Trends in Sciences,
Год журнала:
2024,
Номер
21(6), С. 7604 - 7604
Опубликована: Апрель 10, 2024
Although
tin
mining
activities
in
the
southern
part
of
Thailand
have
been
abandoned
for
more
than
40
years,
arsenic
contamination
old
tin-mining
areas
continues
to
pose
a
health
risk.
Fortunately,
natural
adsorption
by
sediment
has
reduced
concentration
water
maximum
allowable
level
within
10-kilometre
radius
mine
sources.
This
article
attempts
characterize
properties
along
creek
which
passes
through
tin-mine
Ron
Phibun
district,
Nakhon
Si
Thammarat
province,
Thailand,
where
most
severe.
It
was
found
that
Fe
tends
be
associated
with
capacity
sediment.
However,
pH
4
and
7
did
not
associate
capacity.
At
12,
solubility
increases,
making
it
less
likely
adsorbed
into
dissolve
water.
For
isotherms
sediment,
so-called
‘2-step
Langmuir/Freundlich
models’,
advance
switching
functions
(Logistic
or
Arctan
functions),
were
proposed.
Then,
based
on
principle
parsimony,
stepwise
model
reduction
approach
used
choose
optimal
models.
successfully
describe
historical
arsenic-contamination
data
past
14
years
(2005
-
2019)
predict
future
trends
qualitatively.
HIGHLIGHTS
Two-step
models
proposed
The
examined
described
as
function
metal-complex
formation
soils
GRAPHICAL
ABSTRACT
Ecotoxicology and Environmental Safety,
Год журнала:
2023,
Номер
268, С. 115700 - 115700
Опубликована: Ноя. 16, 2023
Arsenic
(As)
is
a
toxic
non-essential
metal.
Its
accumulation
in
rice
has
not
only
seriously
affected
the
growth
of
rice,
but
also
poses
significant
threat
to
human
health.
Many
reports
have
been
published
decrease
arsenic
plant
by
various
additives
such
as
chemicals,
fertilizers,
adsorbents,
microorganisms
and
analyzing
mechanism.
Nanobubble
new
technology
widely
used
agriculture
because
its
long
existence
time
high
mass
transfer
efficiency.
However,
few
studies
investigated
effect
nanobubbles
on
uptake
rice.
This
study
oxygen
As
The
could
rupture
salinity
nutrients
produce
hydroxyl
radical.
radical
caused
oxidation
As(III)
(V)
ferrous
ions.
At
same
time,
oxidized
iron
adsorbing
created
plaque
roots
stop
introduction
into
plant.
results
indicated
that
treatment
increased
biomass
under
stress,
while
they
chlorophyll
content
promoted
photosynthesis.
Oxygen
reduced
12.5%
shoots
46.4%.
In
other
words,
it
significantly
decreased
Overall,
mitigated
effects
had
potential
reduce
Plant and Soil,
Год журнала:
2023,
Номер
497(1-2), С. 175 - 197
Опубликована: Ноя. 21, 2023
Abstract
Background
and
Aims
Bioremediation
of
soils
contaminated
with
metal(loid)s
is
an
attractive
research
area
due
to
its
sustainability
economic
benefits.
In
the
Slovak
Republic,
there
are
several
abandoned
mines
containing
high
concentrations
arsenic
(As)
antimony
(Sb).
This
calls
for
new
options
removing
these
hazardous
metalloids
from
substrates.
Studies
on
bioleaching
co-contaminated
both
very
rare.
study
aimed
test
effectiveness
heavily
As
Sb
(up
1463
mg.kg
–1
5825
,
respectively)
at
a
former
stibnite
mining
site
(Poproč,
eastern
Slovakia)
through
biostimulation
bioaugmentation.
Methods
Bioleaching
four
was
induced
by
autochthonous
microflora
Sabouraud
medium
(SAB)
SAB+glucose,
bioaugmentation
soil
bacterial
strains
Cupriavidus
oxalaticus
metallidurans
.
Soil
samples
were
subjected
determination
physico-chemical
properties,
microbiological
parameters,
additional
mineralogical
analysis.
Results
An
inverse
relationship
between
total
metalloid
concentration
microbial
diversity
confirmed.
experiments
mean
bioleached
fractions
37.6%
41.3%,
while
significantly
lower,
ranging
17.0–26.2%.
The
fraction
using
SAB
40.7%
14.4%,
respectively.
addition
glucose
increased
(50.7%)
but
not
that
Sb.
Conclusion
Collectively,
results
highlighted
role
microorganisms
in
mobility
their
prospective
applications
remediation
sites.
Trends in Sciences,
Год журнала:
2024,
Номер
21(6), С. 7604 - 7604
Опубликована: Апрель 10, 2024
Although
tin
mining
activities
in
the
southern
part
of
Thailand
have
been
abandoned
for
more
than
40
years,
arsenic
contamination
old
tin-mining
areas
continues
to
pose
a
health
risk.
Fortunately,
natural
adsorption
by
sediment
has
reduced
concentration
water
maximum
allowable
level
within
10-kilometre
radius
mine
sources.
This
article
attempts
characterize
properties
along
creek
which
passes
through
tin-mine
Ron
Phibun
district,
Nakhon
Si
Thammarat
province,
Thailand,
where
most
severe.
It
was
found
that
Fe
tends
be
associated
with
capacity
sediment.
However,
pH
4
and
7
did
not
associate
capacity.
At
12,
solubility
increases,
making
it
less
likely
adsorbed
into
dissolve
water.
For
isotherms
sediment,
so-called
‘2-step
Langmuir/Freundlich
models’,
advance
switching
functions
(Logistic
or
Arctan
functions),
were
proposed.
Then,
based
on
principle
parsimony,
stepwise
model
reduction
approach
used
choose
optimal
models.
successfully
describe
historical
arsenic-contamination
data
past
14
years
(2005
-
2019)
predict
future
trends
qualitatively.
HIGHLIGHTS
Two-step
models
proposed
The
examined
described
as
function
metal-complex
formation
soils
GRAPHICAL
ABSTRACT
