Environmental Science & Technology,
Journal Year:
2022,
Volume and Issue:
56(24), P. 17763 - 17775
Published: Dec. 8, 2022
Disinfection
byproducts
(DBPs)
in
swimming
pool
water
are
of
wide
concern
for
public
health.
In
this
study,
the
occurrence
five
categories
aliphatic
halogenated
DBPs,
i.e.,
trihalomethanes
(THMs),
haloacetic
acids
(HAAs),
haloacetonitriles
(HANs),
halonitromethanes
(HNMs),
and
haloketones
(HKs),
six
aromatic
halophenols
(HPs),
halonitrophenols
(HNPs),
halohydroxy-benzaldehydes
(HBALs),
halohydroxybenzoic
(HBAs),
halobenzoquinones
(HBQs),
haloanilines
(HAs),
was
examined
seven
indoor
their
incoming
tap
water.
The
correlations
between
DBP
concentrations
quality
parameters
were
explored.
Moreover,
cytotoxicity
DBPs
tested
with
human
hepatoma
(HepG2)
cells,
concentration-cytotoxicity
contributions
different
calculated.
results
demonstrate
that
24
(5
THMs,
8
HAAs,
5
HANs,
4
HNMs,
2
HKs)
50
(9
HPs,
HNPs,
9
HBALs,
HBAs,
11
HBQs,
HAs)
present
water,
among
which
41
detected
first
time.
average
order
HAAs
>
HANs
HKs
THMs
while
those
HNMs.
significantly
lower
than
following
HBQs
HPs
HBAs
HBALs
HAs
HNPs.
followed
HNMs
HNPs
HAs,
possessing
main
(93.2%
total)
all
categories.
Textile
printing
and
dyeing
wastewater
is
a
substantial
source
of
highly
toxic
halogenated
pollutants
because
the
chlorination
decolorization.
However,
information
on
occurrence
fate
byproducts,
which
are
produced
by
decolorization
textile
wastewater,
very
limited.
In
this
study,
six
categories
byproducts
(haloacetic
acids
(HAAs),
haloacetonitriles
(HANs),
Journal of Hazardous Materials,
Journal Year:
2021,
Volume and Issue:
425, P. 128030 - 128030
Published: Dec. 9, 2021
Disinfection
by-products
(DBPs)
are
one
of
the
unintended
consequences
water
disinfection
that
commonly
detected
in
various
environments.
Although
DBPs
known
to
induce
antimicrobial
resistance
via
stimulation
chromosomal
mutations,
it
remains
unclear
whether
low-concentration
could
stimulate
conjugative
transfer
antibiotic
genes
(ARGs).
The
present
study
aimed
investigate
effect
two
typical
DBPs,
namely
trichloromethane
(TCM)
and
dichloroacetonitrile
(DCAN),
on
RP4
plasmid
Escherichia
coli
genera.
results
demonstrated
exposure
low
concentrations
TCM
DCAN
significantly
stimulated
ARGs,
wherein
application
25
μg/L
10
resulted
maximum
fold
change
~5.5–
~6.0–fold,
respectively,
at
16
h
exposure.
Further,
assessment
underlying
mechanisms
revealed
involvement
intracellular
reactive
oxygen
species
generation,
SOS
response,
increase
cell
membrane
permeability,
upregulation
expression
proteins
related
pilus
ATP
synthesis,
gene
expression.
Our
findings
provided
a
better
understanding
hidden
biological
effects
ecological
risks
environment,
especially
concerning
their
spread
resistance.
