Environmental Challenges,
Journal Year:
2023,
Volume and Issue:
14, P. 100829 - 100829
Published: Dec. 30, 2023
Utilizing
Bagasse
Fly
Ash
(BFA)
as
an
adsorbent,
a
byproduct
from
the
sugar
industry,
proved
effective
in
removing
mixture
of
Malachite
Green
and
Methylene
Blue
dyes
aqueous
solutions.
To
enhance
its
efficacy,
fly
ash
underwent
chemical
modification
detailed
characterization
using
FTIR,
XRD,
SEM,
TGA
analyses.
Subsequently,
adsorption
studies
were
conducted
to
optimize
critical
parameters—initial
dye
concentration,
contact
time,
pH
levels—employing
Mixed-Level
Factorial
design
pinpoint
most
favorable
conditions
for
efficient
removal.
The
modified
resulted
maximum
capacity
18.75
mg/g
(71.5%)
15.5
(67.2%)
at
initial
concentration
100
mg/L,
9.6,
time
51.5
min.
Analysis
sorption
data
involved
rigorous
application
both
Langmuir
Freundlich
isotherm
models,
revealing
strong
fit
linear
representation
dyes.
Specifically,
R2
values
0.97
0.93
observed
Green,
while
notably
higher
0.99
0.96
obtained
Blue,
affirming
excellent
model-data
agreement.
Additionally,
kinetic
study
revealed
that
process
(MB
MG)
followed
pseudo-second-order
model
(R2
>
0.99),
indicating
chemisorption
dominant
mechanism
providing
valuable
insights
into
dynamic
behavior
process.
Carbon Research,
Journal Year:
2022,
Volume and Issue:
1(1)
Published: June 18, 2022
Abstract
With
social
progress
and
industrial
development,
heavy
metal
pollution
in
water
soils
environment
is
becoming
more
serious.
Although
biochar
a
low-cost
environmentally
friendly
adsorbent
for
ions,
its
adsorption
immobilization
efficiency
still
need
to
be
improved.
As
an
upgraded
version
of
biochar,
modified
has
attracted
extensive
attention
the
scientific
community.
This
review
summarized
recent
research
on
treatment
methods
pollutants
using
biochar.
The
features
advantages
modification
techniques
such
as
physical
modification,
chemical
biological
other
categories
were
discussed.
mechanism
removing
metals
from
soil
by
was
summarized.
It
found
that
had
better
performance
after
which
provided
higher
surface
areas
functional
groups,
enough
binding
sites
combine
ions.
Biochar
very
promising
candidate
environment.
Furthermore,
some
high
valent
ions
could
reduced
low
metals,
Cr(VI)
reduction
Cr(III),
form
precipitates
in-situ
sorption-reduction-precipitation
strategy.
However,
it
direction
efforts
develop
high-efficiency
with
low-cost,
sorption
capacity,
photocatalytic
performance,
no
secondary
future.
ACS Applied Materials & Interfaces,
Journal Year:
2022,
Volume and Issue:
14(5), P. 7450 - 7463
Published: Jan. 25, 2022
Sorption
methodologies
play
a
pivotal
role
in
heavy
metal
removal
to
meet
the
global
requirements
for
uninterrupted
access
drinkable
water.
Standard
sorption
technologies
lack
efficiency
due
weak
adsorbent-metal
interaction.
To
this
end,
layered
cationic
framework
material
loaded
with
phosphonate
was
first
fabricated
by
facile
intercalation
method
capture
hazardous
metals
from
an
aqueous
solution.
inquire
mechanisms,
batch
experiments,
detection
technologies,
and
simulation
calculations
were
employed
study
interactions
at
interface
of
clay/water.
Specifically,
functionalized
double
hydroxide
possessed
excellent
chelation
adsorption
properties
Zn2+
(281.36
mg/g)
Fe3+
(206.03
mg/g),
which
model
fitting
results
revealed
that
process
chemisorption
monolayer
Further,
interfacial
interaction
between
clay
surface
evaluated
molecular
dynamics
simulation,
new
concept
named
region
indicator
used
characterize
coordinate
bonds.
The
deep
insight
into
mechanism
visually
presented
via
orbital
diagram.
In
addition,
regeneration
spent
adsorbent,
column
test,
acute
toxicity
analysis
demonstrated
synthesized
has
immense
potential
terms
practical
usage
treatment
toxic
pollutants.
These
provide
novel
path
researchers
properly
understand
behavior.
