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合成了６种ＳｉＯ２－ＴｉＯ２复合水合氧化物胶体，研究了它们对铀的吸附．结果表明，离子强度对该二元复合胶体吸附铀的影响与溶液中铀的浓度有关；吸附铀的最佳ｐＨ范围为４～７；复合氧化物胶体中Ｓｉ与Ｔｉ的最佳摩尔比为１３．用不完全交换热力学理论估算了该交换过程的热力学函数．
Six kinds of SiO2-TiO2 hydrated oxide colloids were synthesized and their adsorption on uranium was studied. The results show that the effect of ionic strength on the uranium adsorption by the binary composite colloid is related to the concentration of uranium in the solution. The optimal pH range for adsorption of uranium is 4 ~ 7. The optimum molar ratio of Si and Ti in the complex oxide colloid is 13 . The thermodynamic function of this exchange process is estimated using the incomplete exchange theory of thermodynamics.