Nanomaterials,
Год журнала:
2022,
Номер
12(21), С. 3852 - 3852
Опубликована: Ноя. 1, 2022
An
efficient
adsorbent,
CNTs–PAMAM–Ag,
was
prepared
by
grafting
fourth-generation
aromatic
poly(amidoamine)
(PAMAM)
to
carbon
nanotubes
(CNTs)
and
successive
deposition
of
Ag
nanoparticles.
The
FT–IR,
XRD,
TEM
XPS
results
confirmed
the
successful
PAMAM
onto
CNTs
absorption
efficiency
CNTs–PAMAM–Ag
evaluated
estimating
adsorption
two
toxic
contaminants
in
water,
viz.,
Pb(II)
As(III).
Using
about
99
76%
As(III)
adsorption,
respectively,
were
attained
within
15
min.
controlling
mechanisms
for
dynamics
revealed
applying
pseudo-first
second-order
kinetic
models.
pseudo-second-order
model
followed
Therefore,
incidence
chemisorption
through
sharing
or
exchanging
electrons
between
ions
could
be
rate-controlling
step
process.
Further,
Weber–Morris
intraparticle
pore
diffusion
employed
find
reaction
pathways
adsorption.
It
that
not
a
As(III);
instead,
it
controlled
both
boundary
layer
effect.
equilibrium
using
Langmuir,
Freundlich,
Temkin
isotherm
data
adequately
fitted
Langmuir
compared
Freundlich
Sensors,
Год журнала:
2023,
Номер
23(8), С. 4125 - 4125
Опубликована: Апрель 20, 2023
Heavy
metal
ions,
one
of
the
major
pollutants
in
environment,
exhibit
non-degradable
and
bio-chain
accumulation
characteristics,
seriously
damage
threaten
human
health.
Traditional
heavy
ion
detection
methods
often
require
complex
expensive
instruments,
professional
operation,
tedious
sample
preparation,
high
requirements
for
laboratory
conditions,
operator
professionalism,
they
cannot
be
widely
used
field
real-time
rapid
detection.
Therefore,
developing
portable,
highly
sensitive,
selective,
economical
sensors
is
necessary
toxic
ions
field.
This
paper
presents
portable
sensing
based
on
optical
electrochemical
situ
trace
ions.
Progress
research
sensor
devices
fluorescence,
colorimetric,
surface
Raman
enhancement,
plasmon
resonance,
various
electrical
parameter
analysis
principles
highlighted,
characteristics
limits,
linear
ranges,
stability
are
analyzed.
Accordingly,
this
review
provides
a
reference
design
sensing.
Environment International,
Год журнала:
2024,
Номер
188, С. 108736 - 108736
Опубликована: Май 10, 2024
The
presence
of
microplastics
(MPs)
is
increasing
at
a
dramatic
rate
globally,
posing
risks
for
exposure
and
subsequent
potential
adverse
effects
on
human
health.
Apart
from
being
physical
objects,
MP
particles
contain
thousands
plastic-associated
chemicals
(i.e.,
monomers,
chemical
additives,
non-intentionally
added
substances)
captured
within
the
polymer
matrix.
These
are
often
migrating
MPs
can
be
found
in
various
environmental
matrices
food
chains;
health
effects.
In
addition
to
attributes
MPs,
plastic
surfaces
effectively
bind
exogenous
chemicals,
including
pollutants
(e.g.,
heavy
metals,
persistent
organic
pollutants).
Therefore,
act
as
vectors
pollution
across
air,
drinking
water,
food,
further
amplifying
posed
by
exposure.
Critically,
fragmentation
plastics
environment
increases
risk
interactions
with
cells,
available
leach
adsorb
transfer
pollutants.
This
review
proposes
so-called
triple
nexus
approach
comprehensively
map
existing
knowledge
interconnected
particles,
Based
data,
there
large
gap
regard
cumulative
nexus.
Each
component
known
induce
genotoxicity,
inflammation,
endocrine
disruption,
but
about
long-term
inter-individual
lacking.
Furthermore,
not
readily
excreted
organisms
after
ingestion
they
have
been
accumulated
blood,
cardiac
tissue,
placenta,
etc.
Even
though
number
studies
MPs-associated
impacts
rapidly,
this
underscores
that
pressing
necessity
achieve
an
integrated
assessment
MPs'
order
address
future
gaps.
Sensors,
Год журнала:
2023,
Номер
23(22), С. 9080 - 9080
Опубликована: Ноя. 9, 2023
Human
exposure
to
acute
and
chronic
levels
of
heavy
metal
ions
are
linked
with
various
health
issues,
including
reduced
children’s
intelligence
quotients,
developmental
challenges,
cancers,
hypertension,
immune
system
compromises,
cytotoxicity,
oxidative
cellular
damage,
neurological
disorders,
among
other
challenges.
The
potential
environmental
HMI
contaminations,
the
biomagnification
along
food
chains,
associated
risk
factors
on
public
safety
a
global
concern
top
priority.
Hence,
developing
low-cost
analytical
protocols
capable
rapid,
selective,
sensitive,
accurate
detection
in
samples
consumable
products
is
interest.
Conventional
flame
atomic
absorption
spectroscopy,
graphite
furnace
emission
inductively
coupled
plasma–optical
plasma–mass
X-ray
diffractometry,
fluorescence
have
been
well-developed
for
HMIs
trace
element
analysis
excellent
but
varying
degrees
sensitivity,
selectivity,
accuracy.
In
addition
high
instrumental
running
maintenance
costs
specialized
personnel
training,
these
instruments
not
portable,
limiting
their
practicality
on-demand,
situ,
field
study,
or
point-of-need
detection.
Increases
use
electrochemical
colorimetric
techniques
ion
detections
arise
because
portable
instrumentation,
sensitivity
cost-effectiveness,
small
size
requirements,
rapidity,
visual
nanosensors
that
facilitate
detections.
This
review
highlights
new
approach
low-cost,
ecosystems
(soil,
water,
air)
products.
Specifically,
recent
advances
smartphone-operated
screen-printed
electrodes
(SPEs),
plastic
chip
SPES,
carbon
fiber
paper-based
addition,
requirements.
provides
advantages
optical
over
conventional
methods
analyses.
further
in-depth
coverage
arsenic
(As),
cadmium
(Cd),
chromium
(Cr),
copper
(Cu),
mercury
(Hg),
manganese
(Mn),
nickel
(Ni),
lead
(Pb),
zinc
(Zn)
ecosystem,
emphasis
biological
samples.
discusses
challenges
current
protocol
It
insight
into
future
directions
