Alhajji E, Al-Masri M S, Khalily H, Naoum B E, Khalil H S, Nashawati A
Department of Protection and Safety, Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, Syria.
Bull Environ Contam Toxicol. 2016 Aug;97(2):255-60. doi: 10.1007/s00128-016-1852-1. Epub 2016 Jun 21.
The sorption of radium 226 ((226)Ra) on different clay materials (bentonite, illite and a mixture of bentonite-illite) was studied. Clay materials are used in the construction of disposal pits for technically enhanced naturally occurring radioactive materials (TENORM) wastes (i.e., contaminated soil and sludge) generated by the oil and gas industry operations. Experimental conditions (pH, clay materials quantity, and activity concentrations of (226)Ra) were changed in order to determine the optimal state for adsorption of (226)Ra. The results showed that the concentration of adsorbed (226)Ra on clay materials increased with time to reach an equilibrium state after approximately 5 h. More than 95 % of the radium was adsorbed. The mixture of bentonite-illite (1/9) exhibited the greatest adsorption of radium under all experimental conditions.
研究了镭226（²²⁶Ra）在不同粘土材料（膨润土、伊利石以及膨润土 - 伊利石混合物）上的吸附情况。粘土材料用于建造处置坑，以处理石油和天然气工业运营产生的技术增强型天然放射性物质（TENORM）废物（即受污染的土壤和污泥）。改变实验条件（pH值、粘土材料数量和²²⁶Ra的活度浓度）以确定²²⁶Ra吸附的最佳状态。结果表明，粘土材料上吸附的²²⁶Ra浓度随时间增加，约5小时后达到平衡状态。超过95%的镭被吸附。在所有实验条件下，膨润土 - 伊利石（1/9）混合物对镭的吸附能力最强。
