摘要
采用静态法研究了铀酰离子在Zr2O(PO4)2、ZrP2O7上的吸附行为。铀酰离子在Zr2O(PO4)2、ZrP2O7上的吸附受体系pH值的影响很大,随pH值升高吸附百分比增大;由于2种磷酸盐合成温度、磷锆比的不同,其吸附边界也不相同。在研究范围内,离子强度对铀酰离子在Zr2O(PO4)2、ZrP2O7上吸附的影响很小;在低pH下,加入富里酸能增大铀酰离子在Zr2O(PO4)2上的吸附,而对铀酰离子在ZrP2O7上的吸附基本无影响;几种简单有机酸邻苯二酚、苯二甲酸氢钾、水杨酸加入体系后,对铀酰离子在Zr2O(PO4)2、ZrP2O7的吸附影响很小。
The sorption behavior of UO22+on two kinds of zirconium phosphate was studied by batch technique.The sorption of UO 2+ 2on Zr2O(PO 4 ) 2,ZrP2O7is strongly dependent on pH;and weakly dependent on ionic strength at moderate concentration(10 -1 -10 -3 mol/L) . The experimental results indicate that the sorption behaviors of uranium(Ⅵ) on the two kinds of zirconium phosphate are obviously different,and are determined by the sintering temperature and the mole ratio(r=n(PO4) /n(Zr) ) .While in the presence of fulvic acid,the sorption of UO 2+ 2on Zr2O(PO 4 ) 2at relatively low pH(pH4.5) is enhanced,however there are no significant influence on the sorption of UO 2+ 2on ZrP2O7in the presence of fulvic acid.It is also very interesting that the effect of catechol,phthalate and salicylate on the sorption of uranium(Ⅵ) to Zr2O(PO4) 2and ZrP2O7is found to be week.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2010年第4期216-220,共5页
Journal of Nuclear and Radiochemistry
基金
国家自然科学基金资助项目(20871062
J0630962)
关键词
磷酸锆
吸附
铀
zirconium phosphate
sorption
uranium