Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 1, 2025
Increased
awareness
of
pervasive
per-
and
polyfluoroalkyl
substances
(PFAS)
contamination
the
need
for
zero-pollution
treatment
solutions
necessitate
scientific
engineering
community
to
respond
urgently
systematically.
Existing
approaches
lack
reproducible
standardized
methods
report
technological
capabilities.
Consequently,
it
is
difficult
compare
innovations
accurately
assess
their
potential.
In
this
Perspective,
we
shed
light
on
hurdles
encountered
in
lab-scale
research
development
aqueous
PFAS
destruction
technologies
with
a
focus
chemical
offer
recommendations
overcoming
them.
Best
practices
are
provided
developing
robust
laboratory
protocols
covering
crucial
aspects
such
as
experimental
planning,
sample
storage
analysis,
waste
management.
Further,
present
five
criteria
standardize
reporting
performance
advances
degrading
technologies:
1)
scope,
2)
defluorination
efficiency,
3)
relative
energy
consumption,
4)
material
stability,
5)
unit
process
considerations.
Through
dissemination
these
insights,
aim
foster
progress
highly
effective
solutions.
Water,
Год журнала:
2023,
Номер
15(10), С. 1853 - 1853
Опубликована: Май 13, 2023
Contaminants
of
emerging
concern
(CECs)
are
chemicals
or
materials
that
not
under
current
regulation
but
there
increasing
concerns
about
their
possible
occurrence
in
the
environment
because
potential
threat
to
human
and
environmental
health,
with
wastewater
perceived
as
primary
source.
Although
various
techniques
for
removal
from
water
have
been
studied,
it
should
be
emphasized
choice
also
consider
use
resources
energy
within
processes,
which
must
minimized
avoid
additional
carbon
footprints
impact.
In
this
context,
biomass-based
sorbents
might
represent
a
cost-effective
environmentally
friendly
approach
CECs
they
based
on
preferably
local
renewable
lower
negative
impacts
global
cycle
through
greenhouse
gas
emissions
than
conventional
nonrenewable
ones.
This
paper
provides
an
overview
studies
dealing
application
such
so-called
biosorbents
discusses
different
forms:
after
minimal
pretreatment
original
lignocellulosic
biomass;
extracted
biomass
and/or
modified;
biochar-based
obtained
thermochemical
conversion
biomass.
It
explains
modifications
efficiency
selected
compounds
belong
classes
pharmaceuticals,
personal
care
products,
pesticides
compares
adsorption
capacities,
kinetic
models,
mechanisms
reported
relevant
literature.
Biochar-based
sorption
has
studied
more
often
if
compared
other
considered
biosorbents.
some
cases,
efficiencies
contaminants
greater
90%
were
achieved,
nonetheless
wide
range
indicates
successful
simultaneous
multicompound
removal,
combination
processes
seems
appropriate
stand-alone
Finally,
review
reasons
behind
limited
commercial
directions
further
research,
particular
spent
perspective
circular
systems.
Environmental Pollution,
Год журнала:
2024,
Номер
346, С. 123575 - 123575
Опубликована: Фев. 14, 2024
We
have
investigated
the
occurrence,
distribution,
and
biomagnification
of
per-
polyfluoroalkyl
substances
(PFAS)
in
two
tropical
lakes
(Asejire
Eleyele)
Southwestern
Nigeria,
with
contrasting
urban
intensities.
Over
an
8-month
period,
we
sampled
sediment
fish
species
(Clarias
gariepinus:
CIG;
Oreochromis
niloticus:
ON;
Coptodon
guineensis:
CG;
Sarotherodon
melanotheron:
SM)
across
trophic
levels,
analyzed
various
PFAS
congeners,
addition
to
a
select
group
toxicological
responses.
While
herbivores
(SM)
benthic
omnivores
(CIG)
at
Asejire
exhibited
elevated
levels
PFBS
PFOS,
pelagic
(ON)
showed
dominance
PFDA,
PFHxDA
EtFOSE
muscle.
