同位素2018，Vol.31Issue(2)：84-92,9.DOI:10.7538/tws.2017.youxian.050
电子转移活化再生催化剂原子转移自由基聚合法制备吸附剂及其吸铀性能
Preparation of ARGET ATRP Adsorbents with Diffident Degree of Grafting and Their Uranium Uptake
摘要
Abstract
Seawater is considered to be a major source of uranium with an estimated quantity of around 4.5 billion metric tons,which is nearly 1 000 times higher than that available in terrestrial ores.To satisfy the needs of Chinese nuclear power industry development,extracting uranium from seawater is particularly important.Amidoxime groups can extract uranyl ions efficiently with a strong complexation ability and high selectivity.Therefore,the preparation of adsorbents is the key to the extraction uranium from seawater.In this study,we developed effective adsorbent fibers for the recovery of uranium from seawater via electron transfer activated regeneration atom-transfer radical polymerization (ARGET ATRP) from a polyvinyl chloride (PVC) fiber,and we got the different degree of grafting adsorbent by controlling the amount of acrylonitrile.Fourier Transform Infrared Spectroscopy indicated the grafted nitrile groups were converted to amidoxime groups by treating with hydroxylamine.Scanning electron microscopy was used to observe the surface morphologies of different degree of grafting adsorbent.The results showed that the optimum pH value of amidoxime adsorbents for the adsorption of uranyl ion was 5～6.With the increase of the degree of grafting of the adsorbent,the adsorption capacity and the adsorption rate were both increased,and the adsorption capacity of the adsorbent with the degree of grafting of 5 811％ reached 111 mg/g.However,with the increase of the degree of grafting of the adsorbent,the gelling generated on the surface of the adsorbent hinders the adsorbent from adsorbing uranyl ions.关键词
海水提铀/偕胺肟/接枝率/吸铀性能Key words
recovery uranium from seawater/amidoxime/grafting yield/absorption properties of uranium分类
能源科技引用本文复制引用
安鹏,匙芳廷,文君,张硕,金路,胡胜,熊洁,晏良宏..电子转移活化再生催化剂原子转移自由基聚合法制备吸附剂及其吸铀性能[J].同位素,2018,31(2):84-92,9.基金项目
国家自然科学基金资助项目(21401152) （21401152）
四川省教育厅项目(16ZB0134) （16ZB0134）
核废物与环境安全国防重点学科实验室预研基金(15yyhk08) （15yyhk08）
核废物与环境安全国防重点学科实验室团队项目(14tdhk01) （14tdhk01）
西南科技大学创新基金项目(cx17-017) （cx17-017）
