Biosorption of Hexavalent Chromium by Bacillus megaterium and Rhodotorula sp. Inactivated Biomass
Processes,
Journal Year:
2023,
Volume and Issue:
11(1), P. 179 - 179
Published: Jan. 6, 2023
Due
to
the
adverse
effects
of
hexavalent
chromium
(Cr6+)
on
human
health
and
quality
environment,
scientific
community
has
invested
a
lot
effort
solve
this
pollution
problem.
Thus,
implementing
sustainable
alternatives
for
Cr6+
elimination
by
exploiting
capacity
microbial
biomass
retain
heavy
metals
biosorption
is
considered
an
economic
eco-friendly
solution,
compared
conventional
physico-chemical
processes.
However,
ability
microorganisms
remove
from
liquid
effluents
can
strongly
be
affected
biotic
abiotic
factors.
With
these
issues
in
mind,
main
purpose
paper
was
investigate
Bacillus
megaterium
Rhodotorula
sp.
inactivated
thermal
treatments,
exploring
some
factors
such
as:
pH,
biosorbent
dose,
initial
concentration
metal
temperature
contact
time
between
ions
process
effectiveness.
The
results
showed
that
removal
selected
influenced
pH
solution
which
contains
chromium,
reduction
being
principal
mechanism
involved
biosorption.
Equilibrium
kinetic
studies
were
also
performed,
together
with
SEM-EDX
FTIR
spectra,
explain
mechanisms
biomasses.
Maximum
uptake
capacities
34.80
mg/g
47.70
achieved
sp.,
respectively,
at
1,
dosage
8
g/L,
25
°C,
after
48
h
402.52
mg/L.
experimental
followed
Elovich
model,
values
correlation
coefficients
0.9868
0.9887,
respectively.
Freundlich
isotherm
model
best
describes
indicating
multilayer
mainly
controls
conducted
heterogeneous
surfaces
uniformly
distributed
energy.
Language: Английский
Bio-Recovery of Metals through Biomining within Circularity-Based Solutions
Processes,
Journal Year:
2024,
Volume and Issue:
12(9), P. 1793 - 1793
Published: Aug. 23, 2024
Given
the
current
highest
demand
in
history
for
raw
materials,
there
is
a
growing
recovery
of
key
metals
from
secondary
sources,
order
to
prevent
metal
depletion
and
reduce
risk
toxic
discharges
into
environment.
This
paper
focuses
on
nature-based
solutions
(i.e.,
biomining
bioleaching)
applied
resource
(metals)
solid
matrices.
Biomining
exploits
potential
microorganisms
facilitate
extraction
wide
range
waste
materials
as
an
interesting
alternative,
replacing
primary
with
material
resources
(thus
improving
recycling
rates
context
circular
economy).
Special
attention
was
paid
analysis
process
sustainability
perspective.
In
this
regard,
several
supporting
tools
(e.g.,
life
cycle
assessment,
LCA),
developed
assist
decision-makers
complex
assessing
scaling-up
remediation
projects
(including
biomining),
were
discussed.
The
application
LCA
still
evolving,
requires
comprehensive
case
studies
improve
methodological
approach.
review
outlines
fact
that
few
have
focused
demonstrating
environmental
performance
process.
Also,
further
should
be
performed
promote
commercial
opportunities
biomining,
which
can
used
recover
recycle
matrices
site
remediation.
Despite
some
important
disadvantages
(poor
kinetics;
toxicity),
considered
cleaner
approach
than
conventional
mining
processes.
However,
implementing
it
large
scale
improvements
regulatory
issues
public
acceptance.
Language: Английский
Mathematical Modeling of Microbial Bioremediation
Advances in environmental engineering and green technologies book series,
Journal Year:
2024,
Volume and Issue:
unknown, P. 100 - 134
Published: March 11, 2024
Biosorption
is
a
method
that
holds
great
promise
for
environmental
bioremediation.
However,
the
process
mechanism
not
yet
fully
comprehended
as
it
relies
heavily
on
characteristics
of
biosorbent,
properties
pollutants,
and
operational
conditions.
The
knowledge
understanding
sorption
kinetics
mechanisms
are
critical
design
scaling
up
biosorption.
Applying
proper
models
methods
in
evaluation
heavy
metals
biosorption
can
elucidate
mechanisms,
analyze
experimental
data,
predict
outcomes,
optimize
processes.
After
brief
analysis
literature
field
biosorption,
has
been
found
most
valuable
provide
information
about
kinetics,
maximum
capacity
thermodynamics.
Additionally,
preferred
studying
interactive
effects
variables
creating
precise
mathematical
model
describes
accurately
highly
sought
after.
