Adsorption Characteristics of Pb(II) and Cr(III) onto C‐4‐Methoxyphenylcalix[4]Resorcinarene in Batch and Fixed Bed Column Systems

Abstract

A study on the adsorption characteristics of Pb(II) and Cr(III) cations onto C‐4‐methoxyphenylcalix‐[4]resorcinarene (CMPCR) in batch and fixed bed column systems has been conducted. CMPCR was produced by one step synthesis from resorcinol, 4‐methoxybenzaldehyde, and HCl. The synthesis was carried out at 78 °C for 24 hours and afforded the adsorbent in 85.7% as a 3:2 mixture of C4ν:C2ν isomer. Most parameters in batch and fixed bed column systems confirm that CMPCR is a good adsorbent for Pb(II) and Cr(III), though Pb(II) adsorption was more favorable than that of Cr(III). The adsorption kinetic of Pb(II) and Cr(III) adsorptions in batch and fixed bed column systems followed a pseudo 2n order kinetics model. The rate constant of Pb(II) was higher than that of Cr(III) in the batch system, but this result was contrary to the result obtained in a fixed bed column system. Desorption studies to recover the adsorbed Pb(II) and Cr(III) were performed sequentially with distilled water and HCl, and the results showed that the adsorption was dominated by chemisorption.

Synthesis, Characterization and Adsorption Study of C-4-Phenacyloxy-phenylcalix [4]resorcinarene for Pb(II), Cd(II) and Cr(III) Ions

“…The plots of the pseudo 2 nd order showed a good straight line (Figure 9) with a good R 2 value. This result was similar to the previous study of C-4-methoxyphenylcalix[4] resorcinarene (CMPCR) and C-methylcalix[4]resorcinarene (CMCR) as an adsorbent for Pb(II) and Cr(III), that also follow the Ho-MacKay pseudo 2 nd order model (Jumina et al 2011(Jumina et al , 2007. Trawneh et al (2015) also investigated the adsorption kinetics of C-4-hydroxyphenylcalix[4]resorcinarene against Cu(II), Co(II), Zn(II), Mn(II), and Pb(II) metal ions and the kinetic also follow the pseudo 2 nd order kinetic model.…”

“…A similar pattern was observed in the previous adsorption studies of CMPCR for Cr(III). In fact, the increase was almost verticle before reaching a steady value which took about 5 min (Jumina et al 2007). In the present work, the adsorption of Cd(II) reached equilibrium quite rapidly and became steady within 10 min.…”

“…The Gibbs free energies were also found to be higher than 20 kJ.mol -1 (27.99; 32.45; and 39.13 kJ.mol -1 ) indicating the adsorption involves chemisorption as an important step. The reported ΔG values for C-4-methoxyphenylcalix[4] resorcinarene (CMPCR) adsorption for Pb(II) and Cr(III) adsorption were -29.576 and -23.332 kJ.mol -1 , respectively (Jumina et al 2007). De Namor et al (2001 has synthesized calix(4)arene ketone derivatives (5,11,17,23-tetra-tert-butyl-25,26,27,28-tetra(benzoyl) methoxycalix(4)) and investigated its interaction with alkali metal.…”

“…C-4-hydroxyphenylcalix[4]resorcinarene has shown adsorption capability for Mn(II), Cu(II), Co(II), Zn(II) and Pb(II) ions (Trawneh 2015). The study of adsorption characteristics of Pb(II) and Cr(III) ions onto C-4methoxyphenylcalix[4]resorcinarene (CMPCR) in batch and fixed bed column systems has been conducted (Jumina et al 2007). In their studies, the adsorption kinetic of Pb(II) and Cr(III) adsorptions followed pseudo 2 nd order kinetics model.…”

Synthesis of Tetrakis-N,n,n-Trimethylammoniummethyl-C-3,4-Dimethoxyphenylcalix[4]resorcinarene Iodide Based Vanillin and Its Antidote Activity for Chromium(vi) Intoxication

“…The macrocyclic molecules of resorcinarenes are cyclic tetramers easily available via one-step reaction by acid-catalyzed condensation of resorcinol and various aldehydes [1][2][3][4][5]. Investigation by in vitro method, these compounds have been studied with regard to inclusion of cations [2,[6][7][8][9], anions [10][11], and organic neutral molecules [3-4,12,]. Recently, Henge-Napoli et al [13] proved that the Calix [4]arenas containing sulphonato group is an effective antidote on reducing the heavy metal concentration in vivo tests on mice.…”