Air radioactivity Monitoring by Higher Plants
Апстракт
Plants represent an important link in
transport and distribution of radionu
clides, heavy metals, and other pollu
tants in the environment and are often
used as biomonitors of atmospheric pol
lution. In this paper, two deciduous tree
genera, linden (Tilia tomentosa L. and
Tilia cordata Mill.) and chestnut {Aesculus
hippocastanum L), were analysed as
biomonitors of radionuclides in air. The
study was conducted in an urban area
(the city of Belgrade, Serbia), from 2002
to 2009. The activities of radionuclides
in soils, tree leaves and aerosols were
determined on an HPGe detector (Can
berra, relative efficiency 18 %) by stan
dard gamma spectrometry.
The mean activities of 137Cs, 40K,and
210Pb in soils were 34 Bq/kg d.w., 384
Bq/kg dw (dry weight), and 51 Bq/kg
dw, respectively, while their mean acti
vities in linden and chestnut leaves
were 1.8 Bq/kg dw, 498 Bq/kg dw, and
46 Bq/kg dw, respectively. The mean ^Be
activity in leaves was 125 Bq/kg dw. The
activities i...n aerosols were of order 10-6
Bq/m3 for 137Cs, 10-4 Bq/m3 for 210Pb, and
10-3 Bq/m3 for 7Be.
The calculated ”soil-to-leaves" transfer
factors for 40K and 210Pb were 1.3 and
0.9, respectively. The transfer factor for i
137Cs was close to zero suggesting at-
mospheric deposition as the primary
mode of 137Cs accumulation in leaves.
The 40K activity in leaves decreased towards the end of the growing season,
reaching around 70 % of the spring
maximum. The concentrations of 210Pb I
and 7Be measured in leaves were both
higher in autumn than in spring. However, the 210Pb activities increased throughout the growing season, while the
7Be activities reached the maximum in il
summer.
There were no significant differences in 5
the radionuclides' activities between J
the different sampling sites and between
the tree genera. A strong positive S
correlation for 210Pb activities in linden
leaves and in air during preceding
months was obtained, suggesting that
mature linden leaves could be used as |
biomonitors of recent exposure to 210Pb. i,
The seasonal pattern of the 7Be activity
in leaves partly followed the seasonal
pattern in aerosols, but no large positive a
correlation was found.
Кључне речи:
tree leaves / biomonitors / radionuclides / urban airИзвор:
Book of Abstracts of the 6th International Symposium on In Situ Nuclear Metrology as a Tool for Radioecology, June 11–15, Brussels, Belgium, 2012, 56-Издавач:
- Institute for Radioelements
Колекције
Институција/група
Fakultet veterinarske medicineTY - CONF AU - Ajtić, Jelena AU - Todorović, Dragana AU - Popović, Dragana AU - Nikolić, Jelena PY - 2012 UR - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2412 AB - Plants represent an important link in transport and distribution of radionu clides, heavy metals, and other pollu tants in the environment and are often used as biomonitors of atmospheric pol lution. In this paper, two deciduous tree genera, linden (Tilia tomentosa L. and Tilia cordata Mill.) and chestnut {Aesculus hippocastanum L), were analysed as biomonitors of radionuclides in air. The study was conducted in an urban area (the city of Belgrade, Serbia), from 2002 to 2009. The activities of radionuclides in soils, tree leaves and aerosols were determined on an HPGe detector (Can berra, relative efficiency 18 %) by stan dard gamma spectrometry. The mean activities of 137Cs, 40K,and 210Pb in soils were 34 Bq/kg d.w., 384 Bq/kg dw (dry weight), and 51 Bq/kg dw, respectively, while their mean acti vities in linden and chestnut leaves were 1.8 Bq/kg dw, 498 Bq/kg dw, and 46 Bq/kg dw, respectively. The mean ^Be activity in leaves was 125 Bq/kg dw. The activities in aerosols were of order 10-6 Bq/m3 for 137Cs, 10-4 Bq/m3 for 210Pb, and 10-3 Bq/m3 for 7Be. The calculated ”soil-to-leaves" transfer factors for 40K and 210Pb were 1.3 and 0.9, respectively. The transfer factor for i 137Cs was close to zero suggesting at- mospheric deposition as the primary mode of 137Cs accumulation in leaves. The 40K activity in leaves decreased towards the end of the growing season, reaching around 70 % of the spring maximum. The concentrations of 210Pb I and 7Be measured in leaves were both higher in autumn than in spring. However, the 210Pb activities increased throughout the growing season, while the 7Be activities reached the maximum in il summer. There were