英语翻译
Abstract
\x09We assessed the accumulation of uranium (VI) by a bacterium,Bacillus subtilis,suspended in a slurry of kaolinite clay,to elucidate the role of microbes on the mobility of U(VI).Various mixtures of bacteria and the koalinite were exposed to solutions of 8 10 6 M- and 4 10 4 M-U(VI) in 0.01 M NaCl at pH 4.7.After 48 h,the mixtures were separated from the solutions by centrifugation,and treated with a 1 M CH3COOK for 24 h to determine the associations of U within the mixture.The mixture
exposed to 4 10 4 M U was analyzed by transmission electron microscope (TEM) equipped with EDS.The accumulation of
U by the mixture increased with an increase in the amount of B.subtilis cells present at both U concentrations.Treatment of kaolinite with CH3COOK,removed approximately 80% of the associated uranium.However,in the presence of B.subtilis the amount of U removed was much less.