Modeling and kinetics study of conventional and assisted batch solvent extraction

Chan, Candy King-Chi; Yusoff, Rozita; Ngoh, Gek Cheng

doi:10.1016/j.cherd.2013.10.001

Cited by 154 publications

(87 citation statements)

References 73 publications

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“…Other materials will have various conditions for extraction and the ratio of solvent-to-material was collected due to the purpose of study. 8,14,16 Results and interpretation are consistent with the theory of mass transfer was announced by Chan et al, (2014). 31 In brief, the ratio of solventmaterial effect on extracted PC and AA from brown algae Sargassum serratum.…”

Section: Effect Of Extract Timessupporting

confidence: 64%

“…8,14,16 Results and interpretation are consistent with the theory of mass transfer was announced by Chan et al, (2014). 31 In brief, the ratio of solventmaterial effect on extracted PC and AA from brown algae Sargassum serratum. The solvent-to-material ratio of 40/1 (v/w) was collected for afterwards, was showed in the Figure 3.…”

Section: Effect Of Extract Timessupporting

confidence: 64%

“…Antioxidant phlorotannin content was extracted to due to the balance of solute between the solvent and intracellular of algae. 31 In addition, extracted phlorotannins were existed in free status, because the linkages between phlorotannins and the cell wall were destroyed. The ratio of solvent-to-material is greater, extracted phlorotannins are more and free phlorotannins are more.…”

Section: Effect Of Extract Timesmentioning

confidence: 99%

“…The time of extraction of phlorotannin and antioxidant activities was different for various materials. 3,8,13,33,34 According to Fick's law and the publish of Chan et al (2014) shows that the solute was limited and got the maximum value in the special time.…”

Section: Effect Of Extract Timesmentioning

confidence: 99%

“…3,8,13,33,34 According to Fick's law and the publish of Chan et al (2014) shows that the solute was limited and got the maximum value in the special time. 31 Therefore, the extracting time effect on PC and AA, and the extracting time of 32 hrs was fit for the extraction of phlorotannin and antioxidant activities from brown algae Sargassum serratum. The Figure 6 showed that phlorotannin of brown algae Sargassum serratum was unstable in the acid and alkaline medium.…”

Section: Effect Of Extract Timesmentioning

confidence: 99%

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Effects of extraction conditions over the phlorotannin content and antioxidant activity of extract from brown algae Sargassum serratum (Nguyen Huu Dai 2004)

Boi

Cường²,

Vinh

2016

FRA

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Introduction: This study focused on the discussion of effect of various extraction conditions for phlorotannin content and antioxidant activities extracted from brown algae Sargassum serratum. The algae was grown in the tropical coastal areas of Vietnam. Methods: The various extraction conditions include the following parameters: temperature (30-80 0 C), maceration time (1/2-2,5 hours; 8-48 hrs), the ratio of solvent to material (10:1-70:1 (v/w)), pH (2-8), various kind of solvents (ethanol, acetone, chloroform, ethyl acetate and n-hexan) and solvent concentrations. Phlorotannin content, antioxidant activities, and some phytochemical compositions of Sargassum serratum were evaluated. Results: The highest phlorotannin content and antioxidant activities was expressed when extracting in the following conditions: 100% ethanol solvent at 50 0 C in 32 hours with the ratio of solvent to material of 40/1 (v/w), pH 7 and one-step extraction. The extract contained flavonoid, terpenoid, alkaloid, fatty and oil. DPPH free radical scavenging of the extract was 87.53%. Conclusion:Phlorotannin content and antioxidant activities extracted from Sargassum serratum was depended on the extracting conditions. The condition of extraction for antioxidant phlorotannin and the chemical composition of extract was determined. Brown algae Sargassum serratum has high antioxidant phlorotannin content. A total of 6 compounds were identified from the extract of Sargassum serratum.Key words: Antioxidant, Brown algae, Extraction, Phlorotannin, Sargassum. Correspondence :Vu Ngoc Boi, Nhatrang University, Ministry of Training and Education Nguyen Dinh Chieu street, Nhatrang city, Khanhhoa province, VIETNAM. 100%; the ratio of ethanol solvent to sample of 10:1, 20:1, 30:1, 40:1, 50:, 60:1 and 70:1 (v/w); different temperatures of 30, 40, 50, 60, 70 and 80°C; different times 0.5, 1.0, 1.5, 2.0, 2.5, 8.0, 16.0, 24.0, 32.0, 40.0 and 48.0 h; pH of 2, 3, 4, 5, 6, 7 and 8; and the repeat of extracting times in choiced condition. The extract were then centrifuged at 2500 rpm for 10 mins at 4°C and filtered with Whatman no. 4 filter paper, and analysed. Determination of total phlorotannin content (PC)The total phlorotannin content (PC) of extracts was quantified according to the Folin-Ciocalteu's method. 20 300 μL of extracts was mixed with 1 mL of 10% Folin-Ciocalteu reagent. After keeping the mixture for 5 mins, 2 mL of 10% sodium carbonate was added. The samples were incubated for 1.5 h at room temperature in the dark. The absorbance was measured at 750 nm. Phloroglucinol was used as the standard. The results were expressed as milligrams of phloroglucinol equivalents (PGEs) per g dry weight of sample. Total antioxidant activityTotal antioxidant activity (TA) of extracts was determined according to the method of Prieto et al. (1999).21 100 µL of extracts was mixed with 3 mL of reagent (0.6 M sulfuric acid, 28 mM sodium phosphate and 4 mM ammonium molybdate) and 900 µL of distilled water. The samples were incubated at 95°C for 90 min in water ba...

