is
focused
on
mesoporous
materials.
particular,
recent
achievements
materials’
synthesis
application
discussed.
mechanisms
onto
materials
highlighted
examples
multiple
uses
removal
presented.
information
contained
can
by
researchers
environmental
engineers
involved
new
improvement
technologies.
RSC Advances,
Journal Year:
2023,
Volume and Issue:
13(26), P. 17595 - 17610
Published: Jan. 1, 2023
Heavy
metal
contamination
of
water
sources
has
emerged
as
a
major
global
environmental
concern,
threatening
both
aquatic
ecosystems
and
human
health.
pollution
in
the
environment
is
on
rise
due
to
industrialization,
climate
change,
urbanization.
Sources
include
mining
waste,
landfill
leachates,
municipal
industrial
wastewater,
urban
runoff,
natural
phenomena
such
volcanic
eruptions,
weathering,
rock
abrasion.
ions
are
toxic,
potentially
carcinogenic,
can
bioaccumulate
biological
systems.
metals
cause
harm
various
organs,
including
neurological
system,
liver,
lungs,
kidneys,
stomach,
skin,
reproductive
systems,
even
at
low
exposure
levels.
Efforts
find
efficient
methods
remove
heavy
from
wastewater
have
increased
recent
years.
Although
some
approaches
effectively
contaminants,
their
high
preparation
usage
costs
may
limit
practical
applications.
Many
review
articles
been
published
toxicity
treatment
for
removing
wastewater.
This
focuses
main
pollution,
chemical
transformation,
toxicological
impacts
environment,
harmful
effects
ecosystem.
It
also
examines
advances
cost-effective
techniques
physicochemical
adsorption
using
biochar
zeolite
ion
exchangers,
well
decomposition
complexes
through
advanced
oxidation
processes
(AOPs).
Finally,
advantages,
applications,
future
potential
these
discussed,
along
with
any
challenges
limitations
that
must
be
considered.
Environmental Monitoring and Assessment,
Journal Year:
2024,
Volume and Issue:
196(5)
Published: April 4, 2024
Carbonaceous
materials
produced
from
agricultural
waste
(palm
kernel
shell)
by
pyrolysis
can
be
a
proper
type
of
low-cost
adsorbent
for
wide
uses
in
radioactive
effluent
treatment.
In
this
context,
the
as-produced
bio-char
(labeled
as
PBC)
and
its
sub-driven
sulfuric
acid
zinc
oxide
activated
carbons
PBC-SA,
PBC-Zn
respectively)
were
employed
adsorbents
uranium
sorption
aqueous
solution.
Various
analytical
techniques,
including
SEM
(Scanning
Electron
Microscopy),
EXD
(X-ray
Diffraction),
BET
(Brunauer-Emmett-Teller),
FTIR
(Fourier
Transform
Infrared
Spectroscopy),
Zeta
potential,
provide
insights
into
material
characteristics.
Kinetic
isotherm
investigations
illuminated
that
process
using
three
sorbents
is
nicely
fitted
with
Pseudo-second-order-kinetic
Langmuir
models.
The
picked
data
display
equilibrium
time
was
60
min,
maximum
capacity
9.89,
16.8,
21.9
mg/g
PBC,
respectively,
which
reflects
highest
affinity
oxide,
bio-char,
among
adsorbents,
taking
out
wastewater.
Sorption
thermodynamics
declare
U(VI)
an
exothermic,
spontaneous,
feasible
process.
About
92%
uranium-loaded
sorbent
eluted
1.0
M
CH
npj Clean Water,
Journal Year:
2024,
Volume and Issue:
7(1)
Published: June 15, 2024
Abstract
In
the
path
of
walking
on
road
sustainable
and
eco-friendly
production
methods
for
manufacturing
nanomaterials
utilizing
them
in
environmental
applications,
this
article
deals
with
prosperous
synthesis
a
biogenic
cyclam-functionalized
homologous
SBA-15
(BCFH-SBA-15).
For
purpose,
agricultural
waste
extensively
consumed
sorghum
was
used
as
rich
source
silica
preparation
BCFH-SBA-15
bimodal
micro-mesoporous
architecture
substantial
surface
area
325
m
2
g
–1
through
simple
one-pot
environmentally
friendly
approach.
