Transylvanian Review of Systematical and Ecological Research,
Год журнала:
2024,
Номер
26(2), С. 31 - 56
Опубликована: Авг. 1, 2024
Abstract
Due
to
anthropogenic
activities,
the
water
quality
of
freshwater
bodies
is
rapidly
decreasing.
The
aim
this
study
was
assess
and
phytoplankton
diversity
in
upper
Ravi
River
basin
between
September
2022
August
2023.
Overall,
within
allowable
limits,
but
sampling
zone
3,
there
a
deteriorating
trend
certain
physicochemical
parameters,
including
turbidity,
dissolved
oxygen,
biological
oxygen
demand
during
monsoon
months.
Bacillariophyceae
(11
genera)
most
dominant
group
followed
by
Chlorophyceae
(8
genera).
A
total
23
different
genera
were
observed.
It
can
be
concluded
that
human
such
as
mining
riverbeds,
construction
dams
barrages,
have
direct
impact
on
diversity.
These
activities
need
monitored
regular
basis.
Journal of Hazardous Materials Advances,
Год журнала:
2024,
Номер
14, С. 100434 - 100434
Опубликована: Май 1, 2024
The
major
issue
associated
with
coal
mine
drainage
is
its
contribution
to
river
pollution,
which
occurs
at
the
local,
regional,
and
global
levels.
pollution
of
surface
sediment
by
heavy
metals
a
environmental
health
concern
in
mining
downstream
areas.
This
study
explored
concentrations
eight
metal
components
sediments
from
Shari-Goyain
River
Bangladesh.
trend
decreasing
concentration
was
identified
as
Fe
>
Mn
Ni
Zn
Cu
Cr
Pb
Cd
sediment.
level
area
assessed
using
various
indicators
like
geo-accumulation
index
(Igeo),
load
(PLI),
contamination
factor
(CF),
potential
ecological
risk
factor,
(RI).
exhibited
PLI
values
ranging
0.133
0.543,
suggesting
low
evaluated
(PLI
<
1).
mean
Igeo
showed
that
unpolluted
whereas
moderately
polluted
status.
For
most
metals,
samples
recorded
degree
(CF
1)
except
Pb,
Cd,
moderate
(1
≤
CF
3).
Through
application
statistical
analyses,
has
been
possible
source
analyzed
River.
However,
RI
suggested
studied
To
improve
conditions
River,
it
crucial
construct
permanent
quality
monitoring
stations
conduct
extensive
investigations.
Introduction
The
Nubui
River
is
a
primary
source
of
water
for
drinking
purposes
and
other
domestic
activities
in
the
rural
communities
dotted
along
its
riparian
zone,
with
agriculture
being
major
activity
occurring
this
important
ecotone.
river
has
become
potential
sink
agrochemical
residue,
including
heavy
metals,
apparent
aesthetic
quality
issues,
associated
health
consequences.
This
study,
therefore,
assessed
risks
metals
within
populations
catchment
areas,
who
have
limited
sources
improved
supply.
Methods
concentration
iron
(Fe),
lead
(Pb),
cadmium
(Cd),
mercury
(Hg),
zinc
(Zn)
was
on
cumulatively
275
samples,
using
Perkin
Elmer
PINAAcle
900
T
atomic
absorption
spectrophotometer
11
months.
A
cross-sectional
survey
conducted
amongst
338
community
members,
following
field
observations
utilisation
types,
appeal,
perceived
from
River.
To
determine
human
ecological
hazard
quotient,
chronic
daily
intake,
contamination
factor,
pollution
indices
were
computed.
STATA
version
16
used
to
analyse
results.
Results
Descriptive
statistics
average
concentrations
surface
at
all
sampling
stations
showed
pattern
Hg
<
Pb
Cd
Zn
Fe,
relatively
low
concentrations,
between
0.001
0.004
mg/L
Hg,
0.0011
0.0019
Pb,
0.0461
0.0739
Zn,
0.2409
0.377
Fe.
findings,
however,
high
levels
0.0215
0.0383
two
five
comparison
World
Health
Organisation
(WHO)
guideline
values
some
Hazard
quotient
indicate
that
population
safe
non-carcinogenic
exposure
through
oral
routes.
factor
metal
exceed
recommended
1
100,
respectively.
Meanwhile,
73.1%
members
evidently
preferred
various
86.1%
them
utilising
it
purposes.
occurrence
results
risks.
Toxicology Reports,
Год журнала:
2025,
Номер
14, С. 101964 - 101964
Опубликована: Фев. 20, 2025
Fluoride
pollution
in
freshwater
bodies
is
becoming
alarming
because
it
interferes
with
the
endocrine
system
of
water-dwelling
organisms.
In
this
study,
we
evaluated
effects
sublethal
fluoride
levels
on
thyroid
hormone
and
histological
alterations
Cyprinus
carpio,
a
popular
model
fish
species
used
ecotoxicity
experiments.
The
low,
medium,
high
groups
received
1,
5,
10
mg/L
fluoride,
respectively,
thyroxine
plasma
(T4)
triiodothyronine
(T3)
were
assessed
at
7,
14,
21,
35
days.
findings
revealed
that
both
T4
T3
significantly
decreased
increasing
dose
ranged
from
to
10-41
%
lower
than
controls
group.
On
day
35,
reduced
by
42
50
exposure
group
compared
those
control
Changes
gland
observed
under
light
microscope
included,
but
not
limited
to,
small
follicle
size,
epithelial
hypertrophy,
hyperplasia,
especially
high-fluoride
These
results
suggest
elevated
causes
hormonal
imbalance
carpio
affecting
biosynthesis
functionality,
which
may
result
growth
reproductive
failure.
eminent
dose-response
data
concentration
degree
disruption
clearly
emphasise
severe
endocrine-disruptive
increased
concentrations.
present
study
agree
other
studies
have
described
inhibitory
effect
function
different
species.
Therefore,
conclude
be
potent
disruptor
environment.
As
hormones
play
significant
roles
metabolic
physiological
functions
fish,
these
underscore
importance
improving
standards
habitats.
Research
molecular
pathways
lead
dysfunction
when
exposed
chemical
substance
