亲水型偕胺肟吸附剂的ARGET-ATRP可控制备及其对铀的吸附性能  

Controlled Preparation of Hydrophilic Amidoxime Adsorbent by ARGET-ATRP and Its Adsorption Performance to Uranium

作　　者：张硕[1] 安鹏[1] 文攀 胡胜[2] 熊洁[2] 文君[2] 匙芳廷[1] 晏良宏[3] ZHANG Shuo;AN Peng;WEN Pan;HU Sheng;XIONG Jie;WEN Jun;CHI Fangting;YAN Lianghong(Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory,Southwest University of Science and Technology,Mianyang 621010,China;China Academy of Engineering Physics,P.O.Box 919-214,Mianyang 621900,China;China Academy of Engineering Physics,P.O.Box 919-987,Mianyang 621900,China)

机构地区：[1]西南科技大学核废物与环境安全国防重点学科实验室,四川绵阳621010 [2]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [3]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《原子能科学技术》2018年第1期22-29,共8页Atomic Energy Science and Technology

基　　金：国防重点学科实验室预研基金资助项目(15yyhk08)；核废物与环境安全国防重点学科实验室团队资助项目(14tdhk01)；西南科技大学创新基金资助项目(cx17-017)；西南科技大学创新基金精准资助专项(jz17-081)；核废物与环境安全国防重点学科实验室开放基金资助项目(16kfhk04)

摘　　要：吸附剂的制备是海水提铀的关键。本文以聚氯乙烯(PVC)为基材,采用电子转移活化再生原子转移自由基聚合(ARGET-ATRP)方法在PVC上引入偕胺肟(AO)和丙烯酸叔丁酯(tBA)基团,合成了偕胺肟基纤维吸附剂(PVC-AO-tBA)。在不同温度、铀溶液浓度和pH值条件下进行了PVC-AO-tBA吸附铀的实验研究,探讨了亲水单体tBA的引入对AO吸附剂吸铀性能的影响。结果表明,在同等条件下,PVC-AOtBA对铀的吸附量由PVC-AO的109mg/g提高到170mg/g;PVC-AO-tBA对酸碱度的适应范围更宽,最佳pH值由6扩展到4~6。动力学分析结果表明,吸附速率也有了明显上升。值得注意的是,在与海水酸碱度接近的弱碱性环境下,平衡吸附量由39mg/g提高到71mg/g,可见吸附效果得到明显提升。The preparation of adsorbent is the key to the extraction uranium from sea-water.In this paper,amidoxime(AO)and tBA were grafted onto the polyvinyl chloride(PVC)substrate by electron transfer activated regeneration atom transfer radical polymerization(ARGET-ATRP)method to form PVC-AO-tBA.The effects of the introduction of hydrophilic monomer of tBA on the properties of AO adsorbent were investigated by experimental study at different temperatures,uranium solution concentrations and pH.The results show that under the same conditions,the adsorption capacity of uranium on PVC-AO-tBA increases from 109 mg/g to 170 mg/g;the adaptability of the adsorbent to pH is stronger,and the optimum pH of extraction uranium extends from 6 to 4-6.The kinetics analysis shows that the adsorption rate also increases significantly.

关 键 词：海水提铀 偕胺肟 亲水单体 吸铀性能 

分 类 号：TL212[核科学技术—核燃料循环与材料]