Decreased bromate formation but inadvertently increased toxicity in the chloramination-ozonation process: Essential roles of halamines in generating halogenated and nitrogenous byproducts
Water Research,
Год журнала:
2025,
Номер
283, С. 123786 - 123786
Опубликована: Май 5, 2025
Язык: Английский
Increased Toxicity toward Mammalian Cells in the Periodate Oxidation Process of Wastewater: The Overlooked Formation of Noniodinated but Nitrogenous Byproducts
Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 5, 2024
Periodate
(PI)
shows
promising
potential
as
an
oxidant
for
wastewater
treatment;
however,
its
impact
on
the
toxicity
of
remains
unknown.
Here,
we
found
that
with
100
μM
PI
addition,
cytotoxicity
increased
from
4.8
to
7.6
mg-Phenol/L
9.5
12.8
mg-Phenol/L,
and
genotoxicity
0.3
0.9
μg-4-NQO/L.
Interestingly,
hypoiodous
acid
(HOI)
was
not
detected
during
reaction,
there
no
observed
increase
in
concentration
total
organic
iodine
(TOI).
CHON
components
dissolved
matter
changed
most
obviously
oxidation,
which
might
serve
primary
precursors
toxic
byproducts.
Cytotoxicity
typical
nitrogen-containing
tryptophan,
lysine,
phenylalanine,
tyrosine
after
oxidation
14.7,
2.4,
4.1,
3.2
respectively.
four
nonhalogenated
aromatic
nitrogenous
byproducts
(N-DBPs)
3-hydroxyquinoline,
4-hydroxyquinoline,
benzopyridine,
benzopyrrole
were
confirmed
using
standards,
such
2-formylbenzonitrile
tentatively
proposed.
The
comparable
those
known
N-DBPs
nitrosamines,
suggesting
attention
should
be
given
these
but
two
PI-treated
samples
concentrations
0.8,
0.98,
0.52,
0.0038,
18.28,
1.50,
0.57,
0.0074
μg/L,
respectively,
contributions
less
than
1.5%
overall
cytotoxicity.
Further
investigations
are
warranted
elucidate
drivers
wastewater.
Язык: Английский
Formation and estimated cytotoxicity of trihalomethanes and haloacetic acids during ozonation of nonylphenol in bromide-containing water after chlorination process: Impact of ozonation initial pH
Toxicology Reports,
Год журнала:
2024,
Номер
13, С. 101769 - 101769
Опубликована: Окт. 18, 2024
Язык: Английский