Environmental Technology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 10
Published: Jan. 8, 2025
The
widespread
existence
of
sulfapyridine
(SPD,
a
typical
representative
sulfonamide)
in
natural
environment
has
raised
increasing
interest
because
its
potential
to
cause
antibiotic-resistant
genes.
In
this
work,
the
degradation
SPD
during
heat-activated
peroxodisulfate
(heat/PDS)
oxidation
process
was
explored.
pseudo-first-order
rate
constant
(kobs)
0.0149
min−1
with
0.5
mM
PDS
at
pH
7.
kobs
values
were
increased
obviously
concentration.
Such
ascribed
sulfate
radical
(SO4•−)
primarily
according
quenching
test.
A
total
16
transformation
products
derived
from
hydroxylation,
aniline
moiety
oxidation,
and
SO2
extrusion
&
rearrangement
pathways
identified
by
high-resolution
mass
spectrometry
(HRMS)
theoretical
calculations.
Of
which,
production
nitrated
byproducts
attributed
molecule.
organic
matter
(NOM)
reduced
efficiency
SPD,
while
effects
coexisting
anions
(i.e.,
NO3−,
CO32−,
Cl−)
negligible.
These
findings
illustrated
that
can
be
effectively
degraded
but
generation
heat/PDS
process,
which
should
paid
attention
when
SR-AOPs
is
applied.
