Case Studies in Chemical and Environmental Engineering,
Год журнала:
2024,
Номер
9, С. 100637 - 100637
Опубликована: Янв. 29, 2024
Palm
oil
mill
effluent
(POME)
has
a
high
concentration
of
organic
matter
and
total
suspended
solids.
However,
improper
disposal
refining
wastes
containing
oils,
fats,
sludge
can
cause
environmental
damage
harm
human
health
due
to
their
toxic,
carcinogenic,
polluting
effects.
This
research
was
carried
out
solve
the
harmful
effects
caused
by
release
POME
environment.
The
goal
this
study
isolate
naturally
occurring
bacterium
that
could
degrade
use
it
as
single
carbon
source.
Bacteria
were
isolated
from
POME-contaminated
medium
using
an
enrichment
technique.
Judging
16S
rRNA
partial
gene
sequencing,
morphological,
biochemical,
molecular
identification
methods,
bacteria
identified
novel
Bacillus
sp.
substrate
concentration,
inoculum
size,
pH,
temperature,
incubation
time
on
bacterial
growth
investigated
"one
factor
at
time"
(OFAT)
approach.
optimal
conditions
for
bacterium's
found
be
pH
7.5,
35
°C,
20
%
v/v
6
96
hours
incubation.
is
capable
reducing
84
COD
91
BOD
sample.
degradation
potential
suggests
used
good
option
bioremediation
POME-polluted
areas.
Frontiers in Plant Science,
Год журнала:
2024,
Номер
14
Опубликована: Янв. 8, 2024
Plants
are
frequently
subjected
to
heavy
metal
(HM)
stress
that
impedes
their
growth
and
productivity.
One
of
the
most
common
harmful
trace
metals
HM
discovered
is
chromium
(Cr).
Its
contamination
continues
increase
in
environment
due
industrial
or
anthropogenic
activities.
Chromium
severely
toxic
plant
development
acts
as
a
human
carcinogen
enters
body
by
inhaling
taking
Cr-contaminated
food
items.
uptake
Cr
via
various
transporters,
such
sulfate
phosphate
transporters.
In
nature,
found
valence
states,
commonly
(III)
(VI).
(VI)
soil's
hazardous
pervasive
form.
elevates
reactive
oxygen
species
(ROS)
activity,
impeding
physiological
metabolic
pathways.
have
evolved
complex
defense
mechanisms
prevent
tolerate
effects
Cr.
These
include
absorbing
accumulating
cell
organelles
vacuoles,
immobilizing
them
forming
complexes
with
organic
chelates,
extracting
using
variety
transporters
ion
channels
regulated
signaling
cascades
transcription
factors.
Several
defense-related
proteins
including,
metallothioneins,
phytochelatins,
glutathione-S-transferases
aid
sequestration
Moreover,
several
genes
transcriptional
factors,
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2023,
Номер
8, С. 100474 - 100474
Опубликована: Авг. 28, 2023
Organochlorine
pesticides
(OCPs)
have
wide
applications
in
agriculture,
industry,
and
domestic
uses.
Unfortunately,
they
are
resistant
to
photolytic
biodegradation
exist
for
a
very
long
time
the
environment.
Their
bioaccumulation
humans
aquatic
biota
could
lead
severe
problems.
In
this
study,
surface
water
samples
were
collected
from
four
sampling
points
along
Okura
River
Eastern
Senatorial
District
of
Kogi
State,
Nigeria.
They
extracted
with
methylene
chloride,
reduced
small
volume
using
rotatory
evaporator,
subjected
clean-up,
analyzed
gas
chromatography
mass
spectrometry
(GC-MS).
The
results
show
that
level
OCPs
SP1,
SP2,
SP3
SP4
between
ND
-
0.1357
±
6.3
×
10−5
mg/L,
0.0767
1.3
10−3,
0.046
7.5
10−4,
0.0211
2.6
10−3
respectively.
health
risk
assessment
was
evaluated
United
States
Environmental
Protection
Agency
(USEPA)
methods
hazard
quotient
(HQ),
average
daily
dose
(ADD)
cancer
(CR).
HQ,
ADD
CR
less
than
USEPA
recommended
permissible
limit
1,
10−4
10−6
Therefore,
there
is
no
risk.
However,
concentrations
analytes
detected
slightly
above
standard
maximum
100
ng/L.
all
anthropogenic
activities
disposal
agrochemical
wastes
into
should
be
controlled,
provision
quality
inhabitants
river.
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2023,
Номер
8, С. 100468 - 100468
Опубликована: Авг. 19, 2023
Phenol
and
phenolic
compounds
are
common
environmental
contaminants
in
textile,
petrochemical,
pharmaceutical;
oil,
food
industries
this
can
cause
a
vital
threat
to
the
environment.
This
contaminant
is
readily
absorbed
when
it
encounters
skin
or
respiratory
system
may
lead
serious
itching,
be
lethal
if
swallowed.
The
exposure
excessive
phenol
inside
human
body
has
detrimental
effects
on
system,
slows
growth.
aim
of
research
investigate
degrading
ability
bacteria
petroleum
products
contaminated
environment
using
high
performance
liquid
chromatography.
In
investigation,
microorganisms
having
potential
biodegrade
were
isolated
from
petroleum-contaminated
locations.
strains
identified
as
Citrobacter
sedlakii
strain
NWPK
with
accession
no.
MW720666
Acinetobacter
baumanii
NWPKD
MW720652
based
molecular
analysis
achieved
via
16S
rRNA
sequence
phylogenetic
found
degrade
efficiently
sole
carbon
energy
source.
