Limnological Review,
Journal Year:
2024,
Volume and Issue:
24(4), P. 406 - 436
Published: Oct. 12, 2024
Water
pollution
is
a
pressing
global
issue
significantly
affecting
ecosystem
health,
biodiversity,
and
human
well-being.
While
numerous
studies
have
concentrated
on
toxic
metals
like
cadmium,
lead,
mercury,
essential
such
as
copper
zinc
often
receive
less
attention.
This
review
focuses
the
distribution
occurrence
of
in
surface
water,
their
accumulation
freshwater
organisms,
potential
strategies
for
mitigating
environmental
pressure
caused
by
these
metals.
Zinc
concentrations
uncontaminated
usually
range
from
3
to
12
μg∙L−1
form
low-bioavailable
hydroxo-complexes
that
are
especially
stable
weak
alkaline
water.
The
concentration
trend
globally
Europe
>
Africa
Asia
South
America
North
America.
Conversely,
vary
0.2
5.5
µg∙L−1,
with
order
being
Europe.
Humic
substances
likely
predominant
ligands
environments.
animals
may
not
be
reliable
indicator
metal
due
metabolic
regulation.
Bioremediation
approaches,
including
phytoremediation
biosorption
using
plants
microorganisms,
show
promise
addressing
water
contamination.
Future
research
should
emphasize
advanced
bioremediation
methods,
emission
reduction
strategies,
refined
modeling
techniques
predict
trends
evaluate
remediation
effectiveness.
Microorganisms,
Journal Year:
2025,
Volume and Issue:
13(1), P. 174 - 174
Published: Jan. 15, 2025
This
study
investigates
the
potential
of
microbial-induced
calcium
carbonate
precipitation
(MICP)
for
soil
stabilization
and
heavy
metal
immobilization,
utilizing
landfill
leachate-derived
ureolytic
consortium.
Experimental
conditions
identified
yeast
extract-based
media
as
most
effective
bacterial
growth,
urease
activity,
calcite
formation
compared
to
nutrient
broth
brown
sugar
media.
Optimal
MICP
conditions,
at
pH
8–9
30
°C,
supported
efficient
biomineralization.
The
process
facilitated
removal
Cd2+
(99.10%)
Ni2+
(78.33%)
while
producing
stable
crystals
that
enhanced
strength.
Thermal
analyses
(thermogravimetric
analysis
(TGA)
differential
scanning
calorimetry
(DSC))
confirmed
successful
production
CaCO3
its
role
in
improving
stability.
DSC
revealed
endothermic
exothermic
peaks,
including
a
significant
peak
444
corresponding
thermal
decomposition
into
CO2
CaO,
confirming
formation.
TGA
results
showed
steady
weight
loss,
consistent
with
breakdown
CaCO3,
supporting
carbonates.
treatment
significantly
increased
strength,
highest
surface
strength
observed
440
psi,
correlating
content
(18.83%).
These
findings
underscore
effectiveness
stabilization,
pollutant
removal,
geotechnical
properties.
Toxics,
Journal Year:
2024,
Volume and Issue:
12(2), P. 107 - 107
Published: Jan. 27, 2024
Mining
waste
represents
a
global
issue
due
to
its
potential
of
generating
acidic
or
alkaline
leachate
with
high
concentrations
metals
and
metalloids
(metal(loid)s).
Microbial-induced
calcium
carbonate
precipitation
(MICP)
is
an
engineering
tool
used
for
remediation.
MICP,
induced
via
biological
activity,
aims
precipitate
(CaCO3)
co-precipitate
other
metal
carbonates
(MCO3).
MICP
bio-geochemical
remediation
method
that
immobilize
remove
metal(loid)s
enzyme,
redox,
photosynthetic
metabolic
pathways.
Contaminants
are
removed
directly
through
immobilization
as
mineral
precipitates
(CaCO3
MCO3),
indirectly
(via
sorption,
complexes,
inclusion
into
the
crystal
structure).
Further,
CaCO3
deposited
on
surface
within
pore
spaces
solid
matrix
create
clogging
effect
reduce
contaminant
leachate.
Experimental
research
has
shown
promise
bioremediation
technique
mining
waste.
Additional
required
evaluate
long-term
feasibility
by-products
MICP-treated/stabilized
