Accumulation of <226>Ra by different plant species
The remediation of radionuclides from the environment is important for human health because the emitted ionizing radiation affects people by depositing energy in the body tissues. In this way, larger doses can cause extensive cellular damage and result in cell death. But even low levels of radionuclides in chronic exposure are considered to produce genetic effects, precancerous lesions, benign tumors, cataracts, skin changes and congenital defects. A phytoremediation study was performed on old uranium mill tailings waste depot of a former uranium ore reprocessing factory in South Bohemia. The objectives of our work were to: (i) perform a geobotanical study of the plants growing in this area; (ii) determine the distribution of <226>Ra among selected plant species; (iii) carry out the biomonitoring of recultivated areas; (iv) test the low contaminated site for production of non-food plants and (v) propose the mechanism of clean-up of water contained uranium and <226>Ra. We will present the results from greenhouse experiments and data from experiments in situ. The distribution of <226>Ra in contaminated soil was found to be extremely variable (from 7 to 32 Bq <226>Ra/g of DW). No direct relation was proved between plant species characteristics and their radioactivity content. The results showed a great range of variation in the accumulation of <226>Ra by the plant species found.
<226>Ra uptake phytoremediation
Petr Soudek Sarka Petrova Dagmar Benesova Tomas Vanek
Laboratory of Plant Biotechnologies, Joint laboratory of IEB AS CR, v. v. i. and RICP, v. v. i., Rozvojov 263, 16502 Prague 6 Lysolaje, Czech Republic
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
435-436
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）