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

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

doi:10.7202/019166ar

Cited by 8 publications

(7 citation statements)

References 32 publications

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“…Furthermore, the values of the separation factor RL are between 0.05 and 0.55. This essential characteristic of the Langmuir isotherm defined by RL = 1/ (1 + KaCo) has been reported by many authors to indicate that the adsorption is favorable to the Langmuir isotherm model when 0 < RL < 1 [49][50][51].…”

Section: Equilibrium Studies and Isothermssupporting

confidence: 57%

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Kepdieu,

Djangang,

Njimou

et al. 2023

Preprint

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The present work aimed to use Oryza sativa husk (rice husk) in the fabrication of a nanosilica-doped smectic clay for the adsorption of Basic Blue 9 in synthetic aqueous solutions. Response surface methodology was used to evaluate the effects of the considered factors namely, initial dye concentration (10 - 30 mg/L), initial pH (8 - 11), and contact time (0 - 100 min) on the adsorption process. The regression model was found to be able to predict more than 99 % of the targeted response variation in the studied range (R2 = 99.98 %) based on 95% confidence. The analysis of variance proved the significance and the accuracy of the mathematical model. The F-values (1539.08) and p-values (< 0.05) generated by Minitab21 Sofware©, indicating that almost all the independent factors were statistically significant in the studied ranges. Based on the coefficients, initial dye concentration was more influential, followed by pH and contact time. Also, concentration x pH interaction was more effective followed by concentration x contact time. The pH x contact time interaction was very weak and those results were in accordance with factorial, surfaces, and contours plots. The pseudo-second-order kinetic and Langmuir models fitted well to the experimental data with determination coefficients of 0.976 and 0.965 respectively. Under the optimal conditions (30 mg/L, pH 11, t > 50 min; and adsorbent dose of 0.5 g/L, almost 96.33% of the dye was removed. Os-sm is thus an interesting and effective alternative for the removal of BB9 in aqueous solutions.

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Section: Equilibrium Studies and Isothermssupporting

confidence: 57%

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Kepdieu,

Djangang,

Njimou

et al. 2023

Preprint

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“…TEs biosorb on P. oceanica fibres, as shown for Cr by Ncibi et al (2008) and Krika et al (2012). Biosorption, even if more efficient at acidic pH, could also be relevant for many metals at natural seawater pH, as shown for the seaweed Sargassum spp.…”

Section: Trace Element Loss Kinetics In P Oceanica Shoots and Leavesmentioning

confidence: 95%

Experimental in situ exposure of the seagrass Posidonia oceanica (L.) Delile to 15 trace elements

et al. 2013

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“…The fibers can be found in large quantities at Tunisia's beach, and they are mainly considered as waste. The fibers have been previously investigated for the removal of contaminants from water by adsorption, showing a good and stable performance [4,[23][24][25]. The new POF/TiO 2 composite photocatalyst, in which a better utilization of the P25 particles is assumed, is prepared by the sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of TiO2 Semiconductor Nanoparticles onto Posidonia Oceanica Fibers for Photocatalytic Phenol Degradation

Morjène

Schwarze

Seffen

et al. 2021

Water

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A new composite photocatalyst called POF/TiO2 was prepared from commercial P25 TiO2 and Posidonia oceanica fibers (POF), a biomaterial collected from Tunisia’s beach. The composite material was prepared by a classical sol-gel synthesis and was characterized by different methods. SEM images show a TiO2 layer formed on top of the fibers, which was verified by XRD and XPS. Diffuse reflectance UV-vis spectroscopy shows that the layer has the same optical properties (Eg = 3.0 eV) as bulk P25. The photodegradation of phenol as a model compound was studied under different operating conditions using POF/TiO2 and the results show degradation efficiencies between 4% (100 ppm) and 100% (<25 ppm) after 4 h of UV-C light irradiation (254 nm) using a POF/TiO2 concentration of about 1 g/L. The composite material showed good stability and could be recycled up to three times.

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

Cited by 8 publications

References 32 publications

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Experimental in situ exposure of the seagrass Posidonia oceanica (L.) Delile to 15 trace elements

Immobilization of TiO2 Semiconductor Nanoparticles onto Posidonia Oceanica Fibers for Photocatalytic Phenol Degradation

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