Background:
Coronavirus
disease
has
affected
the
entire
population
worldwide
in
terms
of
physical
and
environmental
consequences.Therefore,
current
study
demonstrates
changes
concentration
gaseous
pollutants
their
health
effects
during
COVID-19
pandemic
Delhi,
National
Capital
city
India.Methodology:
In
present
study,
secondary
data
on
such
as
nitrogen
dioxide
(NO
2
),
carbon
monoxide
(CO),
sulfur
(SO
ammonia
(NH
3
ozone
(O
)
were
collected
from
Central
Pollution
Control
Board
(CPCB)
a
daily
basis.Data
January
1,
2020,
to
September
30,
determine
relative
(%)
for
pre-lockdown,
lockdown,
unlockdown
stages
COVID-19.Results:
The
findings
reveal
that
declined
range
51%
-83%
(NO),
40%
-69%
(NOx),
31%
-60%
25%
-40%
lockdown
compared
pre-lockdown
period,
respectively.The
drastic
decrease
was
observed
due
restricted
measures
periods.The
level
be
higher
periods
prelockdown
period.These
are
linked
between
risk
assessment
hazard
identification
non-carcinogenic.However,
infants
(0-1yr),
Health
Quotient
(HQ)
annual
groups
found
than
rest
exposed
group
(toddlers,
children,
adults)
all
periods.Conclusion
air
quality
values
calculated
"poor
category
"very
poor"
zones
whereas,
levels
"satisfactory,"
except
Northeast
which
displayed
"moderate"
Toxics,
Journal Year:
2023,
Volume and Issue:
11(2), P. 165 - 165
Published: Feb. 9, 2023
During
the
COVID-19
pandemic,
governments
in
many
countries
worldwide,
including
India,
imposed
several
restriction
measures,
lockdowns,
to
prevent
spread
of
infection.
lockdowns
led
a
reduction
gaseous
and
particulate
pollutants
ambient
air.
In
present
study,
we
investigated
substantial
changes
selected
volatile
organic
compounds
(VOCs)
after
outbreak
coronavirus
pandemic
associations
with
health
risk
assessments
industrial
areas.
VOC
data
from
1
January
2019
31
December
2021
were
collected
Central
Pollution
Control
Board
(CPCB)
website,
identify
percentage
levels
before,
during,
COVID-19.
The
mean
TVOC
at
all
monitoring
stations
47.22
±
30.15,
37.19
37.19,
32.81
µg/m3
for
2019,
2020,
2021,
respectively.
As
result,
gradually
declined
consecutive
years
due
India.
9
61%
during
period
as
compared
pre-pandemic
period.
current
T/B
ratio
values
ranged
2.16
(PG)
26.38
(NL),
which
indicated
that
major
pollutant
contributors
traffic
non-traffic
sources
findings
had
positive
but
low
correlations
SR,
BP,
RF,
WD,
correlation
coefficients
(r)
0.034,
0.118,
0.012,
0.007,
respectively,
whereas
negative
observed
AT
WS,
−0.168
−0.150,
lifetime
cancer
(LCR)
value
benzene
was
reported
be
higher
children,
followed
by
females
males,
pre-pandemic,
post-pandemic
periods.
A
nationwide
scale-up
this
study’s
might
useful
formulating
future
air
pollution
policies
associated
factors.
Furthermore,
study
provides
baseline
studies
on
impacts
anthropogenic
activities
quality
region.