At
Eleyele
lake,
patterns
was
dominated
by
PFBS,
EtFOSE,
PFPeS,
PFOcDA
PFOS
(SM,
CG),
omnivore
(ClG).
The
estimated
factor
(BMF)
analysis
for
both
indicated
level
increase
PFUnA
PFDA
suburban
while
biomagnified
lake.
detected
occurrence
diSAMPAP
9CL-PF3ONS,
novel
compounds
not
commonly
reported,
studies
lakes.
studied
responses
varied
groups
probable
modulations
environmental
conditions,
structure,
relative
exposures
present
study
documents,
first
time
or
any
other
African
country,
role
urbanization
on
contaminant
load
into
environment
their
implications
dynamics
within
ecosystem
aquatic
food
safety.
The Science of The Total Environment,
Год журнала:
2024,
Номер
922, С. 170971 - 170971
Опубликована: Фев. 24, 2024
Sustainable
and
effective
remediation
technologies
for
the
treatment
of
soil
contaminated
with
per-
polyfluoroalkyl
substances
(PFAS)
are
greatly
needed.
This
study
investigated
effects
waste-based
biochars
on
leaching
PFAS
from
a
sandy
low
total
organic
carbon
content
(TOC)
0.57
±
0.04
%
impacted
by
aqueous
film
forming
foam
(AFFF)
dispersed
at
former
fire-fighting
facility.
Six
different
(pyrolyzed
700–900
°C)
were
tested,
made
clean
wood
chips
(CWC),
waste
timber
(WT),
activated
(aWT),
two
digested
sewage
sludges
(DSS-1
DSS-2)
de-watered
raw
sludge
(DWSS).
Up-flow
column
percolation
tests
(15
days
16
pore
volume
replacements)
1
biochar
indicated
that
dominant
congener
in
soil,
perfluorooctane
sulphonic
acid
(PFOS)
was
retained
best
aWT
99.9
reduction
leachate
concentration,
followed
sludge-based
DWSS
(98.9
%)
DSS-2
DSS-1
(97.8
91.6
%,
respectively).
The
non-activated
wood-based
(CWC
WT)
other
hand,
reduced
<43
%.
Extrapolating
this
to
field
conditions,
90
PFOS
would
occur
after
15
y
unamended
1200
12,000
y,
respectively,
amended
DWSS-amended
biochar.
high
effectiveness
three
reducing
attributed
largely
porosity
size
range
(>1.5
nm)
can
accommodate
large
molecules
(>1.02–2.20
combined
affinity
matrix.
Other
factors
like
anionic
exchange
capacity
could
play
contributing
role.
Sorbent
better
long-chain
than
short-chain
PFAS,
due
weaker,
apolar
interactions
between
latter's
shorter
hydrophobic
CF2-tails.
findings
first
demonstrate
locally
sourced
wood-waste
be
suitable
sorbents
ex
situ
stabilization
PFAS-contaminated
bringing
technology
one
step
closer
full-scale
testing.
Chemical Engineering Journal,
Год журнала:
2024,
Номер
493, С. 152537 - 152537
Опубликована: Май 24, 2024
Biosolids
(stabilised
sewage
sludge)
are
the
final
solid
residues
of
wastewater
treatment
process
and
generally
applied
on
agricultural
land
in
many
countries,
including
Australia.
Per-
polyfluoroalkyl
substances
(PFAS)
a
group
synthetic
fluorinated
chemicals
with
ubiquitous
applications
consumer
products
persist
environment.
Globally,
PFAS
have
been
detected
biosolids
considered
source
discharge
to
The
thermal
is
gaining
increasing
interest
water
sector.
Therefore,
viability
techniques
for
safe
destruction
has
received
substantial
research
attention
last
few
years.
Recent
studies
suggest
that
can
be
removed
potentially
destroyed
during
combustive
(such
as
incineration)
non-combustive
treatment,
such
pyrolysis,
gasification,
hydrothermal
carbonisation/liquefaction.
However,
there
limited
understanding
fate
transformation
degradation
across
overall
from
feed
pre-treatment
gas
cleaning
(post-thermal
treatment)
stage.
