Recycling 2018, 3(2), 15; https://doi.org/10.3390/recycling3020015
A Green Extraction Process to Recover Polyphenols from Byproducts of Hemp Oil Processing
Ioannis Mourtzinos 1
, Nikolaos Menexis 1, Dimitrios Iakovidis 1, Dimitris P. Makris 2 and Athanasia Goula 1,*
, Nikolaos Menexis 1, Dimitrios Iakovidis 1, Dimitris P. Makris 2 and Athanasia Goula 1,*
1
Faculty of Agriculture, Forestry & Natural Environment, Aristotle University of Thessaloniki, P.O. Box 235, 54124 Thessaloniki, Greece
2
Green Processes & Biorefinery Group, School of Agricultural Technology, Food Technology & Nutrition, University of Applied Sciences of Thessaly, Karditsa - 43100, Greece
*
Author to whom correspondence should be addressed.
Received: 28 March 2018 / Revised: 18 April 2018 / Accepted: 19 April 2018 / Published: 22 April 2018
(This article belongs to the Special Issue Food Waste – Strategies to Reuse and Prevention)
Abstract
The valorization of solid waste hemp (Cannabis sativa L.) by a non-conventional method is presented in this article. Hemp polyphenols were extracted using aqueous solutions of 2-hydroxypropyl-β-cyclodextrin as an eco-friendly extraction solvent. Cyclodextrins (CD’s) are known to enhance the extraction of polyphenols in water by forming water soluble inclusion complexes. The process was optimized by implementing a response surface methodology (RSM) that took into consideration the following independent variables: CD concentration (CCD), solid-to-liquid ratio (S/L), and temperature (T). The assessment of the extraction model was based on two responses: the total polyphenol yield (YTP) and the antiradical activity (AAR). The optimum operating conditions were found to be: CD concentration, 32.1% (w/v); solid/solvent ratio, 1/15.2 g/mL; and extraction temperature, 28 °C. Different kinetic models were employed to fit with experimental data and the Peleg’s model was successfully developed for describing the mechanism of extraction under different processing parameters. View Full-Text
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Mourtzinos, I.; Menexis, N.; Iakovidis, D.; Makris, D.P.; Goula, A. A Green Extraction Process to Recover Polyphenols from Byproducts of Hemp Oil Processing. Recycling 2018, 3, 15.
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