Studies on the Biosorption of Textile Dyes from Aqueous Solutions Using Posidonia Oceanica (L.) Leaf Sheath Fibres

Ncibi, Mohamed Chaker; Mahjoub, Borhane; Seffen, Mongi

doi:10.1260/026361706780154383

Cited by 39 publications

(20 citation statements)

References 37 publications

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“…This is due to an anionic repulsion. Similar results are obtained for other biological matrices such as Posidonia fibers (Ncibi et al, 2009), Luffa cylindrica (Kesraoui et al, 2015) and Date palm leaf base (Alsenani, 2014).…”

Section: Influence Of Initial Phsupporting

confidence: 85%

“…The positive value of the enthalpy change ∆H° shows that the biosorption process was endothermic. The same result has been observed for the adsorption of Direct and Reactive dyes from Posidonia oceanic (Ncibi et al, 2006). Positive values of the entropy ∆S° indicate the good affinity of the biosorbent towards AB dye (Namasivayam and Kavitha, 2002;Alsenani, 2014).…”

Section: Thermodynamic Analysissupporting

confidence: 79%

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Valuation of Biomaterial: Phragmites australis in the Retention of Metal-Complexed Dyes

Kesraoui

Mabrouk

Seffen

2017

American Journal of Environmental Sciences

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Abstract:The purpose of this research was to estimate the potential of cellulosic fibers of highly available and renewable Tunisian biomass Phragmites australis for the biosorption of an anionic metal complexed dye: Alpacide blue. The present study shows that the Phragmite australis were used successfully for the adsorption of Alpcide blue from aqueous solution. Equilibrium was reached after 5 h at 20°C and at pH 2. Optimal adsorption parameters for adsorption of dye onto fibers extract of upper rods were accomplished after 5 h of biosorption using an initial dye concentration of 50 mg L −1 , biosorbent amount of 0.5 g of Phragmites australis, pH 2 and a granulometry size between 250 and 500 µm. In these conditions, the adsorbed amount of Alpacide blue is 6.11 mg g −1 and the biosorption percentage is 85.9%. When the temperature increases until 60°C, the retention rate increases also to reach a value of 90.5%. Regarding fibers extracted from roots, we notice improvement of the adsorbed amount which reaches 7.0 mg g −1 and the overall retention rate of 92.6% at 20°C. While at 60°C the amount adsorbed is 7.4 mg g −1 and the fixation rate reached 94%. The biosorption phenomenon seems to be endothermic. Moreover the adsorption process is fast, following the model of pseudo-second order for both parts of the plant stems and roots. Finally, mathematical modeling of adsorption isotherms showed that the Freundlich model perfectly describes the biosorption of organic dye studied by these fibers of Phragmites australis for both stems and roots.

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Section: Influence Of Initial Phsupporting

confidence: 85%

Section: Thermodynamic Analysissupporting

confidence: 79%

Valuation of Biomaterial: Phragmites australis in the Retention of Metal-Complexed Dyes

Kesraoui

Mabrouk

Seffen

2017

American Journal of Environmental Sciences

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“…The second model used to fit the experimental data of the dye adsorption is the pseudo-second-order, which is applicable to a larger interval of time (Ncibi et al 2006). It is described as follow:…”

Section: Adsorption Kineticmentioning

confidence: 99%

“…The n values ranging between 1 and 10 constituted a measure of adsorption intensity or surface heterogeneity, becoming more heterogeneous as its value was around to 10 (Kesraoui et al 2015). Therefore, the Freundlich exponent value was equal to 1 for MB and IC; both were in the 1-10 range indicating favorable adsorption (Ncibi et al 2006). Sips isotherm is a combination between Langmuir and Freundlich forms isotherm models (Foo and Hameed 2010).…”

Section: Adsorption Isothermsmentioning

confidence: 99%

The alternating and direct current effect on the elimination of cationic and anionic dye from aqueous solutions by electrocoagulation and coagulation flocculation

