An advanced partitioning process for key elements separation from high level liquid waste

查看全文 作　　者：WEI [1,2]YueZhou;WANG [1]XinPeng;LIU [1]RuiQin;WU [1]Yan;USUDA [1]Shigekazu;ARAI [3]Tsuyoshi

机构地区：[1]School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;[2]Cyclotron and Radioisotope Center, Tohoku University, Aoba-ku, Sendai 980-8578, Japan;[3]Shibaura Institute of Technology, Koto-ku, Tokyo 135-8548, Japan

出　　处：《Science China Chemistry》索引2012年第55卷第9期,共6页

基　　金：supported by the National Natural Science Foundation of China (91026019,91126006) 摘　　要：To separate MA(Am,Cm) and some fission product elements(FPs) such as Tc,Pd,Cs and Sr from high level liquid waste(HLLW) systematically,we have been studying an advanced aqueous partitioning process,which uses selective adsorption as the separation method.For this process,we prepared several novel adsorbents which were immobilized in a porous silica/polymer composite support(SiO 2-P).Adsorption and separation behavior of various elements was studied experimentally in detail.Small scale separation tests using simulated HLLW solutions were carried out.Pd(II) was strongly adsorbed by the AR-01 anion exchanger and effectively eluted off by using thiourea.Successful separation of Pd(II) from simulated HLLW was achieved.Tc(VII) also exhibited strong adsorption on AR-01 and could be eluted off by using U(IV) as a reductive eluent.Am(III) presented significantly high adsorbability and selectivity onto R-BTP/SiO 2-P adsorbents over various FPs including Ln(III).The R-BTP adsorbents were fairly stable in 3 M HNO 3,but instable against-irradiation-3M HNO 3.An advanced partitioning process consisting of three separation columns for the target elements separation from HLLW was proposed and the obtained experiment results indicated that the proposed process is essentially feasible. 关键词：模拟高放废液分离方法分区选择性吸附阴离子交换剂钯(Ⅱ) HNO3 吸附剂

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An advanced partitioning process for key elements separation from high level liquid waste

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