Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Sept. 29, 2023
Abstract
The
contribution
of
urban
sewage
treatment
plants
to
pollution
with
emerging
contaminants
is
still
underestimated
and
discharge
zones
are
not
always
subject
adequate
monitoring
activities.
In
this
study,
we
apply
the
combination
risk
level
ranking
a
specific
class
pollutants
(potentially
toxic
elements)
assessment
metabolic
activity
sediment
microbial
communities.
approach
identifies
most
harmful
elements
in
local
environment
upper
sub-catchment
Iskar
River,
Bulgaria.
effect
on
communities
was
assessed
by
determination
share
viable
cells
inhibition
their
(fluorescent
staining
method
digital
image
analysis).
data
showed
that
Hg
Cu
came
at
top
list
concerns
for
matrix
surface
waters;
Cu,
Cd,
Pb
pose
greatest
sediments.
wastewater
area
were
affected
high
nutrients
organic
content
effluent.
applied
has
potential
help
us
focus
future
site-specific
control
water
bodies,
receiving
discharges,
contributes
better
understanding
ecological
risks
from
hazardous
pollutants.
International Journal of Environmental Research and Public Health,
Journal Year:
2022,
Volume and Issue:
19(13), P. 7896 - 7896
Published: June 27, 2022
Heavy
metal
contamination
in
coastal
waters
may
pose
a
serious
threat
to
aquatic
products
and
human
health.
This
study
aimed
gain
better
understanding
of
the
pollution-induced
by
heavy
metals
Haikou
Bay
adjacent
seas
assessed
potential
ecological
risk.
The
spatial
distributions
including
Cu,
Pb,
Zn,
Cd,
Cr,
Hg,
As
were
analyzed
surface
bottom
water,
sediment,
five
species
fish
collected
from
seas.
For
seawater,
results
showed
that
horizontal
distribution
seven
elements
area
had
no
uniform
pattern
due
influence
complex
factors,
such
as
land-based
runoff,
port
shipping,
ocean
current
movement.
In
contrast,
vertical
these
elements,
except
for
Zn
high
concentrations
water
low
water.
Due
symbiotic
relationship
between
two
similar
areas.
Different
highest
sediment
all
occurred
at
station
11
Pb.
Our
revealed
organic
carbon
sulfide
are
important
factors
affecting
sediments.
lower
than
quality
standard
class
I
according
China
National
Standard
Seawater
Quality
quality,
suggesting
seawater
has
not
been
polluted
metals.
Additionally,
was
main
element
this
area,
attention
should
be
paid
future.
target
hazard
quotient
(THQ)
values
1.0,
indicating
eating
will
risk
These
provide
valuable
information
further
status
pollution
development
targeted
conversation
measures
environment
consumers.
Gels,
Journal Year:
2024,
Volume and Issue:
10(5), P. 348 - 348
Published: May 20, 2024
Over
the
years,
concentration
of
cadmium
in
soil
has
increased
due
to
industrialization.
Cadmium
enters
human
body
through
plant
accumulation,
seriously
endangering
health.
In
current
study,
two
types
hydrogels
were
successfully
synthesized
using
a
free
radical
polymerization
method:
an
ion-type
hydrogel
referred
as
DMAPAA
(N-(3-(Dimethyl
amino)
propyl)
acrylamide)/DMAPAAQ
(N,N-Dimethyl
amino
propyl
acrylamide,
methyl
chloride
quaternary)
and
non-ion-type
known
DMAA
(N,N-Dimethylacrylamide).
experiment
carried
out
this
DMAPAA/DMAPAAQ
was
introduced
cadmium-contaminated
for
vegetable
cultivation.
The
study
found
that
at
levels
0
2
mg/kg
soil,
when
exposed
pH
solution,
wasn’t
detected
filtrate
ICP.
As
amount
500
mg/kg,
addition
gradually
reduced
concentration.
Notably,
use
4%
resulted
mg/L
cadmium.
For
0%
hydrogel,
absorption
determined
be
0.07
mg/g,
contrasting
with
0.03
mg/g
hydrogel.
significantly
boosts
growth
by
efficiently
absorbing
nitrate
ions
ion
exchange,
releasing
them
uptake.
contrast,
used
control,
does
not
enhance
despite
its
water
properties.
summary,
composite
shows
great
potential
enhancing
yield
immobilizing
heavy
metals
soil.
Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Sept. 29, 2023
Abstract
The
contribution
of
urban
sewage
treatment
plants
to
pollution
with
emerging
contaminants
is
still
underestimated
and
discharge
zones
are
not
always
subject
adequate
monitoring
activities.
In
this
study,
we
apply
the
combination
risk
level
ranking
a
specific
class
pollutants
(potentially
toxic
elements)
assessment
metabolic
activity
sediment
microbial
communities.
approach
identifies
most
harmful
elements
in
local
environment
upper
sub-catchment
Iskar
River,
Bulgaria.
effect
on
communities
was
assessed
by
determination
share
viable
cells
inhibition
their
(fluorescent
staining
method
digital
image
analysis).
data
showed
that
Hg
Cu
came
at
top
list
concerns
for
matrix
surface
waters;
Cu,
Cd,
Pb
pose
greatest
sediments.
wastewater
area
were
affected
high
nutrients
organic
content
effluent.
applied
has
potential
help
us
focus
future
site-specific
control
water
bodies,
receiving
discharges,
contributes
better
understanding
ecological
risks
from
hazardous
pollutants.
