Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(32), P. 14575 - 14584
Published: Aug. 2, 2024
The
chromogenic
reaction
between
2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate)
(ABTS)
and
ferrate
[Fe(VI)]
has
long
been
utilized
for
Fe(VI)
content
measurement.
However,
the
presence
of
electron-rich
organic
compounds
found
to
significantly
impact
detection
using
ABTS
method,
leading
relative
errors
ranging
from
∼88
100%.
Reducing
substances
consumed
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 3, 2025
The
polymerization
pathway
of
contaminants
rivals
the
traditional
mineralization
in
water
purification
technologies.
However,
designing
suitable
oxidative
environments
to
steer
toward
remains
challenging.
This
study
introduces
a
nitrogen-oxygen
double
coordination
strategy
create
an
asymmetrical
microenvironment
for
Co
atoms
on
Ti3C2Tx
MXenes,
resulting
novel
Co-N2O3
microcellular
structure
that
efficiently
activates
peroxymonosulfate.
unique
activation
capability
led
complete
removal
various
phenolic
pollutants
within
3
min,
outperforming
representative
single-atom
catalysts
reported
past
three
years.
Identifying
and
recognizing
reactive
oxygen
species
highlight
crucial
role
⋅O2
-.
efficient
pollutant
occurs
through
--mediated
radical
pathway,
functioning
as
self-coupling
reaction
rather
than
deep
oxidation.
Theoretical
calculations
demonstrate
electron-rich
transfer
more
electrons
catalyst
surface,
inducing
reduction
dissolved
-
microregion.
In
practical
continuous
flow-through
application,
system
achieved
100
%
acetaminophen
efficiency
6.5
h,
with
hydraulic
retention
time
just
0.98
s.
provides
new
insights
into
previously
underappreciated
purification,
offering
simple
advancing
aggregation
technology
field
wastewater
treatment.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(47), P. 18775 - 18787
Published: July 28, 2023
Pharmaceuticals
have
been
considered
a
priority
group
of
emerging
micropollutants
in
source
waters
recent
years,
while
their
role
the
formation
and
toxicity
disinfection
byproducts
(DBPs)
during
chlorine
remains
largely
unclear.
In
this
study,
contributions
natural
organic
matter
(NOM)
pharmaceuticals
(a
mixture
ten
representative
pharmaceuticals)
to
overall
DBP
drinking
water
chlorination
were
investigated.
By
innovatively
"normalizing"
exposure
constructing
kinetic
model,
we
able
differentiate
evaluate
NOM
total
halogen
(TOX)
for
that
contained
different
levels
pharmaceuticals.
It
was
found
at
contact
time
1.0
h,
(2
mg/L
as
C)
(total
0.0062-0.31
contributed
79.8-99.5%
0.5-20.2%,
respectively,
TOX.
The
test
results
showed
remarkably
increased
pharmaceutical
by
converting
parent
compounds
into
more
toxic
pharmaceutical-derived
DBPs,
these
DBPs
might
contribute
significantly
developmental
chlorinated
waters.
This
study
highlights
non-negligible
water.
Catalysts,
Journal Year:
2023,
Volume and Issue:
13(2), P. 434 - 434
Published: Feb. 17, 2023
The
photocatalytic
degradation
of
the
emerging
contaminant
paracetamol
in
aqueous
solution
has
been
studied
under
1
SUN
(~1000
W
m−2)
presence
four
commercial
TiO2
powders,
namely
sub-micrometric
anatase
and
rutile,
nanometric
brookite
P25
(the
popular
anatase/rutile
mixture
used
as
a
benchmark
most
papers).
rutile
powder
showed
low
activity,
whereas,
interestingly,
powders
outperformed
terms
total
conversion
to
carboxylic
acids,
which,
according
literature,
are
final
products
its
degradation.
To
explain
such
results,
physicochemical
properties
were
by
applying
multi-technique
approach.
Among
usually
affecting
performance
TiO2,
some
surface
impurities
likely
deriving
from
K3PO4
(used
crystallization
agent)
was
found
significantly
affect
percentage
obtained
with
powder.
confirm
role
phosphate,
sample
anatase,
lab
synthesis
procedure
having
“clean”
surface,
control,
though
characterized
particles
higher
area.
less
active
than
but
it
more
after
impregnation
K3PO4.
Conversely,
Cl
at
did
not
sizably
(overall
poor)
activity
remarkable
ascribed
combination
several
properties,
including
band
structure
nanoparticles
size.
