Summer and winter variations of BTEX concentrations in an oil refinery complex and health risk assessment based on Monte-Carlo simulations
Scientific Reports,
Год журнала:
2023,
Номер
13(1)
Опубликована: Июль 1, 2023
The
summer
and
winter
concentrations
of
BTEX
pollutants
were
investigated
in
various
workplaces
an
oil
Refinery,
Iran.
In
total
252
air
samples
from
the
breathing
zones
following
employees
collected:
supervisors,
safetymen,
repairmen,
site
men,
all
workers.
Carcinogenic
non-carcinogenic
risk
values
calculated
based
on
USEPA
methodology
using
Monte
Carlo
simulations.
higher
than
season
for
workstations,
especially
toluene
ethylbenzene.
mean
exposure
to
benzene
repairmen
men
threshold
limit
value
1.60
mg/m3
both
seasons.
Non-carcinogenic
(HQ)
benzene,
ethylbenzene,
xylene
as
well
exceeded
acceptable
level
1.
HQ
ethylbenzene
also
>
For
workstations
definite
carcinogenic
was
indicated
LCR
1
×
10-4
Язык: Английский
Vertical distribution of VOCs in the boundary layer of the Lhasa valley and its impact on ozone pollution
Dan Yao,
Yinghong Wang,
Zhixuan Bai
и другие.
Environmental Pollution,
Год журнала:
2023,
Номер
340, С. 122786 - 122786
Опубликована: Окт. 21, 2023
Язык: Английский
Migration and Transformation of Chemical Pollutants as Mixtures
Опубликована: Янв. 14, 2025
As
civilization
has
evolved,
industrial
and
human
daily
activities,
such
as
the
production
of
chemicals
agents
incineration
municipal
solid
waste,
have
contributed
significantly
to
environmental
pollution.
The
quality
subsurface
water
sources
is
at
risk,
soil
deteriorating,
structural
properties
are
changed,
atmosphere
polluted,
even
aquatic
terrestrial
creatures
harmed.
In
this
chapter,
focus
pollutants
on
volatile
organic
compounds
(VOCs),
some
persistent
(POPs).
VOCs
with
high
vapor
pressure
mainly
exist
in
prone
migration.
potent
ozone
(O
3
)
precursors
that
provide
OH
radicals
needed
ambient
air
for
generation
ground-level
O
,
making
them
photochemically
reactive
molecules
atmospheric
chemistry.
On
contrary,
POPs
a
type
pollutant
low
pressure,
although
they
can
still
rely
long-distance
addition,
difficult
environmentally
degrade
very
toxic,
which
be
enriched
food
web
bring
health
risks
beings.
Both
always
occur
form
mixture
environment.
Different
types
or
numbers
substituents
connected
same
molecular
skeleton
result
multiple
congeners.
Therefore,
paying
attention
overall
geochemical
behavior
mixed
more
conducive
understanding
characteristics
migration
transformation.
Язык: Английский
Review: Advances in efficient separation of paraxylene from mixed xylene isomers using SMB technology and MOF materials
Journal of Industrial and Engineering Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 1, 2025
Язык: Английский
Dynamic Mn–VO Associates Boosted Molecular Oxygen Activation for Benzene Combustion on Mn-Doped Mesocrystalline CeO2
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 23, 2025
Highly
efficient
molecular
oxygen
activation
over
transition
metal
oxides
toward
catalytic
abatement
of
aromatic
volatile
organic
compounds
(AVOCs)
is
possible
yet
challenging
due
to
the
easily
deactivated
surface
vacancy
(VO).
Herein,
dynamic
Mn–VO
associates
were
crafted
onto
Mn-incorporated
CeO2
mesocrystal
(Mn/meso-CeO2)
with
Mn
substituting
a
Ce
atom
through
an
easy-to-handle
precipitation
strategy.
Experiments
and
theoretical
calculation
demonstrated
that
asymmetric
Mn–O–Ce
configuration
induced
electron
delivery
from
low-valent
adjacent
Ce,
destabilizing
circumambient
O
atoms
facilitating
formation
associates.
Compared
pristine
meso-CeO2,
Mn/meso-CeO2
could
efficiently
activate
O2
into
superoxide
radical
peroxanion
(O2•–
O22–)
at
higher
reaction
temperature
(over
200
°C).
Meanwhile,
featuring
substantially
elevated
Lewis
acidity
promoted
adsorption
benzene.
Consequently,
catalyst
exhibited
superior
oxidation
reactivity
(T90
=
215
°C)
C6H6
combustion
via
Langmuir–Hinshelwood
mechanism.
This
work
underlines
importance
rational
design
regulation
sites
oxide
surfaces
for
robust
durable
refractory
AVOC
combustion.
Язык: Английский
Health Risk Assessment of Exposure to BTEX and PAH Compounds in Workers of Burnt Oil Recycling Factory: Simulation Using Monte Carlo Method
Safiye Ghobakhloo,
Amir Hossein Khoshakhlagh,
Nisreen Alwan
и другие.
Environmental Processes,
Год журнала:
2024,
Номер
11(3)
Опубликована: Июль 8, 2024
Язык: Английский
Assessing Benzene and TVOC Pollution and the Carcinogenic and Noncarcinogenic Risks to Workers in an Industrial Plant in Southeastern Romania
Toxics,
Год журнала:
2024,
Номер
12(3), С. 187 - 187
Опубликована: Фев. 28, 2024
The
article
aims
to
analyze
the
pollution
with
Volatile
Organic
Compounds
(VOC)
emitted
from
biggest
refinery
in
Romania,
using
daily
and
monthly
series
registered
for
two
years
sites
on
industrial
platform,
carcinogenic
noncarcinogenic
risks
workers
at
plant.
Since
values
of
basic
statistics
(minimum,
maximum,
average)
outliers
indicate
that
most
recorded
exceed
maximum
admissible
limits
established
by
law,
Peaks
Over
Threshold
(POT)
method
was
utilized
model
determine
return
levels
benzene
total
VOC
(TVOC).
Given
high
obtained
relatively
short
periods,
indicating
potential
danger
workers,
we
assessed
TVOC
exposure
computing
hazard
index
(HI)
lifetime
cancer
risk
(LCR).
results
43.75%
HI
are
above
1,
a
different
categories
workers.
LRC
indicates
93.75%
all
considered
exposed
TVOC.
Язык: Английский