Process Safety and Environmental Protection,
Год журнала:
2023,
Номер
192, С. 546 - 555
Опубликована: Март 9, 2023
Sorption
is
here
proposed
as
a
promising
approach
for
metal
pre-concentration
and
recovery
from
wastewater.
A
study
was
carried
out
on
the
simultaneous
sorption
of
Co2+,
Cu2+,
Ni2+
Zn2+
macroalgae,
microalgae
cyanobacteria.
The
effect
pH,
initial
concentration,
competition
time
contact
were
evaluated.
Metal
hampers
at
studied
concentration
ranges.
counterion
(sulfate,
chloride
or
acetate)
did
not
influence
sorption.
brown
algae
Sargassum
sp.
most
sorbent
(qmax
=
0.66
±
0.03
mmol·g−1),
followed
by
Phaeodactylum
tricornutum
0.36
0.02
mmol·g−1)
cyanobacteria
Spirulina
0.216
0.007
mmol·g−1).
All
biomass
samples
showed
preferential
Cu2+.
experimental
kinetic
data
well
described
Ho's
model,
showing
chemisorption
to
be
main
mechanism.
Ion-exchange
Ca2+,
K+
H+
also
played
significant
role
in
After
sorption,
achieved
resorting
incineration.
content
obtained
biochar
4639-fold
higher
when
compared
aqueous
solution
concentration.
Cleaner Water,
Год журнала:
2024,
Номер
2, С. 100027 - 100027
Опубликована: Июль 14, 2024
The
review
article
explores
the
state-of-the-art
advancements
in
using
bioreactors
based
on
microalgae
to
detoxify
wastewater,
with
an
emphasis
removal
of
various
environmental
contaminants
(VECs).
Because
their
persistence
and
capacity
for
bioaccumulation,
these
pollutants—which
include
nutrients,
heavy
metals,
organic
compounds,
microplastics,
Polycyclic
Aromatic
Hydrocarbons
(PAHs),
emerging
contaminants—pose
serious
threats
environment
human
health.
Innovative
solutions
are
required
since
traditional
wastewater
treatment
procedures
frequently
fail
efficiently
eradicate
VECs.
carefully
looks
at
how
well
can
break
down
remove
VECs
from
wastewater.
It
clarifies
numerous
processes,
including
as
biosorption,
biotransformation,
by
which
aid
elimination
pollutants.
Contaminants
be
ingested
microalgae,
then
metabolise
them
into
less
toxic
compounds
or
incorporate
biomass.
This
study
examines
adding
methods
improve
both
overall
effectiveness
operational
stability.
Operational
challenges
such
maintaining
optimal
growth
conditions
scalability
bioreactor
systems,
need
continuous
monitoring
control
thoroughly
discussed.
analysis
highlights
several
avenues
future
research,
genetically
modifying
strains
enhance
pollutant
degradation,
creating
more
effective
designs,
incorporating
cutting-edge
systems.
indicates
that
although
microalgae-based
have
great
potential
VECs,
further
investigation
developments
technology
needed
fully
realise
this
large-scale
applications.
Researchers,
engineers,
politicians
benefit
greatly
review,
offers
a
thorough
grasp
present
applications
treatment.
Microorganisms,
Год журнала:
2022,
Номер
10(5), С. 1041 - 1041
Опубликована: Май 17, 2022
Cyanobacteria-mediated
wastewater
remediation
is
an
economical,
efficient,
and
eco-friendly
technology.
The
present
work
deals
with
the
bioaccumulation
performance
of
Arthrospira
platensis
(Spirulina)
grown
for
four
cycles
in
a
medium
containing
nickel
mono-
polymetallic
synthetic
effluents.
metal
uptake
by
spirulina
biomass
was
evaluated
using
neutron
activation
analysis.
effects
effluents
on
production,
protein,
phycobiliprotein
content
were
assessed.
Metal
accumulation
depended
effluent
composition
ion
concentrations.
Nickel
directly
proportional
to
its
concentration
effluents,
maximum
(1310
mg/kg)
attained
Ni/Cr/Fe
system.
In
same
system,
accumulated
110
times
more
chromium
4.7
iron
than
control.
highest
copper
(2870
achieved
Ni/Cu/Zn/Mo
system
zinc
(1860
mg/kg)-in
Ni/Cu/Zn/Sr
media
loaded
also
chromium,
iron,
copper,
strontium,
zinc,
molybdenum,
decrease
productivity
(on
average
10%)
during
first
cycle
cultivation
moderate
reduction
protein
(by
15-27%)
observed.
presence
metals
inhibited
synthesis,
especially
phycocyanin,
promoted
synthesis
allophycocyanin.
phycocyanin
77%,
increase
allophycocyanin
content-by
45%.
may
be
deemed
as
bioremediation
nickel-polluted
wastewaters
complex
composition.
Abstract
In
the
quest
for
sustainable
environmental
solutions,
marine
microalgae
emerge
as
powerful
allies
in
bioremediation
and
biomass
valorization
endeavors.
This
review
navigates
through
various
facets
of
utilization,
starting
with
isolation,
screening,
identification
techniques,
which
lay
foundation
understanding
strain
diversity
capabilities.
