Environment International,
Journal Year:
2022,
Volume and Issue:
166, P. 107368 - 107368
Published: June 22, 2022
Comparative
studies
of
neonicotinoid
insecticides
(NNIs)
and
NNI-related
substances
(r-NNIs)
in
foodstuffs
indoor
dust
are
rare.
Herein,
we
investigated
the
feature
fragmentations
nine
NNIs
high-energy
collision
dissociation
cells
via
high-resolution
orbitrap
mass
spectrometry
observed
that
can
consistently
generate
several
fragments
(e.g.,
C6H5NCl+,
C4H3NSCl+,
C6H5NF3+).
Consequently,
r-NNIs
were
comprehensively
(targeted,
suspect,
fragment-dependent)
detected
107
foodstuff
49
samples
collected
from
Nanjing
City
(eastern
China).
We
fully
or
tentatively
identified
9
target
5
these
samples.
93.5%
analyzed
samples,
high
concentrations
vegetables
(mean:
409
ng/g
wet
weight
[ww])
fruits
(127
ww).
Regarding
dust,
imidacloprid
acetamiprid
exhibited
extremely
detection
frequencies
contamination
levels,
highest
mean
dormitory
Based
on
NNI
r-NNI
estimated
daily
intake
values
for
Chinese
adults
children
dietary
ingestion
2080–8190
ng/kg
bw/day
378–2680
pg/kg
bw/day,
respectively.
ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(13), P. 15239 - 15250
Published: March 22, 2024
A
novel
integrated
electrochemical
oxidation
(EO)
and
bacterial
degradation
(BD)
technique
was
employed
for
the
remediation
of
chloropyridinyl
chlorothiazolyl
classes
neonicotinoid
(NEO)
insecticides
in
environment.
Imidacloprid
(IM),
clothianidin
(CL),
acetamiprid
(AC),
thiamethoxam
(TH)
were
chosen
as
target
NEOs.
Pseudomonas
oleovorans
SA2,
identified
through
16S
rRNA
gene
analysis,
exhibited
potential
BD.
In
EO,
selected
NEOs,
total
percentage
chemical
oxygen
demand
(COD)
noted
a
range
58–69%,
respectively.
Subsequently,
biodegradation
EO-treated
NEOs
(BEO)
phase,
higher
(80%)
organic
carbon
removal
achieved.
The
optimum
concentration
found
to
be
200
ppm
(62%)
while
BEO,
COD
efficiency
increased
up
79%.
Fourier-transform
infrared
spectroscopy
confirms
that
heterocyclic
group
aromatic
ring
degraded
EO
further
utilized
by
SA2.
Gas
chromatography–mass
indicated
96%
IM
other
BD
compared
(73%).
New
intermediate
molecules
such
silanediamine,
1,1-dimethyl-n,n'-diphenyl
produced
during
process
served
sources
growth
mineralized.
As
result,
BEO
enhanced
with
lower
consumption
energy.
approach
achieved
order
AC
>
CL
TH.
This
synergistic
holds
promise
efficient
detoxification
from
polluted
environments.
Environment International,
Journal Year:
2022,
Volume and Issue:
166, P. 107368 - 107368
Published: June 22, 2022
Comparative
studies
of
neonicotinoid
insecticides
(NNIs)
and
NNI-related
substances
(r-NNIs)
in
foodstuffs
indoor
dust
are
rare.
Herein,
we
investigated
the
feature
fragmentations
nine
NNIs
high-energy
collision
dissociation
cells
via
high-resolution
orbitrap
mass
spectrometry
observed
that
can
consistently
generate
several
fragments
(e.g.,
C6H5NCl+,
C4H3NSCl+,
C6H5NF3+).
Consequently,
r-NNIs
were
comprehensively
(targeted,
suspect,
fragment-dependent)
detected
107
foodstuff
49
samples
collected
from
Nanjing
City
(eastern
China).
We
fully
or
tentatively
identified
9
target
5
these
samples.
93.5%
analyzed
samples,
high
concentrations
vegetables
(mean:
409
ng/g
wet
weight
[ww])
fruits
(127
ww).
Regarding
dust,
imidacloprid
acetamiprid
exhibited
extremely
detection
frequencies
contamination
levels,
highest
mean
dormitory
Based
on
NNI
r-NNI
estimated
daily
intake
values
for
Chinese
adults
children
dietary
ingestion
2080–8190
ng/kg
bw/day
378–2680
pg/kg
bw/day,
respectively.
