Water,
Journal Year:
2023,
Volume and Issue:
15(20), P. 3703 - 3703
Published: Oct. 23, 2023
The
modification
of
pristine
biochar
derived
from
the
waste
sweet
prickly
pear
using
green
method
to
produce
nano-sized
(nanobiochar)
for
removal
steroidal
hormones
and
heavy
metals
water
wastewater
is
reported
in
this
study.
Based
on
characterisation
results
FTIR,
Raman
spectroscopy,
XPS,
material
had
(COOH),
(C=O),
(OH)
functional
groups
typical
graphitic
amorphous
carbon.
SEM-EDS
XRD
showed
that
was
mesoporous
nature.
BET
analysis
revealed
surface
area
significantly
increased
220.1
m2/g
354.6
after
biochar.
TGA-DSC
results,
thermally
stable
up
550
°C.
A
complete
factorial
experimental
design
Minitab
21
Statistical
Software
(version
18.1)
employed
optimise
adsorption
conditions.
F-values
p-values
lack-of-fit
model
acceptability
significance
ANOVA
model.
Freundlich
isotherm
found
provide
a
better
fit
steroid
data
than
Langmuir
isotherm,
with
moderate
values
R2
≥
0.92
0.95
Freundlich,
as
well
maximum
capacities
14.53
mg/g,
10.58
12.50
5.73
5.63
9.75
mg/g
obtained
estriol,
α-oestradiol,
β-oestradiol,
testosterone,
progesterone,
bisphenol
A.
were
lower
metal
adsorption,
8.58
4.15
6.95
nickel,
cadmium,
lead,
respectively.
percentage
effluents
influents
between
84–89%
78–86%
metals,
highest
90–95%
spiked
ultrapure
both
metals.
exhibited
60%
first
four
cycles.
BMC Chemistry,
Journal Year:
2023,
Volume and Issue:
17(1)
Published: Nov. 20, 2023
Water
contamination
has
become
a
global
challenge
to
human
survival.
Non-biodegradable
heavy
metal
cations
and
steroid
hormones
could
accumulate
in
the
body
result
serious
health
problems.
In
this
study,
we
prepared
biochar
from
waste
shells
of
African
star
apples
modified
using
solvent-free
ball
milling
facile
method.
The
X-ray
photoelectron
spectrometer
(XPS)
Fourier
transform
infrared
spectroscopy
(FTIR)
analysis
revealed
functional
groups
C=C,
C-O,
C=O.
Brunauer
Emmett
Teller
(BET)
was
used
determine
surface
area,
area
ball-milled
obtained
at
550
°C
(BASA550)
increased
174
m2/g
304
after
modification.
Langmuir
Freundlich
adsorption
isotherms
best
described
experimental
data
with
RL
<
1
1/n
high
degree
agreement
R2
data;
(R2
=
0.9291-0.9992)
0.9077-0.9974).
kinetic
studies
pseudo-first-order
pseudo-second-order
models
that
model
accurately
process).
application
BASA550
for
treating
wastewater
samples
showed
good
percentage
removal.
removal
cadmium,
nickel,
lead
recorded
as
92.96%,
90.89%,
90.29%,
respectively.
influent
effluent
were
found
be
85.06%,
83.87%,
84.73%,
89.37%,
86.48%,
87.40%,
maximum
ultrapure
water
ranged
84.20
89.63%,
while
spiked
78.91-87.81%
73.58-84.51%
obtained.
reusability
investigated
adsorbent
had
potential
first
four
cycles.
Analytical Methods,
Journal Year:
2022,
Volume and Issue:
14(41), P. 4146 - 4152
Published: Jan. 1, 2022
A
method
for
the
determination
of
15
steroid
hormones
in
farmed
fish
by
liquid
chromatography-orbital
ion
trap
mass
spectrometry
has
been
developed
and
validated.
The
involved
sample
preparation
with
acetonitrile
extraction
clean-up,
separation
LC
using
a
C18
column.
orbital
MS
was
operated
at
resolution
35
000
FWHM
selected
monitoring
mode.
An
source
heated
electrospray
ionization
used
positive
samples
were
prepared
solid-phase
extraction.
limit
quantification
2
μg
kg-1.
Good
linearity
observed
since
correlation
coefficients
more
than
0.99
all
compounds.
Recoveries
spiked
(2
kg-1
20
kg-1)
ranged
from
80.8%
to
112.6%
relative
deviations
less
15%.
successfully
applied
detect
real
level.
Membranes,
Journal Year:
2024,
Volume and Issue:
14(12), P. 250 - 250
Published: Nov. 25, 2024
Trace
organic
contaminants
(TrOCs),
including
pharmaceutically
active
compounds
(PhACs),
present
significant
challenges
for
conventional
water
treatment
processes
and
pose
potential
risks
to
environmental
human
health.
To
address
these
issues,
nanofiltration
(NF)
reverse
osmosis
(RO)
membrane
technologies
have
gained
attention.
This
study
aims
evaluate
the
performance
of
NF
RO
membranes
in
removing
TrOCs
from
wastewater
develop
a
predictive
model
using
Solution
Diffusion
Model.
Experiments
were
conducted
stirred
cell
setup
at
various
target
concentrations,
stirring
speeds,
operating
pressures,
with
acetaminophen
caffeine
selected
as
representative
pharmaceutical
compounds.
The
results
demonstrated
that
most
effectively
removed,
showing
excellent
performance.
exhibited
high
permeate
flux
somewhat
lower
removal
efficiency
(average
84.17%),
while
99.21%),
highlighting
their
importance
trace
treatment.
based
on
solution
diffusion
correlated
well
experimental
data,
suggesting
its
utility
large-scale
system
applications.
confirms
are
effective
wastewater,
offering
promising
posed
by
contaminants.
Water,
Journal Year:
2023,
Volume and Issue:
15(20), P. 3703 - 3703
Published: Oct. 23, 2023
The
modification
of
pristine
biochar
derived
from
the
waste
sweet
prickly
pear
using
green
method
to
produce
nano-sized
(nanobiochar)
for
removal
steroidal
hormones
and
heavy
metals
water
wastewater
is
reported
in
this
study.
Based
on
characterisation
results
FTIR,
Raman
spectroscopy,
XPS,
material
had
(COOH),
(C=O),
(OH)
functional
groups
typical
graphitic
amorphous
carbon.
SEM-EDS
XRD
showed
that
was
mesoporous
nature.
BET
analysis
revealed
surface
area
significantly
increased
220.1
m2/g
354.6
after
biochar.
TGA-DSC
results,
thermally
stable
up
550
°C.
A
complete
factorial
experimental
design
Minitab
21
Statistical
Software
(version
18.1)
employed
optimise
adsorption
conditions.
F-values
p-values
lack-of-fit
model
acceptability
significance
ANOVA
model.
Freundlich
isotherm
found
provide
a
better
fit
steroid
data
than
Langmuir
isotherm,
with
moderate
values
R2
≥
0.92
0.95
Freundlich,
as
well
maximum
capacities
14.53
mg/g,
10.58
12.50
5.73
5.63
9.75
mg/g
obtained
estriol,
α-oestradiol,
β-oestradiol,
testosterone,
progesterone,
bisphenol
A.
were
lower
metal
adsorption,
8.58
4.15
6.95
nickel,
cadmium,
lead,
respectively.
percentage
effluents
influents
between
84–89%
78–86%
metals,
highest
90–95%
spiked
ultrapure
both
metals.
exhibited
60%
first
four
cycles.
