Applied Geochemistry,
Journal Year:
2023,
Volume and Issue:
152, P. 105644 - 105644
Published: March 25, 2023
Understanding
the
geochemistry
and
contamination
of
rivers
affected
by
rupture
tailings
dams
is
paramount
to
emergency
water
resources
management.
This
needs
long-term
monitoring
tailings,
sediments
along
river,
understanding
how
interact
physically
geochemically
with
natural
flowing
water.
An
effort
this
kind
uncommon
because
its
cost
opportunity.
The
purpose
study
was
help
filling
gap
using
B1
dam
(Brumadinho,
Minas
Gerais,
Brazil,
25
January
2019)
as
example.
To
accomplish
objective,
31
parameters
sediment
were
monitored
weekly
for
three
years
after
event,
spanning
impacted
non-impacted
sectors
Paraopeba
River,
including
a
reservoir
that
attenuating
propagation
downstream.
Using
hierarchical
clustering
analysis,
assembled
into
groups.
Associations
between
within
groups
pointed
processes
drivers
controlling
concentrations
Fe,
Mn,
Al,
As,
Pb
P
in
results
suggested
reductive
dissolution
Pb-
Mn-bearing
minerals
key
process.
In
rainy
period,
dissolved
Mn
sector
raised
exponentially
temperature
increase;
reservoir,
they
showed
episodic
peaks
triggered
thermal
stratification-related
pH
decreases.
general,
total
>
indicating
predominant
particle
transport.
Besides,
higher
Al
season,
sector.
dry
stream
flow-controlled
resuspension
desorption
Fe
from
sand
grains
raising
their
concentrations.
declining
trend
probably
related
erosion
acid
soils
watershed
caused
gradual
increases
P,
desorbed
clays
silts.
main
conclusion
left
strong
fingerprint
especially
which
lasts
keeps
use
River
suspended.
The Science of The Total Environment,
Journal Year:
2023,
Volume and Issue:
891, P. 164426 - 164426
Published: May 24, 2023
The
collapse
of
B1
dam
at
the
Córrego
do
Feijão
mine
Vale,
S.A.,
located
in
Ferro-Carvão
stream
watershed
(Brazil),
released
11.7
Mm3
tailings
rich
iron
and
manganese,
2.8
entered
Paraopeba
River
10
km
downstream.
Seeking
to
predict
evolution
environmental
deterioration
river
since
break
on
January
25,
2019,
present
study
generated
exploratory
normative
scenarios
based
predictive
statistical
models,
proposed
mitigating
measures
subsides
ongoing
monitoring
plans.
segmented
into
three
sectors:
"anomalous"
for
distances
≤63.3
from
site,
"transition"
(63.3-155.3
km),
"natural"
(meaning
unimpacted
by
2019;
>155.3
km).
predicted
a
spread
until
reaching
sector
rainy
season
2021,
their
containment
behind
weir
Igarapé
thermoelectric
plant
sector,
dry
season.
Besides,
they
water
quality
changes
vigor
riparian
forests
(NDVI
index)
along
River,
season,
restriction
these
impacts
indicated
exceedances
chlorophyll-a
period
2019-January
2022,
but
not
exclusively
caused
rupture
as
also
occurred
areas
affected
accident.
Conversely,
manganese
clearly
flagged
failure,
persist.
most
effective
measure
is
likely
dredging
currently
it
represents
solely
4.6
%
what
has
river.
Monitoring
paramount
update
system
enters
route
towards
rewilding,
must
include
sediments,
vegetation,
dredging.
Revista Brasileira de Geografia Física,
Journal Year:
2025,
Volume and Issue:
18(1), P. 771 - 787
Published: Jan. 1, 2025
A
bacia
hidrográfica
do
Rio
Paraopeba
localiza-se
na
região
central
estado
de
Minas
Gerais.
O
Reservatório
Retiro
Baixo
foi
construído
no
baixo
curso
a
aproximadamente
300
km
da
Barragem
B1,
onde
os
rejeitos
Mina
Córrego
Feijão
verteram
após
o
rompimento
25
janeiro
2019.
Este
trabalho
avaliou
transporte
fluvial
em
t/ano
pelo
método
estocástico,
para
nutrientes
e
principalmente
metais
Mn,
Cu
Fe
entre
fevereiro
2019
agosto
2022,
tendo
sido
realizadas
dez
amostragens
ponte
Rodovia
MG
420
antes
reservatório.
Para
turbidez,
oxigênio
dissolvido,
manganês,
cobre,
ferro
fósforo
total
algumas
amostras
apresentam
desconformidade
com
legislação
vigente.
Estas
características
também
influenciam
29,18x103
t
Na+,
8,97x103
K+,
7,88x103
SO42-,
9,67x103
NO3-,
1,50x103
PO43-
0,49x103
P
metais,
77,44
0,23
x103
1,37
que
são
anualmente
carreados
transportados
ao
reservatório
Paraopeba.
apresenta
um
complexo
quadro
geológico
pedológico,
uso
terra
diversificado
grande
urbanização,
atividades
industriais,
agrícolas,
pastagens
efluentes,
dentre
outros
que,
juntamente
barragem
B1
altos
índices
pluviométricos
favorecem
aumento
das
vazões
deflúvios
meses
outubro
março,
vem
contribuindo
qualidade
suas
águas.