After
6
days
incubation
MSM
media,
isolates
tested
for
growth
optical
density
at
various
concentrations
phenol.
While
densities
NWPKD,
respectively,
vary
0.02
0.06
0.03–0.05
500
1000
mg/L
content.
However,
cultivated
because
they
utilized
their
exclusive
When
compared
isolate
showed
strongest
biodegradation
capacity,
consuming
86.46%
87.94%
Because
capacity
consume
substance,
investigation
demonstrated
that
two
employed
bioremediation
environments
have
been
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2023,
Номер
8, С. 100540 - 100540
Опубликована: Ноя. 3, 2023
Lead
is
one
of
the
most
toxic
heavy
metals
ever
known
by
man
today,
which
has
zero
biological
role.
It
to
cause
anemia
and
affect
nervous
reproductive
systems
with
irreversible
effects.
Its
continual
usage
leads
its
high
accumulation
polluting
soil
water
bodies
devastating
health
This
research,
aimed
at
isolation
characterization
indigenous
lead
tolerant
bacteria
from
contaminated
Anka.
Results
Atomic
Absorption
Spectrophotometry
(AAS)
showed
concentration
(738
mg/kg)
affected
sites
above
EPA
standard
(400
mg/kg).
Similarly,
a
mineral
salt
media
was
used
isolate
following
serial
dilution.
An
bacterial
(Ac)
potential
tolerate
up
3000
mg/L
Pb(NO3)2
isolated
molecularly
identified
based
on
16s
rRNA
sequencing
as
Bacillus
cereus
strain
BUK_BCH_BTE2
accession
number
MT160412.
The
further
characterized
for
optimum
growth
tolerance
conditions
using
factor
time
(OFAT).
Sucrose
an
5
g/L
best
carbon
source
isolate.
found
utilize
ammonium
sulphate
nitrogen
2.5
g/L,
pH
tempertaure
7.0
37
°C
respectively.
A
1000
be
incubation
inoculum
size
were
48
hrs
100
μL
fact
that
could
makes
it
suitable
future
bioremediation
work
involving
lead.
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2024,
Номер
9, С. 100608 - 100608
Опубликована: Янв. 3, 2024
Chlorpyrifos,
being
a
frequently
used
organophosphate
pesticide
poses
significant
threat
to
human
health
due
its
prolonged
presence
in
soil,
plants,
and
water,
this
has
raised
concern.
Consequently,
researchers
have
shifted
their
attention
towards
finding
methods
mitigate
toxicity
or
eliminate
it
from
the
environment.
This
highlighted
importance
of
bioremediation.
study
was
aimed
at
analyzing
characterizing
metabolites
chlorpyrifos
degradation
by
Bacillus
sp.
strain
UPMB10
isolated
polluted
environment
using
Gas
Chromatography-Mass
Spectrometry.
The
bacteria
were
successfully
utilizing
enrichment
technique
mineral
salt
media,
followed
screening
obtain
best
isolate.
Identification
isolate
done
morphological,
biochemical,
molecular
levels,
with
focus
on
16S
rRNA
gene.
Phylogenetic
analysis
revealed
close
relationship
between
bacterium
UPMB10.
Optimization
(One
Factor
A
Time)
determine
growth
conditions
optimal
obtained
include,
incubation
time
48
hours,
substrate
concentration
4
g/L,
pH
7.0,
temperature
37
°C,
an
inoculum
size
2
%
(v/v),
these
quantitative
data
valuable
insights
into
factors
affecting
efficient
pesticide.
Spectrometry
demonstrated
that
achieved
remarkable
efficiency
99
after
hours
incubation.
Notably,
Mesitylene
Dimethylmalonic
acid
as
some
degradation.
result
provides
insight
transformation
products
generated
during
process.
exhibits
capacity
for
degradation,
making
promising
candidate
bioremediation
insecticides
acaricides.
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2024,
Номер
9, С. 100650 - 100650
Опубликована: Фев. 2, 2024
Fungal
processes
for
the
treatment
of
dye
contaminated
wastewater
have
advantage
being
cost-effective,
environmentally
friendly,
and
producing
less
sludge.
This
research
was
therefore
aimed
at
isolating
characterizing
fungus
capable
decolourizing
utilizing
azo
(dimethyl
yellow)
as
a
sole
carbon
source
using
one-factor-at-a-time.
Pour
plating
method
used
to
isolate
on
mineral
salt
media
(MSM)
following
serial
dilution.
The
then
morphologically
molecularly
identified
Aspergillus
quadrilineatus
strain
BUK_BCH_BTE1
with
accession
number
OK178927
based
ITS1
ITS2
rRNA
gene
sequence
molecular
phylogenetic
analysis.
Characterization
conducted
by
studying
effect
temperature,
incubation
time,
substrate
concentration,
pH,
inoculum
size
heavy
metals.
decolourization
growth
dimethyl
yellow
isolated
optimal
concentration
200
μɡ/mL,
temperature
30
°C,
100–200
μL
size,
pH
5.0,
72-hour
time.
found
tolerate
up
4
ppm
Hg,
Cu
Zn,
maximum
inhibition
shown
Cr
Ar.
LC/MS
analyses
intermediate
compounds
produced
during
suggested
that
in
fungal
biodegradation
detected
formation
yellow,
2,6-dichloro-p-benzoquinone,
1,2,3,5-tetrafluoro-4-nitrobenzene,
3,4-dinitrobenzoic
acid
metabolites.
finding
from
this
study
is
suitable
candidate
bioremediation
coloured
effluents
particularly
containing
these
compounds.
