Radionuclides’ content in forest ecosystem located in southwestern part of Serbia

Abstract

Forests, with a large coverage of lands area, represent important ecosystem. They have greater ability to absorb atmospheric pollutant, including radionuclides compared to other vegetation types. Thus it is important to monitor radionuclides concentration in forest ecosystems. The results of the first gamma-spectrometric measurements in 16500 ha large region of South-western Serbia are presented. It is investigated activity concentrations of 40K, 137Cs and 210Pb in different deciduous and evergreen trees in the region. For all investigated isotopes, it was observed tendency that the smallest activity concentrations in average were found in tree stem, than in leaves, while the highest ones were in soil. Statistical analysis did not show any differences between activity concentrations of leaves and needles, showing that both leaves and needles could be equally well used as a biomonitors.

Radıometrıc Measurements in of Ladybird (Berberis Thunbergii), Bowood (Buxus Sempervirens Rotundifolia) and Gold Tassel (Euonymus Japonica Var. Aurea) Under Cadmıum and Zınc Stress

“…In another study examining the medicinal plants used in traditional medicine in Thailand, the mean 40K activity concentration was found to be 610±260 Bq kg -1 and TF value to be 2.0±1.4 and it was determined that the activity concentration was at a higher level in leaves in comparison to flowers and stem Saenboonruang et al [7]. In their study carried out on forests in Southwestern Serbia region, Hadrovıć et al [34] reported the 40K activity concentration of evergreen species to be 102 ± 25 Bq kg -1 , that of non-evergreen species to be 140 ± 26 Bq kg -1 , and that of samples from the soil, where the plants were grown, to be 62±5-970±60 Bq kg -1 . TF (40K) was found to be 0.022-0.22 in non-evergreen species and 0.007-0.19 in coniferous species.…”

“…137Cs activity concentrations in soil and grass in Bangladesh were reported to be 0.17 ± 0.02 Bq kg -1 and 2.41 ± 0.18 Bq kg -1 , respectively, whereas TF value was found to be 0.061 [31]. Shayeb et al [34] compaJapanaesethe 137Cs activity concentrations in date and soil samples collected from different regions of Saudi Arabia and they reported the activity in soil to be 10.2 ± 2.1 Bq kg -1 and the activity in date samples to be below the limit of detector. In a study carried out using tea leaves, 137Cs activity concentration was found to be <0.4 Bq kg -1 in the leaves and 3±1-10±1 Bq kg -1 in the soils, whereas TF (137Cs) was found to be belwo the limit of detector [4].…”

“…Hadrovıć e al. [34] examining the 137Cs activity concentration in forests of Southwestern Serbia reported the 137Cs activity concentration to be 4.9 ± 7.1 Bq kg -1 in some non-evergreen species and 5.9 ± 4.8 Bq kg -1 in evergreen samples. TF (137Cs) was found to be 5.2 in non-evergreen trees and in the range between 0.021 and 0.18 in coniferous species and activity concentration and TF values were found to be at the highest in leaves.…”

Radioactivity concentration and transfer factors of natural radionuclides 226Ra, 232Th, and 40K from peat soil to vegetables in Selangor, Malaysia

“…where A Ei rep re sents the ab sorp tion of the i th radionuclide via the soil-plant path way by dry veg e ta ble weight from dry soil weight [17].…”

Evaluation of radiation hazards and risk assessment in agricultural soil and commonly consumed vegetables in the district of Klang, Malaysia

“…The ac tiv ity con centra tion of 40 K was di rectly an a lyzed us ing the gamma-ray line at 1461 keV (10.7 %) rep re sented in tab. 1 [5,6]…”