Adsorption of ibuprofen from wastewater using activated carbon and graphene oxide embedded chitosan–PVA: equilibrium, kinetics, and thermodynamics and optimization with central composite design

Şahin, Oya Irmak; Saygi-Yalcin, Berrin; Saloglu, Didem

doi:10.5004/dwt.2020.25027

Cited by 30 publications

(17 citation statements)

References 43 publications

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“…Linear, two-factor interactive (2FI), quadratic, and cubic models were adapted to the MAE experimental studies to obtain the regression statistics models. The adequacy of the models was decided by two different tests, which are sequential model sum of squares (SMSS) and model summary statistics tests (Sahin et al, 2020). In the current study, the fit summary of the experimental results of MAE illustrated that the quadratic models for TPC, DPPH, and CUPRAC were statistically significant, with sequential p-values of <0.0001 and regression coefficients that were acceptable for MAE of artichokes.…”

Section: Fitting the Modelmentioning

confidence: 76%

“…Design Expert software (Version 11.0.0, Stat-Ease, Inc., Minneapolis, MN) was employed for the modelling and optimization of the MAE process (Sahin et al, 2020;Saponjac et al, 2020). An adjusted coefficient of determination, coefficient of determination, probability value at 95% confidence interval, predicted R 2 , coefficient of variation, lack-of-feet, and analysis of variance (ANOVA) were used as statistical indicators.…”

Section: Modelling the Mae Of The External Bracts And Leaf Mixture Of The Artichoke Using Ccdmentioning

confidence: 99%

“…MAE experimental data were controlled using ANOVA analysis, and the ANOVA analysis was used to control the statistical significance of the quadratic model by checking the p-values and the f-values. In ANOVA, a model with low p-values (p < .05) and high f-values (f > 5.0) can be accepted as suitable (Sahin et al, 2020). TPC, DPPH, and CUPRAC values of the external bracts and leaf mixture extracts were examined by ANOVA using p-values and f-values.…”

Section: Fitting the Modelmentioning

confidence: 99%

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Optimization and kinetic modelling of microwave-assisted extraction of phenolic contents and antioxidants from Turkish artichoke

Kayahan

Saloglu

2020

CyTA - Journal of Food

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Replacing traditional extraction technology with ultrasonic or microwave-assisted extraction has attracted considerable attention. In order to maximize the yield of extracted polyphenolic compounds and antioxidants from Sakiz artichoke by-products, a central composite design (CCD) was applied to optimize the microwave-assisted extraction (MAE) in the current study. The study found that the optimal conditions for MAE of Sakiz artichoke by-products were: extraction time 6 min; ethanol/water ratio 50:50 (v/v); (ethanol-water)/solid ratio 15:1 mL/g; microwave power 320 W; and temperature 80°C; resulting in the total phenolic compounds (TPC), DPPH, and CUPRAC antioxidant activity values of 607 mg GAE/100 g, 878 mg TE/100 g, and 2922 mg TE/100 g, respectively. The extraction of TPC, DPPH, and CUPRAC antioxidants from artichoke by-products was investigated by the first-order, second-order, Peleg's, and Page's kinetic models. These results confirmed that MAE has a great potential for the extraction of polyphenolic compounds and antioxidants from Sakiz artichoke by-products.Optimización y modelado cinético de la extracción de contenidos fenólicos y antioxidantes de la alcachofa turca asistida por microondas RESUMEN La sustitución de la técnica de extracción tradicional por la extracción ultrasónica o asistida por microondas ha generado considerable atención. Con el propósito de maximizar el rendimiento de los compuestos polifenólicos y antioxidantes extraídos de los subproductos de la alcachofa de Sakiz, en el presente estudio se aplicó un diseño compuesto central (CCD) para optimizar la extracción asistida por microondas (MAE). El estudio determinó que las condiciones óptimas para la MAE de los subproductos de dicha alcachofa eran: tiempo de extracción 6 min; relación etanol/agua 50:50 (v/v); relación (etanol/agua)/sólido 15:1 mL/g; potencia de las microondas 320 W; y temperatura 80°C. Estas condiciones produjeron valores de actividad antioxidante de los compuestos fenólicos totales (TPC), DPPH y CUPRAC de 607 mg GAE/100 g, 878 mg TE/100 g y 2,922 mg TE/100 g, respectivamente. La extracción de TPC y de antioxidantes DPPH y CUPRAC de los subproductos de la alcachofa fue investigada aplicando modelos cinéticos de primer orden, segundo orden, de Peleg y de Page. Los resultados obtenidos confirmaron que la MAE tiene gran potencial para la extracción de compuestos polifenólicos y antioxidantes de los subproductos de la alcachofa Sakiz.

