It
has
been
reported
that
Cr(VI)
can
be
reduced
by
biochar
because
of
its
redox
activity.
Considering
the
anionic
form
Cr(VI),
we
hypothesize
reduction
in
aqueous
phase
is
significant.
However,
contribution
different
reactive
oxygen
species
biochar-Cr(VI)
reaction
system
not
distinguished.
Herein,
quantitatively
identified
adsorption
and
systems.
The
content
was
1.5
times
higher
aerobic
conditions
than
anaerobic
conditions.
disappearance
·O2-
under
illustrated
may
involved
Cr(VI).
quenching
studies
indicated
that·O2-
contributed
34%
reduction,
while
1O2
negligible,
probably
due
to
stronger
electron-donating
capacity
·O2-.
degradation
nitrotetrazolium
blue
chloride
(quenching
agent
·O2-)
confirmed
process
mainly
occurred
liquid-phase.
Boehm
titration
quantification
further
elucidated
significant
correlation
(P
<
0.05)
between
phenolic
groups
formation
·O2-,
which
implied
acted
as
primary
electron
donors
generating
This
study
highlights
importance
liquid-phase
removing
provides
theoretical
support
for
conversion
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2023,
Volume and Issue:
8, P. 100495 - 100495
Published: Sept. 22, 2023
Heavy
metal
pollution
is
a
serious
environmental
problem
that
poses
threat
to
human
health
and
the
environment.
Water
by
toxic
heavy
metals
major
cause
of
this
problem,
it
can
destroy
ecosystems,
spread
disease,
make
drinking
water
unsafe.
Biochar
promising
green
adsorbent
for
removing
from
water.
It
derived
various
biomasses,
including
agricultural
organic
wastes,
has
high
carbon
content,
surface
area,
stability.
These
properties
enable
biochar
effectively
remove
through
cation
exchange
adsorption.
This
review
summarizes
recent
advances
in
modification
enhanced
adsorption
metals.
discusses
advantages,
applications,
challenges,
prospects
method.
Biochar-based
advanced
oxidation
processes
(AOPs)
have
shown
promise
decomposition
complexes
enhancement
capacity
free
ions
industrial
wastewater.
The
also
highlights
research
gaps
limitations
remediation
proposes
future
directions.
Future
should
focus
on
developing
environmentally
friendly
cost-effective
technologies
scaling
up
biochar-based
removal
applications.
Scheme
1
illustrates
overall
summarized
presentation
article
as
graphical
abstract.
Biochar,
Journal Year:
2024,
Volume and Issue:
6(1)
Published: March 1, 2024
Abstract
Soil
contamination
by
uranium
presents
a
burgeoning
global
environmental
concern,
exerting
detrimental
effects
on
both
agricultural
production
and
soil
health.
Biochar,
carbonaceous
material
derived
from
biomass
pyrolysis,
exhibits
considerable
potential
for
remediating
uranium-contaminated
soils.
However,
comprehensive
review
of
the
biochar
fate
accumulation
in
soil–plant
systems
remains
conspicuously
absent.
In
this
paper,
sources
are
reviewed,
impact
immobilization
detoxification
is
analyzed.
We
reviewed
status
soils
globally
found
that
mining
activities
currently
main
sources.
Further
meta-analysis
revealed
addition
significantly
reduced
bioavailability
shoot
accumulation,
their
effect
value
58.9%
(40.8–76.8%)
39.7%
(15.7–63.8%),
respectively.
Additionally,
enhances
microenvironment,
providing
favourable
conditions
promoting
plant
growth
reducing
mobility.
focused
mechanisms
governing
interaction
between
uranium,
emphasising
roles
played
surface
complexation,
reduction,
ion
exchange,
physical
adsorption.
The
modification
intensifying
these
can
promote
immobilisation
Finally,
alleviates
oxidative
stress
reduces
tissues,
thereby
mitigating
adverse
development.
Overall,
our
highlights
capacity
to
remediate
through
diverse
mechanisms,
valuable
insights
sustainable
remediation.
Highlights
Biochar
mobility
variety
including
limits
its
plants.
Modified
has
been
shown
enhance
effectiveness
immobilising
uranium.
application
not
only
promotes
remediation
but
also
improves
quality.
Graphical
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(9), P. 4927 - 4939
Published: Feb. 20, 2024
Serious
water
contamination
induced
by
massive
discharge
of
cadmium(II)
ions
is
becoming
an
emergent
environmental
issue
due
to
high
toxicity
and
bioaccumulation;
thus,
it
extremely
urgent
develop
functional
materials
for
effectively
treating
with
Cd2+
from
wastewater.
Benefiting
abundant
binding
sites,
simple
preparation
process,
adjustable
structure,
UiO-66-type
metal–organic
frameworks
(MOFs)
had
emerged
as
promising
candidates
in
heavy
metal
adsorption.
Herein,
monolithic
UiO-66-(COOH)2-functionalized
cellulose
fiber
(UCLF)
adsorbents
were
simply
fabricated
incorporating
MOFs
into
membranes
through
physical
blending
self-entanglement.
A
two-dimensional
structure
was
facilely
constructed
fibers
sustainable
biomass
agricultural
waste,
providing
a
support
platform
the
integration
eco-friendly
UiO-66-(COOH)2
synthesized
lower
temperature
solvent.
Structure
characterization
bath
experiments
performed
determine
operational
conditions
maximization
adsorption
capacity,
thereby
bringing
out
excellent
capacity
96.10
mg/g.
UCLF
adsorbent
holding
10
wt
%
loadings
(UCLF-2)
exhibited
higher
toward
compared
other
related
adsorbents.
Based
on
kinetics,
isotherms,
thermodynamics,
behavior
spontaneous,
exothermic,
well
monolayer
chemisorption.
Coordination
electrostatic
attraction
perhaps
mechanisms
involved
deeply
unveiled
effects
adsorbate
solution
pH
X-ray
photoelectron
spectroscopy.
Moreover,
UCLF-2
good
mechanical
strength
offered
structural
guarantee
successful
implementation
practical
applications.
This
study
manifested
feasibility
used
novel
strategy
shape
MOF
wastewater
decontamination.
