Ecotoxicology and Environmental Safety,
Год журнала:
2024,
Номер
274, С. 116231 - 116231
Опубликована: Март 19, 2024
Deposition
of
potentially
toxic
elements
(PTEs)
in
soils
due
to
different
types
mining
activities
has
been
an
increasingly
important
concern
worldwide.
Quantitative
differences
soil
PTEs
contamination
and
related
health
risk
among
typical
mines
remain
unclear.
Herein,
data
from
110
coal
168
metal
across
China
were
analyzed
based
on
265
published
literatures
evaluate
pollution
characteristics,
spatial
distribution,
probabilistic
risks
PTEs.
The
results
showed
that
PTE
levels
both
mine
significantly
exceeded
background
values.
geoaccumulation
index
(I
Heliyon,
Год журнала:
2021,
Номер
7(2), С. e06107 - e06107
Опубликована: Фев. 1, 2021
River
water
is
very
much
important
for
domestic,
agriculture
and
industrial
use
in
Bangladesh
which
critical
condition
from
long
time
based
on
research
data.
During
last
40
years,
extreme
pollution
events
occurred
peripheral
rivers
surrounding
Dhaka
city
Karnaphuli
Chittagong
city.
Present
data
showed
that
other
urban
are
also
especially
Korotoa,
Teesta,
Rupsha,
Pashur
Padma.
The
pollutants
flowing
with
made
a
severe
downstream
areas
of
rivers.
Metals
concentrations
river
was
found
to
be
higher
dry
season.
Dissolve
oxygen
(DO)
nearly
zero
Buriganga
several
points
Turag,
Balu,
Sitalakhya
River.
NO3-,
NO2-
PO43-
different
Zn,
Cu,
Fe,
Pb,
Cd,
Ni,
Mn,
As
Cr
concentration
above
drinking
standard
most
the
some
metals
even
irrigation
Sediment
metal
Karnaphuli,
Rupsha
Meghna
Metal
sediment
US
EPA
threshold
value
fish
agricultural
crops
bioaccumulations
had
occurred.
trend
like:
water
Ecotoxicology and Environmental Safety,
Год журнала:
2021,
Номер
213, С. 112046 - 112046
Опубликована: Фев. 17, 2021
Long-term
retention
and
accumulation
of
heavy
metals
in
rivers
pose
a
great
threat
to
the
stability
ecosystems
human
health.
In
this
study,
Beiyun
River
was
taken
as
example
quantitatively
identify
pollution
sources
assess
source-oriented
health
risk.
A
total
8
(Mn,
Ni,
Pb,
Zn,
As,
Cr,
Cd,
Cu)
were
measured.
Ordinary
kriging
(OK)
inverse
distance
weight
(IDW)
methods
used
predict
distribution
metals.
The
results
showed
that
OK
method
is
more
accurate,
metal
midstream
downstream
much
serious
than
upstream.
Principal
component
analysis-multiple
linear
regressions
(PCA-MLR)
positive
matrix
factorization
(PMF)
sources.
coefficient
determination
(R2)
PMF
closer
1,
analyzed
source
refined.
Furthermore,
result
identification
imported
into
risk
assessment
calculate
hazard
index
(HI)
carcinogenic
(CR)
various
HI
CR
As
Ni
local
residents
River.
Industrial
activities
(23.0%)
are
considered
be
largest
contribution
River,
followed
by
traffic
(17%),
agricultural
(16%),
atmospheric
deposition
(16%).
indicated
industrial
activities.
This
study
provides
"target"
for
precise
control
sources,
which
significance
improving
fine
management
water
environment
basin.
Geocarto International,
Год журнала:
2023,
Номер
38(1)
Опубликована: Май 2, 2023
The
majority
of
people
living
on
earth
rely
groundwater
as
their
primary
supply
water
for
daily
needs.
However,
human
activities
continuously
threaten
this
natural
resource.
In
an
attempt
to
unravel
the
extent
impact
human-related
physicochemical
characteristics
in
Nnewi
and
Awka
urban
clusters
(Nigeria),
several
techniques
were
integrated
study.
Groundwater
samples
warm
acidic
nature.
Concentrations
SO42-,
NO3-,
PO43-,
Cl-,
HCO3-,
Ca2+,
Mg2+,
Na+
K+
within
set
benchmarks.
nutrient
pollution
index
(ranging
from
0.060
0.745),
nitrate
(varying
between
−0.999
−0.790)
0.057
0.630)
estimated
anthropogenic
contamination
showed
low
characteristics.
health
risks
due
ingestion
skin
absorption
nitrate-contaminated
computed
six
age
groups
(6–12
months,
5–10
years,
10–15
15–20
20–60
years
>60
years)
risk
values
that
<
1,
implying
chronic
humans.
cumulative
total
hazard
ranged
0.006
0.787
with
a
mean
value
0.167.
Chemometric
analyses
geochemical
plots
revealed
relationships
variables
sources.
Chadha's
plot
55%
Ca2+-Mg2+-Cl-
waters,
predominating
over
Na+-Cl-
Ca2+-Mg2+-HCO3-
waters.
Bivariate
multivariate
also
indicated
impact.
Furthermore,
principal
component
analysis
R-type
hierarchical
clustering
confirmed
chemistry
quality
mostly
influenced
by
geogenic
processes
than
acts.
Conclusively,
influence
is
low.
These
findings
would
be
useful
future
monitoring
both
clusters.
Analytical Letters,
Год журнала:
2020,
Номер
53(13), С. 2122 - 2144
Опубликована: Фев. 23, 2020
Heavy
metals
in
drinking
water,
even
low
concentrations,
can
be
very
injurious
to
humans.
Groundwater,
spring
and
stream
waters
for
public
consumption
Umunya
district
were
analyzed
understand
the
extent
of
heavy
metal
(Fe,
Zn,
Mn,
Pb,
Cr,
Ni)
pollution.
Several
indexical
statistical
tools
integrated
achieve
research
objectives.
The
utilized
pollution
assessment
(e.g.,
index,
Nemerow's
geoaccumulation
evaluation
modified
index)
showed
that
at
least
40%
water
samples
loaded
with
metals.
Similarly,
overall
index
synthetic
which
used
quality
evaluation,
confirmed
supplies
are
unsuitable
human
consumption.
Moreover,
similar
results
obtained
from
an
ecological
risk
performed
on
samples.
Overall,
Pb
Ni
most
predominant
pollutants
greatly
impacted
resources
performance
interrelationships
models
also
evaluated.
Strong
correlations
observed
among
models.
Furthermore,
multivariate
tools,
such
as
correlation
analysis
factor
analysis,
source
apportionment.
anthropogenic
inputs
more
important
factors
influence
waters.
Therefore,
efforts
should
made
treat
polluted
before
awareness
campaigns
encouraged
protect
further
deterioration
quality.
