放射性核素污染土壤的植物提取修复技术研究关键问题探讨

Abstract

Abstract: The paper investigated the key issues to research the phytoextraction technology of containmination of radionuclides in soil on the basis of the practical work for many years. It proposed when evloving the criterion of supper-accumulation plant, capability of uptake nuclide or heavy metal from the soil, growth speed of plant and its biomass should be took into account, particularly the plant biomass on the unit areas and the coefficient of accumulation amount should been lay stress on. The paper proposed the index of ratios of absolute and relative phytoextraction and offered a proposal system of screening supper-accumulation plant. It presented solution culture (soilless cultivation) should be used for preliminary selection, sewage irrigation pot method and the plot simulation experiment for shortlist selection of supper-accumulation plant species, and then field-tested in the polluted areas to demonstration and validate. It proposed the concentration and concentration gradient of nuclide and heavy metal should be set up properly in the simulation soil of the pollution. It is viable to use stable isotope to replace the radioactive isotope in the experiment to research the effect of plant growth,screening of supper-accumulation plant species and application of supper-accumulation plant species in the phytoremediation. And it summarized the strengthen techniques and complemental agricultural cultivation techniques in favour of phytoremediation.

Key words: radioactive, nuclide, containminated soil, phytoextraction, phytoremediation

CLC Number:

Wang Dan, Chen Xiaoming, Tang Yunlai. Discussion on key issues to research the phytoextraction technology of containmination of radionuclides in soil[J].RADIATION PROTECTION, 2016, 36(2): 94-103.

References

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Discussion on key issues to research the phytoextraction technology of containmination of radionuclides in soil

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