SINTESIS ADSORBEN HIBRIDA KALIKSARENA TURUNAN RESORSINOL-KITOSAN DAN UJI ADSORPSINYA TERHADAP KATION Pb(II); SYNTHESIS OF RESORCINOL DERIVED CALIXARENE-CHITOSAN HYBRID ADSORBENT AND ITS ADSORPTION ASSAY TOWARD Pb(II) CATION

Santoso, Prio, Chairil Anwar

2015 | Disertasi | FMIPA

Synthesis and adsorption assay of resorcinol derived calixarene-chitosan hybrid toward Pb(II) cation has been conducted. The hybrid was expected to be one of the alternative adsorbent for industrial waste treatment that contain of Pb from low cost synthesis process. This research was started by synthesis and characterization of resorcinol derived calixarene-chitosan hybrid. The synthesis was carried out from vanillin via allylation, aromatic electrophilic substitution-cyclization, chloromethylation and unimolecular nucleophilic substitution reactions. Structure elucidation of products was performed using IR, 1H-NMR, 13C-NMR and GC-MS spectrometers. The adsorption assay of result hybrid toward Pb(II) was carried out using batch method in variaous of pH, contact time and Pb(II) cation concentration. The product of hybrid was obtained as dark red solid in 78.08% yield. The adsorption assay of hybrid toward Pb(II) showed optimum adsorption at pH 5 and contact time was 2 hours. Adsorption of hybrid toward Pb(II) followed the adsorption kinetics model with a pseudo second order adsorption and the rate constant (k) was 6.86 x 10-2 g mg-1 min-1. The result of adsorption equilibrium study showed that the adsorbent hybrid followed the Freundlich isotherm model. The adsorption capacity (Xm) of hybrid better than constituent calixarene and chitosan. Adsorption capacity for three adsorbent were 17.99; 10.14 and 10.31 mg g-1, respectively. The interaction of hybrid adsorbent with Pb(II) cation could be classified as chemisorptions.

Kata Kunci : hybrid; calixarene; resorcinol; chitosan; adsorben