ABSTRACT
Heavy
metals
have
been
classified
as
dangerous
environmental
pollutants.
Interest
in
feasible
ways
to
reduce
heavy
pollution
is
a
noble
goal.
Adsorption
an
effective
method
based
on
its
effectiveness
and
low-
cost.
Nowadays,
low-cost
bio-sorbents
utilized
replace
costly
expensive
adsorbents.
Rich
cellulose
materials
are
metal
adsorbents,
their
performance
can
be
enhanced
via
chemical
modification.
The
present
work
reviews
the
steady
progress
utilization
of
agriculture
by-product
wastes
bio-sorbent.
unique
advantages
these
by-products
such
renewability,
abundance,
simple
processing,
low
cost,
justifier
this
work.
results
confirm
that
chemically
treated
agro-wastes
exhibit
high-
removal
efficiency
(reaches
95%
most
cases).
adsorption
isotherm
studies
indicate
concentration
ions
has
significant
effect
process.
Freundlich
model
provides
physical
bio-sorbent
surface.
Langmuir
offers
estimate
different
factors
kinetics
offer
idea
reaction
pathways
including
mechanism
ion
removal.
Applying
pseudo-first-order
pseudo-second-order
models
describes
kinetics.
This
information
developing
strategies
remove
using
agro-waste.
data
confirmed
modification
parameter
feasibility
cellulosic
should
given
attention
encouraged.
Gels,
Journal Year:
2023,
Volume and Issue:
9(5), P. 358 - 358
Published: April 24, 2023
In
this
work,
stabilized
ionotropic
hydrogels
were
designed
using
sodium
carboxymethyl
cellulose
(CMC)
and
assessed
as
inexpensive
sorbents
for
hazardous
chemicals
(e.g.,
Methylene
Blue,
MB)
from
contaminated
wastewaters.
order
to
increase
the
adsorption
capacity
of
hydrogelated
matrix
facilitate
its
magnetic
separation
aqueous
solutions,
dodecyl
sulfate
(SDS)
manganese
ferrite
(MnFe2O4)
introduced
into
polymer
framework.
The
morphological,
structural,
elemental,
properties
adsorbents
(in
form
beads)
scanning
electron
microscopy
(SEM),
energy-dispersive
X-ray
analysis,
Fourier-transform
infrared
spectroscopy
(FTIR),
a
vibrating-sample
magnetometer
(VSM).
beads
with
best
performance
subjected
kinetic
isotherm
studies.
PFO
model
describes
kinetics.
A
homogeneous
monolayer
system
was
predicted
by
Langmuir
model,
registering
maximum
234
mg/g
at
300
K.
calculated
thermodynamic
parameter
values
indicated
that
investigated
processes
both
spontaneous
(ΔG
<
0)
exothermic
(ΔH
0).
used
sorbent
can
be
recovered
after
immersion
in
acetone
(93%
desorption
efficiency)
re-used
MB
adsorption.
addition,
molecular
docking
simulations
disclosed
aspects
mechanism
intermolecular
interaction
between
CMC
detailing
contributions
van
der
Waals
(physical)
Coulomb
(electrostatic)
forces.
Polymers,
Journal Year:
2023,
Volume and Issue:
15(22), P. 4389 - 4389
Published: Nov. 12, 2023
Increased
demand
for
environmentally
friendly
materials
resulted
in
a
worldwide
interest
manufacturing
composite
from
agricultural
wastes.
Thus,
this
paper
presents
the
results
of
research
on
synthesis
eco-friendly
composites
and
their
properties.
For
preparation,
unsaturated
polyester
resin
based
post-consumer
recycled
poly
(ethylene
terephthalate)
was
filled
with
walnut
(Júglans
régia
L.)
shell
powder.
After
filler
incorporation,
deterioration
gloss
mechanical
properties
were
observed.
The
flexural
strength
modulus
are
significantly
affected
by
amount.
Distilled
water,
1%
sodium
hydroxide,
toluene,
acetone
used
as
solvents
chemical
resistance
test.
Changes
to
structure
after
49
days
immersion
investigated.
water
has
no
significant
effect
pure
resin,
but
its
composites,
plasticizing
show
that
all
specimens
toward
toluene.
In
acetone,
shrink
fall
into
pieces,
most
destructive
is
an
alkaline
environment.
test,
huge
increase
mass
Polymers,
Journal Year:
2023,
Volume and Issue:
15(20), P. 4144 - 4144
Published: Oct. 19, 2023
Chitosan/Hydroxyapatite
composites,
enriched
with
relatively
active
-NH2
and
-OH
groups,
have
emerged
as
promising
adsorbents
for
heavy
metal
removal.
In
this
study,
we
harnessed
the
potential
of
CS/HAP
composites
by
developing
monolithic
PLA@CS/HAP
filters
utilizing
3D
printing
freeze-drying
techniques.
These
possess
both
macroscopic
microscopic
porous
structures,
endowing
them
exceptional
capabilities
removing
metals
from
water.
