From volatiles to solid wastes: Towards the full valorization of lavender and rosemary by simultaneous in situ microwaves and ultrasounds irradiation extraction
Year: 2023
Authors: Gonzalez-Rivera J.; Campanella B.; Pulidori E.; Bramanti E.; Tine M.R.; Bernazzani L.; Onor M.; Barberi P.; Duce C.; Ferrari C.
Autors Affiliation: CNR, INO, UOS Pisa, Natl Inst Opt, Via G Moruzzi 1, I-56124 Pisa, Italy; Inst Chem Organometall Cpds ICCOM CNR Pisa, Via G Moruzzi 1, I-56124 Pisa, Italy; Univ Pisa, Dept Chem & Ind Chem, Via G Moruzzi 13, I-56124 Pisa, Italy; Scuola Super Sant Anna, Ctr Plant Sci, Grp Agroecol, Piazza Martiri della Liberta 33, I-56127 Pisa, Italy.
Abstract: Novel green extractions aim at the full valorization of aromatic herbs along with the minimization of energy consumption, extraction time and cost of the processes. In this perspective, a simultaneous ultrasound and microwave irradiation extraction method (US-IMWAE) for the full valorization of aromatic herbs is here presented. This green approach has been applied to the isolation of essential oils (EOs), hydrosols and solid residues from lavender and rosemary plants. The yields of US-IMWAE in terms of EO weight percentage (wt%), polyphenols concentration and thermochemical characteristics of the solid residues have been compared with microwave assisted extraction (IMWAE) and hydrodistillation (HD). The composition profiles of EOs and hydrosols have been analyzed and quantified by head space gas chromatography mass spectrometry (HS-GC-MS), liquid chromatography with UV/visible diode array/fluorescence detector (HPLC-DAD-FD) and the Folin-Ciocalteu test for the total phenolic content (TPC). Solid residues as valuable by-products have been investigated by FTIR spectroscopy in tandem with chemometrics, thermogravimetric analysis (TGA) and combustion calorimetry. We found that the US-IMWAE green extraction method has produced higher yields of EOs with appealing composition profiles for cosmetic, fragrance and perfume industries (lavender), and for pharmacology and medical applications (rosemary). The high concentration of rosmarinic acid and the total phenolic content in hydrosols obtained with the US-IMWAE method, highlights its great potential. Chemometric analysis of solid residues has found that cellulose is the main component followed by hemicellulose and lignin. The experimental values of enthalpy of combustion of the solid residues (?cH) match with the corresponding calculated values and confirm their energetic features and their potential uses as alternative biomass for fuel production. US-IMWAE is environmentally friendly, highly flexible, controllable, and it enables to break the scale-up barrier in ultrasounds and microwave assisted industrial processes. Thus, US-IMWAE has a great potential to reduce EO production costs, and to increase local farm income through the full exploitation of aromatic herbs.
Journal/Review: INDUSTRIAL CROPS AND PRODUCTS
Volume: 194 Pages from: 116362-1 to: 116362-10
More Information: This research is supported by the Project INSOLE-Innovazioni agronomiche e tecnologiche per la coltivazione sostenibile di piante officinali e la produzione di oli essenziali di qualita”nellŽambito del PSR Sicilia 2014-2020. Sottomisura 16.1. Sostegno per la costituzione e la gestione di gruppi operativi del PEI in materia di produttivita e sostenibilita dellŽagricoltura. The authors would like to thank C. Lanza, A. Barbini and F. Pardini (INO-CNR) for their valuable technical support.KeyWords: Aromatic herbs; biomass; Essential oil; Polyphenols; Solid residuesDOI: 10.1016/j.indcrop.2023.116362Citations: 6data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here