铀氧化物在人体模拟肺液中的溶解特性

The solubility characteristics of uranium oxide in simulated lung fluid

目的 研究现场采集的不同粒径铀氧化物在人体模拟肺液和相关的缓冲体系中的溶解特性。方法 用Cascade采样器将氧化铀按粒径分级 ,观察不同粒径铀氧化物在模拟肺液和缓冲液中不同时间的累积溶解百分数。结果 小粒径铀氧化物在模拟肺液中的溶解度相对较高 ,且溶解速率随时间增加而增大。铀氧化物在HAc NaAc体系中的溶解速率随酸度增加而加快 ,在碱性NH4OH NH4Cl体系中溶解速率随碱性增加而加快。铀氧化物在Na2 CO3 溶液中易溶 ,在NaH2 PO4 Na2 HPO4体系中几乎不溶。结论 小粒径铀氧化物在模拟肺液中溶解度较高。铀氧化物易溶于酸性HAc NaAc体系、碱性NH4OH NH4Cl体系和Na2 CO3 溶液 ,不溶于NaH2 PO4 Na2

Objective\ To investigate the solubility characteristics of uranium oxide with different particle sizes,which was collected at site scene,in simulated lung fluid and other correlative buffer systems.Methods\ Uranium oxide particles were classified with a cascade impector.The percentage of cumulative soluble uranium with different particle sizes in simulated lung fluid and buffer solutions at different times were observed.Results\ Uranium oxides with smaller particle sizes had better solubility in simulated lung fluid and the solubility became higher with increase of time.The solubility of uranium oxide also became faster along with the increase of acidity of HAc\|NaAc buffer and increase of alkalinity of NH\-4OH\|NH\-4Cl buffer systems.Uranium oxide was soluble in Na\-2CO\-3 solution and basically insoluble in NaH\-2PO\-4\|Na\-2HPO\-4 solution.Conclusions\ Uranium oxides with smaller particle sizes have better solubility than bigger ones in simulated lung fluid.Uranium oxide is soluble in acidic HAc\|NaAc,alkaline NH\-4OH\|NH\-4Cl buffer systems and Na\-2CO\-3 solution,but insoluble in NaH\-2PO\-4\|Na\-2HPO\-4 solution.