Page 137 - AJWEP-v22i2

Radioactive levels in Ali Al-Sharqi and Kumait soils

outdoor, and total absorbed gamma dose rates (D , D , ELCR = ELCR + ELCR out (XIV)
out
in
tot
in
and D ) were computed using Equations VI-VIII. 35,36 Where DL is the duration of life (70 years), and RF
tot
nGy is the risk factor (The International Commission on
D ( h ) 092 A 1 . 1 A 0 .081 A Radiological Protection 60 uses values of 0.05 Sv for
.
in
Ra
Th
K
-1
(VI) the public).
nGy
D ( ) 0 .462 A 0 .604 A 2.4.7. AGDE
Th
Ra
out
h
0 .0417 A (VII) Radiation can have various effects on living organisms.
K
These effects may kill a cell, cause it to change, or
not affect the DNA. The United Nations Scientific
nGy Committee on the Effects of Atomic Radiation
D tot� D D out (VIII)
in
h (UNSCEAR) primarily focuses on the gonads, active
bone marrow, and the cells on the bone surface when
2.4.5. AEDE assessing radiation impacts. Equation XV was used to
To estimate the AEDE, one has to consider the calculate the AGDE resulting from the radiation emitted
conversion coefficient 0.7 Sv/Gy, which is used to by 226 Ra, 232 Th, and K 42,43 to determine the radiation
40
convert the absorbed rate in the air to human effective risk to these tissues.
dose equivalent with indoor and outdoor occupancy
of 80 and 20%, respectively. The indoor, outdoor, and AGDE Sv 309. A 4 18. A

total annual effective dose rates (AEDE , AEDE , y Ra Th
in
out
and AEDE ) were determined using Equations 0 314 A (XV)
tot
.
IX-XI, 37-39 K
mSv nGy Sv 3. Results and discussion
.(
.
AEDE ( y ) D ( h )07 Gy )08
in
in
h 6 3.1. Activity concentrations of radionuclides
8760 10 (IX) The results of activity concentrations of 226 Ra, 232 Th,
y
and K in the soils of Ali Al-Sharqi and Kumait cities
40
mSv nGy Sv are presented in Tables 1 and 2.
.
AEDE out ( y ) D ( h )07 Gy )02 The activity concentrations of 226 Ra, 232 Th, and
.(
out
h 6 40 K in Ali Al-Sharqi varied from 8.7 ± 1.6 (S )
2
8760 10 (X) to 33.9 ± 3.4 (S ) Bq/kg, 8.3 ± 2.9 (S ) to
14
15
y 17.5 ± 3 (S ) Bq/kg, and 158.9 ± 8 (S ) to 201.6 ± 8.3
1
1
(S ) Bq/kg with an average value of 15.1 ± 2.5 Bq/kg,
21
mSv 14.7 ± 2.4 Bq/kg, and 180.8 ± 7.9 Bq/kg, respectively
AEDE tot AEDE AEDE � (XI)
in
out
y (Table 1). In Kumait, the activity concentrations of
related radionuclides were varied from 4.6 ± 1.4 (S )
19
2.4.6. ELCR to 27.6 ± 2.6 (S ) Bq/kg, 7.2 ± 1.6 (S ) to
23
7
ELCR is used in radiation protection assessment to predict 29.5 ± 2.8 (S ) Bq/kg, and 138.4 ± 6.3 (S ) to 295.2 ± 9.4
23
17
the probability of individuals’ cancer development over (S ) Bq/kg with an average value of 13.6 ± 2.1 Bq/kg,
5
a lifetime due to low radiation exposure levels. Based 17.2 ± 2.4 Bq/kg, and 193.6 ± 8.6 Bq/kg, respectively,
226
232
40
on the calculated values of annual effective dose rates, for Ra, Th, and K (Table 2).
the indoor, outdoor, and total lifetime cancer risks It can be noted from Tables 1 and 2 that the mean
(ELCR , ELCR , and ELCR ) were calculated using activity concentrations of 226 Ra in Ali Al-Sharqi soil
out
in
tot
the Equations XII-XIV, 7,40,41 were higher than in Kumait. In comparison, the mean
232
40
mSv activity concentrations of Th and K in Kumait soil

ELCR AEDE ( ) DL RF (XII) were higher than in Ali Al-Sharqi.
in
in
y The findings indicate that average values of Ra,
226
40
232 Th, and K in Ali Al-Sharqi and Kumait soil
mSv
ELCR AEDE ( ) DL RF (XIII) samples are below the global average of 35, 30, and

out
out
y 400 Bq/kg, respectively. For this study, a coverage
44
Volume 22 Issue 2 (2025) 131 doi: 10.36922/AJWEP025060032