Materials,
Год журнала:
2024,
Номер
17(13), С. 3078 - 3078
Опубликована: Июнь 22, 2024
Spent
coffee
grounds
(SCGs)
have
great
potential
as
a
useful,
value-added
biological
material.
In
this
context,
activated
carbon
(AC)
was
prepared
from
SCGs
by
an
activation
process
using
H3PO4
at
600
°C
in
the
air
and
used
adsorbent
for
azo
dye
AO7,
model
molecule
colorants
found
textile
industry
effluents.
X-ray
diffraction,
SEM
BET
revealed
that
AC
predominantly
amorphous,
consisting
of
powder
20–100
µm
particles
with
mesopores
averaging
5.5
nm
pore
size.
Adsorption
kinetics
followed
pseudo-second-order
law,
while
Langmuir
best
fitted
experimental
isotherm
data
(maximum
capacity
119.5
mg
AO7
per
g).
The
thermodynamic
parameters
adsorption
endothermic
spontaneous.
All
characterizations
indicated
occurred
physisorption
via
mainly
π–π
interactions.
removal
efficiency
optimized
means
Box–Behnken
design
response
surface
methodology
98%
initial
concentration
20
mg·L−1
pH
7.5
dose
0.285
g·L−1
contact
time
40
min.
These
results
clearly
show
can
be
useful
material
efficiently
removing
organic
matter
aqueous
solutions.
Spent
coffee
grounds
(SCG)
have
great
potential
as
a
useful,
value-added
biological
material.
In
this
context,
activated
carbon
(AC)
was
prepared
from
SCG
by
an
activation
process
using
H3PO4
at
600°C
in
air
and
used
adsorbent
for
the
azo
dye
AO7,
model
molecule
colorants
found
textile
industry
effluents.
X-ray
diffraction,
SEM
BET
revealed
that
AC
predominantly
amorphous,
consisting
of
powder
20-100
µm
particles
with
mesopores
averaging
5.5
nm
pore
size.
Adsorption
kinetics
followed
pseudo-second-order
law,
while
Langmuir
best
fitted
experimental
isotherm
data
(maximum
capacity
119.5
mg
AO7
per
g).
Thermodynamic
parameters
adsorption
endothermic
spontaneous.
All
characterizations
indicated
occurred
physisorption
via
mainly
-
interactions.
The
removal
efficiency
optimized
means
Box-Behnken
design
response
surface
methodology
98%
initial
concentration
20
mg.L-1
pH
7.5
dose
0.285
g.L-1
contact
time
40
min.
These
results
clearly
show
can
be
useful
material
efficiently
removing
organic
matter
aqueous
solutions.
Journal of Antimicrobial Chemotherapy,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 13, 2025
Abstract
Objectives
To
evaluate
the
in
vitro
and
vivo
antimicrobial
activity
of
pleuromutilin
derivatives
modified
with
C14
side-chain
against
Streptococcus
suis.
Methods
determine
minimum
inhibitory
concentrations
(MICs)
268
modifications
S.
suis
ATCC
43
765
using
broth
dilution
method.
Derivative
B43,
B49,
B52,
B53
B54,
which
exhibited
better
activity,
were
selected
for
further
investigation
their
antibacterial
effect,
cytotoxicity,
effect.
Results
Determination
five
clinical
strains
(n
=
37),
as
well
growth
time-killing
curves.
Those
experiments
showed
that
all
had
good
vitro.
Resistance-inducing
assays
demonstrated
that,
except
similar
abilities
to
induce
resistance
tiamulin.
In
addition,
did
not
have
erythrocyte
haemolytic
toxicity
(0.25–16
mg/L)
cytotoxicity
(1.25–80
mg/L).
mouse
thigh
infection
model,
derivative
B49
superior
efficacy.
About
40
mg/kg
improved
survival
rate
mice
by
33.3%
peritonitis
model.
Molecular
docking
study
scanning
electron
microscopy
revealed
can
effectively
bind
active
site
50S
ribosome
disrupt
cell
membranes.
Conclusions
A
total
68.66%
potent
Among
them,
effects
suis,
indicating
be
intensively
studied
an
candidate
compound.
Sustainability,
Год журнала:
2025,
Номер
17(11), С. 4816 - 4816
Опубликована: Май 23, 2025
The
use
of
natural
materials
as
adsorbents
and
the
environmentally
friendly
removal
pollutants
azo
dyes
from
water
are
important
topics
today.
goal
this
research
work
was
to
assess
utility
Luffa
cylindrica
(L.
cylindrica)
a
non-conventional
adsorbent
for
in
on
large
scale
(2
L).
An
dye
(AD)
at
concentration
0.250
g/L
removed
solution
rate
63.07%
using
10.0
doses
L.
cylindrica,
maximum
adsorption
capacity
25.25
mg/g.
desorbed
95.8%
AD
0.1
M
NaOH.
Thermodynamically,
occurs
through
pseudo-second-order
kinetics
behaviors
adjust
better
Langmuir
isotherm.
analysis
variance
(p-value
<
0.05)
shows
that
contact
time
significantly
influence
AD.
Few
studies
have
examined
adsorbent.
