Highly-efficient separation and recovery of ruthenium from electroplating wastewater by a mesoporous silica-polymer based adsorbent

• Published in: Microporous and mesoporous materials Vol. 303; p. 110293
• Main Authors: Zhang, Shichang, Ning, Shunyan, Liu, Hefang, Zhou, Jie, Wang, Siyi, Zhang, Wei, Wang, Xinpeng, Wei, Yuezhou
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 15.08.2020
• Subjects: Adsorption; Column experiments; Electroplating wastewater; Ruthenium; Separation; TRPO; TRPO; Ruthenium; Separation; Adsorption; Column experiments; Electroplating wastewater
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2020.110293

To separate ruthenium(III) from simulated electroplating wastewater, a kind of porous material, TRPO/SiO2–P, was used. TRPO/SiO2–P exhibited unique advantages compared with other materials, such as high selectivity (SFRu/other metals >35), large adsorption capacity (54.6 mg g−1), and fast adsorption kinetics (<3 h for equilibrium). The adsorption towards ruthenium was fitted with pseudo-second-order and Langmuir model. Moreover, ruthenium was efficiently separated from other metal ions from simulated electroplating wastewater by column experiments. Finally, SEM-EDS, XPS, FT-IR, and NMR study demonstrated the strong interaction between phosphorus functional groups (P=O) and ruthenium(III) during the whole adsorption process and meantime anion groups (NO3− and NO2−) were involved to maintain charge balance. In brief, TRPO/SiO2–P has significant potential in the recovery of ruthenium from electroplating wastewater. [Display omitted] •A silica-polymer based adsorbent TRPO/SiO2–P was prepared through vacuum impregnation method.•It exhibited excellent adsorption selectivity towards ruthenium from simulated electroplating wastewater.•The adsorption mechanism was studied by SEM-EDS, XPS, FT-IR, UV, and NMR analysis.•A process for separation of ruthenium from electroplating wastewater was proposed and proved.