Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: April 10, 2024
The
complexity
of
crude
oil
composition,
combined
with
the
fluctuating
oxygen
level
in
contaminated
environments,
poses
challenges
for
bioremediation
pollutants,
because
compound-specific
microbial
degradation
petroleum
hydrocarbons
under
certain
conditions.
As
a
result,
facultative
bacteria
capable
breaking
down
both
aerobic
and
anaerobic
conditions
are
presumably
effective,
however,
this
hypothesis
has
not
been
directly
tested.
In
current
investigation,
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(6)
Published: June 1, 2024
Priming
of
soil
organic
matter
(SOM)
decomposition
by
microorganisms
is
a
key
phenomenon
global
carbon
(C)
cycling.
Soil
pH
main
factor
defining
priming
effects
(PEs)
because
it
(i)
controls
microbial
community
composition
and
activities,
including
enzyme
(ii)
defines
SOM
stabilization
destabilization
mechanisms,
(iii)
regulates
intensities
many
biogeochemical
processes.
In
this
critical
review,
we
focus
on
prerequisites
mechanisms
PE
depending
assess
the
change
consequences
for
PE.
The
highest
PEs
were
common
in
soils
with
between
5.5
7.5,
whereas
low
molecular
weight
compounds
triggered
mainly
slightly
acidic
soils.
Positive
up
to
20
times
before
C
input
at
around
6.5.
Negative
below
4.5
or
above
7
reflecting
suboptimal
environment
specific
high
pH.
Short-term
acidification
(in
rhizosphere,
after
fertilizer
application)
affects
by:
mineral-SOM
complexation,
oxidation
iron
reduction,
enzymatic
depolymerization,
pH-dependent
changes
nutrient
availability.
Biological
processes
metabolism
shift
over
short-term,
long-term
adaptations
slow
are
common.
nitrogen
fertilization
induced
land
use
intensification
strongly
decrease
thus
boost
Concluding,
one
strongest
but
now
disregarded
factors
PE,
through
short-term
metabolic
adaptation
groups
communities.
Eco-Environment & Health,
Journal Year:
2024,
Volume and Issue:
3(1), P. 59 - 76
Published: Jan. 3, 2024
Soil,
the
largest
terrestrial
carbon
reservoir,
is
central
to
climate
change
and
relevant
feedback
environmental
health.
Minerals
are
essential
components
that
contribute
over
60%
of
soil
storage.
However,
how
interactions
between
minerals
organic
shape
transformation
stability
remains
poorly
understood.
Herein,
we
critically
review
primary
mechanisms,
including
sorption,
redox
reaction,
co-precipitation,
dissolution,
polymerization,
catalytic
reaction.
These
interactions,
highly
complex
with
combination
multiple
processes,
greatly
affect
through
following
processes:
(1)
formation
or
deconstruction
mineral-organic
association;
(2)
oxidative
minerals;
(3)
polymerization
(4)
varying
association
according
mineral
transformation.
Several
pieces
evidence
related
turnover
during
interaction
in
real
eco-environment
then
demonstrated.
We
also
highlight
current
research
gaps
outline
priorities,
which
may
map
future
directions
for
a
deeper
mechanisms-based
understanding
storage
capacity
considering
its
minerals.
Interactions
between
manganese
dioxides
(MnO2)
and
dissolved
organic
matter
(DOM)
have
long
been
the
subject
of
scientific
inquiry.
However,
effect
MnO2
crystallinity
on
DOM
fate
remains
unclear.
Herein,
we
comprehensively
investigate
adsorption,
protection,
mineralization
by
with
various
crystallinities
(order
crystallinity:
γ-30
<
γ-90
γ-120).
The
results
show
that
adsorption
is
positively
correlated
specific
surface
area
(SSA)
MnO2;
largest
SSA
adsorbs
highest
amount
DOM,
resulting
in
protection.
γ-120
a
smaller
could
induce
Maillard
reaction
thereby
promote
formation
geopolymerized
matter,
leading
to
reduced
bioavailability
DOM.
Furthermore,
capability
mineralize
decreases
order
>
γ-30,
it
determined
both
Mn4+
hydroxyl
radical
(·OH)
content.
In
particular,
contribution
radical-based
oxidation
·OH
64.8,
47.4,
23.7%
for
γ-90,
γ-120,
respectively.
We
propose
may
significant
but
hitherto
unexplored
influence
global
carbon
cycle
over
geological
time.
npj Materials Sustainability,
Journal Year:
2023,
Volume and Issue:
1(1)
Published: Nov. 27, 2023
Abstract
Reactive
primary
and
secondary
minerals
play
a
critical
role
in
the
transformation
stabilization
of
organic
matter
(OM)
soil,
aspect
that
has
been
largely
overlooked
existing
literature.
In
this
regard,
we
propose
new
model
known
as
“reactive
mineral
sink”
(RMS)
to
illustrate
three
mechanisms
through
which
these
drive
bioprocessing,
transformation,
transport
OM
soil.
Firstly,
from
biological
perspective,
reactive
influence
enzymatic
microbial
processing
binding
proteins
or
influencing
structure
communities.
Secondly,
chemical
standpoint,
have
capacity
adsorb
and/or
coprecipitate
with
it,
leading
more
diverse
distribution
This
distribution,
turn,
triggers
catalysis
redox
reactions.
Thirdly,
on
physical
level,
substantial
impact
soil
architecture,
aggregate
dynamics,
porosity
development,
hydrological
processes.
These
changes
then
affect
transport,
reprocessing
OM.
The
RMS
provides
conceptual
framework
underscores
fundamental
driving
dynamics
carbon
(C)
sequestration
natural
Furthermore,
it
promotes
restoration
biogeochemical
processes
ecological
resilience.
We
advocate
for
implementation
strategies
based
enhance
C
soils
purposes
rejuvenating
health
mitigating
CO
2
emission.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(49), P. 20871 - 20880
Published: Nov. 29, 2023
Organic
acid
is
prevalent
in
underground
environments
and,
against
the
backdrop
of
biogeochemical
cycles
on
Earth,
holds
significant
importance
degradation
contaminants
by
redox-active
minerals.
While
earlier
studies
role
organic
generation
reactive
oxygen
species
(ROS)
primarily
concentrated
electron
shuttle
or
ligand
effects,
this
study
delves
into
combined
impacts
decomposition
and
Mackinawite
(FeS)
oxidation
contaminant
transformation
under
dark
aerobic
conditions.
Using
bisphenol
A
(BPA)
as
a
model,
our
findings
showed
that
oxalic
(OA)
notably
outperforms
other
acids
enhancing
BPA
removal,
attaining
rate
constant
0.69
h-1.
Mass
spectrometry
characterizations,
coupled
with
anaerobic
treatments,
advocate
for
molecule-O2
activation
principal
mechanism
behind
pollutant
transformation.
Comprehensive
results
unveiled
carbon
center
radicals,
initiated
hydroxyl
radical
(•OH)
attack,
serve
primary
agents
oxidation,
accounting
at
least
93.6%
total
•OH
generation.
This
dynamic,
driven
concurrent
formation
carbon-centered
ensures
steady
supply
electrons
ROS
The
obtained
information
highlights
OA
natural
attenuation
pollutants
offers
innovative
strategies
FeS
acid-coupled
decontamination.