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Section: Fitting the Modelmentioning

confidence: 76%

Section: Modelling the Mae Of The External Bracts And Leaf Mixture Of The Artichoke Using Ccdmentioning

confidence: 99%

Section: Fitting the Modelmentioning

confidence: 99%

See 1 more Smart Citation

Optimization and kinetic modelling of microwave-assisted extraction of phenolic contents and antioxidants from Turkish artichoke

Kayahan

Saloglu

2020

CyTA - Journal of Food

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“…The thermodynamic parameters including change in the Gibbs free energy (Δ G 0 ), enthalpy (Δ H 0 ), and entropy (Δ S 0 ) were calculated using Equations (Ozcan & Saloglu, 2020; Sahin et al, 2020).

{ΔG}^{0} = - italicRT \ln K_{c}

\ln K_{c} = ()(, \frac{- {italicΔH}^{0}}{italicRT}) + ()(, \frac{{italicΔS}^{0}}{R})

K_{c} = \frac{q_{e}}{C_{e}}

…”

Section: Resultsmentioning

confidence: 99%

Removal of naproxen from wastewater using chitosan–aerogel–activated carbon biocomposites: Theory, equilibrium, kinetics, thermodynamics, and process optimization

Ozcan

Yalcin

Şimşek

et al. 2022

Water Environment Research

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This study investigated the performance of chitosan–aerogel–activated carbon (CHT:AEO:AC) biocomposite as an adsorbent for the removal of naproxen from wastewater. Naproxen removal in % was 99, 33, 62, and 90 using 300 mg of raw AC, raw CHT, CHT:AEO, and CHT:AEO:AC, respectively. Langmuir, Freundlich, Dubinin–Radushkevich (D–R), and Temkin isotherm models were used to obtain adsorption isotherms. Chi‐squared (χ2) and correlation coefficients (R2) values showed that the parameters of the Freundlich, Temkin, and D–R models were more suitable for naproxen adsorption than the Langmuir model for raw CHT, CHT:AEO, and CHT:AEO:AC, whereas the Langmuir model fitted well for raw AC. The adsorption of naproxen onto biocomposites was defined by pseudo‐second‐order kinetic model, and adsorption rate constants were 0.245, 0.036, 0.075, and 0.147 mg g−1 min−1 for raw AC, raw CHT, CHT:AEO, and CHT:AEO:AC, respectively. The impact of optimum process conditions on naproxen adsorption was explored using response surface methodology. The optimum independent variables were 288.94 mg, 29.64°C, and 372.5 min, leading to a rate of naproxen removal onto CHT:AEO:AC of 90.29%. Practitioner Points Naproxen adsorption from wastewater using chitosan–aerogel–activated carbon biocomposite (CHT:AEO:AC) was investigated. The effects of the amount of biocomposite, temperature, and time on the adsorption were investigated. Optimization of the process conditions was carried out using the response surface methodology.

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“…where, C 0 is the initial adsorbent concentration in solution (mg/L), V is the solution volume (L), m is the weight of adsorbent used per liter of solution (g/L), q t (mg/g) is the amount of adsorbent retained at time t, and α (<1) and k 0 are constants. The Bangham model was tested to adsorb pharmaceutical compounds [35,36].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Synthetic Clays to Remove Phosphates and Ibuprofen in Water

Rey

Val

Feijoo

et al. 2021

Water

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The main objective of this study consists in the synthesis of a layered double hydroxide (LDH) clay doped with magnesium and aluminum in order to test the removal of phosphates and ibuprofen in water. Two different LDH composites are assessed: oven-dried (LDHD) and calcined (LDHC). Single adsorptions of phosphate and ibuprofen showed up to 70% and 58% removal in water, when LDHC was used. A poorer performance was observed for LDHD, which presented adsorption efficiencies of 52% and 35%, respectively. The simultaneous removal of phosphate and ibuprofen in water showed that LDHC allows a greater reduction in the concentration of both compounds than LDHD. Phosphate adsorption showed a close agreement between the experimental and theoretical capacities predicted by the pseudo-second-order model, whereas ibuprofen fitted to a first-order model. In addition, phosphate adsorption showed a good fit to an intraparticle diffusion model and to Bangham model suggesting that diffusion into pores controls the adsorption process. No other mechanisms may be involved in ibuprofen adsorption, apart from intraparticle diffusion. Finally, phosphate desorption could recover up to 59% of the initial concentration, showing the feasibility of the recuperation of this compound in the LDH.

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Adsorption of ibuprofen from wastewater using activated carbon and graphene oxide embedded chitosan–PVA: equilibrium, kinetics, and thermodynamics and optimization with central composite design

Cited by 30 publications

References 43 publications

Optimization and kinetic modelling of microwave-assisted extraction of phenolic contents and antioxidants from Turkish artichoke

Optimization and kinetic modelling of microwave-assisted extraction of phenolic contents and antioxidants from Turkish artichoke

Removal of naproxen from wastewater using chitosan–aerogel–activated carbon biocomposites: Theory, equilibrium, kinetics, thermodynamics, and process optimization

Preparation of Synthetic Clays to Remove Phosphates and Ibuprofen in Water

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