MoS42- exchanged NO3- in poly-phenylglycine spherical particles for efficient removal of Pb2+ ions

Designing fast, eco-friendly, and effective adsorbent capable to eradicate heavy metal ions from complex environmental area is crucial so far. In this regard, MoS4 doped poly-N-phenylglycine MoS4-PPG composites have been prepared herein through radical polymerization. Such a composites have been obtained after an initial synthesizes of NO3 doped poly-N-phenylglycine (NO3-PPG) using Fe3+ as oxidant followed by ion exchange method. Scanning electron microscopy (SEM) illustrates the high homogeneity of the mixture composed of spherical MoS4-PPG particles. The stoichiometry of MoS4 has been determined via energy dispersive x-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS). Fourier transform infrared (FTIR) spectroscopy and Raman analysis also confirm the substitution of NO3- with MoS42- ions. A significant adsorption of MoS4-PPG for Pb2+ in aqueous solution with qexp of about 59.53 mg/g is observed owing to the anchored sulfide groups. The experimental data have been properly fitted through Langmuir model when the removed monolayer of Pb2+ ions occupy the entire adsorbent surface.

Automated summary

Designing fast, eco-friendly, and effective adsorbents to remove heavy metal ions from complex environments is crucial. In this study, MoS4 doped poly-N-phenylglycine (MoS4-PPG) composites were synthesized through radical polymerization. The composites showed high homogeneity and exhibited significant adsorption of Pb2+ ions in aqueous solution.