The estimation of kinetic parameters of the solid-liquid extraction process of the lavender flower (Lavandula x hybrida L.)

Abstract: Stevia rebaudiana Bertoni is a perennial shrub belonging to the Asteraceae family. The leaves contain a mixture of steviol glycosides with extraordinary sweetening properties, among which the most important are stevioside and rebaudioside A. These components have a high sweetening power, which is about 300 times that of sucrose, and a negligible calorie content. However, their extraction and purification are not easy. In this paper, the extraction technique under cyclic pressure, known as rapid solid-liquid dynamic extraction (RSLDE), was compared using a Naviglio extractor (NE) with conventional maceration. The aim was to identify an efficient and economically viable method for obtaining high amounts of steviol glycosides in a short time. Furthermore, a numerical model was set up for the solid-liquid extraction process of value-added compounds from natural sources. Several parameters must be evaluated in relation to the characteristics of the parts of the plant subjected to extraction. Therefore, since diffusion and osmosis are highly dependent on temperature, it is necessary to control the temperature of the extraction system. On the other hand, the final aim of this work was to provide a scientific and quantitative basis for RSLDE. Therefore, the results obtained from stevia extracts using the corresponding mathematical model allowed hypothesizing the application of this model to the extraction processes of other vegetable matrices.

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EKSTRAKSI SILIKA DARI ABU SEKAM PADI DENGAN PELARUT KOH

Konversi ◽

10.20527/k.v2i1.125 ◽

2013 ◽

Vol 2 (1) ◽

pp. 28

Author(s):

Galang Fajar Agung M ◽

Muhammad Rizal Hanafie Sy ◽

Primata Mardina

Keyword(s):

Raw Materials ◽

Operation Time ◽

Extraction Process ◽

Liquid Extraction ◽

Waste Material ◽

Alkali Solution ◽

Rice Husks ◽

Solid Liquid Extraction ◽

The One ◽

Solid Liquid

Sekam padi sebagai limbah yang berlimpah khususnya di negara agraris, adalah salah satu sumber penghasil silika terbesar. Sekam padi mengandung sekitar 90%-98% silika setelah mengalami pembakaran sempurna. Pengambilan silika dari abu sekam padi dilakukan dengan proses ekstraksi padat cair menggunakan larutan alkali sebagai pelarut. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh konsentrasi larutan alkali dan waktu operasi terhadap yield dari silika. Proses ekstraksi dilakukan dalam skala laboratorium. Sepuluh gram abu sekam padi dimasukkan ke dalam 60 mL larutan alkali dengan konsentrasi tertentu (5%w/w, 10% w/w dan 15% w/w) untuk diekstrak kandungan silika dengan waktu operasi tertentu (30, 60 dan 90 menit). Setelah proses ekstraksi selesai, larutan tersebut ditambahkan larutan HCl 1 N untuk mengendapkan silika. Silika yang terbentuk kemudian dipisahkan dari sisa larutan dengan penyaringan. Untuk menghilangkan kelembaban pada silika yang dihasilkan, maka dilanjutkan dengan proses pengeringan. Hasil penelitian menunjukkan yield silika terbesar adalah 50,49% terjadi pada KOH 10% dan waktu ekstraksi 90 menit. Keywords: abu sekam padi, silika, KOH Rice husks, the most abundant waste material in agricultural country, is the one of the silica rich raw materials. Rice husks contain about 90%-98% of silica after completed combustion. Recovery silica from ash of rice husks was done by solid-liquid extraction using alkali solution. Different concentration of alkali solution (5% w/w, 10% w/w and 10% w/w) and different operation time (30, 60 and 90 minutes) were used to investigate their influence on yields of silica. The extraction process was carried out in laboratory scale. After extraction, process was continued by acidic solidification, filtration and drying. The result showed the biggest yield of silica was 50, 49% at 10% KOH for 90 minutes . Keywords: ash of rice husks, silica, KOH

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Kinetics of the Solid-Liquid Extraction Process of Phenolic Antioxidants and Antioxidant Capacity from Hop (Humulus lupulus L.)

Separation Science and Technology ◽

10.1080/01496395.2014.978019 ◽

2014 ◽

Vol 50 (11) ◽

pp. 1658-1664 ◽

Cited By ~ 6

Author(s):

Dušan Đ. Paunović ◽

Snežana S. Mitić ◽

Gordana S. Stojanović ◽

Milan N. Mitić ◽

Branka T. Stojanović ◽

...

Keyword(s):

Antioxidant Capacity ◽

Extraction Process ◽

Liquid Extraction ◽

Humulus Lupulus ◽

Phenolic Antioxidants ◽

Humulus Lupulus L ◽

Solid Liquid Extraction ◽

Solid Liquid ◽

Kinetics Of

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Modelling of solid-liquid extraction process of total polyphenols from soybeans

Czech Journal of Food Sciences ◽

10.17221/200/2009-cjfs ◽

2010 ◽

Vol 28 (No. 3) ◽

pp. 206-212 ◽

Cited By ~ 70

Author(s):

S. Jokić ◽

D. Velić ◽

M. Bilić ◽

A. Bucić-Kojić ◽

M. Planinić ◽

...

