A pioneering study on the recovery of valuable functional compounds from olive pomace by using supercritical carbon dioxide extraction: Comparison of perlite addition and drying

Argun, Mehmet Emin; Arslan, Fatma Nur; Ateş, Havva; Yel, Esra; Cakmakcı, Ozgur; Dağ, Bi̇rol

doi:10.1016/j.seppur.2022.122593

Cited by 9 publications

(4 citation statements)

References 65 publications

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“…The citrus peels used in the experiments were dried in an oven at 75 °C for 12 hours. Argun et al (2023) found that the decomposition of phenolics was not significantly affected at 70 °C unless exposed to sunlight. The dried samples were ground into powder in the GRT-10BL laboratory grinding mill (Akyol, Türkiye).…”

Section: Preparation Of the Samplesmentioning

confidence: 94%

Comparison of Different Extraction Methods on the Recovery Efficiencies of Valuable Components from Orange Peels

Argun,

Öztürk,

Argun

2023

Turkish JAF Sci.Tech.

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Supercritical-CO2 extraction, Soxhlet extraction, and ultrasound-assisted extraction methods were conducted in this study to recover valuable components, specifically phenolic antioxidant compounds, from orange peels. Basic operating parameters such as temperature and pressure, which affect the extraction efficiency of phenolic substances in orange peel with supercritical-CO2, were designed using the central composite design methodology. In the Soxhlet and ultrasound-assisted extraction methods, 2-hour extraction processes were carried out using ethanol at different concentrations (50%, 80% and 100%) as a solvent. Yield comparison was made by performing total phenolic content, antioxidant activity and total flavonoid content analyses in the extracts. The total phenolic content (TPC) in the extracts was determined to be 5034 mg GAE/L for supercritical-CO2 extraction at 61.5°C and 20 MPa. In comparison, Soxhlet extraction yielded a TPC of 1728 mg GAE/L, while the ultrasound-assisted extraction method resulted in a TPC of 4056 mg GAE/L. It was determined that the optimum operating parameters of supercritical-CO2 extraction were 60°C and 26.4 MPa in case all the responses were maximized. The best phenolic recovery was obtained at 100% ethanol in Soxhlet extraction and 80% ethanol in ultrasound-assisted extraction. Although supercritical-CO2 extraction is an environmentally friendly application, the recovery rate of valuable components from raw materials is lower than in Soxhlet extraction and ultrasound-assisted extraction. However, since the volume of the extracts obtained from the supercritical-CO2 extraction is small, the ratio of phenolic compounds is higher.

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Section: Preparation Of the Samplesmentioning

confidence: 94%

Comparison of Different Extraction Methods on the Recovery Efficiencies of Valuable Components from Orange Peels

Argun,

Öztürk,

Argun

2023

Turkish JAF Sci.Tech.

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“…The peak numbers 6-8 present several similarities with oleuropein and oleuropein derivatives, such as dihydro-oleuropein and oleuropein aglycone. These compounds were detected in several olive fruit by-products [54][55][56], since they are a degrading form of olive fruits' secoiridoids, i.e., oleuropein and dimethyloleuropein, which occur during crushing/malaxation, thus forming several secoiridoid aglycone derivatives [25,57]. Moreover, fruit flavonoids such as luteolin-7-O-glucoside and rutin, as well as cinnamic acid esters such as verbascoside and comselogoside, have been reported in fruit derivatives (paste, pomace, and wastewater) [25], indicating their preferred transfer to waste without many alterations.…”

Section: Identification Of Phenolic Compoundsmentioning

confidence: 99%

The Recovery of Bioactive Compounds from Olive Pomace Using Green Extraction Processes

et al. 2023

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In this study, solid olive mill waste (SOMW) was used to obtain antioxidant compounds using solid–liquid extraction. The effect of different extraction methods, namely microwave-assisted extraction (MAE), ultrasound-assisted extraction (UAE), Soxhlet, and conventional solvent extraction, on the yield, total phenolics, and total antioxidant activity of SOMW extracts was investigated. Untreated and dried SOMW were subjected to extraction with water and methanol. The antioxidant activity of the extracts was evaluated using the DPPH assay, while their total phenolic content was measured using the Folin–Ciocalteu method. For the characterisation of the extracts, HPLC-DAD analysis was performed. The results showed that the extraction yield was significantly influenced (p < 0.05) by the solvent used, the material treatment prior to extraction, the moisture content of SOMW samples, and the extraction time. The optimised parameters were water, as the extraction solvent, and MAE as the extraction technique (extraction temperature of 50 °C and time of 1 h). The evaluation of the antioxidant activity of the extracts indicated that phenolics were the dominant bioactive compounds. The extracts were found to be rich in several hydroxytyrosol derivatives. Therefore, SOMW can be a valuable resource for bioactive compounds using conventional and innovative extraction techniques.

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“…It can be said that the increase in polarity and density of CO 2 at high pressure increases the solubility of some phenolic compounds [14]. Flavonoids are expected to be more soluble in SC-CO 2 than other phenolics because of their high molecular weight and relatively low polarity [15][16][17].…”

Section: The Change Of Valuable Contentmentioning

confidence: 99%

Investigation of conversion of sunflower oil production wastes to high value compounds by supercritical CO2

KILIÇARSLAN

Argun

2023

Environmental Research and Technology

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The evaluation of wastes from edible oil production industry has increasing importance because of resources deficiency and growing population day by day. It was aimed to investigate the recovery potential of oil and valuable components such as total phenolic contents (TPC), total flavonoid content (TFC) and antioxidant activities with conventional and green extraction methods from edible sunflower oil production wastes. Firstly, Soxhlet extraction was applied on the waste samples from filtration of the oil and then supercritical CO2 (SC- CO2) extraction was performed to compare extraction yield. The statistical evaluation of the SC- CO2 extraction experiments was conducted with the Minitab Software program. It was concluded that 37% extraction yield was obtained with the mixture of perlite and waste sample, while the highest recovery was observed as 27% for the perlite-free sample. The interaction of independent variables (temperature and pressure) on the recovery yields were determined as significant (p=0.002). Pressure was detected more effective on the valuable substance contents of the extracts than temperature. The most efficient conditions were 50 oC and 22.1 MPa for oil recovery, while 60 oC and 20 MPa for valuable substance recovery.

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A pioneering study on the recovery of valuable functional compounds from olive pomace by using supercritical carbon dioxide extraction: Comparison of perlite addition and drying

Cited by 9 publications

References 65 publications

Comparison of Different Extraction Methods on the Recovery Efficiencies of Valuable Components from Orange Peels

Comparison of Different Extraction Methods on the Recovery Efficiencies of Valuable Components from Orange Peels

The Recovery of Bioactive Compounds from Olive Pomace Using Green Extraction Processes

Investigation of conversion of sunflower oil production wastes to high value compounds by supercritical CO2

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