Delving
deeper,
mechanisms
performed
by
are
elucidated,
showcasing
natural
capacity
to
cleanse
polluted
environments
via
biosorption,
bioaccumulation,
biodegradation.
Furthermore,
waste-to-worth
is
explored,
comprehensive
discussions
on
conversions
into
biofuels,
bioplastics,
high-value
products,
animal
feed.
As
one
way
forward,
emerging
advancements
genetic
engineering
enhance
pollutant
removal
capacities
presented
alongside
development
consortia
integrated
waste
treatment
processes.
multidimensional
approach
highlights
ultimate
potential
valorization,
laying
groundwork
a
future
achieved
working
nature,
hand-in-hand.
Clean Technologies,
Год журнала:
2023,
Номер
5(2), С. 638 - 651
Опубликована: Май 17, 2023
The
biosorption
and
bioaccumulation
of
gadolinium
by
Arthospira
platensis
in
batch
experiments
was
examined.
In
experiments,
the
influence
pH,
concentration,
time
contact
temperature
on
sorption
capacity
investigated.
maximum
101
mg/g
attained
at
a
pH
3.0
20
°C.
A
pseudo-first-order
model
applicable
to
describe
kinetics
Freundlich
explain
equilibrium
process.
besides
examination
uptake
platensis,
its
effect
biomass
productivity
as
well
content
proteins,
lipids,
carbohydrates
pigments
assessed.
addition
cultivation
medium
resulted
increase
MDA
and,
same
time,
reduction
amount
proteins
carbohydrates.
other
monitored
parameters
did
not
change
significantly.
water
extracts
obtained
from
showed
higher
antiradical
activity
against
ABTS
cation
radical
comparison
with
ethanolic
extracts.
is
interest
for
development
technology
gadolinium-contaminated
wastewater
remediation.
Water,
Год журнала:
2023,
Номер
15(11), С. 2064 - 2064
Опубликована: Май 29, 2023
Praseodymium,
the
sixth-most
abundant
rare-earth
element,
is
widely
used
in
aircraft
industry
for
elaboration
of
refractory
substances,
coloring
materials,
lighting
equipment,
and
fiber
optical
cables.
Living
non-living
Arthrospira
platensis
biomass
was
applied
Pr(III)
removal
from
aqueous
solutions.
In
bioaccumulation
experiments,
effect
Pr(III),
introduced
into
medium
a
concentration
range
10–30
mg/L,
on
productivity,
biochemical
composition,
antioxidant
activity
assessed.
The
showed
high
accumulation
capacity
(more
than
99%)
toward
Pr(III).
Supplementation
cultivation
with
led
to
decrease
carbohydrate
lipid
content,
but
it
did
not
significantly
influence
productivity
or
content
proteins
pigments.
experiments
biomass,
pH,
concentration,
temperature,
contact
time
efficiency
metal
investigated.
maximum
uptake
achieved
at
pH
3.0
after
min
interaction.
equilibrium
data
were
explained
using
Langmuir
Freundlich
models,
while
kinetics
process
described
by
applying
pseudo-first-order,
pseudo-second-order,
Elovich
models.
sorption
calculated
model
99.3
mg/g.
According
thermodynamic
calculations,
spontaneous
exothermic
nature.
obtained
can
be
development
environmentally-friendly
technology
recovery
wastewater
as
well
understand
aquatic
organisms.
Biotechnology Journal,
Год журнала:
2023,
Номер
18(5)
Опубликована: Фев. 25, 2023
Abstract
Cyanobacteria
of
the
Nostoc
genus
secrete
a
number
biologically
active
compounds,
including
polysaccharides,
which
may
exhibit
antioxidant,
antimicrobial,
anticancer,
and
anti‐inflammatory
properties.
The
aim
study
was
to
investigate
biological
properties
polysaccharides
(NPs)
(antioxidative
antimicrobial)
possibility
using
NPs
addition
in
production
biofoils.
Our
results
allow
indicate
that
were
compatible
with
used
biopolymer
matrix
(furcellaran
chitosan)
showed
antioxidant
tested
polysaccharide
extracts
(0.14%)
exhibited
ability
neutralize
free
radicals
–
2,2′‐azino‐bis(3‐ethylbenzothiazoline‐6‐sulfonic
acid)
(ABTS)
2,2‐diphenyl‐1‐picrylhydrazyl
(DPPH)
at
level
4.46%
10.14%,
respectively.
NP
demonstrated
reducing
15.35
30.07
mg
Trolox
equivalents
(FRAP
CUPRAC
methods,
respectively)
2.64
chlorogenic
acid
(tested
Folin's
reagent).
showed:
growth‐stimulating
effect
(
Escherichia
coli
,
Staphylococcus
aureus
Saccharomyces
cerevisiae
),
no
Penicillum
sp.),
or
slight
inhibitory
Streptomyces
sp.)
on
microorganisms.
enrichment
film
influenced
physic‐chemical
obtained
furcellaran
chitosan
films
decreased
their
water
solubility
(by
approximately
40%
9%,
respectively,
compared
control)
and,
same
time
increased,
absorption.
