Removal of Pb(II) Ion from Aqueous Solution by an Engineered Novel Chitosan Functionalized Schiff-Base Adsorbent

A new adsorbent was synthesized to for the adsorption of Pb+2 from aqueous solutions.The magnetic chitosan-(d-glucosimine methyl) benzaldehyde, (MCS-Sch) was characterizedby Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM),energy dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), vibrating samplemagnetometer (VSM) and X-ray Diffraction (XRD) [1]. Batch adsorption experimentswere done under various conditions, such as adsorbent dose, pH and contact time. The equilibriumdata were fitted to Langmuir and Freundlich isotherm models [2]. The maximummonolayer capacity obtained from the Langmuir isotherm was 121.10 mg/g. The MCS-Schwas found to be regenerated effectively up to five efficient cycles of adsorption/desorptionprocesses. The mechanism for Pb+2 adsorption onto MCS-Sch involved the interactions ofnitrogen and oxygen atoms and also aromatic rings with heavy metal followed by their adsorptionon the MCS-Sch.