Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (4): 34 doi: 10.1007/s41365-020-0744-6


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

Shi-Chang Zhang 1, Shun-Yan Ning 1,  Jie Zhou 1, Si-Yi Wang 1, Wei Zhang 1, Xin-Peng Wang 1, Yue-Zhou Wei 1,2   

  1. 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
  • Received:2020-01-03 Revised:2020-02-04 Accepted:2020-02-10
  • Contact: Shun-Yan Ning
  • Supported by:
    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), and the Science and Technology Major Project of Guangxi Province (No. AA17204100).
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Shi-Chang Zhang, Shun-Yan Ning, Jie Zhou, Si-Yi Wang, Wei Zhang, Xin-Peng Wang, Yue-Zhou Wei. New insight into the adsorption of ruthenium, rhodium, and palladium from nitric acid solution by a silica-polymer adsorbent.Nuclear Science and Techniques, 2020, 31(4): 34     doi: 10.1007/s41365-020-0744-6

Abstract: A porous silica-polymer based adsorbent, isoBu-BTP/SiO2-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 isoBu-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 (SFPGM/M>40) in 1 M HNO3 solution, The adsorption process conformed to the pseudo-second-order model and Langmuir model. From the UV, FT-IR 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-0.1 M thiocarbamide solution, 5 M 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 isoBu-BTP/SiO2-P was designed and proposed.

Key words: BTP, Adsorption, Ruthenium, Rhodium, Palladium, High-level liquid waste