Adsorption of Methyl Anthranilate from Aqueous Solution onto Adsorption Resins Modified by Heterocyclic Compounds

Abstract

In this study, the adsorption performances of PRLMR and IDLMR for methyl anthranilate from aqueous solution were studied by adsorption thermodynamics and adsorption kinetics. The effect of methanol addition on the adsorption was also investigated. The results indicated that the modified resins possessed good adsorption capacities for methyl anthranilate, while IDLMR possessed much larger adsorption capacity for the adsorbate. The equilibrium data were correlated by both Langmuir and Freundlich models. The adsorption capacity decreased as 1% methanol added into the methyl anthranilate solution. The kinetic experiments showed that the adsorption process was in accordance with the pseudo-first-order rate equation, and the value of pseudo-first-order rate constant k at 303K was larger than that at 288K, which suggested that the IDLMR possessed much faster adsorption rate for methyl anthranilate from aqueous solution at 303K.