Equilibria, Kinetics, and Mechanisms for the Adsorption of Four Classes of Phenolic Compounds onto Synthetic Resins

Pompeu, Darly Rodrigues; Moura, Fábio Gomes; Silva, Evaldo Martins da; Rogez, Hervé

doi:10.1080/01496390903562274

Cited by 18 publications

(12 citation statements)

References 25 publications

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“…According to Weber (1972), the behavior of the isotherms of caffeic ( Figure 4A) and ferulic ( Figure 4B) acids indicates favorable adsorption, the behavior of the catechin isotherm ( Figure 3) at pH 7.0 indicates unfavorable adsorption, and the linear behavior of the catechin isotherm at pH 2.0 indicates an intermediate process. Some authors have observed similar behaviors by adsorption isotherms of PCs in synthetic resins (Li et al, 2002;Bilgili, 2006;Pompeu et al, 2010;Gao et al, 2013).…”

Section: Adsorption Isothermsmentioning

confidence: 51%

“…The Q M values were well below those reported in the literature for the adsorption of caffeic (45.13-63.13 mg/g) and ferulic (95.66-117.63 mg/g) acids onto synthetic macroporous resins (Pompeu et al, 2010).…”

Section: Adsorption Isothermsmentioning

confidence: 75%

“…Pompeu et al (2010) observed adsorption capacities of 13.3, 6.3 and 11.7 mg/100 mg of synthetic macroporous resin for catechin, and caffeic and ferulic acids, respectively. The low levels of adsorption observed in this study could be attributed to the lower specific areas of the DFs compared with the synthetic resins and a greater affinity of the phenols for the water solvent than for the fibres.…”

Section: Adsorption Kineticsmentioning

confidence: 96%

“…The low levels of adsorption observed in this study could be attributed to the lower specific areas of the DFs compared with the synthetic resins and a greater affinity of the phenols for the water solvent than for the fibres. Microcrystalline cellulose has a specific area of 2.39 m 2 /g (Padilha et al, 1995), whereas this value varies between 400 and 1200 m 2 /g for macroporous resins (McCabe et al, 2005;Pompeu et al, 2010). Dther phenols also showed superior adsorption on synthetic resins and other materials (Li et al, 2002;Bilgili, 2006;Strachowski & Bystrzejewski, 2015).…”

Section: Adsorption Kineticsmentioning

confidence: 99%

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Adsorption capacity of phenolic compounds onto cellulose and xylan

Costa¹,

Rogez²,

Pena³

2015

Food Sci. Technol (Campinas)

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The interaction between three phenolic compounds (catechin, caffeic acid and ferulic acid) onto two dietary fibres (cellulose and xylan) has been evaluated to inquire possible interferences on the biodisponibility of phenolic compounds. The adsorption kinetics were performed using solutions containing 100 mg/L of phenolic compounds during a contact time ranging between 10 and 120 minutes at pH 2.0, 4.5, and 7.0. After the kinetics, isotherms were obtained using phenolic compounds concentration ranging between 10 and 80 mg/L during 60 minutes, at pH 2.0 and 7.0 and temperature of 36 °C. Results indicate that adsorbed quantities mainly changed in function of pH, however the maximum adsorption was only of 0.978 mg of caffeic acid/g of xylan at pH 2 and after 60 min. Redlich-Peterson model were able to predict the adsorption isotherms of all phenolic compounds onto cellulose, except for caffeic acid at pH 7.0. The low adsorption capacities observed suggest that both dietary fibres are unable to compromise the biodisponibility of phenolic compounds, especially in the small intestine, where they are partially absorbed.

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Section: Adsorption Isothermsmentioning

confidence: 51%

Section: Adsorption Isothermsmentioning

confidence: 75%

Section: Adsorption Kineticsmentioning

confidence: 96%

Section: Adsorption Kineticsmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption capacity of phenolic compounds onto cellulose and xylan

Costa¹,

Rogez²,

Pena³

2015

Food Sci. Technol (Campinas)

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“…nanoencapsulation, adsorption onto macroporous resins. [11][12][13][14][15] Lipophilic derivatives of phenolic compounds generally maintain their antioxidant activity and, in some cases, exhibit novel bioactivities that are not found in the original phenolic compounds. [16][17][18] To potentiate the use of polyphenolic antioxidants from natural sources, in addition to the extraction and purification of these compounds, it is necessary to use a process that separates the aglycones (more apolar) from the carbohydrates, such as acid hydrolysis.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Acid Hydrolysis of Myricetin-3-O-rhamnoside Using Response Surface Methodology

Tolosa¹,

Rogez²,

Silva³

et al. 2018

J. Braz. Chem. Soc.

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This study aimed to optimize the acid hydrolysis of glycosylated flavonols, to apply the optimum conditions for hydrolyzing Inga edulis extract (IEE), rich in glycosylated flavonols, and evaluating its impact on the antioxidant capacity. To evaluate the influence of three independent variables on the aglycone obtained after the reaction, the response surface methodology was applied using myricetin-3-O-rhamnoside (M3R) as a pure compound. The phenolic compound profile and antioxidant capacity were determined by high-performance liquid chromatography (HPLC) and the Trolox-equivalent antioxidant capacity (TEAC) assay, respectively. The maximum content of the aglycone myricetin (81.15%) occurred with 2.5 M HCl at 75 °C for 60 min. Under these conditions, the IEE produced the aglycones myricetin, quercetin and cyanidin. The TEAC values of the M3R samples and IEE before and after acid hydrolysis did not show significant differences (p > 0.05). These results suggest that the hydrolytic process is effective to produce aglycone flavonoids from leaf extracts of I. edulis, and probably for other plant extracts rich in M3R.

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A Fully Automated Ad‐ and Desorption Method for Resin and Solvent Screening

Schuldt

Schembecker

2013

Chem Eng & Technol

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Ad‐ and desorption are common techniques for the purification of natural substances. The main drawback is the tedious experimental procedure for resin and solvent screening. An approach of fully automated batch experiments is presented. In order to fulfill all requirements like automation of flexible dosing of loose resins, handling organic solvents, and providing reproducible conditions, these experiments are performed on a custom‐built modular robotic platform. The batch ad‐ and desorption experiments were fully automated for the determination of essential process parameters like kinetics, isotherms, and thermodynamic parameters without the need of manual intervention. Thus, the hands‐on time could be significantly reduced by more than 90 % which contributes to improved health and safety outcome by preventing the contact of operators to potentially hazardous materials.

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Equilibria, Kinetics, and Mechanisms for the Adsorption of Four Classes of Phenolic Compounds onto Synthetic Resins

Cited by 18 publications

References 25 publications

Adsorption capacity of phenolic compounds onto cellulose and xylan

Adsorption capacity of phenolic compounds onto cellulose and xylan

Optimization of Acid Hydrolysis of Myricetin-3-O-rhamnoside Using Response Surface Methodology

A Fully Automated Ad‐ and Desorption Method for Resin and Solvent Screening

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