ChemistrySelect,
Journal Year:
2024,
Volume and Issue:
9(39)
Published: Oct. 1, 2024
Abstract
To
improve
the
regeneration
efficiency
of
methylene
blue
(MB)
saturated
biochar
in
H
2
O
system,
was
modified
by
Fe‐doped
using
FeSO
4
and
Fe(NO
3
)
as
iron
sources.
The
effects
on
its
microstructure
were
characterized
XRD,
SEM,
BET.
adsorption
performance
before
after
compared
through
experiments.
X‐ray
photoelectron
spectroscopy,
electron
spin
resonance,
quenching
experiments
used
to
explore
mechanism.
results
show
that
(SP‐GBC)
prepared
from
maintains
a
high
specific
surface
area
1205.9
m
/g
capacity
375.43
mg·g
−1
for
MB.
After
adsorption,
MB‐saturated
SP‐GBC
exhibits
excellent
which
efficiencies
five
consecutive
cycles
are
85.76%,
83.92%,
94.01%,
99.24%,
100.79%,
respectively.
synergistic
effect
desorption
degradation
is
main
mechanism
SP‐GBC.
zero
valent
Fe
(II)
active
sites
activation,
while
1
HO·
oxidation
species.
In
summary,
this
work
provides
simple
feasible
method
design
synthesis
adsorbents
with
highly
efficient
performance.
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2024,
Volume and Issue:
9, P. 100623 - 100623
Published: Jan. 14, 2024
Alarming
concern
over
the
persistence
and
toxicity
of
per-
polyfluoroalkyl
substances
(PFAS)
in
environment
has
created
an
imperative
need
for
designing
redesigning
strategies
their
detection
remediation.
Conventional
PFAS
removal
technologies
that
uses
physical,
chemical,
or
biological
methods.
Increase
diversity
quantity
entering
necessitated
developing
more
advanced
integrated
removal.
Despite
advances
reported
this
domain,
there
exist
a
huge
research
gap
to
be
mentored
tackle
problems
associated
with
mitigation
combined
wide
variety
environment.
The
possibility
combine
other
emerging
contaminants
poses
additional
threat
existing
treatment
methods
thereby
stressing
continuous
monitoring
updating
processes.
This
review
work
aims
at
understanding
structure,
entry,
fate
different
types
Further
in-depth
discussion
regarding
levels
is
elaborated
review.
process
description
recent
remediation
techniques
along
significance,
limitations
integration
discussed
detail.
detailed
outlook
on
advantages
insight
into
recently
developed
outlined
Chemosphere,
Journal Year:
2024,
Volume and Issue:
357, P. 142088 - 142088
Published: April 20, 2024
Per-
and
poly-fluoroalkyl
substances
(PFAS)
are
synthetic
chemicals
widely
used
in
everyday
products,
causing
elevated
concentrations
drinking
water
posing
a
global
challenge.
While
adsorption
methods
commonly
employed
for
PFAS
removal,
the
substantial
cost
environmental
footprint
of
commercial
adsorbents
highlight
need
more
cost-effective
alternatives.
Additionally,
existing
exhibit
limited
effectiveness,
particularly
against
diverse
types,
such
as
short-chain
PFAS,
necessitating
modifications
to
enhance
capacity.
Biochar
can
be
considered
eco-friendly
alternative
conventional
adsorbents.
With
abundant
feedstocks
favorable
physicochemical
properties,
biochar
shows
significant
potential
applied
an
adsorbent
removing
contaminants
from
water.
Despite
its
effectiveness
adsorbing
different
inorganic
organic
environments,
some
factors
restrict
effective
application
adsorption.
These
related
characteristics
well
chemistry.
Therefore,
have
been
introduced
overcome
these
limitations
improve
biochar's
This
review
explores
preparation
conditions,
including
pyrolysis
process,
activation,
modification
techniques
capacity
types
PFAS.
It
addresses
critical
questions
about
performance
composites,
mechanisms
governing
adsorption,
challenges,
future
perspectives
this
field.
The
surge
research
on
indicates
growing
interest,
making
timely
valuable
resource
in-depth
exploration
remediation.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 10, 2024
Abstract
Polymers
derived
from
renewable
carbon
feedstock
are
destined
to
play
a
pivotal
role
in
the
transition
sustainable
circular
economy,
displacing
conventional
fossil‐carbon
materials.
Chitin
(CT)
and
chitosan
(CS)
well‐suited
develop
multifunctional
materials
that
mechanically
resilient
easy
process.
Their
abundance
of
hydroxyl
amine
groups
facilitates
hydrogen
bonding
electrostatic
interactions,
making
them
suitable
for
persistent
pollutant
removal
drinking
water.
Therefore,
porous
CS
cryogels
fabricated
by
dissolution
acetic
acid,
coagulation,
subsequent
freeze‐drying.
To
enhance
durability
harsh
environments,
CT
obtained
through
acetylation.
Furthermore,
Fe
3
O
4
nanoparticles
incorporated
enable
external
magnetic
fields.
The
rapid
per‐
polyfluoroalkyl
substances
(PFASs)
with
capacities
reaching
451
mg
g
−1
offers
competitive
performance
against
state‐of‐the‐art
shear‐thinning
properties
additive
manufacturing
predetermined
free‐standing
shapes,
useful
accessing
sites
complex
geometries.
Life
cycle
assessment
(LCA)
confirms
suitability
low
environmental
impact
water
remediation
applications.
can
be
recycled,
closing
material
loops
back
into
economic
cycle.
Altogether,
this
work
demonstrates
potential
as
alternatives
systems
remediation.
ACS ES&T Water,
Journal Year:
2024,
Volume and Issue:
4(7), P. 3078 - 3088
Published: June 29, 2024
This
study
presents
a
sustainable
treatment
of
perfluoroalkyl
or
polyfluoroalkyl
substances
in
aquatic
environments,
focusing
on
perfluorooctanoic
acid
(PFOA),
through
adsorption.
The
employs
response
surface
methodology
to
assess
the
influence
adsorbent's
synthesis
parameters─specifically,
quantities
calcium,
sodium
alginate,
and
cetyltrimethylammonium
bromide
(CTAB)─on
adsorption
efficiency
alginate
hydrogel.
optimally
synthesized
hydrogel
exhibits
an
average
PFOA
removal
94.8
±
2.1%
at
50
mg/L
concentration.
experimental
data
for
closely
align
with
pseudo-second-order
rate
kinetic
model
(R2
=
0.97)
Sips
isotherm
0.99),
maximum
possible
capacity
382.1
mg/g.
Hydrogen
bonding
electrostatic
hydrophobic
interactions
are
identified
as
primary
mechanisms
driving
by
high
values
selectivity
parameters,
indicative
its
preference
even
presence
background
river
water
matrix.
A
regenerant
solution
50%
ethanol
0.25%
ammonium
hydroxide
demonstrates
∼80%
regeneration
capability,
although
it
falls
∼70%
after
three
adsorption–desorption
cycles.
provides
insights
into
performance
CTAB-functionalized
hydrogel,
showcasing
uptake
PFOA.
