title: New heterocycle modified chitosan adsorbent for metal ions (II) removal from aqueous systems.
abstract: A new hydrogel based on a modified chitosan CS-B was synthesized and evaluated for its metal ion removal from aqueous systems. The CS-B hydrogel was prepared through modification of chitosan with 4-((1, 3-dioxoisoindolin-2-ylimino) methyl) benzaldehyde as a heterocyclic component. The new hydrogel was analyzed by diverse techniques such as FTIR, XRD, TGA, SEM, and swelling tests. The adsorption capacity of CS-B for metal ions Co(2+), Hg(2+), Cu(2+), Zn(2+), and Pb(2+) from aqueous systems at different pH values showed various levels of efficiency. The metal ion uptake data over a range of pH values for Co(2+) and Hg(2+) showed the highest adsorption capacity while Cu(2+), Zn(2+), and Pb(2+) showed moderate adsorption capacity. Selective metal ion efficiency was highest for Co(2+) and lowest for Hg(2+) in their binary mixture.
authors.affiliation: Chemistry Department, Faculty of Women, Ain Shams University, Heliopolis, 11757, Cairo, Egypt. Electronic address: nadiaghk@yahoo.com.
authors.forename: Nadia G
authors.initials: NG
authors.lastname: Kandile
authors.affiliation: Chemistry Department, Faculty of Women, Ain Shams University, Heliopolis, 11757, Cairo, Egypt.
authors.forename: Hemat M
authors.initials: HM
authors.lastname: Mohamed
authors.affiliation: Chemistry Department, Faculty of Women, Ain Shams University, Heliopolis, 11757, Cairo, Egypt.
authors.forename: Mansoura I
authors.initials: MI
authors.lastname: Mohamed
mesh_terms: D019342:Acetic Acid / Q000737:chemistry; D000327:Adsorption; D048271:Chitosan / Q000138:chemical synthesis / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D020100:Hydrogels / Q000138:chemical synthesis / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007477:Ions; D013058:Mass Spectrometry; D008670:Metals / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D006571:Heterocyclic Compounds; D020100:Hydrogels; D007477:Ions; D008670:Metals; D012997:Solvents; D014874:Water Pollutants, Chemical; D048271:Chitosan; D019342:Acetic Acid
keywords: Heterocycle; Hydrogel; Metal uptake; Modified chitosan; Swelling