Othmani

Kesraoui

Seffen

2017

Euro-Mediterr J Environ Integr

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In this study, we investigated the effect of alternating current (AC) and direct current (DC) on the elimination of methylene blue (MB) and indigo carmine (IC) by the electrocoagulation process using two Pb electrodes in comparison with the coagulation-flocculation process. Different parameters influencing the elimination of these dyes were studied, namely initial dye concentration, initial pH, voltage, temperature, coagulant and flocculant concentration and current density. The elimination of MB reached 98.8% with AC and 97.3% with DC at current density of 0.5 A/m 3 and pH of 7.0. However, the energy consumed was lower in the case of AC (4.89 9 10 -6 kWh/m 3 ) than DC (7.6 9 10 -6 kWh/m 3 ). The elimination was also faster in the case of AC (0.47 mg L -1 /min) than the DC (0.066 mg L -1 /min). The same behavior was observed with the IC where the effectiveness of dye elimination was, respectively, 98.5 and 100% with an energy consumed (E c ) of 4.35 9 10 -5 and 2.03 9 10 -6 kWh/m 3 , respectively, with DC and AC. The adsorption kinetic data were obtained using pseudo-firstorder and pseudo-second-order models. The pseudo-second-order was more appropriate describing the adsorption kinetics of methylene blue and the pseudo-first-order was more appropriate describing the adsorption kinetics of indigo carmine. Langmuir, Freundlich and Sips models were used to optimize the elimination dye process. The Sips model displayed the best fit of the equilibrium data.

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“…Une modélisation des isothermes d'adsorption et une étude thermodynamique ont été également réalisées afin de comprendre la nature des mécanismes réactionnels mis en jeu lors du présent phénomène de biosorption. Notons que cette biomasse a déjà donné des résultats prometteurs lors d'études d'adsorption du phénol (NCIBI et al, 2006a), de colorants textiles (NCIBI et al, 2006b) et du bleu de méthylène (NCIBI et al, 2007).…”

Section: Introductionunclassified

Étude de la biosorption du chrome (VI) par une biomasse méditerranéenne : Posidonia oceanica (L.) delile

Ncibi

Mahjoub

Seffen³

2008

rseau

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Les fibres du végétal marin Posidonia oceanica (L.) ont été utilisées en tant que nouvel adsorbant biologique pour l’élimination du chrome hexavalent des solutions aqueuses artificiellement contaminées. Les expériences ont été effectuées en lots aussi bien pour les cinétiques que pour les isothermes d’adsorption. Les variables expérimentales étudiées sont le pH, la température, la quantité de biomasse et la concentration initiale de Cr(VI). Le maximum de biosorption a été observé pour un pH 2. La capacité de biosorption semble être optimisée par une augmentation de la température, de la quantité de biosorbant et de la concentration initiale. Les isothermes d’adsorption sont en accord avec les modèles de Redlich-Peterson et Langmuir. De plus, l’analyse thermodynamique a révélé que le présent processus d’adsorption est un phénomène favorable, endothermique et spontané.The marine biomass Posidonia oceanica (L.) fibres were used as a novel low cost biological adsorbent for the removal of hexavalent chromium from artificially contaminated aqueous solutions. Experiments were carried out for sorption kinetics and isotherms in a batch system. The operating variables studied were pH, temperature, biomass quantity and initial chrome concentration. The maximum adsorption removal was observed at pH 2. The biosorption capacity of P. oceanica fibres for Cr(VI) was enhanced by increasing the temperature, the biosorbent amount and initial chromium concentration. The isotherm adsorption data were satisfactorily found to be described by both Redlich-Peterson and Langmuir. Besides, the thermodynamic studies revealed that the present adsorption process is a favourable, endothermic and spontaneous phenomenon

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Studies on the Biosorption of Textile Dyes from Aqueous Solutions Using Posidonia Oceanica (L.) Leaf Sheath Fibres

Cited by 39 publications

References 37 publications

Valuation of Biomaterial: <i>Phragmites australis</i> in the Retention of Metal-Complexed Dyes

Valuation of Biomaterial: <i>Phragmites australis</i> in the Retention of Metal-Complexed Dyes

The alternating and direct current effect on the elimination of cationic and anionic dye from aqueous solutions by electrocoagulation and coagulation flocculation

Étude de la biosorption du chrome (VI) par une biomasse méditerranéenne : Posidonia oceanica (L.) delile

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