Environmental Health Engineering and Management,
Год журнала:
2024,
Номер
11(3), С. 273 - 284
Опубликована: Июнь 28, 2024
Background:
Congo
red
(CR),
a
harmful
dye
present
in
water,
requires
effective
removal
methods.
This
study
investigated
the
utilization
of
dry
green
pea
husk
(DGPH)
and
its
charcoal
(CGPH)
as
economical
eco-friendly
adsorbents.
Methods:
Various
factors,
including
contact
time,
pH,
adsorbent
dosage,
initial
concentration,
temperature,
were
to
assess
their
impact
on
adsorption
process.
Also,
different
models
(isotherms,
kinetics,
thermodynamics)
compared
describe
phenomenon.
Results:
Equilibrium
was
achieved
within
30
minutes
for
both
The
optimum
pH
CR
determined
be
2.
capacity
decreased
by
increasing
whereas
it
increased
concentration.
Langmuir
isotherm
model
demonstrated
best
fit
DGPH,
while
Freundlich
exhibited
CGPH.
pseudo-second-order
displayed
superior
To
spontaneity
feasibility
process,
thermodynamic
parameters
enthalpy,
entropy,
Gibbs
free
energy
computed.
results
indicated
that
DGPH
endothermic
favorable
at
lower
temperatures,
CGPH
exothermic
higher
temperatures.
negative
values
confirmed
spontaneous
nature
Conclusion:
establishes
are
environmentally
friendly
alternatives
from
water.
ChemEngineering,
Год журнала:
2023,
Номер
7(6), С. 114 - 114
Опубликована: Дек. 1, 2023
In
the
information
contained
herein,
we
fabricated
biochar
by
means
of
a
pyrolysis
process;
it
used
Prosopis
juliflora
waste
(PJW)
as
biomass
source.
The
physical
and
chemical
material
characterization
was
carried
out
through
FTIR,
thermogravimetric,
BET-N2
isotherm,
SEM-EDX
assays.
We
studied
methylene
orange
(MO)
adsorption
onto
PWJ
biochar.
PJW
displayed
maximum
percentage
MO
removal
64%.
results
study
indicated
that
Temkin
isotherm
suitable
to
describe
process
on
biochar;
suggests
could
be
multi-layer
process.
Results
showed
pseudo-second-order
model
accurate
in
demonstrating
(k2
=
0.295
g
mg−1min−1;
qe
8.31
mg
g−1).
Furthermore,
made
known
endothermic
(ΔH
12.7
kJ/mol)
spontaneous
(ΔG
−0.954
kJ/mol).
reusability
test
disclosed
after
four
consecutive
adsorption/desorption
cycles,
reduced
its
only
4.3%.
Congo
Red,
renowned
for
its
chemical
composition,
characterized
by
two
azo
bonds
(-N=N-).Congo
Red
not
only
highly
toxic,
but
also
resistant
to
degradation,
contributing
environmental
persistence.This
research
was
analyze
the
efficiency
of
Entodon
prorepens
moss
biomass
removal
dye
from
aqueous
solutions.The
impact
varying
concentrations,
contact
time,
pH,
dosage,
and
temperature
examined.FE-SEM
FTIR
techniques
were
used
in
this
research.Point-zero
charge,
kinetics,
isotherms,
thermodynamics
investigated.The
pseudo-second-order
kinetic
model
provided
best
fit
data
CR
removal.The
Freundlich
isotherm
an
excellent
with
a
maximum
adsorption
capacity
118.45
mg/g.Adsorption
found
be
endothermic
spontaneous.Microtoxicity
assessment
revealed
that
solutions
after
less
toxic
than
crude
effectively
removed
could
reused
up
three
cycles.
Environmental Health Engineering and Management,
Год журнала:
2024,
Номер
11(3), С. 273 - 284
Опубликована: Июнь 28, 2024
Background:
Congo
red
(CR),
a
harmful
dye
present
in
water,
requires
effective
removal
methods.
This
study
investigated
the
utilization
of
dry
green
pea
husk
(DGPH)
and
its
charcoal
(CGPH)
as
economical
eco-friendly
adsorbents.
Methods:
Various
factors,
including
contact
time,
pH,
adsorbent
dosage,
initial
concentration,
temperature,
were
to
assess
their
impact
on
adsorption
process.
Also,
different
models
(isotherms,
kinetics,
thermodynamics)
compared
describe
phenomenon.
Results:
Equilibrium
was
achieved
within
30
minutes
for
both
The
optimum
pH
CR
determined
be
2.
capacity
decreased
by
increasing
whereas
it
increased
concentration.
Langmuir
isotherm
model
demonstrated
best
fit
DGPH,
while
Freundlich
exhibited
CGPH.
pseudo-second-order
displayed
superior
To
spontaneity
feasibility
process,
thermodynamic
parameters
enthalpy,
entropy,
Gibbs
free
energy
computed.
results
indicated
that
DGPH
endothermic
favorable
at
lower
temperatures,
CGPH
exothermic
higher
temperatures.
negative
values
confirmed
spontaneous
nature
Conclusion:
establishes
are
environmentally
friendly
alternatives
from
water.