Thus,
main
purpose
chapter
consists
exposing
available
be
applied
all
factors
could
affect
metals.
isotherms,
kinetic
thermodynamic
models,
well
statistical
tools
suitable
evaluating
were
presented,
with
special
emphasis
their
application,
advantages,
disadvantages.
Language: Английский
Comparative Analysis of Three WEEE Management Scenarios Based on LCA Methodology: Case Study in the Municipality of Iasi, Romania
Processes,
Journal Year:
2023,
Volume and Issue:
11(5), P. 1305 - 1305
Published: April 23, 2023
The
increasing
consumption
of
electrical
and
electronic
equipment
(EEE),
correlated
with
the
fast
innovation
pace
in
this
field,
generates
a
large
amount
annual
waste.
current
established
management
practices
cannot
keep
up
it,
results
are
increased
significance
given
negative
effects
on
environment
human
health.
Thus,
study
aimed
to
analyze
environmental
impact
three
different
scenarios
waste
(WEEE)
management,
following
population
awareness
campaigns
regarding
its
collection
Municipality
Iasi,
Romania.
Data
processing
was
carried
out
considering
Life
Cycle
Assessment
(LCA)
methodology
functional
unit
for
each
scenario
according
collected
amount.
were
quantified
using
CML2001
ReCiPe
methods
showed
that
highest
obtained
II
(S2)
(1.59
×
10−7
pers.
equiv.
method
32.7
method),
while
lowest
I
(S1)
(6.42
10−8
13.8
method).
process
contribution
total
stage
all
scenarios,
exception
S2,
which
case
value
generated
landfill
application
(39.93%).
provides
critical
issue
area
supports
development
sustainable
WEEE
processes.
Language: Английский
Exploring the microbial dynamics for heavy metals bioremediation in the industrial wastewater treatment: A critical review
H Malathi,
No information about this author
Pooja Sharma
No information about this author
Novel Research in Microbiology Journal,
Journal Year:
2023,
Volume and Issue:
7(4), P. 2034 - 2047
Published: July 1, 2023
The
purpose
of
this
review
article
was
to
provide
a
concise
overview
the
current
researches
on
topic
in-situ
microbial
remediation
heavy
metals
(HM)
in
industrial
wastewater.
Due
ever-expanding
sector;
groundwater
contamination
by
HM
is
global
environmental
crisis.
Heavy
metals;
pollution,
and
adaptive
mechanisms
that
allow
bacteria
thrive
metal-contaminated
environments,
have
all
been
linked
dramatic
shifts
diversity,
which
are
observed
during
restoration.
It
has
suggested
situ
bioremediation
(ISB)
can
help
with
emerging
problems;
as
be
used
clean
up
polluted
areas.
In
future,
researchers
should
pay
more
attention
assessment
methodologies
for
determining
success
using
ISB
technology.
Bio-remediation
only
effective
if
area
properly
characterized;
appropriate
species
chosen,
harmful
easily
accessible
absorption.
This
new
technology
uses
remove
from
environment
at
low
cost.
study
analyzes
effectiveness
microorganisms;
unique
integrated
methods.
addition
providing
an
pollutant(s)
elimination;
useful
comprehending
primary
functions
microorganisms
process.
Language: Английский
Exploring Aspergillus biomass for fast and effective Direct Black 22-dye removal
Revista Brasileira de Ciências Ambientais,
Journal Year:
2024,
Volume and Issue:
59
Published: Nov. 5, 2024
Azo
dyes
are
widely
used
in
the
textile
industry
due
to
their
stability
and
resistance.
These
properties
also
make
them
recalcitrant
xenobiotics,
toxic,
mutagenic,
carcinogenic,
even
at
low
concentrations.
Considered
emerging
pollutants,
there
is
an
urgency
address
mechanisms
capable
of
remediating
these
contaminants,
with
Aspergillus
fungi
standing
out
as
effective
solution.
Fifteen
strains
were
investigated
for
decolorization
tetra
azo
dye
Direct
Black
22.
The
influence
different
culture
media
was
evaluated
on
biomass
production,
concentrations
(50–300
mg/L),
(1–5g),
reuse
continuous
batches.
that
stood
most
japonicus
URM
5620,
niger
5741,
A.
5838.
Obtaining
less
nutrient-rich
medium
favored
by
forming
more
organized
pellets.
live
59%
efficient
than
dead
biomass.
efficiency
not
affected
lower
concentrations,
showing
a
decrease
only
when
concentration
reached
300
mg/L.
Increasing
amount
resulted
proportionally
greater
decolorization.
Even
just
1
g
biomass,
three
could
remove
90%
60
minutes,
5
g,
completely
removed
10
minutes.
Thebiomass
reused
consecutive
cycles,
fungus
best
withstood
cycles
5741.
results
demonstrate
potential
genus
tested
this
study
sustainable
biosorbents
remediation
such
22,
colored
industrial
effluent
treatment.
Language: Английский