The
material
structurally
characterized
use
different
instrumental
analyses
such
XRD,
FTIR,
FESEM,
TEM,
nitrogen
adsorption/desorption
isotherms.
proved
to
be
highly
efficient
adsorbing
Ni(II)
aqueous
solutions,
confirmed
by
most
reliable
classical
models
utilized
determining
isotherm,
thermodynamic,
kinetic
adsorption
parameters.
Langmuir
isotherm
model
provided
accurate
representation
experimental
results,
it
calculate
maximum
capacity
under
optimal
conditions
(pH
=
6.0,
adsorbent
dose
3.00
mg,
contact
time
20
min).
at
four
temperatures
298,
303,
308,
313
K
estimated
243.36,
253.87,
260.95,
266.28
mg
,
respectively;
surpassing
previously
reported
adsorbents
adsorption.
thermodynamic
data
indicated
strong
chemisorption
(
$${\triangle
H}_{{\rm{ads}}.}^{\circ
}$$
△Hads.∘
+122.61
kJ
mol
)
spontaneous
process
G}_{{\rm{ads}}.}^{\circ
G
.
−29.161
−36.801
low
degree
randomness
S}_{{\rm{ads}}.}^{\circ
S
0.5093
).
International Journal of Molecular Sciences,
Journal Year:
2025,
Volume and Issue:
26(6), P. 2639 - 2639
Published: March 14, 2025
This
study
investigates
the
simultaneous
adsorption
of
Pb(II),
Cu(II),
Cd(II),
and
Zn(II)
ions
from
aqueous
solutions
using
Urtica
dioica
leaves
(UDLs)
modified
with
sulfuric
acid,
followed
by
heat
treatment
to
enhance
adsorptive
properties.
The
significantly
increased
adsorbent’s
specific
surface
area
451.93
m2·g−1.
Batch
experiments
were
performed
determine
influence
contact
time,
pH
solution,
adsorbent
dosage,
temperature,
initial
metal
concentration
on
efficiency.
material
(modified
UDLs)
was
characterized
X-ray
diffraction
(XRD),
Fourier
transform
infrared
spectroscopy
(FT-IR),
scanning
electron
microscope
(SEM),
photoelectron
(XPS).
Maximum
removal
efficiencies
determined
as
99.2%,
96.4%,
88.7%,
83.6%
for
ions,
respectively.
Adsorption
isotherms
kinetics
revealed
that
process
follows
Langmuir
equation
pseudo-second-order
models,
indicating
monolayer
chemisorption
mechanisms.
Furthermore,
thermodynamic
analysis
indicated
processes
are
spontaneous
endothermic
in
nature.
competing
multiple
heavy
metals
also
discussed.
results
suggest
acid
heat-treated
can
offer
a
promising,
low-cost,
eco-friendly
removing
contaminated
water.
Discover Water,
Journal Year:
2024,
Volume and Issue:
4(1)
Published: June 11, 2024
Abstract
Bioadsorption
using
agricultural
waste
offers
a
promising
approach
for
removing
toxic
metals
from
wastewater.
This
study
explores
the
potential
of
chemically
activated
banana
peels
(BPs)
as
green
and
cost-effective
bioadsorbent
Cu(II)
Zn(II)
removal.
Fourier-transform
infrared
(FTIR)
spectroscopy
revealed
presence
functional
groups
like
alcohols,
phenols,
amino
acids
on
BPs,
potentially
responsible
metal
ion
binding.
Scanning
electron
microscopy
(SEM)
with
energy-dispersive
X-ray
(EDS)
confirmed
cavities
BPs
surface
existence
oxygen
potassium.
The
adsorption
capacity
was
investigated
under
various
conditions,
including
pH,
contact
time,
sorbent
dosage,
concentration,
temperature.
used
Langmuir,
Freundlich,
Tempkin,
Dubinin–Radushkevich
(D–R)
isotherm
models
to
describe
equilibrium
results
Cu
(II)
Zn
adsorption.
Langmuir
model
best
described
process,
suggesting
monolayer
coverage
ions
surface.
Maximum
capacities
were
3.2
mg
g
−1
2.8
Zn(II),
demonstrating
effectiveness
in
Kinetic
studies
indicated
pseudo-first-order
(PFO)
behavior
pseudo-second-order
(PSO)
Thermodynamic
analysis
spontaneous
exothermic
process
(negative
Gibbes
free
energy
(ΔG°)
enthalpy
(ΔH°)
decreased
randomness
[negative
entropy
(ΔS°)]
at
biosorption
interface.
Finally,
successfully
applied
remove
different
real
wastewater
samples
collected
El
Wadi
drain.