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2024,
Volume and Issue:
9, P. 100701 - 100701
Published: March 26, 2024
The
Soil
and
Water
Assessment
Tool
(SWAT)
was
used
to
assess
total
phosphorus
concentrations
(TOT-P)
fluxes
(TOT_P)
in
the
Paraopeba
River
basin,
located
state
of
Minas
Gerais,
Brazil,
following
collapse
tailings
dam
B1
Brumadinho.
model
calibrated
validated
for
periods
before
(2000–2018)
after
(2019–2021)
Brumadinho
25
January
2019,
with
great
accuracy
measured
by
various
performance
indicators
(e.g.,
R2
≈
0.8).
flow
phosphorus-containing
sludge
from
iron-ore
explored
Córrego
do
Feijão
Mine
Vale,
SA,
released
break
has
impacted
water
through
large
increments
TOT-P
near
site
(60–100%,
pre-rupture
values
varying
between
0.06
0.1
mg/L).
But
other
major
sources
were
flagged,
namely
urban
Betim
region
that
raised
0.9
mg/L
periodically
during
entire
simulation
period.
study
also
revealed
controls
concentration
coverage
forests
lowered
down
at
0.5–0.8
μg/L.km2.
lowering
rate
was,
however,
dependent
on
occupation
argisols.
As
per
results,
larger
percentage
argisols
a
will
be
surrounding
courses,
meaning
are
prone
erosion
leaching.
A
cluster
analysis
input
terrain
slope,
soil
type)
output
runoff)
variables
SWAT
allowed
relating
surface-
TOT_P
underground-dominant
hydrological
processes,
respectively
runoff
groundwater
flow,
linking
them
specific
environmental
such
as
steep
slopes
first
case
latosols
smooth
landscapes
second
case.
management
implications
retrieved
this
holistic
assessment
discussed.
Finally,
checked
against
Brazilian
standards.
In
regard,
compared
limits
established
Resolution
454/2012
National
Environmental
Council
–
CONAMA.
Some
sub-basins
exhibited
levels
above
legal
threshold,
contamination
viewed
systemic
requiring
immediate
action
implementation
sewage
treatment
best
practices
agriculture),
well
monitoring
spatial
temporal
frames.
existence
extreme
rainfall
events
basin
main
cause
inaccuracies,
overestimated
TOT-P.
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 18, 2025
Abstract
Sediments
in
agricultural
ecosystems
serve
as
critical
indicators
of
environmental
pollution,
particularly
regions
subjected
to
intensive
practices.
This
research
evaluates
the
hazards
and
implications
heavy
metal
(HM)
contamination
river
sediments
from
Sidi
Allal
Tazi
area
within
Morocco’s
Sebou
basin.
Twenty
sediment
samples
were
extracted
strategically
designated
locations,
levels
analyzed
using
a
multi-index
integration
approach,
multi-statistical
analyses
(MSA),
Geographic
Information
Systems
(GIS).
The
results
revealed
considerable
spatial
variability
HM
concentrations,
with
Cd
As
displaying
highest
levels.
Statistical
analysis,
incorporating
Principal
Component
Analysis
(PCA),
identified
anthropogenic
activities
primary
contributors
contamination.
Hierarchical
Cluster
(HCA)
categorized
metals
based
on
common
pollution
pathways,
while
GIS
mapping
distribution
across
vulnerable
areas.
Pollution
like
Geo-accumulation
Index
(Igeo)
well
Load
(PLI).
that
75%
sites
under
“very
high
pollution”,
emphasizing
severity
Contamination
Factor
(CF)
classified
90%
100%
contamination”.
Risk
indices
indicated
significant
ecological
threats,
contributing
an
RI
exceeding
600
many
areas,
signifying
risk”.
These
findings
highlight
urgent
need
for
targeted
mitigation
strategies
sustainable
methodologies
provides
comprehensive
framework
assessing
managing
contamination,
offering
insights
policymakers
managers.
ACS ES&T Water,
Journal Year:
2024,
Volume and Issue:
4(4), P. 1433 - 1442
Published: Jan. 2, 2024
Anthropogenic
heavy
metal
emissions
can
severely
impact
lake
ecosystems.
However,
the
fate
processes
of
metals
and
their
on
aquatic
environment
during
acute
input
events
are
poorly
understood.
To
address
this,
our
study
selected
cadmium
(Cd),
predominant
contaminant
in
Baiyangdian
sediments,
as
a
model
pollutant
to
simulate
within
sediment
microcosms.
We
examined
total
Cd
content
its
fraction
distribution
profile,
revealing
substantial
increase
surface
layer
while
also
identifying
presence
exchangeable
quantifying
mobilization
index.
Notably,
fated
resulted
pronounced
ratio
simultaneously
extracted
acid-volatile
sulfide
0
−4
cm
depth
range,
exceeding
toxic
thresholds
for
benthic
organisms.
By
deploying
diffusive
gradients
thin
films,
we
characterized
variations
bioavailable
with
depth.
Results
indicated
that
surge
concentrations
was
facilitated
by
simultaneous
rise
concentration
dissolved
porewater
sediments.
This
sheds
light
ecological
consequences
events.
