Renewable Modified Cellulose Bearing Chelating Schiff Base for Adsorptive Removal of Heavy Metal Ions and Antibacterial Action

Abstract

A novel approach toward chemically modified cellulose bearing active chelating Schiff base with hydroxyl group (Cell-Hy) was synthesized. The modified cellulose was examined for its heavy metal ion uptake potential from aqueous solution. The chemical and structural features of the adsorbent were characterized by Fourier transform infrared spectroscopy (FT-IR), solid state 13C-NMR, Scanning Electron Microscopy (SEM), and energy dispersive analysis of X-ray (EDAX) observations. The experimental conditions and adsorption parameters, including pH, initial metal ion concentration, adsorbent dosage, temperature, and contact time were optimized for the removal of Cu(II) and Pb(II) ions. Kinetic parameters, equilibrium adsorption capacities, and correlation coefficients for pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were carried out. The data obtained from the adsorption of Cu(II) and Pb(II) onto Cell-Hy were subjected to Langmuir and Freundlich isotherm models. Thermodynamic parameters have also been evaluated. The antibacterial activity of modified cellulose was tested toward specific bacterial species.

Novel Schiff base transition metal complexes for imparting UV protecting and antibacterial cellulose fabric: Experimental and computational investigations

“…[ 28 ] Imparting antibacterial activity to cellulose powder by synthesizing Schiff base by condensation between p‐aminophenol and aldehyde groups. [ 29 ] Also, cellulosic fabric with UV protection properties has been modified using Schiff base of azobenzene ring. [ 11 ] More recently, piperazinyl Schiff base has been used to treat CF for potent antibacterial effects.…”

Archives of Metallurgy and Materials

“…All other analytical grade reagents were bought from merck, india upon without additional purification. Chemically modified cellulose (CmC) polymer synthesis carried out by following steps cellulose monomer dispersed in deionized water was stirred with 0.04m sodium metaperiodate (NaiO 4 ) solution at room temperature in dark as reported earlier [10]. 4 hrs later, a pale-yellow colour cellulose dialdehyde formed was separated and cleaned using distilled water till solution becomes neutral and dried under vacuum.…”

Critical Review of Bioadsorption on Modified Cellulose and Removal of Divalent Heavy Metals (Cd, Pb, and Cu)

“…Schiff bases are well-known chelating agents containing N, S, and O as donor atoms to coordinate with metal ions. Selective oxidation of the C 2 –C 3 bond of cellulose followed by condensation leading to Schiff base formation has been explored as one of the strategies for adsorption of heavy metal ions. , Sarvanan and Ravikumar oxidized cellulose with sodium periodate to cleave the bond between C-2 and C-3 atoms. The resulting 2,3-dialdehyde cellulose was condensed with p-aminophenol to introduce imine (Schiff base) and hydroxyl functionalities in the bioadsorbent.…”