Доклады РОССИЙСКОЙ АКАДЕМИИ НАУК Науки о Земле,
Journal Year:
2024,
Volume and Issue:
517(1), P. 179 - 188
Published: Dec. 13, 2024
It
was
previously
established
that
soil
drying
changes
their
properties
and,
in
particular,
the
characteristics
of
a
specific
organic
substance
–
humic
substances
(HS).
HS
is
basis
organomineral
gels
cover
and
bind
particles.
When
water
removed
from
soil,
hydrophobization
compression
occur,
as
result
which
samples
may
change.
The
restoration
air-dry
should
reduce
discrepancy
between
data
obtained
when
studying
dried
non-dried
samples.
purpose
work
to
find
ways
restore
structure
gels.
Samples
6
types
soils
were
studied.
Methods
vibration
viscometry,
laser
diffractometry,
scanning
electron
microscopy
(SEM),
photocolorimetry
conductometry
used
work.
has
been
found
increases
size
supramolecular
formations
(SMFs)
reduces
viscosity
pastes,
parameter
characterizing
ability
swell.
To
gels,
it
proposed
SMFs
initial
ones.
separation
carried
out
by
moistening
subsequent
treatment
with
various
influences:
temperature,
ultrasound
freezing.
Using
SEM,
shown
heating
do
not
reduce,
but
increase
SMFs.
Humidification
soils,
exposure
moisture
for
2
weeks
freezing
bring
pastes
number
studied
closer
condition
have
dried.
This
process
occurs
due
return
values
evidenced
on
distribution
suspended
particles
diffractometer.
Thus,
method
restoring
gel
structures
state
original
proposed.
Heliyon,
Journal Year:
2025,
Volume and Issue:
11(4), P. e42390 - e42390
Published: Feb. 1, 2025
Highlights•Frontal
affinity
chromatography
on
humic
acid-supported
stationary
phase•Benzophenone
retained
by
immobilized
acid•Concentration-dependent
retardation
enables
computing
binding
and
capacity•Cu(II)
monolithic
support
is
a
versatile
platform
to
immobilize
acid
reversiblyAbstractThe
principles
of
frontal
were
used
determine
the
sorption
constants
capacities
benzophenone
acid.
Poly(glycidyl-co-ethylene
dimethacrylate)
monoliths
constructed
inside
microbore
capillaries
(12
cm
long
×
1.016
mm
internal
diameter)
further
aminated
with
ethylenediamine.
The
free
amine
groups
coordinated
Cu(II),
which
served
as
an
intermediate
ligand
about
27.2
28.7
mg
per
gram
polymer
skeleton
(or
93
±
4
μg
column).
reversible
nature
interactions
Cu(II)
allowed
leach
reload
acid,
thus
suggesting
that
single
modified
column
may
be
explored
acids
from
different
sources
using
concept
exchangeable
chemistries
stable
platform.
Frontal
chromatograms
obtained
injecting
1000
μL
solutions
various
concentrations
(1.11
112
μmol
L-1)
at
25°C
pH
7.00
0.1.
concentration-dependent
elution
volume
enabled
construction
isotherms
fitted
Langmuir
Freundlich
equations
linearized
Scatchard
plot.
substance
was
ruled
two
classes
interaction
sites
=
(1.2
0.2)
106
(6.7
±0.8)
103
L
mol-1
maximum
capacity
19.2
1.2
g-1.
results
correspond
average
duplicate
injections
in
three
columns,
demonstrating
acceptable
reproducibility
stability
proposed
methodology.Graphical
abstract
ACS Omega,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 11, 2025
Humic
substances
(HSs)
play
a
crucial
role
in
soil
health
and
have
potential
applications
beyond
agriculture.
This
study
evaluates
the
renewable
raw
materials
such
as
compost
from
urban
green
waste
(GWC)
spent
coffee
grounds
(SCG)
sources
of
humic-like
(HLSs),
which
may
be
an
alternative
to
traditional
resources
peat,
lignite,
leonardite.
The
quantitative
analysis
focused
on
modeling
optimizing
efficiency
ultrasound-assisted
extraction
acids
(HLAs)
function
time,
ultrasound
intensity,
extractant
concentration
(NaOH),
temperature.
