REMEDIATION OF URANIUM CONTAMINATED SOILS WITH BICARBONATE EXTRACTION AND MICROBIAL U(VI) REDUCTION

被引:129
作者
PHILLIPS, EJP [1 ]
LANDA, ER [1 ]
LOVLEY, DR [1 ]
机构
[1] US GEOL SURVEY,RESTON,VA 22092
来源
JOURNAL OF INDUSTRIAL MICROBIOLOGY | 1995年 / 14卷 / 3-4期
关键词
BIOREMEDIATION; URANIUM; MILL TAILINGS; DESULFOVIBRIO;
D O I
10.1007/BF01569928
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
A process for concentrating uranium from contaminated soils in which the uranium is first extracted with bicarbonate and then the extracted uranium is precipitated with U(VI)-reducing microorganisms was evaluated for a variety of uranium-contaminated soils. Bicarbonate (100 mM) extracted 20-94% of the uranium that was extracted with nitric acid. The U(VI)-reducing microorganism, Desulfovibrio desulf,-icans reduced the U(VI) to U(IV) in the bicarbonate extracts. In some instances unidentified dissolved extracted components, presumably organics, gave the extract a yellow color and inhibited U(VI) reduction and/or the precipitation of U(IV). Removal of the dissolved yellow material with the addition of hydrogen peroxide alleviated this inhibition. These results demonstrate that bicarbonate extraction of uranium from soil followed by microbial U(VI) reduction might be an effective mechanism for concentrating uranium from some contaminated soils.
引用
收藏
页码:203 / 207
页数:5
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