Industrial & Engineering Chemistry Research,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 2, 2025
Plastic
waste,
a
significant
environmental
challenge
due
to
its
nonbiodegradability,
is
being
transformed
as
valuable
solution
for
water
treatment
while
promoting
circular
economy.
In
this
study,
polyurethane
extracted
from
plastic
waste
(code
7)
was
used
fabricate
polymeric
adsorbents
(PWPA)
and
silica-modified
(Si-PWPA)
through
single-step
process
using
toluene
solvent.
These
were
adsorb
As(III)
ions
contaminated
water.
The
characterized
HRMS,
FTIR,
SEM-EDX,
XRD
techniques,
atomic
absorption
spectroscopy
(AAS)
measured
the
AS(III)
concentrations.
HRMS
confirmed
successful
extraction,
characterization
revealed
porous
structures
conducive
enhanced
adsorption.
Density
functional
theory
(DFT)
provided
insights
into
adsorbents'
geometrical
energetic
molecular
properties.
maximum
adsorption
capacities
PWPA
Si-PWPA
107.52
166.66
mg/g,
with
67%
98.78%
removal
efficiencies,
respectively,
at
pH
7
over
90
min.
results
demonstrate
that
derived
offer
cost-effective
efficient
method
arsenic
removal,
providing
dual
pollution
recycling.
Geosystems and Geoenvironment,
Год журнала:
2023,
Номер
2(4), С. 100210 - 100210
Опубликована: Май 20, 2023
Different
natural
and
anthropogenic
processes
cause
pollution
of
various
water
bodies
worldwide
creating
numerous
health
problems
for
humans.
This
causes
serious
concern
as
is
a
basic
necessity
to
all
living
beings,
needs
be
adequately
monitored
managed
prevent
its
contamination.
If
found
contaminated,
the
cleaned
using
suitable
treatment
methods
keeping
in
view
WHO
regulations
before
it
intended
purpose
(drinking,
irrigation,
etc.).
Application
different
ICP-MS
techniques
such
classical
ICP-MS,
ICP-MS/MS,
ICP-TOF-MS,
HR-ICP-MS,
MH-ICP-MS,
MC-ICP-MS
qualitative
quantitative
determination
toxic
metals,
isotopes
and,
metal
species,
effective
monitoring
other
pollutants
drinking
water,
surface
groundwater,
industrial
effluents,
used
aquaculture
industries
focal
point
this
article.
In
general,
concentrations
major,
minor,
trace
element
composition
samples
are
influenced
mainly
by
bedrock
geology
emergence,
well
residence
time
depth
aquifer.
For
better
management
resources,
necessary
have
comprehensive
understanding
quality
(with
respect
physical,
chemical,
biological)
requirements,
sustainability
groundwater
from
particular
source.
Identifying
sources
contamination,
risks
associated,
application
technique(s)
supplied
public
consumption.
It
also
intensify
our
studies
on
species
(e.g.,
As3+,
Cr6+
methyl
mercury)
their
effects
human
health,
regulatory
limits
water.
Organic
dye
contamination
of
water
is
a
contributing
factor
to
environmental
pollution
and
has
negative
impact
on
aquatic
ecology.
In
this
study,
unsupported
NiO
kaolin-supported
composites
were
synthesized
by
one-step
wet
impregnation–precipitation
method
through
the
precipitation
nickel
hydroxide
onto
locally
accessible,
inexpensive,
easily
treated
kaolin
surfaces
using
sodium
as
precipitating
agent.
The
product
was
calcined
at
500
°C
used
for
catalytic
oxidative
degradation
methylene
blue
(MB)
in
an
aqueous
solution.
morphology,
structure,
interactions
materials
explored
SEM,
XRD,
FT-IR
spectroscopy.
characterization
results
revealed
fabrication
growth
surface.
To
determine
performance
catalyst,
many
experiments
have
been
performed
MB
model
dye.
tests
confirmed
importance
high
activity
NiO/kaolin
composite
toward
degradation.
showed
that
optimized
precursor
amount
surface
could
efficiently
enhance
removal
kinetic
investigation
fitted
pseudo-first-order
model.
