Toxics,
Journal Year:
2024,
Volume and Issue:
12(6), P. 402 - 402
Published: May 31, 2024
In
this
study,
the
degradation
system
of
Shewanella
oneidensis
MR-1
and
goethite
was
constructed
with
chlorpyrifos
as
target
contaminant.
The
effects
initial
pH,
contaminant
concentration,
temperature
on
removal
rate
during
process
were
investigated.
experimental
conditions
optimized
by
response
surface
methodology
a
Box–Behnken
design
(BBD).
results
show
that
is
75.71%
at
pH
=
6.86,
an
concentration
19.18
mg·L−1,
30.71
°C.
LC-MS/MS
analyses
showed
products
C4H11O3PS,
C7H7Cl3NO4P,
C9H11Cl2NO3PS,
C7H7Cl3NO3PS,
C9H11Cl3NO4P,
C4H11O2PS,
C5H2Cl3NO.
Presumably,
pathways
involved
are:
enzymatic
degradation,
hydrolysis,
dealkylation,
desulfur
dechlorination.
findings
study
demonstrate
efficacy
goethite/S.
complex
in
from
water.
Consequently,
research
contributes
to
establishment
theoretical
framework
for
microbial
remediation
organophosphorus
pesticides
aqueous
environments.
Bioremediation Journal,
Journal Year:
2024,
Volume and Issue:
28(4), P. 491 - 511
Published: Feb. 15, 2024
Chlorpyrifos,
one
of
the
most
frequent
organophosphorus
pesticides,
has
been
linked
to
major
health
problems
and
widespread
environmental
degradation.
It
is
imperative
remove
this
herbicide
from
its
point
source
contamination
since
risk
their
off-site
migration
poses
a
concern
non-target
organisms.
The
objective
present
study
was
investigate
biodegradation
chlorpyrifos
20%
emulsifiable
concentration
(EC)
utilizing
consortium
bacteria
that
had
previously
isolated
pesticide-contaminated
site
are
tolerant
(S27I
S28I).
Free
cells
immobilized
with
as
only
carbon
were
used
analyze
biodegradation.
Charcoal–alginate
kaolin–alginate
immobilization
matrices
employed
in
investigation.
By
using
gas
chromatography-mass
spectrophotometer
analysis,
degradation
investigated.
When
compared
free
cells,
bacterial
isolates
showed
greatest
amount
Consortium
(C1)
among
degraded
quickly
S27I
S28I.
also
examined
toxicity
at
doses
10,
25,
50,
75,
100
ppm
on
green
gram
seeds'
morphological
parameters.
Increased
concentrations
resulted
appreciable
variations
germination
percentage,
shoot
length,
root
length.
evaluate
detoxification
following
breakdown.
Journal of Environmental Science and Health Part B,
Journal Year:
2023,
Volume and Issue:
58(2), P. 100 - 109
Published: Feb. 1, 2023
Chlorpyrifos
(CPF)
is
a
widely
used
organophosphorus
pesticide.
Increasing
evidence
has
shown
that
exposure
to
CPF
in
early
life
might
induce
neurodevelopmental
disorders,
but
the
pathogenesis
remains
uncertain.
Synaptic
plasticity
plays
crucial
role
neurodevelopment.
This
study
aimed
investigate
effect
of
on
synaptic
hippocampal
neurons
and
establish
cellular
mechanism
underlying
these
effects.
Using
CPF-exposed
rat
primary
model,
we
analyzed
impact
morphology,
expression
level
presynaptic
protein,
postsynaptic
protein
ionotropic
glutamate
receptors
(iGluRs),
as
well
effects
Wnt/β-catenin
pathway.
We
found
synapses
were
shortened,
spines
decreased,
synaptophysin
(Syp),
density-95
(PSD-95),
GluN1,
GluA1
Wnt7a,
active
β-catenin
was
decreased.
Our
suggests
induced
dysregulation
neurons,
which
provide
novel
information
regarding
CPF-induced
disorders.
Toxics,
Journal Year:
2024,
Volume and Issue:
12(3), P. 207 - 207
Published: March 9, 2024
Persulfate-based
advanced
oxidation
process
has
been
proven
to
be
a
promising
method
for
the
toxic
pesticide
chlorpyrifos
(CPY)
degradation
in
wastewater
treatment.
However,
due
limitation
short-lived
intermediates
detection,
comprehensive
understanding
pathway
remains
unclear.
To
address
this
issue,
density
functional
theory
was
used
analyze
mechanism
of
CPY
at
M06-2X/6-311++G(3df,3pd)//M06-2X/6-31+G(d,p)
level,
and
computational
toxicology
methods
were
employed
explore
toxicity
its
products.
Results
show
that
hydroxyl
radicals
(·OH)
sulfate
(SO4•−)
initiate
reactions
by
adding
P=S
bond
abstracting
H
atom
on
ethyl
group,
rather
than
undergoing
α-elimination
pyridine
ring
persulfate
process.
Moreover,
addition
products
attracted
degraded
breaking
P–O
bond,
while
abstraction
through
dealkylation
reactions.
The
transformation
products,
including
3,5,6-trichloro-2-pyridynol,
O,O-diethyl
phosphorothioate,
oxon,
acetaldehyde,
obtained
theoretical
calculations
have
detected
previous
experimental
studies.
reaction
rate
constants
with
·OH
SO4•−
6.32
×
108
9.14
M−1·s−1
room
temperature,
respectively,
which
consistent
values
4.42
109
4.5
M−1
s−1.
Toxicity
evaluation
results
indicated
acute
chronic
aquatic
organisms
gradually
decreased
during
some
still
possess
or
highly
levels,
may
pose
risks
human
health.
These
research
findings
contribute
behavior
risk
assessment
practical
Toxics,
Journal Year:
2024,
Volume and Issue:
12(6), P. 402 - 402
Published: May 31, 2024
In
this
study,
the
degradation
system
of
Shewanella
oneidensis
MR-1
and
goethite
was
constructed
with
chlorpyrifos
as
target
contaminant.
The
effects
initial
pH,
contaminant
concentration,
temperature
on
removal
rate
during
process
were
investigated.
experimental
conditions
optimized
by
response
surface
methodology
a
Box–Behnken
design
(BBD).
results
show
that
is
75.71%
at
pH
=
6.86,
an
concentration
19.18
mg·L−1,
30.71
°C.
LC-MS/MS
analyses
showed
products
C4H11O3PS,
C7H7Cl3NO4P,
C9H11Cl2NO3PS,
C7H7Cl3NO3PS,
C9H11Cl3NO4P,
C4H11O2PS,
C5H2Cl3NO.
Presumably,
pathways
involved
are:
enzymatic
degradation,
hydrolysis,
dealkylation,
desulfur
dechlorination.
findings
study
demonstrate
efficacy
goethite/S.
complex
in
from
water.
Consequently,
research
contributes
to
establishment
theoretical
framework
for
microbial
remediation
organophosphorus
pesticides
aqueous
environments.
