title: Preconcentration and determination of trace metal ions from aqueous samples by newly developed gallic acid modified Amberlite XAD-16 chelating resin.
abstract: Gallic acid was immobilized on Amberlite XAD-16 by coupling it through -N=N group. The resulting chelating resin Amberlite XAD-16 gallic acid, characterized by thermogravimetric analysis (TGA), infrared (IR) spectra and BET analysis, was used to preconcentrate Cr(III), Mn(II),Fe(III),Co(II), Ni(II) and Cu(II)ions. The resin was employed for the preconcentration of the metal ions present in river water and industrial area aqueous samples. Several parameters like effect of pH, effect of time, effect of sample volume and flow rate of sample were investigated. The sorption capacities for the resin were 216 micromol g(-1), 180 micromol g(-1), 403 micromol g(-1), 281 micromol g(-1), 250 micromol g(-1) and 344 micromol g(-1) for Cr(III), Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) respectively. The preconcentration factors for Cr(III), Mn(II), Fe(III), Ni(II), Co(II) and Cu(II) were found out to be 300, 200, 400, 285.7, 300 and 400 respectively. The effect of various interfering ions was also studied. Results were validated by using standard addition method for river water sample.
authors.affiliation: Green Chemistry Network Centre, Department of Chemistry, University of Delhi, Delhi 110007, India. rksharmagreenchem@hotmail.com
authors.forename: R K
authors.initials: RK
authors.lastname: Sharma
authors.forename: Parul
authors.initials: P
authors.lastname: Pant
mesh_terms: D000327:Adsorption; D002614:Chelating Agents / Q000737:chemistry*; D005707:Gallic Acid / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007475:Ion Exchange Resins / Q000737:chemistry*; D007477:Ions; D008670:Metals / Q000032:analysis* / Q000737:chemistry*; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry; D012996:Solutions
chemical_list: D002614:Chelating Agents; D007475:Ion Exchange Resins; D007477:Ions; D008670:Metals; D011108:Polymers; D012996:Solutions; C074337:Amberlite XAD-16; D005707:Gallic Acid