Resources,
Journal Year:
2023,
Volume and Issue:
12(7), P. 84 - 84
Published: July 17, 2023
Low
concentrations
of
fluoride
(F−)
in
drinking
water
are
beneficial
for
oral
health,
but
the
natural
occurrence
high
F−
content
has
been
reported
various
groundwater
sources,
posing
a
continuous
ingestion
threat
to
humans.
The
utilization
biochar
(BC)
produced
from
residual
biomass
emerged
as
technically,
economically,
and
environmentally
sustainable
alternative
removal
through
adsorption.
Therefore,
this
study
aimed
investigate
physicochemical
characteristics
BC
derived
coffee
grounds
influence
factors
on
adsorption
process
aqueous
media,
including
pH,
adsorbent
dosage,
contact
time,
temperature,
initial
concentration.
exhibited
surface
area
12.94
m2·g−1
pore
volume
0.0349
cm3·g−1.
was
strongly
pH
dependent,
demonstrating
significant
decline
performance
increased
2.0
onwards.
majority
occurred
within
first
5
min,
reaching
equilibrium
after
1
h
testing,
regardless
concentration
employed.
data
fitting
Webber–Morris
model
indicated
two-step
BC,
with
step
being
external
sorption
second
intra-articular
diffusion.
determined
be
endergonic,
satisfactorily
matched
both
Freundlich
Langmuir
models,
qm
0.53
mg·L−1
(T
=
55
°C),
indicating
predominance
physisorption.
findings
suggest
potential
production;
nevertheless,
structure
modifications
necessary
enhance
affinity
subsequently
improve
capacity.
Water Science & Technology Water Supply,
Journal Year:
2024,
Volume and Issue:
24(2), P. 517 - 542
Published: Jan. 24, 2024
Abstract
Southeast
Asia
is
vulnerable
to
climate
change
with
over
half
of
its
population
already
being
impacted
by
drought,
flooding,
and
rise
in
sea
levels
recently.
This
work
reviews
the
current
water
resource
challenges
Indonesia,
prone
rising
impacts
change.
A
baseline
assessment
Indonesia's
drinking
resources
related
original
sources
presented.
In
response
a
growing
concern
chronic
that
undermine
supply
nationwide,
this
study
analyses
safety
supervision.
To
accomplish
this,
literature
survey
(100
studies
published
during
2000–2023
period)
was
performed
identify
regional
groundwater
sustainability
security
issues.
Among
main
findings
study,
only
10%
rainfall
infiltrates
groundwater,
while
70%
rivers
are
heavily
polluted
domestic
waste.
During
period,
availability
decreased
1,200
m3/year
2020,
35%
economically
feasible
for
reuse.
The
deficit
Indonesia
estimated
be
5.5
hm3/year
roughly
67%
population's
demand
satisfied
2021.
Although
might
fulfilled
private
vendors,
supply/demand
forecasts
2030
suggest
gap
could
not
closed
increasing
supply.
Zeitschrift für Physikalische Chemie,
Journal Year:
2024,
Volume and Issue:
238(9), P. 1599 - 1622
Published: Feb. 17, 2024
Abstract
This
study
addresses
the
pressing
issue
of
environmental
pollution
caused
by
antibiotics
and
synthetic
dyes
in
aquatic
ecosystems,
presenting
a
novel
approach
for
their
efficient
photocatalytic
degradation.
Zinc
oxide
(ZnO)-based
nanoscale
photocatalysts,
including
ZnO
nanoparticles
(NPs)
ZnO/Ag
nanocomposite
heterostructure
(NCH),
were
synthesized
through
an
innovative
eco-friendly
method
utilizing
extract
derived
from
discarded
lemon
peels
as
biogenic
reducing
agent.
The
materials
extensively
characterized
UV
spectrophotometry,
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
Fourier
transform
infrared
spectroscopy
(FTIR).
results
confirmed
different
morphologies
NPs
NCH,
with
average
sizes
20
nm
42
nm,
respectively.
Notably,
NCH
exhibited
optical
bandgap
energies
3.2
eV
2.85
eV,
respectively,
signifying
potential
photocatalysts.
Under
natural
sunlight
irradiation,
these
demonstrated
exceptional
activity,
achieving
remarkable
98.8
%
degradation
rate
metronidazole
90
ciprofloxacin
just
12
min.
Furthermore,
effectively
removed
84
Toluidine
Blue
77
Congo
red
after
120
min,
while
enhanced
rates
to
approximately
90.5
86
Red.
research
highlights
significant
physicochemical
properties
synthesis
methods
employed,
positioning
sustainable
nanomaterials
promising
solutions
mitigating
effectively.
