Abstract
We report the fabrication and application of high-performance and acid-tolerant fibers comprising polyethylenimine (PEI) and polyvinyl chloride (PVC) for platinum recovery from acidic waste solutions. The fibers were fabricated by amination of PVC with PEI and spin-extrusion via phase-inversion mechanism. Factors including the effects of chloride concentration, pH, competing ions, and amount of PEI on the adsorption performance, were studied. The adsorption mechanism was evaluated through XPS analysis, in which electrostatic binding of Pt(IV) and its partially reduced Pt(II) were revealed. The maximum Pt adsorption capacity in 0.1 M HCl was estimated by the Langmuir isotherm model as 410.53 mg/g. The fibers were applicable to Pt recovery from actual metal refining wastewater and demonstrated high efficiency of regeneration through adsorption-desorption cycles.
Sign-in/Register to access full text options 
Free) 
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 call
