| Abstrakt: |
Currently, people are intensively looking for natural sweeteners that are safe for consumption by diabetics. One of natural sweeteners that are low in calories and not carcinogenic is sweetener found in stevia leaves. A suitable method for obtaining stevia sweetener from stevia leaves is extraaction. Unfortunately, the extracted solution obtained usually has black-brown color due to the presence of tannin compounds in stevia leaves. The removal of tannin compounds in stevia solution can be conducted by adsorption using a selective adsorbent. The present work studied the removal of tannin compounds from stevia solution by adsorption using synthetic zeolite. The adsorption was carried out at a ratio of adsorbent-solution of 1:10 (w/v), synthetic zeolite size of 40 mesh, temperature variants of 40, 50, 60°C, and stirring speed variants of 100, 180, 200 rpm. The tannin level in the sample was analyzed with UV-Vis spectrophotometer at a wavelength of 760 nm. The results showed that the highest decrease in tannin levels occurred at a temperature of 40°C, stirring speed of 200 rpm, which was 42.8%. The adsorption of tannins from stevia extract solution on synthetic zeolites followed the Freundlich adsorption equilibrium model,i.e (x/m) = 0,327C1/ 2,226 [ABSTRACT FROM AUTHOR] |
