Recovery of naringin from kinnow (Citrus reticulata Blanco) peels by adsorption–desorption technique using an indigenous resin

Abstract

A process technology has been developed for recovery of naringin from kinnow (citrus) peels, which is a waste. The kinnow peels were boiled with water to extract naringin into water. It was adsorbed on an indigenous macroporous resin, Indion PA-500. Naringin was recovered from the saturated resin by desorption with ethanol as a solvent. The equilibrium and kinetic studies for both adsorption and desorption are presented. The Langmuir isotherm described the adsorption equilibrium data. However, desorption data were best described by the Toth isotherm. Adsorption and desorption kinetic data were found to follow a pseudo-second-order rate equation and second-order rate equation, respectively. Recovery of naringin was about 49% w/w (based on naringin present in peel-boiled extract). The purity of final products was 91–94% w/w. © 2017, Indian Academy of Sciences.