Comparison of simple and chelated amberlite IR-120 for preconcentration and Determination of Cu(II) from aqueous samples

Abstract

ABSTRACT. In the present study, the efficiency of simple and chelating Amberlite IR-120 with α-nitroso β-naphthol (IR-αNβN) and with 8-hydroxy quinoline (IR-8HQ) has been compared for the removal of Cu(II) from aqueous solutions. The chelation was confirmed using different characterization techniques like SEM, TGA and FTIR. A number of experiments were carried out in batch system to determine the effect of different parameters on adsorption of Cu(II) like pH, contact time and sample volume. The results showed occurrence of maximum adsorption at pH 7 in 10 min with adsorption capacity of 71.5 mg g -1 at 298 K. The adsorption followed pseudo second order kinetic model among the four kinetic models applied. Maximum desorption from IR-8HQ was obtained with a mixture of 4.0 M HCl and 0.5 M HNO3. Furthermore, IR-8HQ was found to be most selective adsorbent among three adsorbents investigated. The developed preconcentration procedure was successfully applied to spiked tap water and real samples.

A microporous metal–organic framework with open metal sites for selective sensing Fe3+, CrO42- and nitrobenzene

“…Moreover, 1 has five potential sensing sites and its sensing properties were not explored at all. Our group has also reported several interesting solventinduced MOFs in recent works [15][16][17][18][19], and the results indicate that sensing feature are mainly controlled by solvent size and polarity, however, the mechanisms of solvent effects are still largely unexplored. Consequently, much research work in this area remains to be done [20].…”