Biochar,
Journal Year:
2024,
Volume and Issue:
6(1)
Published: June 25, 2024
Abstract
Hydrothermal
carbonization
(HTC)
has
been
regarded
as
a
promising
technique
for
turning
wet
biomass
into
hydrochar
due
to
its
low
energy
consumption,
exhaust
gas
emissions,
etc.
In
addition,
is
an
important
source
of
dissolved
organic
matter
(DOM),
which
plays
crucial
part
in
the
migration
and
destiny
pollutants
environmental
medium.
However,
there
are
limited
studies
that
focus
on
factors
influence
formation
DOM
hydrochar,
such
hydrothermal
temperature.
Therefore,
current
study
comprehensively
characterized
optical
properties
within
derived
from
sawdust
(HDOM)
under
different
temperatures
(150–300
°C)
by
Ultraviolet–visible
(UV–Vis)
fluorescence
spectroscopy,
well
complexation
characteristic
with
Cu(II).
The
findings
revealed
carbon
content
HDOM
reached
peak
37.3
mg
L
−1
when
temperature
rose
240
°C
then
decreased
increased.
UV–Vis
spectroscopy
analysis
showed
absorption
capacity
at
275
nm
increases
reaches
maximum
value
°C,
indicating
high
promotes
monocyclic
aromatic
compounds.
High
enhances
aromaticity,
hydrophobicity,
humification
degree
HDOM,
thus
improving
stability
aromaticity.
E3/E4
ratios
all
greater
than
3.5,
confirming
main
component
fulvic
acid,
corresponds
3D-EEM
Pearson's
correlation
coefficient
analysis.
index
(HIX)
increased
rise
(150–240
°C),
observed
three-dimensional
excitation-emission
matrix
(3D-EEMs).
After
reaching
HIX
gradually
dropped
line
trend
DOC
change.
Moreover,
bioavailability
(BIX)
was
1,
readily
bioavailable.
Two
microbial
humic
substances
(C1
C4),
humic-like
substance
(C2),
protein-like
(C3)
were
discovered
integrating
3D-EEMs
parallel
factor
(PARAFAC).
Their
intensity
decreases
Cu(II)
concentration
increases,
complexes
As
rises,
binding
ability
changes
significantly,
optimum
300
°C.
Meanwhile,
C2
strongest
This
research
emphasizes
significance
determining
evolution
hydrochar-derived
DOM,
potential
heavy
metal
migration,
characteristics
features.
Graphical
Environmental Science & Technology,
Journal Year:
2022,
Volume and Issue:
56(4), P. 2783 - 2793
Published: Jan. 27, 2022
In
soil
environments,
the
sequestration
and
transformation
of
organic
carbon
are
closely
associated
with
minerals.
Birnessite
(MnO2)
is
known
to
strongly
interact
dissolved
matter
(DOM),
but
microscopic
distribution
molecular
DOM
on
birnessite
still
poorly
understood.
this
study,
coupled
sorption
oxidation
were
investigated
at
both
scale
level.
Spherical
aberration
corrected
scanning
transmission
electron
microscopy
(Cs-STEM)
results
revealed,
nano-
sub-nanoscale,
that
was
located
surfaces
within
interflakes
or
pore
spaces
birnessite,
displayed
a
higher
state
than
surfaces.
Fourier
transform
ion
cyclotron
resonance
mass
spectrometry
(FT-ICR-MS)
suggested
portion
phenolic
compounds
preferentially
sorbed
oxidized,
resulting
in
formation
oxygen
contents
polymeric
products.
Our
Cs-STEM
FT-ICR-MS
highlighted
significance
organo-mineral
associations
mineral
structure
for
reactivity
provided
evidence
by
which
contributed
understanding
dynamics
carbon.
Environmental Science & Technology,
Journal Year:
2022,
Volume and Issue:
56(9), P. 5910 - 5919
Published: April 7, 2022
As
extremely
active
sites
processing
terrestrially
derived
dissolved
organic
matter
(DOM),
lakes
deserve
sufficient
attention.
Because
of
high-complexity
interactions
between
DOM
and
the
surrounding
environment,
natural
anthropogenic
drivers
controlling
composition
chemodiversity
molecules
in
remain
unclear.
Here,
13,952
were
identified
assessed
45
across
China
via
ultrahigh-resolution
mass
spectrometry.
Furthermore,
effects
both
factors
on
composition,
chemodiversity,
greenhouse
gas
emissions
investigated.
