| 微生物净化回收核工业废水中钚-239的研究 |
| 摘要点击 1759 全文点击 1247 投稿时间：1995-04-05 |
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| 中文关键词 微生物 Pu-239 净化回收 |
| 英文关键词 microbe Pn-239 purification recovery |
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| 中文摘要 |
| 从核工业含钚废水中分离、筛选了13株菌,观测了它们对钚-239的富集能力,从中获得了1株高效富集239的OR菌,将OR菌与酿酒酵母、脱硫弧菌、放线菌和从美国购进的少根霉比较,OR菌对239Pu富集力最高,OR菌富集'239Pu。的最佳条件是:pH 6,30℃。每ml溶液加入0.05g湿菌。作用5min,可去除99%的239Pu。用0.5mol/LNaHCO3解吸2次,可回收97%的239Pu。用α-能谱仪检测了OR菌体存在239Pu,结合扫描和透射电镜分析,OR菌对239Pu的吸附主要是细胞壁的表面吸附和絮凝作用,用C厂含239Pu的废水验证了最佳净化条件,对239Pu净化率为99%,回收率为95%。 |
| 英文摘要 |
| From Pu-containing wastewater from nuclear industry,13 strains of bacteria were isolated and screened out,and observed for their abilities of enriching Pu-239.One of them,called strain OR,was found to be one which can efficiently accumulate Pu-239 and to have the highest capacity of accumulating Pu-239 as compared to Desulphonibrio sp.,S. cvrevisliae,Actionmycetes sp.,and Rhizopus sp.,The optimum conditions under which strain OR can efficiently accumulate Pu-239 were pH6,30℃,and a dosage of 0.05g wet culture per ml of solution to be treated. Under these conditions,a Pu-339 removal of 99%was given by reacting for 5 min. and up to'97% of Pu-239 were recovered by desorbbing 2 times with 0.5 mol/L of NaHCO3.Alpha-energy'.spectrometric detection showed the presence of Pn-239 in the cells if strain OR. The analysis using scan electronic microscope in combination with transmission electronic microscope showed that the adsorption of Pu-239 onto strain OR occurred mainly due to the surface adsorption and flocculation of cell walls. |
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