Toxics,
Journal Year:
2023,
Volume and Issue:
11(5), P. 412 - 412
Published: April 26, 2023
To
effectively
carry
out
the
bioremediation
of
a
Pb2+
polluted
environment,
lead-tolerant
strain
named
D1
was
screened
from
activated
sludge
factory
in
Hefei,
and
its
lead
removal
solution
with
concentration
200
mg/L
could
reach
91%
under
optimal
culture
conditions.
Morphological
observation
16S
rRNA
gene
sequencing
were
used
to
identify
accurately,
cultural
characteristics
mechanism
also
preliminarily
studied.
The
results
showed
that
identified
as
Sphingobacterium
mizutaii
strain.
experiments
conducted
via
orthogonal
test
conditions
for
growth
pH
7,
inoculum
volume
6%,
35
°C,
rotational
speed
150
r/min.
According
scanning
electron
microscopy
energy
spectrum
analysis
before
after
exposure
lead,
it
is
believed
surface
adsorption.
Fourier
transform
infrared
spectroscopy
(FTIR)
revealed
multiple
functional
groups
on
bacterial
cells
are
involved
Pb
adsorption
process.
In
conclusion,
has
excellent
application
prospects
lead-contaminated
environments.
Environmental Technology & Innovation,
Journal Year:
2024,
Volume and Issue:
34, P. 103560 - 103560
Published: Feb. 1, 2024
Amorphous
nanometer
alumina
(nano-Al2O3)
was
prepared
by
inverse
microemulsion
method
in
the
presence
of
aluminum
sulfate
octadecahydrate
as
source,
poly(ethylene
glycol)
octyl-phenyl
ether
and
cetyl
trimethyl
ammonium
bromide
emulsifiers,
n-butanol
co-surfactant.
The
optimal
condition
for
preparing
nano-Al2O3
investigated
relation
to
effect
stirring
rate
on
morphology
adsorption
performance
product;
capacity
mechanism
AsO43-
ion
aqueous
solution
were
explored
based
simulations
with
conventional
isothermal
models.
Findings
indicate
that
absence
emulsifiers
co-surfactant
exhibits
a
high
149.76
mg·g-1
towards
ion,
higher
than
reported
literature.
is
dependent
pH
value
temperature
well
coexisting
ions;
maximum
occurs
at
6.
Moreover,
obeys
Langmuir
model
pseudo-second-order
kinetic
equation,
referring
monolayer
chemical
adsorption.
process
governed
both
membrane
diffusion
internal
diffusion;
dominated
diffusion.
In
summary,
has
strong
stability
could
be
promising
nano-adsorbent
removing
heavy
metal
like
therefrom.
Molecules,
Journal Year:
2023,
Volume and Issue:
28(5), P. 2292 - 2292
Published: March 1, 2023
Cadmium
(Cd)
and
lead
(Pb)
are
global
environmental
pollutants.
In
this
study,
Nostoc
sp.
MK-11
was
used
as
an
environmentally
safe,
economical,
efficient
biosorbent
for
the
removal
of
Cd
Pb
ions
from
synthetic
aqueous
solutions.
identified
on
a
morphological
molecular
basis
using
light
microscopic,
16S
rRNA
sequences
phylogenetic
analysis.
Batch
experiments
were
performed
to
determine
most
significant
factors
solutions
dry
MK1
biomass.
The
results
indicated
that
maximum
biosorption
found
under
conditions
1
g
biomass,
100
mg/L
initial
metal
concentrations,
60
min
contact
time
at
pH
4
5
Cd,
respectively.
Dry
biomass
samples
before
after
characterized
FTIR
SEM.
A
kinetic
study
showed
pseudo
second
order
model
well
fitted
rather
than
first
order.
Three
isotherm
models
Freundlich,
Langmuir,
Temkin
explain
isotherms
by
Langmuir
isotherm,
which
explains
existence
monolayer
adsorption,
process.
Considering
model,
capacity
(qmax)
calculated
75.757
83.963
mg
g-1
Pb,
respectively,
agreement
with
obtained
experimental
values.
Desorption
investigations
carried
out
evaluate
reusability
recovery
ions.
It
desorption
above
90%.
proven
be
cost-effective
removing
especially
solutions,
process
is
eco-friendly,
feasible,
reliable.
