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Preparation, Characterization of a Novel Chelating Resin Functionalized with o ‐Hydroxybenzamide and Its Application for Preconcentration of Trace Metal Ions
Author(s) -
Islam Aminul,
Ahmad Akil,
Laskar Mohammad Asaduddin
Publication year - 2012
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201000439
Subject(s) - amberlite , chemistry , detection limit , metal ions in aqueous solution , sorption , nuclear chemistry , chelating resin , metal , chelation , atomic absorption spectroscopy , ion , zinc , analytical chemistry (journal) , inorganic chemistry , chromatography , adsorption , physics , organic chemistry , quantum mechanics
A stable extractor of metal ions was synthesized through azo linking of o ‐hydroxybenzamide (HBAM) with Amberlite XAD‐4 (AXAD‐4) and was characterized by elemental analyses, IR spectral, and thermal studies. Its water regain value and hydrogen ion capacity were found to be 12.93 and 7.68 mmol g −1 , respectively. The optimum pH range (with the half‐loading time [min], t 1/2 ) for Cu(II), Cr(III), Ni(II), Co(II), Zn(II), and Pb(II) ions were 2.0–4.0 (5.5), 2.0–4.0 (7.0), 2.0–4.0 (8.0), 4.0–6.0 (9.0), 4.0–6.0 (12.0), and 2.0–4.0 (15.0), respectively. Comparison of breakthrough and overall capacities of the metals ascertains the high degree of column utilization (>70%). The overall sorption capacities for Cu(II), Cr(III), Ni(II), Co(II), Zn(II), and Pb(II) ions were found to be 0.29, 0.22, 0.20, 0.16, 0.13, and 0.11 mmol g −1 with the corresponding preconcentration factor of 400, 380, 380, 360, 320, and 320, respectively. The limit of preconcentration was in the range of 5.0–6.3 ng mL −1 . The detection limit for Cu(II), Cr(III), Ni(II), Co(II), Zn(II), and Pb(II) were found to be 0.39, 0.49, 0.42, 0.59, 0.71, and 1.10 ng mL −1 , respectively. The AXAD‐4‐HBAM has been successfully applied for the analysis of natural water, multivitamin formulation, infant milk substitute, hydrogenated oil, urine, and fish.