Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 9, 2024
Abstract
The
heavy
application
of
dinotefuran
(DNT)
pesticide
in
agricultural
production
and
the
humic
acid
(HA)
ubiquitous
aqueous
systems
have
burdened
environment
as
a
new
pollutant.
chemical
fraction
mobility
cadmium
(Cd)
sediments
urban
river
environments
which
DNT
HA
coexist
are
poorly
understood.
In
this
study,
sequential
extraction,
ultraviolet-visible
spectroscopy
(UV-vis),
fluorescence
excitation-emission
matrix
(EEM),
fourier
transform
infrared
spectrometer
(FTIR)
techniques,
Stern-Volmer
equationwere
integrated
to
identify
effects
DNT,
pH,
concentration
molecular
weight
(Mw)
fractions
on
content
Cd
sediments.
dosage
strongly
affected
Fe–Mn
oxide-associated
facilitated
migration
from
water.
release
was
also
promoted
by
lower
pH
5–6
compared
8–9.
Increasing
concentrations
higher
HAs
>100
kDa,
30–100
30–10
kDa
reduced
total
Cd,
exchangeable/acid
soluble
fraction,
reducible
sediments,
while
1–10
<1
did
not
significantly
influence
or
content.
present
study
provides
insights
into
environmental
risks
partitioning
under
co-exposure
HA.
