Preparation of halloysite@graphene oxide composite and its application for high-efficient decontamination of U(VI) from aqueous solution
Preparation of halloysite@graphene oxide composite and its application for high-efficient decontamination of U(VI) from aqueous solution
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DOI：
10.1016/j.molliq.2016.04.057
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发表时间：
2016-08
影响因子：
6
通讯作者：
Jiang Xiao;Shaolei Xie;Y. Jing;Ying Yao;Xingquan Wang;Yongzhong Jia
中科院分区：
文献类型：
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作者：
Jiang Xiao;Shaolei Xie;Y. Jing;Ying Yao;Xingquan Wang;Yongzhong Jia
随着核能的和平利用和核工业的快速发展，各种放射性核素的安全处理和处置是核场地的一项重要任务[1],[2],[3]。铀（VI）是六价锕系元素的化学同系物（t 1/2 (235 U)= 7.04× 10 8 a；t 1/2 (238 U)= 4.47× 10 9 a），是核燃料循环中不可替代的材料之一[4]。同时，它也是各种核过程中极易泄漏到空气、土壤和水系统中的危险放射性核素之一。接触铀会对生物组织产生严重的生化和放射性伤害，包括中毒性肝炎、皮肤腐蚀、肾损伤、组织病理系统损伤甚至癌症。为了生态系统的稳定和公众健康，有必要将环境中的U（VI）浓度降低到允许的限度。随着对无线电安全和放射性废物处理的要求不断提高，对新技术的重视也随之增加。迄今为止，去除放射性废液的技术多种多样，如过滤、表面络合、化学沉淀、离子交换、吸附和膜处理等[5]、[6]、[7]、[8]、[9]、[10]、[11]、[12]。在这些方法中，吸附法因其操作简单、能耗低、可以大规模应用于实际应用而优于其他技术[13]，[14]。
With the peaceful utilization of nuclear energy and the rapid development of nuclear industry, the safe treatment and disposal of various radionuclides is an essential task in the nuclear sites [1],[2],[3]. Uranium (VI), a chemical homolog of hexavalent actinides (t 1/2 (235 U)= 7.04× 10 8 a; t 1/2 (238 U)= 4.47× 10 9 a), is one of non-substitutable materials in the nuclear fuel cycle [4]. Meanwhile, it is also one of the hazardous radionuclides that can be easily spilled into the air, soil and water systems during various nuclear processes. Exposure to uranium can induce serious biochemical and radioactive harms to the biological organization, including toxic hepatitis, skin corrosion, kidney injury, histopathological system damage and even cancers. For the sake of ecosystem stability and public health, it is necessary to decrease the concentration of U (VI) in the environment to the permissible limits.The emphasis on novel technologies has also increased by the increasing demands on radio safety and radioactive waste disposal. Up to now, various technologies for removing radioactive waste solution, such as filtration, surface complexation, chemical precipitation, ion exchange, adsorption and membrane processing [5],[6],[7],[8],[9],[10],[11],[12]. Among these methods, adsorption has been found to be superior to other techniques because of it is easy to operate, low energy consumption and can be applied on a large scale for practical applications [13],[14].