Frontiers in Public Health,
Journal Year:
2023,
Volume and Issue:
10
Published: Jan. 10, 2023
The
concentrations
of
particulate
and
gaseous
Polycyclic
Hydrocarbons
Carbon
(PAHs)
were
determined
in
the
urban
atmosphere
Delhi
different
seasons
(winter,
summer,
monsoon).The
samples
collected
using
instrument
air
metric
(particulate
phase)
charcoal
tube
(gaseous
analyzed
through
Gas
chromatography.
principal
component
correlation
used
to
identify
sources
PAHs
during
seasons.The
mean
concentration
sum
total
(TPAHs)
for
phases
at
all
sites
found
be
higher
winter
season
(165.14
±
50.44
ng/m3
65.73
16.84
ng/m3)
than
summer
(134.08
35.0
43.43
9.59
ng/m3),
whereas
monsoon
was
least
(68.15
18.25
37.63
1
13.62
ng/m3).
analysis
(PCA)
results
revealed
that
seasonal
variations
accounted
over
86.9%,
84.5%,
94.5%
monsoon,
seasons,
respectively.
strong
positive
coefficients
observed
between
B(ghi)P
DahA
(0.922),
B(a)P
IcdP
(0.857),
(0.821),
which
indicated
common
source
emissions
PAHs.
In
addition
this,
Nap
Flu,
Flu
Flt,
B(a)P,
showed
moderate
high
ranging
from
0.68
0.75
phase
carcinogenic
health
risk
values
calculated
4.53
×
10-6,
2.36
10-5
children,
1.22
10-5,
6.35
adults,
current
relatively
prescribed
standard
Central
Pollution
Control
Board,
India
(1.0
10-6).
Urban Water Journal,
Journal Year:
2024,
Volume and Issue:
21(3), P. 380 - 392
Published: Jan. 12, 2024
In
late
December
2019,
a
novel
coronavirus,
COVID
−19
originated
in
Wuhan
city
of
China,
and
significant
improvement
not
only
the
air
quality
but
also
water
quality.
Therefore,
current
study
demonstrates
changes
parameters
Ghaggar
river,
Punjab,
India.
The
variations
river
have
been
examined
during
pre-,
during,
post-pandemic
periods.
maximum
temperature
for
all
monitoring
stations
was
between
28
to
37°C
pandemic
period,
whereas
dissolved
oxygen
value
varied
from
3
7
mg/L.
pH
obtained
reported
be
7.7
8.0,
except
chhatbir
station
(7.6).
biochemical
demand
found
18–53
Strong
positive
correlations
were
observed
total
coliform
fecal
pre
(0.76)
(0.89)
Similar
recorded
BOD
conductivity
(0.75)
(0.58)
PeerJ,
Journal Year:
2023,
Volume and Issue:
11, P. e14489 - e14489
Published: Jan. 9, 2023
Coronavirus
disease
has
affected
the
entire
population
worldwide
in
terms
of
physical
and
environmental
consequences.
Therefore,
current
study
demonstrates
changes
concentration
gaseous
pollutants
their
health
effects
during
COVID-19
pandemic
Delhi,
national
capital
city
India.
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2023,
Volume and Issue:
8, P. 100417 - 100417
Published: July 7, 2023
In
December
2019,
a
novel
coronavirus
disease
(COVID-19)
outbreak
occurred
due
to
human
respiratory
virus
that
originated
in
the
city
of
Wuhan,
China.
During
COVID-19
lockdown,
there
was
significant
improvement
air
quality
across
world.
We
analyzed
data
for
BTEX
over
three
years
(January
2019
2021)
with
pairwise
comparison
and
trend
analysis
pre-,
during,
post-pandemic
periods.
This
study
demonstrates
substantial
changes
concentration
VOCs
urban
area
(Punjab)
lockdown
effects.
The
results
indicate
reduction
mean
TVOCs
all
monitoring
stations
found
be
8.89
±
1.80,
5.59
1.71,
5.57
1.43
μg/m3
before,
post-pandemic,
respectively.
level
declined
by
−43%
during
period
compared
previous
years.
A
higher
T/B
ratio
Patiala
(2.97
μg/m3)
before
pandemic,
which
may
vehicle
emission
sources.
LCR
values
benzene
were
children
than
males
females,
indicated
possible
risk.
exceeded
prescribed
value
CPCB
children.
