Textile dye removal using diatomite nanocomposites: a metagenomic study in photosynthetic microalgae-assisted microbial fuel cells
RSC Advances,
Год журнала:
2025,
Номер
15(11), С. 8300 - 8314
Опубликована: Янв. 1, 2025
In
this
study,
Coomassie
brilliant
blue
(CBB),
green
(BG),
and
rhodamine
(Rh)
dyes
were
used
to
simulate
dye-rich
wastewater.
Adsorption
degradation
of
these
(2
μM,
10
30
μM)
on
diatomite
(DE)
evaluated
under
light
(L)
dark
(D)
conditions.
The
adsorption
dye-DE
composites
followed
pseudo-second-order
kinetics
at
all
concentrations
conditions
had
R
2
>
0.99,
thus
showing
a
good
fit.
calculated
equilibrium
amount
q
e,(cal)
was
coherent
with
the
value
experimental
e,(exp).
poorest
photocatalysis
occurred
prompting
functionalization
TiO2
Fe3O4
nanoparticles
(NP(s)).
highest
dye
efficiencies
(DGeff)
for
μM
86.79%
(CBB-DE-Fe3O4,
72
h),
96.10%
(BG-DE-TiO2,
52
81.74%
(Rh-DE-TiO2,
48
Rh-DE-TiO2
fastest
degradation.
Functionalized
DE-dye
(30
nanocomposites
further
tested
in
photosynthetic
microalgae-assisted
microbial
fuel
cell
dye-simulated
wastewater
anode
(PMA-MFC-1
CBB-DE-Fe3O4,
PMA-MFC-2
BG-DE-TiO2
PMA-MFC-3
Rh-DE-TiO2)
Asterarcys
sp.
GA4
microalgae
cathode.
chambers,
achieved
DGeff
Rh
as
88.23%
polarization
density
30.06
mW
m-2,
outperforming
BG
PMA-MFC-1
CBB
dye.
molecular
identifier
analysis
microbes
showed
dominance
Sphingobacteria
Proteobacteria
(Rh-DE-TiO2)
COD
removal
61.36%,
highlighting
its
potential
efficient
bioelectricity
generation.
Furthermore,
simultaneously
demonstrated
superior
microalgal
lipid
yield
3.42
μg
g-1
an
algal
growth
8.19
Язык: Английский
Valorization of spent tea waste for generation of cellulose microfibers using cellulases and hemicellulases of Aspergillus niger
Biomass Conversion and Biorefinery,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 17, 2025
Язык: Английский
Exploring the Feasibility of Using Spent Rooibos Tea Waste-Derived Activated Carbon for Supercapacitor Applications
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 2, 2024
Abstract
The
global
drive
towards
sustainable
and
environmentally
friendly
energy
solutions
has
led
to
increased
interest
in
the
development
of
efficient
storage
devices.
In
this
context,
utilization
waste
materials
as
precursors
for
activated
carbon
(AC)
production
garnered
substantial
attention.
This
study
investigates
feasibility
using
spent
Rooibos
tea
(SRTW),
a
hitherto
unexplored
precursor,
synthesize
AC
supercapacitor
applications.
preparation
was
optimized
by
Taguchi
method.
sample
generated
under
optimum
conditions
(700
℃,
75
min,
2
g/g,
activation
temperature,
time
ratio)
designated
2AC700-75,
subjected
morphological
analysis
field
emission
scanning
electron
microscope
(FESEM)
which
reveal
porous
nature
prepared
AC.
Concurrently,
Fourier
transform
infrared
spectroscopy
(FT-IR)
elucidated
presence
carbonaceous
functional
groups.
Cyclic
voltammetry
(CV)
analyses,
employed
determining
electric
double
layer
capacitance
(EDLC)
6
M
potassium
hydroxide
(KOH)
electrolytic
medium.
Electrochemical
impedance
(EIS)
Nyquist
plot,
revealing
charge
transfer
resistance
value
(Rct)
11.36
Ω.
Furthermore,
galvanostatic
charge-discharge
(GCD)
determined
specific
(Sc)
values
109.16
210
F/g
at
0.5
A/g
two
three
electrode
system,
respectively.
Remarkably,
it
exhibited
excellent
cycling
stability,
retaining
99.99%
its
maintaining
100%
coulombic
efficiency
after
5000
cycles
current
density
A
g
−
1.
symmetric
coin
cell
with
KOH
solution,
2AC700-75
electrodes
exemplary
EDLC
behavior,
featuring
an
15.16
W
h
kg
−
1
power
999.2
findings
illuminate
promising
future
waste-to-energy
conversion
critical
role
clean
landscape.
Язык: Английский
Exploring the feasibility of using spent rooibos (Aspalathus linearis) tea waste–derived activated carbon for supercapacitor applications
Ionics,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 19, 2024
Язык: Английский
Synthesis, Characterisation Of Agricultural Biomass Derived Activated Carbon And Its Applications
Materials Research Express,
Год журнала:
2024,
Номер
12(1), С. 012001 - 012001
Опубликована: Дек. 20, 2024
Abstract
As
the
world
moves
toward
greener
energy
generation
methods
and
cleaner
environments,
activated
carbon
produced
from
ligninocellulosic
resources
has
attracted
unexpected
interest
due
to
its
easy
availability,
economic,
renewable,
biodegradable
properties,
which
makes
it
a
viable
alternative
exhaustible
coal.
This
review
paper
provides
comprehensive
overview
of
systematic
procedure
develop
plant
biomass,
characterization
by
simple
techniques,
versatile
applications
carbon.
includes
role
in
environmental
remediation,
emphasizing
efficacy
removing
wide
array
pollutants,
sustainable
hydrogen
capture
storage
supercapacitors.
A
brief
comparison
key
aspects
optimal
toxicant
adsorption,
like
batch
conditions,
best-fit
model,
isotherms,
maximum
are
also
made.
To
ascertain
efficiency
supercapacitors,
their
strategy
designing
it,
output
terms
specific
capacitance,
power,
density
compared.
Язык: Английский