Synthetic
colorants
are
widely
used
globally
by
different
industries
for
the
dyeing
process.
However,
these
chemicals
pollute
environment
and
affect
human
health
causing
allergies,
hives,
dermatitis,
cancer.
This
study
aims
to
compare
effectiveness
of
duckweed
(Lemna
minor)
in
removal
Methylene
Blue
(MB)
Congo
red
(CR)
dyes
at
concentrations
(1
mg/L,
5
10
15
mg/L).
Absorbance
values
were
determined
665
nm
MB
497
CR
after
96
hours.
The
results
show
higher
compared
all
(95.49
%
vs.
59.32%,
1
mg/L;
97.24%
39.43%,
5mg/L;
91.30%
vs
28.47%,
10mg/L;
y
85.42%
20.27%,
15mg/L).
was
observed
30
min
contact
with
duckweed,
while
24
hours
concentrations.
AQUA - Water Infrastructure Ecosystems and Society,
Год журнала:
2024,
Номер
73(6), С. 1228 - 1256
Опубликована: Май 10, 2024
ABSTRACT
Wastewater
from
industries
contributes
significantly
to
pollution.
Adsorption
of
acidic
dye
using
nanohybrid
biopolymeric
hydrogels
has
evolved
as
one
the
viable
techniques.
Graphene
oxide
(GO)/chitosan
(CS)–polyvinyl
alcohol
(PVA),
GO/starch–PVA,
and
GO/agar–PVA
were
synthesized.
The
results
revealed
that
following
are
ideal
values:
GO/CS–PVA:
3
pH
(8.251
mg
g−1),
0.05
g/50mL
dosage
90
min
12
ppm
concentration
30
°C
g−1);
for
GO/starch–PVA:
2
(7.437
g/50
mL
GO/agar–PVA;
(6.142
g−1).
GO/CS–PVA
outperformed
other
hydrogels.
Langmuir
model
suited
data,
while
GO/starch–PVA
followed
Freundlich
isotherm
models.
adsorption
capacity
data
a
pseudo-second-order
model.
Negative
value
Gibbs
free
energy
enthalpy
showed
reactions
spontaneous
exothermic
in
nature.
presence
heavy
metals,
electrolytes,
detergents/surfactants
affected
adsorption.
Entropy
changes
positive
values
implied
randomness
at
solid/solution
contact.
desorption
(60,
55,
58%)
GO/CS–PVA,
was
obtained
0.5
N
NaOH.
Scanning
electron
microscope,
X-ray
diffraction,
Fourier
transform
infrared
(FT-IR)
used
characterization.
AQUA - Water Infrastructure Ecosystems and Society,
Год журнала:
2024,
Номер
73(9), С. 1946 - 1975
Опубликована: Сен. 1, 2024
ABSTRACT
The
sustainable
wastewater
treatment
method
known
as
phytoremediation
is
reviewed
in
this
paper,
with
particular
attention
paid
to
important
technologies
including
phytoextraction,
rhizofiltration,
phytostabilization,
phytodegradation,
and
phytovolatilization.
study
emphasizes
the
effectiveness
of
phytoextraction
for
heavy
metal
contamination
using
hyperaccumulator
plants.
It
also
highlights
versatility
by
presenting
compelling
case
examples
various
situations.
This
environmentally
friendly
strategy
offers
affordable
answers
worldwide
water
pollution
challenge
accordance
growing
demand
aware
techniques.
Phytoremediation
–
which
methods
like
becomes
a
more
viable
path
forward
mitigation
environmental
stewardship
advances.
By
fusing
theoretical
understanding
real-world
implementations,
article
advances
conversation
on
while
reinforcing
phytoremediation's
promise
future.
International Journal of Environmental & Analytical Chemistry,
Год журнала:
2024,
Номер
unknown, С. 1 - 43
Опубликована: Ноя. 6, 2024
The
synthesis
of
zinc
oxide
(ZnO)
nanoparticles
using
Pueraria
montana
(kudzu)
plant
extracts
highlights
advancements
in
green
nanotechnology.
This
study
explores
the
use
roots,
rich
phytochemicals
such
as
phenols,
terpenoids
and
flavonoids,
which
serve
natural
reducing
stabilizing
agents
for
nanoparticle
synthesis.
eco-friendly
production
surface
modification
ZnO
were
achieved
these
extracts,
enhancing
their
photocatalytic
performance
with
trisodium
pyrophosphate
(TSPP).Characterization
techniques,
including
XRD,
TEM,
FE-SEM,
confirmed
nanoparticles'
crystalline
structure,
a
BET
area
14.01
m²/g
type
II
adsorption
isotherm.
synthesized
exhibited
exceptional
dye
degradation
capabilities,
achieving
99.9%
removal
malachite
(MG)
97.78%
aniline
blue
(AB).
Kinetic
analysis
revealed
steady-state
rate
constant
(k)
2
×
10⁻⁴
min⁻¹
MG
where
response
constant(k)
AB
modified
nanostructures
was
3.0
10−3
min−1
allowing
near-total
within
600
minutes
350
min
.
Adsorption
studies
well
described
by
Langmuir
Freundlich
isotherms,
indicating
maximum
capacities
59.7
mg/g
61.2
AB.
Surface
TSPP
improved
charge
carrier
separation
enhanced
generation
reactive
oxygen
species
under
UV
exposure,
further
increasing
efficiency.Statistical
indicated
high
reproducibility,
close
mean
values
99.125
97.3125
AB,
supported
small
standard
deviations.
findings
affirm
potential
synthesizing
efficient
photocatalysts,
providing
sustainable
cost-effective
approach
water
treatment
applications.
Overall,
this
research
underscores
effectiveness
plant-based
materials
advancing
nanotechnology
solutions.
Global NEST Journal,
Год журнала:
2024,
Номер
unknown, С. 1 - 13
Опубликована: Апрель 25, 2024
<p>Purpose:
This
study
investigates
the
efficacy
of
electrochemical
remediation
techniques
in
treating
hospital
wastewater,
focusing
on
parameters
including
turbidity,
color,
BOD,
COD,
DO,
coliform,
and
E.
coli.
Design/Methodology/Approach:
The
conducts
a
comprehensive
analysis
various
pollutant
parameters,
evaluating
impact
contact
time
reduction.
Electrochemical
methods
are
explored
for
their
potential
mitigating
these
parameters.
Conclusions:
findings
demonstrate
effectiveness
reducing
range
with
significant
reductions
observed
turbidity
(up
to
99%),
color
(51%),
BOD
(99%),
COD
(60%),
microbial
contaminants
such
as
coli
coliform
48%).
Notably,
reveals
that
higher
voltage
doesn't
consistently
result
superior
performance.
Limitations/Consequences
Research:
While
showcases
promising
results,
certain
limitations
challenges
acknowledged,
need
further
research
address
constraints
optimize
processes.
Practical
Value:
highlights
practical
an
effective
means
wastewater
treatment
settings,
offering
insights
into
application
benefits
environmental
sustainability.
Originality
Significance
Results:
contributes
novel
treatment,
emphasizing
providing
foundation
future
directions
this
field.</p>
