土-水介质中低放核素污染物的生物修复

Bioremediation of low-level radionuclide contaminated soils and water.

各种人为因素使人类生态环境的放射性核素本底值不断增加 ,这些放射性核素一旦进入水 土介质 ,可通过各种途径产生污染危害 .常规的化学或物理方法不适用于水 土介质中低放核素污染物的治理 ,人类企图开发出新的修复技术以对付低放核素的污染问题 .生物修复以其低成本、环境搅动性少等优点而成为关注的对象 .本文介绍了环境中低放核素污染物的来源和低放核素生物修复的概念 ,并就国内外低放核素生物修复研究状况作一归纳和评述 ,在此基础上提出低放核素生物修复未来研究的方向 .

Different anthroponic factors have led up to increasing background concentrations of radionuclides in human ecosystems.As long as these radionuclides enter into soil-water substrates,they can pose hazards to human health through different pathways.Since most conventional chemical or physical procedures are not practical for dealing with low-level radionuclides in the water-soil substrates,new remediation technologies are being developed to tackle the problem.Bioremediation has attracted much attention because of its many advantages such as low cost and less environmental disturbance.The present paper summarizes the sources of radionuclides and introduces the concept of low-level radionuclide bioremediation.The state of the art in the field of bioremediation of low-level radionuclide contaminated water-soil substrates has also been reviewed and summarized in this paper.On the basis of above mentioned discussions the future developing trends were put forward.