Journal of Environmental Quality,
Journal Year:
2022,
Volume and Issue:
52(3), P. 584 - 595
Published: Dec. 17, 2022
Phosphorus
(P)
is
an
essential
element
to
produce
feed
and
fertilizers
but
also
a
nonrenewable
resource.
Both
the
predicted
exhaustion
of
phosphatic
rocks
risk
eutrophication
lead
increasing
necessity
for
P
recovery
methodologies
be
applied
in
municipal
wastewater
treatment
plants
(WWTPs).
One
most
promising
solutions
involves
precipitation
P-based
minerals
reusable
as
slow-release
fertilizers.
In
this
study,
struvite
hydroxyapatite
from
WWTP
digestate
liquid
fraction
(centrate)
was
investigated
at
varying
pH
(8-10),
reagent
typologies
(MgCl2
,
NaOH,
Ca(OH)2
CaCl2
),
concentrations
under
limiting
magnesium
doses
through
liquid-
solid-phase
analyses
thermodynamical
modeling.
A
maximum
87.3%
achieved
9
by
adding
NaOH
MgCl2
dose
656
mg/L
(the
higher
tested).
According
these
data,
it
estimated
that
92.0
tons/year
33.2
could
recovered
centrate
with
cost
consumption
being
almost
50%
mean
market
value.
An
increase
observed
while
comparing
experiments
same
values
Mg2+
dose.
Ca2+
addition
led
extensive
mainly
amorphous
phases
interfere
formation.
Critical Reviews in Environmental Science and Technology,
Journal Year:
2022,
Volume and Issue:
53(11), P. 1148 - 1172
Published: Sept. 30, 2022
Phosphorus
(P)
as
an
essential
nutrient
for
life
sustains
the
productivity
of
food
systems;
yet
misdirected
P
often
accumulates
in
wastewater
and
triggers
water
eutrophication
if
not
properly
treated.
Although
technologies
have
been
developed
to
remove
P,
little
attention
has
paid
recovery
from
wastewater.
This
work
provides
a
comprehensive
review
state-of-the-art
removal
science
treatment.
Our
analyses
focus
on
mechanisms,
efficiencies,
potential
four
typical
treatment
processes
including
precipitation,
biological
treatment,
membrane
separation,
adsorption.
The
design
principles,
feasibility,
operation
parameters,
pros
&
cons
these
are
analyzed
compared.
Perspectives
future
research
also
proposed
context
paradigm
shift
sustainable
technology.
Current Opinion in Environmental Science & Health,
Journal Year:
2022,
Volume and Issue:
30, P. 100392 - 100392
Published: Sept. 27, 2022
Cadmium
(Cd)
is
a
heavy
metal
that
accumulates
in
soil
and
living
organisms
causes
severe
permanent
damage.
Its
presence
the
depends
largely
on
use
of
phosphate
fertilizers.
Phosphorite
apatite
rocks
used
fertilizers
production
contain
several
other
minerals,
including
Cd.
The
amount
Cd
incorporated
type
phosphorite
(with
low
or
high
content).
present
mainly
insoluble
form
has
no
bioavailability
for
plants.
However,
plants
can
increase
solubility
by
releasing
root
exudates
change
pH
rhizosphere,
therefore
increasing
accumulation.
Once
crops
absorb
Cd,
it
enters
food
chain.
Food
primary
source
exposure
(for
non-smoking
population),
with
cereals,
nuts
legumes,
fish
shellfish
being
major
contributors.
Progressive
accumulation
humans
impairs
kidney
function,
affects
liver,
bone
demineralization.
classification
as
human
carcinogen
goes
back
to
1990s.
European
Union
adopted
Regulation
(EU)
2019/1009,
limiting
content
organo-mineral
fertilizer
having
total
phosphorus
(P)
5%
P2O5
equivalent
at
60
mg
kg−1
P2O5.
This
threshold
seems
inadequate
compared
values
currently
place
some
EU
countries:
12
member
states
have
between
20
50
P2O5,
8
same
proposed
regulation,
2
higher
threshold.
Meanwhile,
new
CAP
Strategic
Plans
explicitly
references
health
fertility
protection
limitation
contaminants
Fertilizers
content,
thresholds
than
would
effectively
limit
bioaccumulation.
As
stopping
P
application
cannot
be
an
option,
strategies
such
cultivars
accumulate
less
their
consumed
parts,
mineral
nutrient
efficiency
those
actually
produced,
decadmiation
from
raw
materials,
phytoremediation
before
cultivation,
increased
recovered
nutrients,
should
adopted.
Chemical Engineering Journal,
Journal Year:
2023,
Volume and Issue:
461, P. 142076 - 142076
Published: Feb. 22, 2023
Constructed
wetlands
are
commonly
used
to
treat
domestic
wastewater,
but
the
extent
which
microplastics
retained
in
constructed
and
impact
this
has
on
their
efficiency
not
known.
In
context,
we
investigated
retention
of
(microbeads
fibres)
effects
removal
carbonaceous
(expressed
as
chemical
oxygen
demand
(COD),
biochemical
(BOD5),
dissolved
organic
carbon
(DOC)),
nitrogenous
(N-NH4+,
N-NO3-,
N-NO2-),
phosphorous
(P-PO43-)
matters
a
horizontal
sub-surface
flow
laboratory
wetland
(LCW)
under
continuous
flow.
The
LCW
was
operation
for
257
days,
with
first
78
days
without
added
weekly
during
next
179
days.
presence
had
no
significant
effect
COD,
BOD5,
DOC,
N-NH4+,
N-NO3-
removal,
while
statistically
decrease
N-NO2-
an
increase
P-PO43-
concentrations
effluent
were
observed
after
addition
microplastics.
Microplastics
efficiently
LCW,
only
0.296%
0.003%
total
microbeads
fibres,
respectively,
detected
effluent.
Thus,
it
is
evident
that
effective
barrier
release
into
aquatic
environment,
high
thus
accumulation
may
alter
nutrient
cycling
wetlands.
