Clarification of apple juice using activated sepiolite as a new fining clay. (December 2017)

• Record Type: Journal Article
• Authors: Mirzaaghaei, Marzieh; Goli, Sayed Amir Hossein; Fathi, Milad
• Is Part Of: Clay minerals. Volume 52:Number 4(2017)
• Page Start: 497
• Page End: 508
• Publication Date: 2017-12
• Subjects: activated clays, -- bentonite, -- gelatin, -- kinetic study, -- optimization, -- silica gel, -- total phenolic content; Clay minerals -- Periodicals; Clay -- Periodicals; 549.6
• DOI: 10.1180/claymin.2017.052.4.07
• Languages: English
• ISSNs: 0009-8558

Abstract

Abstract: The function of acid-activated sepiolite clay was evaluated for use in the clarification of apple juice. Optimizing the clarification process was done using response surface methodology (RSM) considering juice turbidity as a response. The efficiency of sepiolite in terms of clarification was compared to that of bentonite and a combination of these fining agents with gelatin and silica gel at optimal conditions. The conditions of 0.05% clay concentration at a temperature of 50°C for 7 h were deemed optimal in terms of juice clarification. The present results showed that treatment of sepiolitegelatin-silica gel was the most active fining agent with 99.7% reduction in apple-juice turbidity. The rate of turbidity, the viscosity, the total phenolic contents and the colour changes were fitted to first-, zero-, first- and zero-order kinetic models, respectively.