Élimination du colorant basique « Bleu de Méthylène » en solution aqueuse par l’argile de Safi

Karim, Asmaa Bennani; Badia, Mounir; Hachkar, Mohsine; Bakasse, M.; Yaacoubi, Abdelrani

doi:10.7202/045099ar

Cited by 21 publications

(16 citation statements)

References 15 publications

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“…Such dyes are pollutants themselves. They are widely used for industrial purposes, especially MB in the textile industry [25], they reduce light penetration and photosynthesis in the effluents. Their removal remains a challenge [26].…”

Section: Resultsmentioning

confidence: 99%

An efficient recyclable magnetic material for the selective removal of organic pollutants

Monteil¹,

Bar²,

Bée³

et al. 2016

Beilstein J. Nanotechnol.

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SummaryWastewater cleaning strategies based on the adsorption of materials are being increasingly considered, but the wide variety of organic pollutants at low concentrations still makes their removal a challenge. The hybrid material proposed here consists of a zwitterionic polyethylenimine polymer coating a magnetic core. Polyethylenimine is phosphonated at different percentages by a one-step process and used to coat maghemite nanoparticles. It selectively extracts high amounts of cationic and anionic contaminants over a wide range of pH values, depending on the adjustable number of phosphonate groups introduced on the polymer. After recovering the nanoparticles with a magnet, pollutants are quantitatively released by repeated washing with low amounts of pH-adjusted water. The material can be reused many times without noticeable loss of efficiency and is designed to resist high temperatures, oxidation and harsh conditions.

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Section: Resultsmentioning

confidence: 99%

An efficient recyclable magnetic material for the selective removal of organic pollutants

Monteil¹,

Bar²,

Bée³

et al. 2016

Beilstein J. Nanotechnol.

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“…us, the increase in hydrogen ions created competition with dye cations for the active sites of clay surface [48,49]. e same effect of pH was observed for basic textile dyes adsorption on natural clay [14]. However, for negatively charged dyes, the reverse effect was observed [22].…”

Section: Effect Of Ph and Temperaturementioning

confidence: 88%

“…Due to their properties cited above, several clays with different mineralogies have been tested for removal by adsorption of multiple dyes. Untreated or modified clays were tested for the removal of cationic [12,[14][15][16] and anionic dyes [14,[17][18][19]. Clay dominated or containing smectite has shown a high efficiency in the retention of dyes [17,20].…”

Section: Introductionmentioning

confidence: 99%

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Removal Properties, Mechanisms, and Performance of Methyl Green from Aqueous Solution Using Raw and Purified Sejnane Clay Type

Satlaoui

Trifi

Romdhane

et al. 2019

Journal of Chemistry

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Adsorption of cationic methyl green (MG) on nontreated (AB) and purified (AP) natural Sejnane clay type was studied in an equilibrium batch process. This work reported the application of kaolinite-rich heterogeneous clay for the removal of a cationic dye. Effects of contact time, initial dye concentration, mass adsorbent, pH, and temperature on the MG removal were checked. The adsorbent before and after adsorption processes was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and atomic adsorption spectrophotometer. Equilibrium data were mathematically modeled using the Freundlich, Langmuir, and intraparticle diffusion models. Kinetic of adsorption was determined by pseudo-first-order and pseudo-second-order models. The free energy (ΔG°), standard enthalpy (ΔH°), and standard entropy (ΔS°) were calculated. A fast increase in the equilibrium removal of the cationic dye was obtained at a pH ranging between 3 and 11 and moderate temperature. This rapid MG adsorption proved the efficiency of kaolinite clay in cationic dye removal. Decolorizing yields were 73.3% for AB and 99.8% for AP. Thus, the adsorption capacity of purified clay was clearly higher than of H2SO4 and thermic activated clays. The data more closely resembled a pseudo-second-order model process, and the clay had reasonable Freundlich adsorption capacity. Adsorption process was endothermic and spontaneous chemisorption. SEM analysis showed that the adsorbed MG had remarkably changed the morphology of raw and purified clay surface. The low desorption rates confirmed effectiveness of this type of material for the retention of methyl green molecules. Thus, tested clays have no environmental impact.

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“…The high adsorption rate of sulphates compared to that of phosphates is firstly due to the high concentration of sulphate that characterizes the slaughterhouse effluent from Ngaoundé ré . Indeed, the adsorption rate of a pollutant also increases on an adsorbent with the concentration of the pollutant contained in the solution (Faisal et al, 2014;Asmaa et al, 2010). It is secondly due to the high solubility of phosphates than sulphates.…”

Section: Discolouration Test and Influence Of Adsortion On Other Paramentioning

confidence: 99%

Discolouration Studies of the Slaughterhouse Effluent by Adsorption on Two Adsorbents Made from Species Sawdust of Triplochiton scleroxilon and Milicia excelsa

Djonga

Noubissié

Inna

et al. 2019

EMSD

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The treatment of slaughterhouse effluents is a problem for our municipalities and residents. The objective of this work is to contribute to the protection of the environment through a test treatment of the effluent from the slaughterhouse of cows by adsorption on adsorbents made from sawdust. To achieve this, two adsorbents were produced based on sawdust of Ayous (Triplochiton scleroxilon) and Iroko (Milicia excelsa), and were characterized. The effluent was sampled in a Ngaoundéré slaughterhouse and then characterized in its turn. Finally, discolouration tests by adsorption of this effluent were carried out. At the end of this work, it appears that both adsorbents produced had an acidic character. They are micro and macroporous with specific surface areas from 14.77 m2/g to 69.56 m2/g for Iroko and Ayous, respectively. The effluent from the slaughterhouse of cows sampled in the city of Ngaoundéré is highly conductive and turbid with an organic matter evaluated at 4.15 ± 0.18%. The adsorbent based on sawdust of Ayous is more effective, globally allowed the reduction of more than 70% of all the organic and inorganic loads of the slaughterhouse effluent after treatment. A discolouration rate estimated at more than 90% obtained at the scale of the laboratory, these adsorbents are effective for the treatment of the slaughterhouse effluents. These two adsorbents can therefore be used for the treatment of slaughterhouse effluent in any country in the world.

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Élimination du colorant basique « Bleu de Méthylène » en solution aqueuse par l’argile de Safi

Cited by 21 publications

References 15 publications

An efficient recyclable magnetic material for the selective removal of organic pollutants

An efficient recyclable magnetic material for the selective removal of organic pollutants

Removal Properties, Mechanisms, and Performance of Methyl Green from Aqueous Solution Using Raw and Purified Sejnane Clay Type

Discolouration Studies of the Slaughterhouse Effluent by Adsorption on Two Adsorbents Made from Species Sawdust of Triplochiton scleroxilon and Milicia excelsa

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