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237Np(Ⅴ)由于其长半衰期(2.14×106 a)、高毒性和易于迁移等特性已被证明是环境中最危险的放射性核素之一。为了预测Np(Ⅴ)在环境中的迟滞和迁移,需了解Np(Ⅴ)的吸附反应机理及其化学形态信息。研究显示,含铁矿物作为环境岩土和沉积物的主要成分之一,对U、Np、Pu等锕系核素的摄取能力比硅铝型矿物更强,是锕系元素的重要吸附剂。因此,研究Np(Ⅴ)在含铁矿物界面的吸附形态具有十分重要的意义。然而,有关Np在含铁矿物界面吸附的分子水平的研究仍十分稀
237Np (Ⅴ) has proven to be one of the most dangerous radionuclides in the environment due to its long half-life (2.14 × 106 a), high toxicity and ease of migration. In order to predict the hysteresis and migration of Np (Ⅴ) in the environment, it is necessary to know the adsorption reaction mechanism and chemical morphological information of Np (Ⅴ). Studies have shown that iron minerals, as one of the main components of environmental geotechnics and sediments, have stronger uptake capacity of actinide such as U, Np and Pu than silico-aluminous minerals and are important adsorbents of actinides . Therefore, it is of great significance to study the adsorption morphology of Np (Ⅴ) at the interface of ferrous minerals. However, the research on the molecular level of adsorption of Np at the iron-bearing mineral interface is still very rare