Environmental Monitoring and Assessment,
Journal Year:
2024,
Volume and Issue:
196(5)
Published: April 25, 2024
Abstract
The
potentially
harmful
effects
of
consuming
toxic
elements
(PTEs)
and
microplastics
(MPs)
regularly
via
drinking
water
are
a
significant
cause
for
worry.
This
study
investigated
PTEs
(Cd,
Cu,
Cr,
Ni,
Pd,
Zn,
Co),
MPs,
turbidity,
pH,
conductivity,
health
risk
assessment
in
the
treatment
plant
Kielce,
Poland.
Zn
had
highest
concentrations
throughout
facility,
whereas
Cd,
Pb,
Co
lower
(<
0.1
µg/L).
order
among
specified
was
like
Zn˃Cu˃Ni˃Cr˃Cd˃Pb
Co.
minimum
turbidity
0.34,
maximum
1.9
NTU.
range
pH
samples
6.51—7.47.
conductivity
1,203—1,445
ms
samples.
These
identified
MPs
were
categorized
into
fiber
fragments.
color
these
blue,
red,
black,
green,
transparent.
size
196
4,018
µm,
while
average
2,751
±
1,905
µm.
concentration
per
liter
108.88
55.61.
listed
C,
O,
Na,
Mg,
Al,
Si,
K,
Ca,
Ti.
Fe
predominant
seen
using
EDX.
HQ
values
less
than
one
adults
children.
human
associated
with
all
detected
revealed
that
exhibit
satisfactory
degree
non-carcinogenic
adverse
risk.
HI
children
age
groups
one.
In
most
samples,
carcinogenic
value
exceeds
threshold
10
−6
.
MP
should
be
periodically
monitored
to
minimize
consumers'
environmental
pollution
risks.
Indoor and Built Environment,
Journal Year:
2024,
Volume and Issue:
33(8), P. 1519 - 1541
Published: April 17, 2024
Microplastics
(MPs),
measuring
less
than
5
mm,
have
been
causing
environmental
concerns
in
aquatic
ecosystems,
and
work
has
done
indoor
environments,
where
humans
spend
most
of
their
lives.
This
finding
revealed
a
diverse
range
MPs
within
house
dust
samples.
These
encompassed
fibres,
fragments,
foams,
pellets
films.
Due
to
the
ubiquity
textile-based
items,
fibres
are
common
MP.
The
different
colours
like
black,
red,
blue,
yellow,
white
brown.
study
there
were
substantial
differences
MP
sizes
across
households.
average
size
was
178.87–3713.99
µm.
One
hundred
eighteen
particles
identified
as
MPs.
22
types
MPs,
shedding
light
on
these
materials’
extensive
sources
applications
everyday
household
items.
environments
raise
about
potential
human
exposure
underscore
need
for
further
research
into
health
implications.
found
samples
low-density
polyethylene,
polypropylene,
polyamide,
polyvinyl
chloride,
high-density
polyethylene
polystyrene.
Carbon,
nitrogen,
fluorine,
sodium,
sulphur,
potassium,
calcium,
zinc,
oxygen
magnesium
elements
all
Compared
with
active
sampling,
slightly
more
Arabian Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
17(4), P. 105719 - 105719
Published: March 7, 2024
Hydrolysis/alcoholysis/ammonolysis
are
considered
as
viable
routes
for
efficient
degradation
and
recycling
of
polyethylene
terephthalate
waste
plastic.
The
possible
hydrolysis/alcoholysis/ammonolysis
pathways
the
ethylene
dimer
were
investigated
by
density
functional
theory
(DFT)
method
M06/cc-pVDZ.
geometric
structure
optimization
frequency
calculation
various
intermediates,
transition
states
products
involved
in
reaction
carried
out
to
obtain
thermodynamic
kinetic
parameter
values.
results
show
that
energy
barrier
cracking
process
can
be
reduced
under
conditions
hydrolysis/alcoholysis/ammonolysis,
which
makes
easier.
Additionally,
at
298
K
1
atm,
total
rate
constants
1.51
×
10-43
cm3
molecular-1s−1,
1.86
10-41
2.82
10-40
respectively.
hydrolysis
mainly
terephthalic
acid
glycol;
alcoholysis
dimethyl
ammonolysis
include
terephthalamide
glycol.
Furthermore,
this
study
shows
Gibbs
free
change
is
negatively
correlated
with
temperature
an
increase
enhance
spontaneity
reaction.
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2023,
Volume and Issue:
8, P. 100542 - 100542
Published: Nov. 8, 2023
One
of
the
difficult
and
well-known
pollutants
that
has
a
negative
impact
on
human
health
is
Microplastics
(MPs).
This
study's
primary
goal
to
present
state
our
understanding
evidence,
quantification,
origin,
effects
MPs
in
Godavari
River.
According
quantitative
analysis
investigation
(digestion,
separation,
filtration,
characterization),
mean
MP
concentration
river
was
found
be
3.9
items/L
(3900
Items/m3).
were
at
all
six
sites,
with
concentrations
ranging
from
6.5
2.2
(6500–2200
items/m3).
The
most
prevalent
shape
fiber
(81.5
%),
followed
by
foam
(13.2%),
fragments
(4.4%),
film
(0.7%).
colors
observed
blue
(26%),
Transparent
(25%),
pink
(17%),
yellow
(9%),
black
(8%),
white
(6%),
green
(3%),
red
(2%),
violet
From
chemical
characterization
ATR-FTIR,
polymers
detected
polypropylene
(PP),
high-density
polyethylene
(HDPE),
low-density
(LDPE),
(acrylonitrile
butadiene
styrene)
ABS,
EVA,
(polystyrene)
PS,
nylon.
Urban
areas
have
higher
than
less
populated
areas.
Through
direct
or
indirect
consumption,
River
may
risk
agriculture,
living
beings.
current
study
adds
pollution
provides
baseline
data
can
used
assess
precise
mitigation.
