Melamine-based dendronized magnetic polymer in the adsorption of Pb(II) and preconcentration of rhodamine B

In this research, magnetic BaFe2O4 nanoparticles (NPs) have been synthesized via the sol-combustion process using triethanolamine as fuel. Thereinafter, the silica coated NPs have been reacted with carbon disulfide and melamine to prepare magnetic polytriazine-thiourea dendronized nanohybrid. Prepared materials have been characterized by XRD, FT-IR, VSM, EDX, TGA, BET and FE-SEM techniques. In view of potential application, the nanohybrid was employed for rhodamine B (RB) preconcentration as well as Pb(II) adsorption from aqueous solutions. Results showed that equilibrium time for both analytes obtained within 5 min as RB and lead adsorption followed second order adsorption mechanism. Moreover, adsorption process followed the Freundlich isotherm model for the target analytes. Adsorbed RB and lead have been released from the sorbent surface with ethanol and HNO3 solution (0.1 mol L-1), respectively. Moreover, the sorbent showed good reusability after 5 cycles of sorption and desorption. (C) 2016 Elsevier B.V. All rights reserved.