New insight into the adsorption of ruthenium,rhodium,and palladium from nitric acid solution by a silica-polymer adsorbent  

作　　者：Shi-Chang Zhang Shun-Yan Ning Jie Zhou Si-Yi Wang Wei Zhang Xin-Peng Wang Yue-Zhou Wei 

机构地区：[1]Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials,School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China [2]School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Nuclear Science and Techniques》2020年第4期16-28,共13页核技术（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.11705032,11675102,and 11975082);the Natural Science Foundation of Guangxi Province(No.2017GXNSFBA198175);the Science and Technology Major Project of Guangxi Province(No.AA17204100).

摘　　要：A porous silica-polymer-based adsorbent,isoBuBTP/Si O2-P,was prepared by a vacuum impregnation method and used for the recovery of ruthenium,rhodium,and palladium from nitric acid solution.The experimental results revealed that iso Bu-BTP/SiO2-P exhibited unique adsorption properties such as high saturation adsorption capacity(Ru:0.35 mmol g^-1,Rh:0.32 mmol g^-1,Pd:1.05 mmol g^-1)and excellent selectivity over other metal ions,such as lanthanides(SF(PGM/M)>40)in 1 M HNO3 solution.The adsorption process conformed to the pseudosecond-order model and Langmuir model.From the UV,FTIR,and XPS analyses,it can be concluded that the strong affinity between functional groups(C–N=C)and metal ions as well as NO3-played a role in coordination during the adsorption process.Furthermore,the desorption behavior was studied,and it was found that the adsorbed Pd,Rh,and Ru could be eluted with a 0.01 M nitric acid–0.1M thiocarbamide solution,5M hydrochloric acid,and sodium hypochlorite(CP)solution,respectively.Finally,based on those findings,a simple process for the separation and recovery of Pd,Rh,and Ru from high-level liquid waste using iso Bu-BTP/SiO2-P was designed and proposed.

关 键 词：BTP ADSORPTION RUTHENIUM RHODIUM PALLADIUM High-level liquid waste 

分 类 号：X703[环境科学与工程—环境工程] O647.33[理学—物理化学]