Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi,
Journal Year:
2022,
Volume and Issue:
27(2), P. 269 - 285
Published: May 10, 2022
Eosin
sarısı
(ES)
genellikle
hem
insan
sağlığı
de
çevre
için
toksik
bir
boyadır.
Bu
çalışmada
Aloe
vera
destekli
gümüş
(Ag/AV)
katalizörü
sodyum
borohidrür
(NaBH4)
indirgeme
yöntemi
ile
sentezlenmiştir.
Sentezlenen
malzeme,
anyonik
boya
olan
ES’nin
renk
gideriminde
potansiyel
katalizör
olarak
kullanılmıştır.
Başlangıç
ES
konsantrasyonu
(Co),
zaman
ve
miktarı,
NaBH4
varlığında
giderimi
üzerindeki
etkileri
araştırıldı
proses
koşulları,
cevap
yüzey
(response
surface
methodology
–
RSM)
kullanılarak
optimize
edildi.
Optimizasyon
analizinden,
10.96
mg/L
Co,
73.50
s
süre
0.78
mg/mL
miktarında
%84.99’luk
maksimum
renksizleştirme
verimliliği
elde
Ayrıca,
kinetik
çalışmalar,
Ag/AV
üzerinde
renksizleştirmesinin,
yalancı
ikinci
dereceden
modeli
takip
ettiğini
göstermiştir.
Termodinamik
giderme
işleminin
ekzotermik
kendiliğinden
olduğunu
Sonuç
hazırlanan
katalizörün
gibi
organik
kirleticilerin
renksizleştirilmesinde
verimli
şekilde
kullanılabileceği
sonucuna
varılabilir.
MethodsX,
Journal Year:
2022,
Volume and Issue:
10, P. 101951 - 101951
Published: Dec. 2, 2022
A
new
configuration
of
aluminum
electrodes
has
been
performed
in
an
electrocoagulation
reactor
(ECR)
to
remove
toxic
metals
from
synthetic
wastewater.
The
ECR
contains
four
concentric-cubic
that
were
connected
the
DC
power
supply
with
a
bipolar
mode.
ability
this
eliminate
200
ppm
Pb,
Cd
and
Cu
wastewater
was
investigated
under
effect
pH
(4-10),
applied
current
(0.2-2.6
A),
reaction
time
(4-60
min).
Two
grams
NaCl
added
each
experiment
enhance
electrical
conductivity
minimize
passivation
cathode
surfaces.
experiments,
analysis,
optimization
conducted
using
response
surface
methodology
type
Box-Behnken
design
(RSM-BBD)
Minitab-statistical
software
program.
highest
elimination
heavy
was:
Pb-99.73%,
Cd-98.54%,
Cu-98.92%
at
10,
1.4
current,
60
min
time.
total
real
consumption
anodes
these
conditions
0.55
g,
energy
12.71
kWh/m3.
All
reactions
metal
removal
occurred
present
EC
obey
kinetic
first-order
reaction.
Thermodynamics
parameters
indicate
endothermic,
spontaneous
nature,
random
irregularity
liquid-solid
interaction.
values
efficiencies
considerably
lowest
electrode
proved
technology
applies
treatment
containing
metals.•The
anode
perforated
decrease
amount
consumption,
while
not
perforated.•The
eliminated
mg/l
A,
min.
Moreover,
significantly
low.•The
performance
indicator
(R2)
studied
responses
higher
than
0.95.
Desalination and Water Treatment,
Journal Year:
2024,
Volume and Issue:
317, P. 100045 - 100045
Published: Jan. 1, 2024
This
study
investigates
the
efficacy
of
pomegranate
peel
powders,
specifically
raw
peels
(RPA),
hydrochloric
acid-modified
(APA),
and
sodium
hydroxide-modified
(BPA)
variants,
as
adsorbents
for
boron
removal
from
aqueous
solutions.
Fourier-transform
infrared
(FTIR)
analysis
was
employed
to
identify
functional
groups
involved
in
adsorption
process,
while
field
emission
scanning
electron
microscopy
(FESEM)
utilized
examine
surface
morphology
adsorbents.
Batch
experiments
optimized
parameters
such
pH,
adsorbent
dose,
initial
concentration,
contact
time,
temperature.
The
optimal
pH
6,
with
maximum
efficiencies
42%,
69.3%,
67.26%
RPA,
APA,
BPA,
respectively.
Adsorption
capacity
increased
higher
doses
Langmuir
model
describes
isotherm
well,
kinetics
were
adequately
described
by
sequential
fitting
Elovich
pseudo-first-order
models.
Thermodynamic
(ΔS°,
ΔG°,
ΔH°)
examined
during
adsorption.
A
positive
entropy
change
(∆S)
indicated
disorder.
All
(RPA,
BPA)
favoured
boron,
APA
BPA
showing
a
stronger
affinity
than
RPA.
endothermic
non-spontaneous,
necessitating
external
energy.
underscores
economical
reliable
nature
effective
repetitive
ion
removal,
emphasizing
their
potential
sustainable
water
treatment
International Journal of Environmental Research and Public Health,
Journal Year:
2022,
Volume and Issue:
19(3), P. 1555 - 1555
Published: Jan. 29, 2022
Using
tobacco
waste
as
raw
material,
the
ultrasonic-assisted
extraction
of
chlorogenic
acid
was
optimized
by
response
surface
methodology
(RSM).
After
repeated
freezing
and
thawing
twice,
effect
pH
value,
ethanol
volume
fraction,
temperature
time
on
rate
investigated
a
single
factor
experiment.
On
basis
this,
factors
affecting
yield
were
further
using
RSM.
The
optimum
conditions
for
set
at
=
4.1,
fraction
49.57%
2.06
h.
Under
above
conditions,
could
reach
0.502%,
which
higher
than
traditional
unpretreated
ultrasonic
extraction.
All
these
results
can
be
used
reference
effective
ingredients
in
waste.
