The Use of New Chemically Modified Cellulose for Heavy Metal Ion Adsorption and Antimicrobial Activities

Abstract

A novel chemically modified cellulose (DTD) adsorbent bearing pendent methyl benzalaniline chelating group was synthesized. This new adsorbent was used for the removal of Cu 2+ and Pb 2+ heavy metal ions from aqueous solution. The chemical and structural characteristics of the adsorbent were determined using FT-IR, 13 C CP-MAS NMR, SEM, EDX and TGA analysis. The adsorption parameters, such as pH, adsorbent dose, contact time, initial metal ion concentration and temperature were optimized. Adsorption kinetic parameters were fitted into pseudo-first-order and pseudo-second-order models. The kinetic data fitted well to the pseudo-second-order kinetic model. The adsorption isotherms such as Freundlich and Langmuir isotherms have been investigated. Thermodynamic parameters have also been evaluated. The negative values of ∆ 0 G and ∆ 0 H reveal that the adsorption system is spontaneous and exothermic in nature. The modified cellulose was challenged with microorganisms as a function of contact time. The biocidal results showed that the chemically modified cellulose has bactericidal effect against the bacterial species.

Cellulose‐based Materials for the Removal of Heavy Metals from Wastewater – An Overview

“…Similarly, Kumari et al etherified, oxidized, and modified cellulose to a Schiff base using lysine to detect and adsorb mercury ions form water. Saravanan et al also chemically modified cellulose to form a novel adsorbent bearing a chelating group, i.e., methyl benzalaniline, for removal Cu 2+ and Pb 2+ ions from aqueous solutions.…”

Synthesis of poly(hydroxamic acid) ligand from polymer grafted corn-cob cellulose for transition metals extraction

“…Our synthesized ligand from corn‐cob cellulose exhibited greater adsorption ability corresponding to other cellulose‐based adsorbents. Table represents a comparison of adsorption capacities of similar adsorbent materials …”

“…Another amidoxime containing adsorbent was reported with adsorption capacity of 146.05, 133.86, and 236.2 mg g ‐1 for Cu 2+ , Ni 2+ , and Pb 2+ ions, respectively. Saravanan et al . modified cellulose with azomethine having pendent methyl formylimino groups that showed adsorption capacity of 157.3 and 153.5 mg g −1 for Cu 2+ and Pb 2+ ions, correspondingly.…”

A study on the removal of Mercury (II) ions from aqueous solution by chemically modified cellulose green adsorbent: Kinetic and equilibrium studies

“…Adsorption kinetics gives a valuable information about the controlling mechanism of the adsorption process. To fix the rate of reaction for the adsorbate uptake, which is required to select the optimum operating conditions for the batch process, with adsorption kinetics studies the kinetic models such as pseudo first order 16 , Pseudo second order 17 , Elovich 15 and intra particle diffusion models 18 were used for the experimental data.…”

“…Recently our group has reported chemically modified cellulose bearing methyl benzalaniline chelating group for the effective removal of Cu 2+, Pb 2+ ions from aqueous solutions. 15 The prime objective of the present work was to synthesize chemically modified cellulose bearing N,N-dimethyl benzalaniline chelating group and examine its efficiency towards adsorption of Hg 2+ ions. The electron donating methyl groups bonded to N increases the basicity and hence form an effective chelating site for the Hg 2+ ions.…”