Distribution and source apportionment of polycyclic aromatic hydrocarbons in indoor dust of an emerging residential city in Nigeria: implication on human health
Environmental Pollution and Management,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Formation of Polycyclic Aromatic Hydrocarbons (PAHs) in Thermal Systems: A Comprehensive Mechanistic Review
Energy & Fuels,
Год журнала:
2024,
Номер
38(22), С. 21735 - 21792
Опубликована: Ноя. 1, 2024
Polycyclic
aromatic
hydrocarbons
(PAHs)
are
formed
invariably
through
oxidative
and
pyrolytic
degradation
of
organic
materials
fuels.
Understanding
the
highly
complex
reaction
mechanisms
that
dictate
their
synthesis
in
thermal
systems
has
been
given
a
great
deal
focus.
Such
interest
stems
from
two
broad
perspectives,
namely,
enhancing
efficiency
combustion
system,
energy
recovery
fuels
protecting
environment.
Health
environmental
effects
widely
vary
among
PAHs
where
certain
compounds
exhibit
carcinogenic
tendencies.
This
critical
review
mainly
aims
to
provide
general
mechanistic
view
commonly
discussed
formation
pathways
PAHs.
The
attained
knowledge
often
incorporates
experimental
measurements
kinetic
modelings,
as
well
mapped
out
by
quantum
chemical
calculations.
A
sampling
species
is
typically
conducted
via
molecular
beam
(MB)–mass
spectroscopy
(MS)
technique
connected
reactor
(flow
reactor,
jet-stirred
or
shock
tube).
Generally,
PAH
precursors
encompass
four
categories
(radicals
molecules):
acetylenic
compounds,
alkyl
radicals,
phenyl
resonance-stabilized
cyclic
radicals.
Overall,
relevance
mechanism
depends
on
consistency
between
proposed
model
pathways,
profiles
products
at
investigated
conditions
(i.e.,
temperatures,
pressures,
distance
burners).
effect
seeding
common
precursors,
with
other
explored
surveying
pertinent
studies.
Growth
higher
PAHs,
including
toxic
pyrene,
most
likely
involves
hydrogen
abstraction
acetylene
addition
(HACA)-like
starting
anthracene
bimolecular
reactions
involve
benzyl
radicals
indene
molecules.
synergistic
collaboration
different
suggested
account
for
observed
fast
growth
rate
As
experimentally
shown,
sequential
mass
15
u,
24
26
74
indicate
routes
MAC,
HACA,
HAVA*,
PAC
routes,
respectively.
Whether
physical
process
initial
step
conversion
into
soot
(the
inception
step)
still
debated
literature.
Recent
evidence
underscores
commence
creating
dimers
clustering
under
real
flame
400–1200
K).
Formation
synthetic
natural
polymers
ensues
condensation
fragments
structural
arrangements
polymeric
entities,
prior
fragmentation.
surveyed
presented
this
will
be
useful
readers
who
aim
comprehend
chemistry
underlying
systems.
Язык: Английский
House dust - unwanted problem for the occupant of the facility, but a promising source of scientific information about the quality of indoor environment
Michalina Pielaszewska,
Karolina Budnarowska,
Mariusz Marć
и другие.
Building and Environment,
Год журнала:
2025,
Номер
unknown, С. 112987 - 112987
Опубликована: Апрель 1, 2025
Язык: Английский
Polycyclic Aromatic Hydrocarbons (PAHs) in Household Dusts: Distribution, Sources, and Health Risk Assessment from Rural Areas in Chiang Mai Province, Thailand
Buildings,
Год журнала:
2025,
Номер
15(11), С. 1855 - 1855
Опубликована: Май 28, 2025
The
present
study
investigated
the
concentrations,
sources,
and
potential
health
risk
assessment
of
polycyclic
aromatic
hydrocarbons
(PAHs)
in
house
dust
from
residences
Samoeng
District,
Chiang
Mai
Province,
Thailand.
Samples
48
households
were
analyzed
for
16
PAHs.
total
concentrations
PAHs
(ΣPAHs)
ranged
between
270.1
to
45,386.8
ng
g−1,
with
a
mean
3942.4
±
8175.1
g−1.
Pyrene
(Pyr),
benzo(k)fluoranthene
(BkF),
indeno(1,2,3-cd)pyrene
(IcdP)
predominant
compounds.
Diagnostic
ratios
principal
component
analysis
(PCA)
showed
wood
burning
biomass
as
sources.
Evaluations
incremental
lifetime
cancer
(ILCR)
higher
risks,
especially
children
(average
ILCR
=
6.57
×
10−3),
dermal
contact
main
exposed
pathway.
Risks
exceeded
acceptable
criteria
(10−6
10−4),
suggesting
serious
public
problems.
results
highlight
significance
pollution
mitigation
measures,
such
reducing
use
combustion
improving
indoor
air
quality,
protecting
vulnerable
populations
rural
regions.
research
conducted
presents
important
insights
into
environmental
impacts
shows
importance
procedures
that
can
reduce
exposure.
Язык: Английский
Assessing the role of Persistent Organic Pollutants (POPs) in cancer development in Nigeria: environmental exposure, risk factors, and policy gaps
Deleted Journal,
Год журнала:
2025,
Номер
2(1)
Опубликована: Июнь 2, 2025
Язык: Английский
Risk assessment of PAHs in dusts from surfaces of abandoned automobiles at auto-workshops of three semi-urban areas of Eastern Nigeria: Compositional patterns and source apportionments
Environmental Pollution and Management,
Год журнала:
2024,
Номер
1, С. 24 - 31
Опубликована: Июнь 6, 2024
The
concentrations,
sources,
compositional
patterns,
and
risk
assessments
of
PAHs
in
dust
on
abandoned
automobiles
at
auto-workshops
three
semi
urban
areas
were
studied.
Dust
samples
randomly
collected
from
least
five
car
surfaces
automobile
workshops
located
Rumuodomaya-Ogale,
Ekwulobia,
Awka
between
December
2019
March
2020,
analysed
for
using
the
Buck
M910
Gas
Chromatography-Flame
Ionization
Detector.
Car
surface
Rumuodomaya-Ogale
showed
highest
PAH
concentration
2.348
µg/g
while
that
had
lowest
total
0.129
February
2020.
Ekwulobia
consisted
mostly
3-ring
throughout
month,
except
January
high
BaPTEQ
values,
indicating
a
potential
carcinogenic
workers.
Considerable
cancer
may
arise
prolonged
exposure
adult's
workers
to
via
dermal
contact
inhalation.
ingestion
values
children
higher
than
adult
counterparts
(except
Awka,
2019).
principal
component
analysis
suggested
influence
exhaust
emissions
source
dusts
workshops.
There
is
need
have
wear
personal
protection
equipment
(PPE)
duty
reduce
associated
with
particles.
Язык: Английский