Toxics,
Год журнала:
2023,
Номер
11(4), С. 376 - 376
Опубликована: Апрель 16, 2023
The
dissolved
organic
matter
(DOM)
is
one
of
the
most
sensitive
indicators
changes
in
soil
environment,
and
it
mobile
active
component
that
serves
as
an
easily
available
source
nutrients
energy
for
microbes
other
living
organisms.
In
this
paper,
DOM
structural
characteristics
main
properties
were
investigated
by
three-dimensional
fluorescence
spectroscopy
(EEM)
UV–visible
spectrum
technology
farmland
soils
around
Urumqi
China,
its
possible
sources
pathways
analyzed
spectroscopic
indices.
results
showed
humic-like
substances
composition
DOM,
autogenesis
not
obvious.
Main
such
aromatability,
hydrophobicity,
molecular
weight,
size,
humification
degree
southern
region
higher
than
those
northern
Fukang
on
upper
layers
(0–0.1
0.2
m)
deeper
layer
(0.2–0.3
m).This
may
be
because
tilled
more
subjected
to
fertilization
conducive
microbial
activities.
analysis
these
regions
mainly
from
metabolites.
These
provide
basic
scientific
data
further
research
environmental
chemical
behavior
pollutants
pollution
control
region.
International Journal of Environmental Research and Public Health,
Год журнала:
2022,
Номер
19(3), С. 1702 - 1702
Опубликована: Фев. 2, 2022
The
application
of
manure
as
a
fertiliser
to
farmland
is
regarded
major
source
veterinary
antibiotic
(VA)
contamination
in
the
environment.
frequent
detection
such
emerging
contaminants
and
their
potential
adverse
impacts
on
ecosystem
human
health
have
provoked
increasing
concern
for
VA
transport
fate.
Extrinsic
dissolved
organic
matter
(DOM)
may
be
introduced
into
soil
along
with
Vas,
thus
exert
significant
effects
VAs
via
hydrological
processes
upon
rainfall.
leaching
can
either
enhanced
or
reduced
by
DOM,
depending
nature,
mobility,
interactions
DOM
different
origins.
From
aspect
diversity
reactivity
state-of-the-art
knowledge
DOM-VA
resulting
sorption-desorption
was
reviewed.
Spectroscopic
techniques
examining
extent
binding
reactive
components
are
summarized
usefulness
highlighted.
Models
simulating
under
were
also
It
suggested
that
distinct
various
fertiliser/amendment
origins
should
considered
predicting
soil.
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 10, 2025
Advancing
a
common
understanding
about
the
chemical
composition,
size,
and
three-dimensional
(3D)
structure
of
dissolved
organic
matter
(DOM)
is
paramount
to
deciphering
its
impact
on
involvement
in
environmental
processes,
such
as
fate
transport
contaminants
carbon
cycling.
Traditionally,
DOM
has
been
described
collection
solvent-separated
molecules
or
macromolecules.
More
recently,
depicted
"supramolecular
assembly",
individual
associations
held
together
by
non-covalent
interactions.
The
supramolecular
assembly
model
broadly
invoked
rationalize
certain
behaviors
properties
DOM,
yet
complexity
made
it
difficult
fully
unravel
nature
contributions
intermolecular
Discussed
this
perspective
evidence
regarding
thermodynamic
drivers
associations,
molecular
sorption
optical
DOM.
While
single
observations
may
be
rationalized
former
structural
models,
model,
combined
shows
that
3D
best
mixed
dynamic
(MDAM).
MDAM
depicts
small,
tightly
knit
assemblies
strong
hydrogen
bonds,
which
form
large
through
weak
interactions
only
at
specific
pH
values,
high
ionic
strength,
concentration.
Ecotoxicology and Environmental Safety,
Год журнала:
2025,
Номер
291, С. 117887 - 117887
Опубликована: Фев. 1, 2025
Understanding
the
interaction
between
biocides
and
heavy
metals
with
dissolved
organic
matter
(DOM)
is
basis
of
building
runoff
treatment
facility
development.
In
present
study,
we
aimed
to
quantitatively
determine
binding
biocides/heavy
DOM
evaluate
effect
Cu2
+
on
biocides-DOM
interaction.
We
hypothesize
that
prefer
bind
having
a
larger
molecular
weight
(MW),
this
can
be
inhibited
by
Cu2+.
experiments,
was
separated
into
different
fractions
according
their
MW
difference,
then
investigated
Cu2+,
Zn2+,
biocides,
transformation
products
(TPs)
dialysis
equilibrium.
According
results,
Cu2+
found
highest
affinity
for
fraction
>
100
kDa
mean
value
2.65
μmol/mgC,
which
reduced
decreasing
MW.
Zn2+
much
weaker
than
below
0.296
μmol/mgC
did
not
show
clear
preference
Parent
showed
higher
TPs.
The
followed
order
mecoprop-p
terbutryn
diuron.
Hydrogen
bonding
play
an
important
role
in
binding.
Moreover,
opposite
observed,
inhibition
fractions>
enhancement
<
kDa.
Our
findings
suggest
source
control
biocides/TPs
pollution
because
relatively
high
mobility
environment
expected
due
limited
DOM.
