High Voltage Electric Discharge for Recovery of Chlorogenic Acid from Tobacco Waste

Abstract

Three fractions of tobacco waste (scrap, dust and midrib) were subjected to a high voltage electric discharge (HVED) assisted extraction procedure under different experimental conditions: solvent:solid ratio (300, 500, 700 mL/g), frequency (40, 70, 100 Hz) and treatment time (15, 30, 45 min), in order to study the influence of these conditions on the content of chlorogenic acid. The content of chlorogenic acid ranged from 1.54 to 3.66 mg/100 g for scrap, from 1.90 to 2.97 mg/100 g for dust, and from 2.30 to 3.38 mg/100 g for midrib extract, showing a strong dependence on the applied process parameters. The temperature change and the change in pH and electrical conductivity of the extracts after high voltage discharge treatment were also observed. The studied process parameters showed a statistically significant effect on the chemical and physical properties of the extracts from tobacco waste as well as on the content of chlorogenic acid, indicating the potential of HVED assisted processes in the separation of chlorogenic acid from tobacco industry waste. Multiple regression analysis was used to fit the results for the chlorogenic acid to a second order polynomial equation and the optimum conditions were determined.

Recent advances in combined Avant-garde technologies (thermal-thermal, non-thermal-non-thermal, and thermal-non-thermal matrix) to extract polyphenols from agro byproducts

“…They also demonstrated that, in contrast to UAE, HVED, and CE, the PEF preferentially extracted and improved the extraction of ellagic acid (740 mg/kg), while HVED (345 mg/kg) increased gallic acid extraction. Comparable findings have been reported for tobacco waste [ 180 ], mandarin peel [ 181 ], Gac leaves [ 182 ], and orange pomace [ 183 ].…”

The Biological Activity Mechanism of Chlorogenic Acid and Its Applications in Food Industry: A Review

“…CGA is a natural plant extract with a vast array of sources, present in honeysuckle ( 3 ), potato ( 4 ), cork ( 5 ), eucommia leaves ( 6 ), chrysanthemum ( 7 ), strawberry ( 8 ), mango ( 9 ), blueberries ( 10 ), mulberry leaves ( 11 ), and green coffee ( 12 ). Recently, some researchers have used high voltage discharge to assist in extracting a certain amount of CGA from the three components of tobacco waste (waste, dust, and midrib) ( 13 ). In vitro and in vivo studies have shown that the primary biological activities of the chlorogenic acid are anti-oxidant, liver and kidney protection, anti-bacterial, anti-tumor, regulation of sugar metabolism and lipid metabolism, anti-inflammatory, and protection of the nervous system.…”

Poboljšana ekstrakcija fenolnih spojeva iz kore mandarine primjenom visokonaponskog električnog pražnjenja: Utjecaj procesnih parametara i optimizacija

“…13 S ciljem poboljšanja ekstrakcije polifenolnih spojeva iz kore mandarine sorte Okitsu provedena je HVED ekstrakcija tijekom koje se ispitivao utjecaj promjene parametara, i to omjera kapljevito/kruto (od 200 do 400 ml g −1 ), frekvencije (od 40 do 100 Hz) i vremena ekstrakcije (od 5 do 15 min), na iskorištenje procesa ekstrakcije HVED i na sadržaj polifenolnih spojeva, dok su ostali parametri (otapalo, udaljenost između elektroda) bili konstantni. Eksperimentalni raspon ispitivanih parametara za frekvenciju i vrijeme odabran je pomoću literaturno dostupnih podataka, [25][26][27][28][29] dok je omjer kapljevito/kruto odabran na temelju preliminarnih istraživanja. Naime, omjer kapljevito/kruto od 200 ml g −1 bila najveća koncentracija pri kojoj je još uvijek dolazilo do stvaranja izboja.…”

“…Naime, električna pražnjenja odvijaju se pri vrlo niskoj vodljivosti medija, što bi značilo da je pri višim omjerima kapljevito/kruto, odnosno nižim koncentracijama suspenzije bilo više pražnjenja. 27 S pove- ćanim električnim pražnjenjem u mediju došlo je do većeg narušavanja staničnih stijenki biljnih stanica i efikasnijeg procesa ekstrakcije hesperidina. Ipak, taj procesni parametar je potrebno optimizirati jer njegovo povećanje dovodi do prevelike uporabe otapala (vode), što nije poželjno, kako s energetske tako i s ekološke strane.…”