This
review
consolidates
current
knowledge
transformation,
destruction,
before,
during,
after
biosolids,
covering
lab,
pilot
scale,
industrial
studies.
It
suggested
mechanisms
may
differ
established
pathways
pure
salts,
given
complex
organic
inorganic
matrix
typically
low
concentrations.
Among
all
techniques,
pyrolysis
extensive
investigations
at
different
scales
operation.
temperatures
residence
time
need
sufficiently
optimised
designing
realistic
large-scale
systems
relevant
biosolids'
compositional
peculiarities
destruction.
Frontiers in Environmental Science,
Год журнала:
2023,
Номер
11
Опубликована: Ноя. 20, 2023
Biochar
production
and
application
have
become
increasingly
popular
in
the
past
15
years.
Biochar,
derived
from
diverse
biomass
types,
offers
a
rich
carbon
source
created
through
thermal
combustion.
primarily
depends
on
pyrolysis
conditions
feedstock
type.
This
review
focuses
multifaceted
aspects
of
biochar,
encompassing
hydrothermal
carbonization,
gasification,
temperatures
biochar
its
role
bioeconomy
soil
remediation.
has
yielded
valuable
insights,
notably
decreasing
nutrient
leaching,
curbing
greenhouse
gas
(GHG)
emissions,
reducing
bioavailability
environmental
pollutants,
sequestering
(C)
soils,
enhancing
agricultural
productivity.
Consequently,
it
emerged
as
commodity
for
bioeconomy,
which
involves
harnessing
bioresources
bioengineering
to
create
economically
products.
As
marketable
output,
finds
energy,
biochar-based
product
manufacturing,
sector.
Thus,
not
only
enhances
quality
but
also
unlocks
additional
revenue
streams.
underscores
critical
selection
optimizing
production.
Furthermore,
highlights
sustainable
effective
tool
improving
various
types
remediating
contamination
caused
by
organic
impurities,
including
persistent
compounds
antibiotics.
Water Research,
Год журнала:
2023,
Номер
249, С. 120888 - 120888
Опубликована: Ноя. 16, 2023
Soil
washing
is
currently
attracting
attention
as
a
promising
remediation
strategy
for
land
contaminated
with
per-
and
polyfluoroalkyl
substances
(PFAS).
In
the
soil
process,
contaminant
transferred
from
into
liquid
phase,
producing
PFAS
process
water.
One
way
to
treat
such
water
use
coagulation
flocculation;
however,
few
studies
are
available
on
performance
of
flocculation
removing
This
study
evaluated
6
coagulants
flocculants
(polyaluminium
chloride
(PACl),
zirconium
oxychloride
octahydrate,
cationic
anionic
polyacrylamide,
Polyclay
685
Perfluor
Ad®),
treatment
proxy
water,
spiked
concentrations
found
at
typical
Aqueous
Film
Forming
Foam
(AFFF)
sites.
removal
efficiencies
(at
constant
pH)
varied
greatly
depending
flocculants,
well
dosage
used
targeted
PFAS.
All
tested
reduced
turbidity
by
>95%,
dosage.
Ad®,
specially
designed
coagulant,
showed
highest
efficiency
all
longer
chain
(>99%)
shorter
(>68%).
The
polyacrylamide
polymer
removed
up
an
average
80%,
whereas
was
lower
(<30%).
two
metal-based
tested,
PACl
zirconium,
61%
48%.
685,
mixture
powdered
activated
carbon
(PAC)
aluminium
sulphate,
90%
76%,
when
very
high
dosages
coagulant
were
(2,000
mg/L).
correlated
length
headgroup.
Shorter
dependent
electrostatic
interaction
precipitating
flocs,
PFAS,
hydrophobic
interactions
between
apolar
functional
groups
flocs
created
coagulant/flocculant,
dissolved
organic
matter
suspended
solids
played
major
role.
results
this
that
selecting
most
efficient
aqueous
conditions,
greater
amount
can
be
waters
in
facilities,
thus
included
part
various
trains.