The
adsorption
properties
were
explored
varying
dosage,
duration,
initial
concentrations
copper
ions.
maximum
capacity
Cu2+
was
determined
to
be
approximately
119+/-1
mg/g
at
natural
pH
298
K.
Notably,
demonstrated
remarkable
efficiency
in
removal
ions,
90%
ions
effectively
removed
within
a
mere
2-h
period
cyclic
experiment.
Furthermore,
exhibited
robust
dynamic
(80.8%
or
even
better
less
than
35
min)
Importantly,
all
materials
employed
study
environmentally
friendly.
summary,
filter
offers
advantages
such
ease
preparation,
eco-friendliness,
versatility,
broad
applicability
diverse
wastewater
treatment
scenarios,
thereby
presenting
significant
practical
implementation.
Cleaner Water,
Journal Year:
2024,
Volume and Issue:
2, P. 100030 - 100030
Published: Aug. 10, 2024
Overpopulation,
expansion
of
agricultural
practices,
misuse
water
resources,
industrialization,
and
urbanization
are
among
the
major
factors
that
have
a
big
impact
on
quantity
quality
water.
It
has
been
projected
around
4
billion
humans
would
lack
access
to
pure
by
2025.
Thus,
for
sustainable
lifestyle,
it
is
imperative
improve
quality.
Conventional
wastewater
treatment
technologies
involve
various
chemical
processes
such
as
coagulation
disinfection
physical
methods
filtration
adsorption.
For
these
processes,
chemicals
being
used
alum
lime
in
coagulation,
chlorine
bromine
disinfection,
activated
alumina,
silica
gel
zeolites
However,
high
procurement
cost
display
negative
impacts
environment
human
health,
due
which
plant
based
coagulants,
adsorbents,
disinfectants
now
majorly
tested
methods.
The
objective
this
review
article
provide
recent
update
derived
wastewater.
This
critically
examines
conventional
cleaning
discusses
their
mechanisms.
Prior
study,
plant-based
mainly
separately
reviewed,
but
proper
combined
study
lacking.
present
manuscript
highlights
procedure
plants
first
then
all
three
sequentially.
may
be
useful
development
an
efficient
method
employing
disinfectants.
will
also
beneficial
researchers
who
actively
working
Nanoscale,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 20, 2024
The
use
of
walnut
shells
for
energy
storage
offers
a
sustainable,
innovative
approach,
enhancing
density
and
cost
efficiency.
While
it
presents
environmental
benefits,
challenges
remain
in
scalability
optimization.
Polymers,
Journal Year:
2023,
Volume and Issue:
15(9), P. 2100 - 2100
Published: April 28, 2023
Woody
lignocellulosic
biomasses
comprise
the
non-edible
parts
of
fruit
trees.
In
recent
years,
exploitation
this
biomass
has
been
widening
in
order
to
mitigate
environmental
issues.
At
same
time,
waste
could
be
transformed
into
a
value-added
product
(active
carbon
by
pyrolysis,
isolation
nanocellulose,
oils
or
proteins).
For
either
valorization
path,
complete
thermo-mechanical
characterization
is
required.
A
detailed
study
(TGA,
DSC,
DMA)
was
performed
on
two
types
wastes,
with
and
without
kernels:
one
side,
walnut
shells
(WS)
pistachio
(PsS)
and,
second
category,
apricot
seeds
(AS),
date
(DS),
plum
(PS).
The
results
sample-controlled
thermal
analyses
(HiRes
TGA)
evidenced
better
resolution
degradation
steps
WS.
Kinetic
studies
conducted
also
conventional
TGA
(Flynn–Wall–Ozawa)
modulated
(MTGA)
allowed
us
make
comparative
reasonings
concerning
investigated
biomasses.
DMA
revealed
effect
water
traces
oil
kernels
relaxation
supported
atypical
DSC
endotherm
emphasized
freezing
temperature
domain.
Polymers,
Journal Year:
2023,
Volume and Issue:
15(19), P. 3923 - 3923
Published: Sept. 28, 2023
In
this
work,
a
new
lignocellulosic
adsorbent
was
obtained
and
tested
for
crystal
violet
dye
removal
from
water.
The
material
hart’s-tongue
fern
(Asplenium
scolopendrium)
leaves
after
minimal
processing,
without
chemical
or
thermal
treatment.
surface
of
the
characterized
using
variety
techniques,
including
FTIR,
SEM,
color
analysis.
effect
various
factors
on
adsorption
capacity
then
investigated
discussed.
kinetic
equilibrium
studies
showed
that
general-order
model
Sips
isotherm
are
most
suitable
to
describe
process.
time
reached
20
min
maximum
calculated
value
224.2
(mg
g−1).
determined
values
thermodynamic
parameters
indicated
physical
as
main
mechanism
involved
in
Taguchi
method
used
optimize
conditions
identify
influential
controllable
factor,
which
pH.
ANOVA
(general
linear
model)
calculate
percentage
contribution
each
factor
efficiency.
Analysis
all
results
shows
very
inexpensive,
readily
available,
effective
removing
aqueous
solutions.
