STUDIES ON DECOLORIZATION OF ORANGE PEEL PECTIN BY USING CORNCOB ACTIVATED CARBON (CAC), KINETICS...

Phosphoric acid activation and microwave irradiation were used to make activated carbon from corncobs. As adsorbents for the decolorization of orange peel pectin, corncob activated carbon (CAC) is a new functional adsorbent with exceptional adsorption characteristics. Using response surface technology, a microwave-assisted approach for decolorizing orange peel pectin was studied (RSM). Under ideal decolorization settings (i.e., pectin temperature of 40°C, pH value of 2, microwave time of 60 s, CAC dose of 0.4 g), the decolorization rate might reach 70.23 percent. Langmuir and Freundlich models were used to examine the equilibrium adsorption data of pectin pigments from orange peel. The pseudo-first-order, pseudo-second-order, and intra-particle diffusion kinetics equations were used to simulate the adsorption data. The adsorption kinetics were demonstrated to be best described by a pseudo-second-order kinetic equation. The exothermic nature of the adsorption process was shown by thermodynamic analysis, indicating that the adsorption of orange peel pectin by CAC is a sort of spontaneous physical adsorption.

Please see the link :- https://www.ikprress.org/index.php/JACSI/article/view/3623