High
efficiency
observed
after
eight
reuse
cycles,
proving
exceptional
stability
reusability
composite.
process
also
proceeded
with
low
activation
energy
30.5
kJ/mol.
conclusion,
established
be
favorable
catalyst
degrade
from
solution
presence
inexpensive
available
NaOCl
material
higher
than
99%
20.3
mg
within
6
min
apparent
rate
constant,
kapp,
0.44625
min–1,
which
far
better
kapp
0.0926
min–1
10
dose
20
min.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Март 23, 2024
Abstract
In
this
study,
a
CoO–Fe
2
O
3
/SiO
/TiO
(CIST)
nanocomposite
was
synthesized
and
utilized
as
an
adsorbent
to
remove
methylene
blue
(MB),
malachite
green
(MG),
copper
(Cu)
from
aqueous
environments.
The
characterized
using
field
emission
scanning
electron
microscopy
(FE-SEM),
Fourier-transform
infrared
spectroscopy
(FTIR),
thermogravimetric
analysis
(TGA),
X-ray
diffraction
(XRD).
Input
parameters
included
pH
(3–10),
contact
time
(10–30
min),
amount
(0.01–0.03
g),
pollutant
concentration
(20–60
mg
L
−1
).
effects
of
these
on
the
removal
process
efficiency
were
modeled
optimized
response
surface
methodology
(RSM)
based
Box–Behnken
design
(BBD).
RSM-BBD
method
demonstrated
capability
develop
second-degree
polynomial
model
with
high
validity
(R
˃
0.99)
for
process.
optimization
results
revealed
98.01%,
93.06%,
88.26%
MB,
MG,
Cu,
respectively,
under
optimal
conditions.
These
conditions
6,
10
min,
0.025
g,
20
.
recovered
through
five
consecutive
adsorption–desorption
cycles
hydrochloric
acid.
showed
approximately
12%
reduction
first
seventh
cycle.
Also,
Cu
real
water
samples
in
achieved
range
81.69–98.18%.
This
study
demonstrates
potential
use
CIST
accessible
reusable
option
removing
pollutants
aquatic
International Journal of Environmental & Analytical Chemistry,
Год журнала:
2024,
Номер
unknown, С. 1 - 16
Опубликована: Апрель 8, 2024
Water
pollution
is
a
global
concern
due
to
the
unregulated
discharge
of
various
pollutants
into
aquatic
environments
without
proper
treatment.
A
prominent
contributor
environmental
degradation
and
adverse
health
effects
unmitigated
heavy
metal
ions
within
industrial
effluents.
The
present
study
revealed
synthesis
p-imidazolemethylcalix[4]arene-based
resin
(4)
its
application
as
an
adsorbent
for
removal
toxic
metals,
i.e.,
Pb2+and
Cd2+,
from
aqueous
media.
proceeded
through
well-known
organic
synthetic
procedures
was
characterised
by
different
analytical
techniques,
FT-IR,
SEM
elemental
analyses.
However,
adsorption
process
monitored
using
UV-Vis
spectrophotometer.
behaviour
evaluated
batch
experiments,
parameters,
such
pH,
dosage
contact
time,
were
optimised.
experimental
results
Langmuir
Freundlich
isotherm
models.
Moreover,
kinetic
thermodynamic
studies
also
performed
evaluate
data.
maximum
98%
96%,
respectively,
Cd2+
observed
at
pH
7
with
30
mg
after
1
h
ambient
temperature.
compared
those
other
reported
materials,
it
could
be
concluded
that
has
great
potential
minimising
risk
water
pollution.
This
novel
demonstrates
exceptional
versatility
in
capacity
effectively
capture
wide
range
wastewater,
thereby
offering
comprehensive
solution
pressing
concern.
specific
molecular
structure
p-Imidazolemethylcalix[4]arene
enables
selective
efficient
ions,
surpassing
conventional
methods
terms
both
effectiveness
versatility.
characterisation
this
unique
resin,
coupled
demonstrated
efficacy
ion
removal,
represent
significant
advancement
field
remediation.
