Synthesis, characterization and determination of the metal ions adsorption capacity of cellulose modified with p-aminobenzoic groups

Abstract

This paper describes the synthesis and characterization of p-aminobenzoic modified cellulose (Cell-PAB), as well as the separation and preconcentration of Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II) ions from an aqueous medium using a Cell-PAB bath and the column technique. The quantity of p-aminobenzoic groups attached to the cellulose surface, i.e., 1.81±0.04 mmol/g, was determined by elemental analysis. The FT-IR spectra of Cell-PAB revealed characteristic bands of paminobenzoic groups, indicating the desired functionalization of the cellulose surface. The adsorptive capacities for the metals (Ns) Cd, Cu, Ni, Pb and Zn (Ns) were, respectively, 1.72 ± 0.02, 1.96 ± 0.02, 1.88 ± 0.04, 2.01 ± 0.03 and 1.93 ± 0.03 mmol/g. Metal separations performed in flow experiments using a column packed with 1 g of Cell-PAB and 5 mL of 1.5 mol/L HCl solution as eluent achieved an almost 100% metal ions recovery rate.

Template Synthesis of Iminodiacetic Acid Polysiloxane Immobilized Ligand Systems and their Metal Uptake Capacity

“…Many technological methods have been developed over the years for removing toxic/heavy metal contaminants from different media [3,4]. Chemical precipitation, ion exchange, filtration, adsorption, electrodeposition and membrane systems are the most important methods [5,6].…”

Extraction and preconcentration capacity of bifunctionalized diamine-thiol polysiloxane immobilized ligand system towards some divalent cations

“…Many technological methods have been developed for some time for removing toxic/heavy metal contaminants from different media [6][7]. Chemical precipitation, ion exchange, filtration, adsorption, electrodeposition and membrane systems are the most important methods [8][9][10][11].…”

Synthesis, Characterization of Cellulose Modified with 2-Mercaptobenzothiazole and Its Adsorption To Cu(II) Ion in Aqueous Solution

“…Modification of cellulose surface can be done by covalent grafting through immobilization silane reagent. The active functional group of hydroxyl in C 5 from primary alcohol (-CH 2 OH) at cellulose monomer have an ability to react with organic ligand [12]. The hydroxyl group from -CH 2 OH can be reacted with organosilil group of 3-chloropropyltrimetoxysilane to form cellulose-3-chloropropyldimethoxysilane.…”

“…A little information was obtained which organic compounds as modified agent of organic material through grafting and impregnating methods. Modified organic material can be used for adsorption and preconcentration purpose of heavy metal ion [7,[10][11][12][13][14].…”