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.
Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(17), P. 7623 - 7623
Published: Aug. 28, 2024
Copper
contamination
of
natural
waters
is
a
global
problem
that
affects
ecosystems
and
public
health,
yet
this
metal
an
essential
micronutrient
has
important
applications.
The
efficacy
Staphylococcus
epidermidis
CECT
4183
as
Cu(II)
biosorbent
in
synthetic
solutions
its
potential
ability
to
synthesize
CuO
nanoparticles
(CuO-NPs)
from
cellular
extract
was
investigated.
In
addition,
the
biocidal
evaluated
against
five
microorganisms.
Using
response
surface
methodology,
optimal
operating
conditions
were
determined
be
biomass
dose,
0.2
g/L,
pH
5.5.
Equilibrium
tests
performed,
biosorption
isotherms
obtained
for
four
models
with
maximum
capacity
48.14
mg/g
Langmuir
model.
Different
spectroscopic
microscopic
techniques
used
determine
mechanisms
involved
process,
which
dominated
by
physicochemical
interactions
strong
involvement
methyl,
methylene,
carbonyl,
amino,
phosphate
groups.
also
allowed
characterizing
nanoparticles,
had
quasi-spherical
morphology
average
size
14
nm.
Finally,
showed
CuO-NPs
good
inhibitory
microorganisms
tested,
minimum
concentrations
(MIC)
between
62.5
500
µg/mL
bacteria
1000
2000
yeasts.
S.
bioremediation
synthesis
capacity.
use
biosorption,
cell
presented
high
green
CuO-NPs,
at
same
time
turned
out
agents.
Microorganisms,
Journal Year:
2022,
Volume and Issue:
10(12), P. 2510 - 2510
Published: Dec. 19, 2022
Heavy
metals
are
considered
as
dangerous
pollutants
even
in
relatively
low
concentrations.
Biosorption
is
an
ecofriendly
technology
that
uses
microbial
biomasses
for
adsorbing
heavy
from
wastewater
on
their
surfaces
based
physicochemical
pathways.
Ten
agricultural
samples
were
collected
different
sites
Sohag
Governorate,
Egypt.
One
hundred
and
nineteen
zinc
cadmium-resistant
bacterial
isolates
recovered
the
water
samples.
Interestingly,
isolate
R1
was
selected
most
resistant
to
Zn2+
Cd2+.
This
morphologically
biochemically
characterized
identified
by
sequencing
of
16S
rRNA
gene
Priestia
megaterium,
then
deposited
GenBank
database
under
accession
number
PRJNA526404.
Studying
effects
pH
contact
time
biosorption
process
revealed
maximum
achieved
within
50
min
at
7
8
Cd2+,
respectively,
living
lyophelized
biomass
megaterium
The
preliminary
characterization
main
chemical
groups
present
cell
wall,
which
responsible
metal
biosorption,
performed
Infrared
analysis
(IR).
Kinetics
studies
data
fitted
towards
models
hypothesized
Langmuir
Freundlich
isotherm
equations.
capacity
values
(qmax)
cadmium
reached
using
196.08;
227.27
178.57;
212.777
mg/g,
it
indicated
lyophilization
improved
efficiency
compared
cells.
results
PRJNA526404
had
good
application
prospect
remediation.
Journal of Materials Research and Technology,
Journal Year:
2023,
Volume and Issue:
27, P. 6900 - 6911
Published: Nov. 1, 2023
The
decrease
in
the
total
iron
grade
of
pellets
due
to
bentonite
has
prompted
search
for
a
non-polluting
and
alternative
binder.
while
organic
binders
are
considered
potential
substitutes
bentonite,
they
cannot
fully
replace
it
complete
decomposition
failure
during
pellet
hardening.
Thus,
production
utilizing
composite
binder
gained
significant
attention
academia
industry.
In
this
study,
novel
polymer-type
(PTB)
was
introduced
minimize
consumption
green
preparation.
By
regulating
ratio,
addition
just
0.01
%
PTB
can
reduce
usage
by
1.0
under
optimal
conditions,
all
maintaining
excellent
quality.
Further
investigations
revealed
that
molecules
adsorbed
on
surfaces
concentrate
(predominantly
magnetite)
through
hydrogen
bonding,
electrostatic
repulsion,
coordination,
monodentate
chelation
surface
complexation,
dissolved
into
fibrous
structure
bridge
particles
together.
Moreover,
abundant
hydrophilic
groups
(-OH,
–COOH)
substantially
enhanced
water-holding
capacity
pellets,
resulting
reduced
rate
drying
dehydration
an
elevated
shock
temperature.
This
comprehensive
study
provides
valuable
scientific
insights
development
application
binders.
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.