The
majority
variations
chemical
could
be
attributed
to
differences
hydrology
nutrient
concentrations
lakes,
human
activities
also
played
a
role,
mainly
through
atmospheric
pollution.
Environmental
influenced
form
S-containing
compounds.
N-containing
compounds
exhibited
positive
correlation
with
CO2
emissions,
while
N-
S-free
N2O
emissions.
These
results
facilitate
comprehensive
understanding
lake
thereby
providing
reference
for
formulation
strategies
aimed
at
harmonious
development
environments.
Environmental Science & Technology,
Journal Year:
2022,
Volume and Issue:
56(18), P. 12793 - 12810
Published: Aug. 29, 2022
Soil
organic
matter
(SOM)
comprises
a
continuum
of
materials
from
granular
debris
to
small
molecules
and
contains
more
carbon
than
global
vegetation
the
atmosphere
combined.
It
has
remarkable
effects
on
soil
ecological
functions
cycle
as
well
fate
pollutants
in
terrestrial
ecosystem.
Therefore,
characterization
SOM
is
an
important
topic
science,
ecology,
environmental
science.
Chemical
complexity
spatial
heterogeneity
are
by
far
two
biggest
challenges
our
understanding
SOM.
Recent
developments
analytical
techniques
methods
provide
opportunity
reveal
composition
at
molecular
level
observe
its
distribution
soils
micro-
nanoscales,
which
have
greatly
improved
This
paper
reviews
outstanding
advances
regarding
these
issues
target
nontarget
analyses
comprising
marker
analysis,
ultrahigh-resolution
mass
spectrometry
situ
microscopic
imaging
such
synchrotron-based
spectromicroscopy,
nanoscale
secondary
ion
spectrometry,
emerging
electron
optical
techniques.
However,
current
remain
unlocking
unknown
properties
We
systematically
point
out
limitations
technologies
outline
future
prospects
for
comprehensive
paying
particular
attention
concern.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(20), P. 7753 - 7763
Published: May 10, 2023
Dissolved
organic
matter
(DOM)
is
crucial
for
the
carbon
biogeochemical
cycle
and
has
a
close
link
with
microbiome
in
aquatic
ecosystems;
however,
causal
relationship
between
DOM
microbial
diversity
inland
waters
not
very
clear
so
far.
Therefore,
national
survey
of
China's
was
conducted,
chemical
composition
community
were
determined
by
Fourier
transform
ion
cyclotron
resonance
mass
spectrometry
high-throughput
sequencing
to
clarify
abovementioned
question.
Here,
we
found
that
chemodiversity
governed
assembly
waters,
vice
versa.
Under
control
biogeography,
showed
geographical
distribution
difference.
Water
mainly
constrained
bacterial
archaeal
composition,
whereas
sediment
controlled
eukaryotic
fungal
composition.
In
addition,
also
affected
interaction
different
groups
sediments.
The
study
first
proposes
regulatory
mechanism
on
pattern
chemodiversity,
thus
further
deepening
understanding
cycle.
Critical Reviews in Environmental Science and Technology,
Journal Year:
2023,
Volume and Issue:
53(21), P. 1912 - 1934
Published: March 31, 2023
Biochar-derived
dissolved
organic
matter
(BDOM)
plays
key
roles
in
soil
ecosystem
by
affecting
physicochemical
and
biological
properties
supplying
nutrients
to
microbes.
It
can
either
enhance
or
suppress
the
growth
of
certain
microorganisms,
depending
on
its
composition
content
labile
compounds.
This
review
aims
discuss
summarize
role
BDOM
modifying
microbial
functioning,
community
structure,
enzymatic
activity.
We
mainly
focus
as
a
function
concentration,
type
feedstock
biomass,
pyrolysis
temperature
(PT).
Results
show
that
saw
dust-
manure-based
biochars
produce
higher
concentrations
than
straw-,
bone-,
sludge-based
biochars.
The
types
biomass
PT
determine
characteristics
interaction
with
communities.
Plant-derived
biochar
≤300
°C
often
results
more
aliphatic
≥500
°C,
which
yields
aromatic
BDOM.
plant
contains
specific
ultraviolet
absorbance
(SUVA)
humification
index
(HIX)
manure
biochar.
SUVA
HIX
positively
correlate
(R2=0.68–0.96)
total
fatty
acid
methyl
esters,
but
negatively
abundances
actinomycetes,
arbuscular
mycorrhizae,
fungal
However,
environmental
fate
amended
requires
long-term
experiment,
both
laboratory
field
scales,
provide
full
understating
microorganisms
help
tailor
safe
utilization
agroecosystems.
