Abstract
Purification and recovery of strategic W/Mo/Re from wastewaters face a dual concern for resource recovery and environmental pollution. In this work, a novel manganese ferrite nanoparticles (MFO-NPs) was prepared from the low-grade manganese ore via pyrometallurgical transformation followed by nano sanding. The effects of pH, initial concentration, and reaction time on adsorption behaviors of simplex and mixed W/Mo/Re by MFO-NPs were investigated. Single anion adsorption indicated that molybdate and tungstate adsorption were consistent with the Langmuir isotherm model with the highest adsorption capacities of 41.985 mg/g and 85.61 mg/g, respectively; whereas rhenate was not adsorped. Selective separation indicated that W was firstly separated by MFO-NPs adsorption at pH of 5. After that, Mo was further adsorped by MFO-NPs at pH of 2–4 while Re was kept in the raffinate. The possible selective adsorption mechanism was based on the difference of electrostatic adsorption, polar adsorption, and complexing reaction between MFO-NPs and W/Mo/Re anions, which had various ionic forms under different pH values. Compared with the MFO-NPs prepared by wet chemistry methods, the novel MFO-NPs proposed in this work not only showed satisfactory adsorption capacity but had huge potential for the selective separation of W, Mo, and Re.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
