Arginine-modified surface coffee grounds activated carbon for Pb\(^{2+}\) adsorption: Kinetic, isotherm and thermodynamic studies
Jarawee CHUPIROM,
Sirikorn KHAOPHONG,
Nopporn HEMYAKORN
и другие.
Journal of Metals Materials and Minerals,
Год журнала:
2025,
Номер
35(1), С. e2148 - e2148
Опубликована: Фев. 21, 2025
This
research
focuses
on
enhancing
the
value
of
coffee
waste
by
converting
it
into
activated
carbon
for
removing
Pb²⁺
ions
from
contaminated
water.
Coffee
grounds
were
with
KOH
and
carbonized
at
600°C
4
h
to
produce
(CGAC),
then
modified
arginine
via
hydrothermal
treatment
120°C
48
create
Arg-CGAC.
The
adsorbents'
chemical
physical
properties
analyzed
using
SEM,
FT-IR,
BET,
pHpzc
methods.
Batch
experiments
revealed
that
Arg-CGAC
exhibited
superior
Pb2+
adsorption
(223.10
mg∙g‒1)
compared
CGAC
(119.23
under
optimal
conditions.
Isotherm
analysis
showed
stronger
adsorbate-adsorbent
interactions
a
more
endothermic
demonstrated
both
physisorption
weak
chemisorption,
while
primarily
physisorption.
Increasing
temperatures
made
ΔG°
values
negative,
indicating
favorable
Desorption
tests
98%
yield
over
four
cycles,
but
efficiency
declined
after
7th
cycle,
stabilizing
55%
60%,
suggesting
good
initial
performance
despite
some
regeneration
limitations.
Язык: Английский
Egyptian seaweed resources from the South Sinai coast to develop alginate-based biohybrid composites for enhanced lead(II) removal from industrial wastewater
Desalination and Water Treatment,
Год журнала:
2024,
Номер
unknown, С. 100929 - 100929
Опубликована: Дек. 1, 2024
Язык: Английский