Elimination des colorants acides en solution aqueuse par la bentonite et le kaolin

Benguella, Belkacem; Yacouta-Nour, Aïcha

doi:10.1016/j.crci.2008.11.008

Cited by 51 publications

(33 citation statements)

References 17 publications

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“…The increase in methyl orange adsorption with the increase in adsorbent mass is attributed to increase in surface area of micro pores and the increase in availability of vacant adsorption sites. Similar results have been reported for the adsorption of methyl orange on Algerian MMT [18][19][20].…”

Section: Effect Of Adsorbent Masssupporting

confidence: 78%

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Removal of Anionic Dye by Natural Algerian Montmorillonite

Djelloul¹,

D²,

BASSOU³

2015

J Environ Anal Chem

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Section: Effect Of Adsorbent Masssupporting

confidence: 78%

“…Furthermore, values of 1/n were between zero and one, which indicates that Algerian MMT is favourable for the adsorption of MO Benguella and Yacouta-Nour [18] Jiang et al…”

Section: Adsorption Isotherms and Modelsmentioning

confidence: 99%

Removal of Anionic Dye by Natural Algerian Montmorillonite

Djelloul¹,

D²,

BASSOU³

2015

J Environ Anal Chem

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“…Due to the low-cost and large availability, the use of clays like kaolin becomes the adsorption process an attractive and promising technology. Although there are several works in literature reporting the removal of different classes of dyes onto kaolin [41][42][43][44] , no studies were found reporting the application of a natural kaolin sample from the Rio Grande do Sul State (Brazil) for the removal of Malachite Green dye.…”

Section: Introductionmentioning

confidence: 99%

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

et al. 2017

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This study investigated the potential of Brazilian kaolin as a low-cost adsorbent for the removal of Malachite Green (MG) from colored effluents. The morphology, chemical structure and surface properties of the adsorbent were investigated by characterization techniques such as X-ray diffraction, N2 adsorption-desorption isotherms, Fourier transform infrared spectroscopy, X-ray fluorescence spectrometry, scanning electron microscopy, thermogravimetric analysis and particle size distribution. A possible technological application of raw kaolin is the MG removal from aqueous media, which was investigated using batch adsorption experiments. The adsorption kinetics was studied using the pseudo-first order, pseudo-second order and Elovich models. The adsorption isotherms were studied using the Langmuir, Freundlich and Sips models. The Elovich model was the more adequate to represent the adsorption kinetic, while the equilibrium was well represented by the Langmuir model. The maximum adsorption capacity, at pH of 6.3 and temperature of 25ºC, was 128 mg g -1 , and this satisfactory result may be associated with some adsorbent properties. Therefore, the results revealed that raw kaolin can be utilized as a promising low-cost adsorbent to remove MG from colored effluents.

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“…One difficulty encountered when using coagulation/flocculation agents during the physicochemical step occurs when particle flakes do not settle properly, rendering the system unable to remove dyes from water (El Kbir et al 1998). Furthermore, biological processes are relatively less effective (Gerçel et al 2008;Benguella and Yacouta-Nour 2009;Srinivasan and Viraraghavan 2010).…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of azo dyes from aqueous solutions by natural bentonite under static and dynamic flow conditions

Berez

Schäfer

Ayari

et al. 2016

Int. J. Environ. Sci. Technol.

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This work reports new findings on the physisorption of Foron Blue 291 on natural bentonite under both static and dynamic flow conditions of the aqueous solution that may prove important when using the adsorption technique for wastewater treatment. The quantity of dye retained by the solid matrix under both ideal exchange conditions between dyes and adsorbents given in a batch reactor and a pulse injection of dissolved azo dye in a soil column composed of a mixture of mean grain-sized sand and bentonite at different flow rates and at various mass fractions of bentonite was studied. Column experiments involving the use of a non-reactive tracer (Fluorescein) were performed to examine hydrodynamic behaviours of the clay/sand mixture studied. It is shown that advective-dispersive transport across a clay/sand mixture may be characterized by a double porosity medium. The results obtained on the reactive transport of Foron Blue 291 underscore that Foron Blue 291 adsorption depends heavily on the mass fraction of clay in a clay/sand mixture. With a clay mass fraction of 30 %, 77 % of the dissolved Foron Blue 291 mass was irreversibly removed by the adsorbent. At low flow rates, removal ratios obtained from the dynamic reactive system were similar to those obtained through previous static reactor experiments.

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Elimination des colorants acides en solution aqueuse par la bentonite et le kaolin

Cited by 51 publications

References 17 publications

Removal of Anionic Dye by Natural Algerian Montmorillonite

Removal of Anionic Dye by Natural Algerian Montmorillonite

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

Adsorptive removal of azo dyes from aqueous solutions by natural bentonite under static and dynamic flow conditions

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