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Section: Effect Of Extract Timessupporting

confidence: 64%

Section: Effect Of Extract Timessupporting

confidence: 64%

Section: Effect Of Extract Timesmentioning

confidence: 99%

Section: Effect Of Extract Timesmentioning

confidence: 99%

Section: Effect Of Extract Timesmentioning

confidence: 99%

See 3 more Smart Citations

Effects of extraction conditions over the phlorotannin content and antioxidant activity of extract from brown algae Sargassum serratum (Nguyen Huu Dai 2004)

Boi

Cường²,

Vinh

2016

FRA

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Extraction modeling, kinetics, and thermodynamics of solvent extraction of Irvingia gabonensis kernel oil, for possible industrial application

Agu

Menkiti

Ohale

et al. 2020

Engineering Reports

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The effects of the temperature, time, and particle size, in addition to the kinetics and thermodynamics parameters, of Irvingia gabonensis kernel oil (IGKO) yield were investigated. The highest oil yield of 68.80% (by weight) was obtained at 55 • C, 150 minutes, and 0.5 mm. The evaluated physicochemical properties of IGKO indicated that viscosity, acidity, dielectric strength, flash, and pour points were 19.37 mm 2 s −1 , 5.18 mg KOH g −1 , 25.83 kV, 285 • C, and 17 • C, respectively, suggesting its feasibility as transformer fluid upon further treatments. Between the pseudo-second order and hyperbolic kinetic models studied, the former best describes the experimental data. ΔH, ΔS, and ΔG values of IGKO extraction at 0.5 mm and 328 K were, 251.81 kJ mol −1 , 1.08 kJ mol −1 , and −105.49 kJ mol −1 , respectively, indicating the endothermic, irreversible, and spontaneous nature of the process. The kinetic model equations that describe the process were successfully developed for both models based on the process parameters.

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Green Chemistry in Analytical Chemistry

Zuin

Segatto

Ramin

2018

Encyclopedia of Sustainability Science and Technology

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Modeling and kinetics study of conventional and assisted batch solvent extraction

Cited by 154 publications

References 73 publications

Effects of extraction conditions over the phlorotannin content and antioxidant activity of extract from brown algae Sargassum serratum (Nguyen Huu Dai 2004)

Effects of extraction conditions over the phlorotannin content and antioxidant activity of extract from brown algae Sargassum serratum (Nguyen Huu Dai 2004)

Extraction modeling, kinetics, and thermodynamics of solvent extraction of Irvingia gabonensis kernel oil, for possible industrial application

Green Chemistry in Analytical Chemistry

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