Materials,
Journal Year:
2023,
Volume and Issue:
16(12), P. 4285 - 4285
Published: June 9, 2023
The
aim
of
the
study
was
to
prepare
effective
low-cost
green
adsorbents
based
on
spent
black
tea
leaves
for
removal
nitrate
ions
from
aqueous
solutions.
These
were
obtained
either
by
thermally
treating
produce
biochar
(UBT-TT),
or
employing
untreated
waste
(UBT)
obtain
convenient
bio-sorbents.
characterized
before
and
after
adsorption
Scanning
Electron
Microscopy
(SEM),
Energy
Dispersed
X-ray
analysis
(EDX),
Infrared
Spectroscopy
(FTIR),
Thermal
Gravimetric
Analysis
(TGA).
experimental
conditions,
such
as
pH,
temperature,
concentration
studied
evaluate
interaction
nitrates
with
potential
synthetic
Langmuir,
Freundlich
Temkin
isotherms
applied
derive
parameters
data.
maximum
intakes
UBT
UBT-TT
59.44
mg/g
61.425
mg/g,
respectively.
data
this
best
fitted
isotherm
equilibrium
(the
values
R2
=
0.9431
0.9414
UBT-TT),
assuming
multi-layer
onto
a
surface
finite
number
sites.
model
could
explain
mechanism.
results
indicated
that
serve
novel
biowaste
materials
