Geographical impact on the distribution of polycyclic aromatic hydrocarbons (PAHs) in hilly terrain topsoil: a case study at Chongqing, SW, China
Jianghai Liao,
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Xinyu Wang,
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Hangjia Wang
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et al.
Journal of Hazardous Materials,
Journal Year:
2025,
Volume and Issue:
487, P. 137085 - 137085
Published: Jan. 7, 2025
Language: Английский
Formation of Polycyclic Aromatic Hydrocarbons (PAHs) in Thermal Systems: A Comprehensive Mechanistic Review
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(22), P. 21735 - 21792
Published: Nov. 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.
Language: Английский
Evolution of three pairs of PAH with different molecular weights and aging products OPAH: Insights from OPAH/PAH high-time resolution hazes
Atmospheric Environment,
Journal Year:
2025,
Volume and Issue:
unknown, P. 121294 - 121294
Published: May 1, 2025
Language: Английский
Modification of Soil Hydroscopic and Chemical Properties Caused by Four Recent California, USA Megafires
Fire,
Journal Year:
2023,
Volume and Issue:
6(5), P. 186 - 186
Published: May 3, 2023
While
it
is
well
known
that
wildfires
can
greatly
contribute
to
soil
water
repellency
by
changing
chemical
composition,
the
mechanisms
of
these
changes
are
still
poorly
understood.
In
past
decade,
number,
size,
and
intensity
have
increased
in
western
USA.
Recent
megafires
California
(i.e.,
Dixie,
Beckwourth
Complex,
Caldor,
Mosquito
fires)
provided
us
with
an
opportunity
characterize
pre-
post-fire
soils
study
effects
fires
on
repellency,
organic
constituents,
connections
between
two.
Water
drop
penetration
time
(WDPT)
tests
performed
field
showed
a
significant
increase
(from
<1
s
up
>600
s)
WDPT
from
soils.
This
after
was
confirmed
increases
apparent
contact
angle
(ACA)
1.1
9
times
unburned
burned
The
characterization
high
resolution
mass
spectrometry
abundance
hydrophobic
organics
(e.g.,
PAH-like
compounds
molecules
low
number
oxygen
atoms)
as
correlation
average
H/C
ratio
aromaticity
index
(AI)
ACA.
Most
likely,
triggers
hydrological
such
landslides,
flooding,
debris
flows.
Language: Английский
Wildfire smoke and health impacts: a narrative review
Jornal de Pediatria,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 1, 2024
Language: Английский
Gaseous and aerosol emissions from open burning of tree pruning and hedge trimming residues: detailed composition and toxicity
Atmospheric Environment,
Journal Year:
2024,
Volume and Issue:
unknown, P. 120849 - 120849
Published: Oct. 1, 2024
Language: Английский
Insights into the formation of secondary organic aerosols from agricultural residue burning emissions: A review of chamber-based studies
The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
952, P. 175932 - 175932
Published: Aug. 31, 2024
Language: Английский
Distribution and transfer rules of polycyclic aromatic hydrocarbons in soil-wheat ecosystems in China
Guanyu Qin,
No information about this author
Chao Su,
No information about this author
Xuedong Qiao
No information about this author
et al.
Environmental Monitoring and Assessment,
Journal Year:
2023,
Volume and Issue:
195(12)
Published: Nov. 10, 2023
Language: Английский
Characterization of indoor airborne particulate matter and bioaerosols in wood-fired pizzeria kitchens
Discover Environment,
Journal Year:
2024,
Volume and Issue:
2(1)
Published: Sept. 18, 2024
Language: Английский
The use of lichens and mosses as sentinel organisms for the determination of the airborne organic pollution in Western Pyrenees: the case of the Irati Forest
Atmospheric Pollution Research,
Journal Year:
2024,
Volume and Issue:
16(2), P. 102376 - 102376
Published: Dec. 5, 2024
Language: Английский