Keyword(s):

Mathematical Models ◽

Aqueous Ethanol ◽

Extraction Process ◽

Extraction Yield ◽

Liquid Extraction ◽

Ethanol Solution ◽

Aqueous Ethanol Solution ◽

Total Polyphenols ◽

Solid Liquid Extraction ◽

Solid Liquid

The influence of the solvent, temperature, and extraction time on the extractability of total polyphenols from milled soybeans variety Ika was investigated. The study was performed in order to select the most suitable solvent (water; 50, 60, 70, and 80% aqueous ethanol) for achieving the highest yield of total polyphenols. The most effective solvent (50% aqueous ethanol solution) was used for monitoring the kinetics and modelling of solid-liquid extraction of total polyphenols from soybeans, average particle size 0.459 mm, at solid-liquid ratio of 20 ml/g (ratio of the solvent volume per g of raw material). The total polyphenols content in the soybean extract was determined spectrophotometrically using Folin-Ciocalteu micro-methods at 765 nm. The applicability of different mathematical models (Peleg, Page, and Logarithmic models) to describe the kinetics of the solid-liquid extraction process of total polyphenols from soybeans was studied as well. The results exhibited a significant influence of the solvent and temperature on the kinetics and extraction yield of total polyphenols from soybeans. The best extraction yield of total polyphenols was obtained using 50% aqueous ethanol solution at 80°C after 120 min (4.322 mg GAE/g<sub>db</sub>). The extraction yield of total polyphenols in soybean extracts increased by increasing the extraction temperature and extending the duration of the extraction process. The mathematical models applied showed a good agreement with the experimental results, which allows their application in modelling and optimisation of solid-liquid extraction process for the extraction of total polyphenols from soybeans.

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Optimization, kinetics and thermodynamics of the solid-liquid extraction process of flavonoids from rosemary (Rosemarinus Officinalis) leaves

Studia Universitatis Babeș-Bolyai Chemia ◽

10.24193/subbchem.2020.1.09 ◽

2020 ◽

Vol 65 (1) ◽

pp. 111-124

Author(s):

Milan Mitić ◽

◽

Sonja Janković ◽

Jelena Mrmošanin ◽

Milan Stojković ◽

...

Keyword(s):

Extraction Process ◽

Liquid Extraction ◽

Kinetics And Thermodynamics ◽

Solid Liquid Extraction ◽

Solid Liquid

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Kinetics and thermodynamics of the solid-liquid extraction process of total polyphenols from barley

Savremene tehnologije ◽

10.5937/savteh1402058p ◽

2014 ◽

Vol 3 (2) ◽

pp. 58-63 ◽

Cited By ~ 2

Author(s):

Dusan Paunovic ◽

Snezana Mitic ◽

Danijela Kostic ◽

Milan Mitic ◽

Branka Stojanovic ◽

...

Keyword(s):

Extraction Process ◽

Liquid Extraction ◽

Total Polyphenols ◽

Kinetics And Thermodynamics ◽

Solid Liquid Extraction ◽

Solid Liquid

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Kinetic modelling of the solid–liquid extraction process of polyphenolic compounds from apple pomace: influence of solvent composition and temperature

Bioresources and Bioprocessing ◽

10.1186/s40643-021-00465-4 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Parinaz Hobbi ◽

Oseweuba Valentine Okoro ◽

Christine Delporte ◽

Houman Alimoradi ◽

Daria Podstawczyk ◽

...

Keyword(s):

Large Scale ◽

Kinetic Modelling ◽

Extraction Process ◽

Liquid Extraction ◽

Polyphenolic Compounds ◽

Apple Pomace ◽

Second Order ◽

Order Kinetic ◽

Solid Liquid Extraction ◽

Solid Liquid

Abstract This study aims to assess kinetic modelling of the solid–liquid extraction process of total polyphenolic compounds (TPC) from apple pomace (AP). In this regard, we investigated the effects of temperature and solvent (i.e. water, ethanol, and acetone) on TPC extraction over various periods. The highest TPC yield of 11.1 ± 0.49 mg gallic acid equivalent (GAE)/g db (dry basis) was achieved with a mixture of 65% acetone–35% water (v/v) at 60 °C. The kinetics of the solvent-based TPC extraction processes were assessed via first-order and second-order kinetic models, with an associated investigation of the kinetic parameters and rate constants, saturation concentrations, and activation energies. The second-order kinetic model was sufficient to describe the extraction mechanism of TPC from AP. This study provides an understanding of the mass transfer mechanism involved in the polyphenolic compound extraction process, thus facilitating future large-scale design, optimization, and process control to valorize pomace waste. Graphical Abstract

