放射性遗留废石堆的微生物分布规律与核素固化

Study on Microbial Distribution Rule and Nuclide Curing of Uranium Waste Dumps

为了更好地发挥微生物在放射性污染环境中的环境净化作用,选择川西北某铀矿区为研究对象,利用生物学方法研究其中两个代表性放射性遗留废石堆中的微生物多样性及其在放射性污染环境中的分布规律。结果表明,在该研究区遗留废石堆中主要赋存着细菌、放线菌和霉菌3种菌,其中以细菌占绝对优势;对优势微生物———细菌分离鉴定获得3种优势菌株,鉴定结果为玫瑰色库克菌(Kocuria rosea strain)、短杆菌(Brevibacterium sanguinis)和枯草芽孢杆菌(Bacillus subilis/atropheaus)。研究认为,玫瑰色库克菌(Kocuria rosea strain)在当地的放射性核素耐受性最好。

In order to play the important role of environmental rehabilitation by microorganisms in radioactive environment, a uranium ore was chosen in the study as the research object in Northwest Sichuan. Meanwhile, the authors took the advantage of the method of biology to study the microbial distribution law and the radioactive pollution of the environment, which was uranium waste ore of two representatives. The results showed that there were throe kinds of microorganism such as bacteria, actinomycetes and fungi. Generally speaking, the bacteria was better than any other one. The authors obtained throe kinds of bacteria from dominant microorganisms, including Kocuria rosea strain, Brevibacterium sanguinis and Bacillus subilis/ atropheaus. The result indicated that Kocuria rosea strain was the best tolerance of the radionuclide.