Experimental
points
were
determined
based
experimental
matrix
according
fractional
factorial
design
(FFD),
obtained
polynomial
models
evaluated
using
Fisher
test,
lack
fit
assessment,
determination
coefficients.
verification
with
optimal
values
parameters
demonstrated
possibility
extracting
HLAs
GWC
SCG
at
levels
27.08
19.11%,
respectively.
qualitative
included
fulvic-like
their
comparison
reference
samples.
Spectroscopic
methods
(UV-vis,
ATR-FTIR,
CP/MAS,
13C
NMR)
well
elemental
(CHNSO)
used
this
part
study.
results
showed
presence
functional
groups
characteristic
humic
(polysaccharides,
phenols,
alcohols,
amides)
molecular
structure
products.
Additionally,
they
exhibited
higher
content
nitrogen
sulfur
compared
commercial
samples,
lower
hydrophobicity,
indicate
biological
activity.
Royal Society of Chemistry eBooks,
Journal Year:
2024,
Volume and Issue:
unknown, P. 353 - 380
Published: March 4, 2024
Biochar,
a
carbonaceous
material,
has
emerged
as
valuable
tool
for
environmental
remediation
and
soil
fertility
enhancement.
Its
activity
–
i.e.,
its
ability
to
either
change
properties
or
affect
the
fate
of
organic
inorganic
pollutants
depends
on
both
physical
chemical
characteristics.
The
most
recent
literature
evidenced
that
conventional
analyses
are
insufficient
fully
understand
biochar’s
functionality
in
compartments.
Therefore,
new
more
sophisticated
technologies
needed
unveil
mechanisms
underlying
actions.
In
this
chapter,
different
NMR
techniques
biochar
evaluation
presented,
limitations
advantages
each
technique
discussed.
Agriculture,
Journal Year:
2023,
Volume and Issue:
13(12), P. 2241 - 2241
Published: Dec. 5, 2023
Knowledge
of
the
effects
different
organic
species
on
soil
structure
and
strength
is
gained
mostly
from
experiments
natural
soils
amended
with
substances
various
particle
sizes,
pH,
ionic
composition,
inorganic
impurities.
It
greatly
diversifies
experimental
results
shadows
individual
amendments.
Therefore,
to
look
for
a
clearer
view,
we
examined
impact
HCl-washed
clay-size
species:
peat,
humic
acids,
residue
after
acid
extraction,
two
biochars,
all
derived
same
peat
having
similar
particles,
artificial
silt
aggregates
using
mercury
intrusion
porosimetry,
bulk
density
measurements,
SEM,
uniaxial
compression.
Bulk
increased
due
addition
decreased
other
The
total
pore
volumes
behaved
oppositely.
All
except
surface
fractal
dimension,
indicating
smoothening
surface.
Humic
appeared
occupy
spaces
between
grains
skeleton,
while
were
also
located
upon
grains.
latter
effect
was
most
evident
600
°C
heated
biochar.
acid,
extraction
improved
mechanical
stability,
whereas
both
biochars
weakened
aggregates,
which
means
that
plays
smaller
role
in
stability
granular
materials,
as
it
usually
considered.
A
new
equation
relating
maximum
stress
amount
additives
proposed.
Biomimetics,
Journal Year:
2023,
Volume and Issue:
8(8), P. 613 - 613
Published: Dec. 15, 2023
Various
processes
designed
for
the
humification
(HF)
of
animal
husbandry
wastes,
primarily
bird
droppings,
reduce
their
volumes,
solve
environmental
problems,
and
make
it
possible
to
obtain
products
with
artificially
formed
humic
substances
(HSs)
as
analogues
natural
HSs,
usually
extracted
from
fossil
sources
(coal
peat).
This
review
studies
main
characteristics
various
biological
physicochemical
methods
HF
wastes
(composting,
anaerobic
digestion,
pyrolysis,
hydrothermal
carbonation,
acid
or
alkaline
hydrolysis,
subcritical
water
extraction).
A
comparative
analysis
rates
HS
yields
in
these
processes,
resulting
artificial
HSs
(humification
index,
polymerization
degree
aromaticity,
etc.)
was
carried
out.
The
factors
(additives,
process
conditions,
waste
pretreatment,
that
can
increase
efficiency
affect
properties
are
highlighted.
Based
on
results
chemical
composition
analysis,
trends
preferences
regard
use
complex
biomimetics
discussed.