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Potential Recovery of Biogas from Lime Waste after Juice Extraction Using Solid–Liquid Extraction Process

Recycling ◽

10.3390/recycling5020014 ◽

2020 ◽

Vol 5 (2) ◽

pp. 14

Author(s):

Oluwatosin J. Ogundare ◽

David O. Olukanni

Keyword(s):

Essential Oils ◽

Extraction Process ◽

Liquid Extraction ◽

Major Constituent ◽

Biogas Yield ◽

Soxhlet Apparatus ◽

Juice Extraction ◽

Solid Liquid Extraction ◽

Pre Treatment ◽

Solid Liquid

A large percentage of fruit mass is left as waste after the consumption or processing of citrus fruits. The inappropriate disposal of these wastes directly leads to environmental and economic concerns. However, scientific investigations have demonstrated that citrus wastes, due to their high concentration in soluble sugars, can be a source of cellulosic biomass for biogas recovery. d-Limonene, the major constituent of essential oils present in citrus wastes, is however, known to hamper the conversion process of citrus wastes to biogas. With the aim of improving biogas production, a study on the pre-treatment of lime fruit waste to reduce the effect of d-limonene was carried out. The pre-treatment process was done using hexane as the solvent in a solid–liquid extraction process to leach out essential oils from lime wastes. Solid–liquid extraction was carried out in a Soxhlet apparatus with pulverized lime waste at 68 °C for 180 min; then the residue was washed and aerated. From the pre-treatment procedure, 21.3 mL of essential oil was recovered, indicating an oil yield of 3.8%. Substrates of untreated and pre-treated lime waste were digested in batches under mesophilic conditions for a period of 28 days. The biogas yield of each substrate was evaluated and the results compared. Substrate of untreated lime waste yielded 66.9 mL/g VS. biogas after the digestion period. In comparison, pre-treated lime waste gave a better biogas yield of 93.2 mL/g VS. after 28 days, indicating an improvement in biogas yield by about 40%. The findings of this research show that there is a viable recovery option of biogas from lime waste, and recommendations of this research can be further explored to develop an economically viable biogas plant process that efficiently utilizes citrus wastes. This would boost the drive of government towards alternative sources of energy and also fulfil two of the sustainable development goals presented by the United Nations.

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Investigating the solid-liquid extraction process of puerarin by molecular dynamics simulations

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2019.118584 ◽

2019 ◽

Vol 143 ◽

pp. 118584 ◽

Cited By ~ 4

Author(s):

Yuefei Zhang ◽

Zhangli Zhou ◽

Lian Zou ◽

Mei Zhang ◽

Ruan Chi

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulations ◽

Extraction Process ◽

Liquid Extraction ◽

Solid Liquid Extraction ◽

Dynamics Simulations ◽

Solid Liquid

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Application of Statistical Solvent Mixture Design in Optimizing the Solid-Liquid Extraction of Phenolic Compounds from Mango Seed Kernels

Applied Science and Engineering Progress ◽

10.14416/j.asep.2021.02.001 ◽

2021 ◽

Vol 14 (2) ◽

Author(s):

Alden A. Cabajar ◽

Francis Dave C. Siacor ◽

Kramer Joseph A. Lim ◽

Camila Flor Y. Lobarbio ◽

Evelyn B. Taboada

Keyword(s):

Phenolic Compounds ◽

Extraction Process ◽

Solvent Mixture ◽

Liquid Extraction ◽

Mixture Design ◽

Positive Effects ◽

Lattice Design ◽

Solid Liquid Extraction ◽

Mango Seed ◽

Solid Liquid

Mango seed kernel (MSK) is a waste material of the mango processing industry and is reported to significantly contain phenolic compounds with anti-oxidative properties. In this work, these compounds are isolated via solid-liquid extraction (SLE) in which solvent mixture design approach was used to evaluate the optimal quaternary solvent ratio in relation to the phenolics content of extracts from MSK. The quaternary solvent is composed of ethanol (E), methanol (M), acetone (A), and water (W). The extraction process was implemented at 40°C for 60 minutes with the ratio between solid and solvent at 1:25. Response surface methodology coupled with simplex lattice design was developed to evaluate the optimal solvent system and their interaction effects on the phenolic compounds content. The linear, two-way, and three-way interaction, except for methanol-acetonewater system, resulted in positive effects on the phenolic compounds content. The response model shows that a quaternary mixture with approximately 3:3:3:1 E:M:A:W ratio provided the highest phenolic content. A Scheffé cubic model sufficiently described the extraction process. The results of this study showed that the extraction of phenolic compounds in MSK via SLE using a mixture of solvents is possible. Higher extraction efficiencies can be achieved by optimizing the SLE process, and the optimum conditions can be applied to produce phenolic extracts with positive antioxidant activity.

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