no significant differences in 5 the radionuclides' activities between J the different sampling sites and between the tree genera. A strong positive S correlation for 210Pb activities in linden leaves and in air during preceding months was obtained, suggesting that mature linden leaves could be used as | biomonitors of recent exposure to 210Pb. i, The seasonal pattern of the 7Be activity in leaves partly followed the seasonal pattern in aerosols, but no large positive a correlation was found. PB - Institute for Radioelements C3 - Book of Abstracts of the 6th International Symposium on In Situ Nuclear Metrology as a Tool for Radioecology, June 11–15, Brussels, Belgium T1 - Air radioactivity Monitoring by Higher Plants SP - 56 UR - https://hdl.handle.net/21.15107/rcub_veterinar_2412 ER -
@conference{ author = "Ajtić, Jelena and Todorović, Dragana and Popović, Dragana and Nikolić, Jelena", year = "2012", abstract = "Plants represent an important link in transport and distribution of radionu clides, heavy metals, and other pollu tants in the environment and are often used as biomonitors of atmospheric pol lution. In this paper, two deciduous tree genera, linden (Tilia tomentosa L. and Tilia cordata Mill.) and chestnut {Aesculus hippocastanum L), were analysed as biomonitors of radionuclides in air. The study was conducted in an urban area (the city of Belgrade, Serbia), from 2002 to 2009. The activities of radionuclides in soils, tree leaves and aerosols were determined on an HPGe detector (Can berra, relative efficiency 18 %) by stan dard gamma spectrometry. The mean activities of 137Cs, 40K,and 210Pb in soils were 34 Bq/kg d.w., 384 Bq/kg dw (dry weight), and 51 Bq/kg dw, respectively, while their mean acti vities in linden and chestnut leaves were 1.8 Bq/kg dw, 498 Bq/kg dw, and 46 Bq/kg dw, respectively. The mean ^Be activity in leaves was 125 Bq/kg dw. The activities in aerosols were of order 10-6 Bq/m3 for 137Cs, 10-4 Bq/m3 for 210Pb, and 10-3 Bq/m3 for 7Be. The calculated ”soil-to-leaves" transfer factors for 40K and 210Pb were 1.3 and 0.9, respectively. The transfer factor for i 137Cs was close to zero suggesting at- mospheric deposition as the primary mode of 137Cs accumulation in leaves. The 40K activity in leaves decreased towards the end of the growing season, reaching around 70 % of the spring maximum. The concentrations of 210Pb I and 7Be measured in leaves were both higher in autumn than in spring. However, the 210Pb activities increased throughout the growing season, while the 7Be activities reached the maximum in il summer. There were no significant differences in 5 the radionuclides' activities between J the different sampling sites and between the tree genera. A strong positive S correlation for 210Pb activities in linden leaves and in air during preceding months was obtained, suggesting that mature linden leaves could be used as | biomonitors of recent exposure to 210Pb. i, The seasonal pattern of the 7Be activity in leaves partly followed the seasonal pattern in aerosols, but no large positive a correlation was found.", publisher = "Institute for Radioelements", journal = "Book of Abstracts of the 6th International Symposium on In Situ Nuclear Metrology as a Tool for Radioecology, June 11–15, Brussels, Belgium", title = "Air radioactivity Monitoring by Higher Plants", pages = "56", url = "https://hdl.handle.net/21.15107/rcub_veterinar_2412" }
Ajtić, J., Todorović, D., Popović, D.,& Nikolić, J.. (2012). Air radioactivity Monitoring by Higher Plants. in Book of Abstracts of the 6th International Symposium on In Situ Nuclear Metrology as a Tool for Radioecology, June 11–15, Brussels, Belgium Institute for Radioelements., 56. https://hdl.handle.net/21.15107/rcub_veterinar_2412
Ajtić J, Todorović D, Popović D, Nikolić J. Air radioactivity Monitoring by Higher Plants. in Book of Abstracts of the 6th International Symposium on In Situ Nuclear Metrology as a Tool for Radioecology, June 11–15, Brussels, Belgium. 2012;:56. https://hdl.handle.net/21.15107/rcub_veterinar_2412 .
Ajtić, Jelena, Todorović, Dragana, Popović, Dragana, Nikolić, Jelena, "Air radioactivity Monitoring by Higher Plants" in Book of Abstracts of the 6th International Symposium on In Situ Nuclear Metrology as a Tool for Radioecology, June 11–15, Brussels, Belgium (2012):56, https://hdl.handle.net/21.15107/rcub_veterinar_2412 .