Korea Atomic Energy Research Institute, 1045 Daedeok daero, Yuseong, Daejeon 305-353, Republic of Korea.
J Hazard Mater. 2011 Oct 15;193:52-8. doi: 10.1016/j.jhazmat.2011.07.032. Epub 2011 Jul 18.
The dynamic precipitation characteristics of UO(4) in different solution conditions (pH, ionic strength, uranium and H(2)O(2) concentrations) were characterized by measuring changes in the absorbance of the precipitation solution and by monitoring the change of particle size in a circulating particle size analyzer. The precipitation solution conditions affected the precipitation characteristics such as the induction time, precipitation rate, overall precipitation time, and particle size in a complex manner. With increases in both pH and ionic strength, the induction time was prolonged, and the individual particle size decreased, but the individual particles tended to grow by aggregation to form larger precipitates. The uranium concentration and the ionic strength of the solution affected the induction time and precipitation rate to the greatest extent.
采用测定沉淀溶液吸光度和循环颗粒粒径分析仪监测颗粒粒径变化的方法，考察了不同溶液条件（pH 值、离子强度、铀浓度和 H2O2浓度）下 UO4的动力学沉淀特性。沉淀溶液条件以复杂的方式影响诱导时间、沉淀速率、总沉淀时间和颗粒尺寸等沉淀特性。随着 pH 值和离子强度的增加，诱导时间延长，单个颗粒尺寸减小，但颗粒倾向于通过聚集生长形成更大的沉淀物。铀浓度和溶液离子强度对诱导时间和沉淀速率的影响最大。
