Comparison of two Algerian bentonites: Physico-chemical and retention capacity study

Arbaoui, Fahd; Boucherit, Mohamed Nadir

doi:10.1016/j.clay.2014.02.001

Cited by 20 publications

(8 citation statements)

References 18 publications

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“…The appearance of a series of characteristic peaks confirms that Maghnite is composed essentially by montmorillonite fraction ( Table 1). The characterization measurements [26,[30][31] show that Maghnite is an aluminosillicate montmorillonite clay with the basic repeating unit of…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

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A New Green Catalyst for Synthesis of bis-Macromonomers of Polyethylene Glycol (PEG)

Haoue¹,

Derdar²,

Belbachir³

et al. 2020

ChChT

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A new method to synthesise polyethylene glycol dimethacrylate (PEGDM) with various molecular weights (1000, 3000, 6000 and 8000 g/mol) of polyethylene glycol (PEG) has been developed. This technique consists in using Maghnite-H+ as eco-catalyst to replace еriethylamine, which is toxic. Maghnite-H+ is a proton exchanged montmorillonite clay which is prepared through a simple exchange process. Synthesis experiments are performed in solution using dichloromethane as solvent in the presence of methacrylic anhydride. The effect of reaction time, temperature, amount of catalyst and amount of methacrylic anhydride is studied in order to find the optimal reaction conditions. The synthesis in solution leads to the best yield (98 %) at room temperature for the reaction time of 5 h. The structure of the obtained macromonomers (PEGDM) is confirmed by FTIR, 1H NMR and 13C NMR, where the methacrylate end groups are clearly visible. Thermogravimetric analysis (TGA) is used to study the thermal stability of these obtained macromonomers. The presence of unsaturated end group was confirmed by UV-Visible analysis.

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Section: Characterization Of the Catalystmentioning

confidence: 99%

“…Maghnite-H + is acidified Algerian montmorillonite clay. It exhibits a high cationic exchange capacity (CEC = = 91 meq/100g) [26] and good efficiency for cationic polymerization of vinylic and heterocyclic monomers [27][28][29][30][31] and presents the advantage to be non-toxic, ecologic, economic, and regenerable by simple filtration.…”

Section: Introductionmentioning

confidence: 99%

A New Green Catalyst for Synthesis of bis-Macromonomers of Polyethylene Glycol (PEG)

Haoue¹,

Derdar²,

Belbachir³

et al. 2020

ChChT

View full text Add to dashboard Cite

show abstract

“…Christidis, Dunham 1993;Christidis, Dunham 1997;Arslan et al 2010;Koutsopoulou et al 2016). Moreover, they seem to be quite similar to commercially appreciated bentonites from Algeria (see Arbaoui, Boucherit 2014).…”

Section: Introductionmentioning

confidence: 99%

Bentonite from the Central Slovakia Volcanic Field – A Prospective Raw Material for Polish Industry

et al. 2017

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Abstract. This paper summarizes information about recently worked bentonite deposits in Slovakia and presents the results of studies on bentonite from the Central Slovakia Volcanic Field (CSVF). The authors compared the mineralogy of commercial bentonites exploited in the Stara Kremnička (Jelšový potok), Kopernica, and Hliník nad Hronom deposits. X-ray diffraction (XRD), chemical analyses and microscopy showed that the main component is montmorillonite (37-88%), followed by opal C/CT (5-25%), clinoptilolite (up to 15%), feldspars (3-12%), quartz (up to 8%), biotite (2-5%), and kaolinite (up to 2%). The microscopic imaging provided information valuable for the technological assessment of bentonites, particularly the evaluation of mineralogy determined by XRD. The low variability of the mineral composition of commercial bentonites exploited in the western CSVF, together with the significant reserves and localization of deposits close to the Polish-Slovak state border prove that this raw material deserves more attention from Polish industry.

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“…Due to their adsorption abilities and catalytic activities, natural clays have been widely used as adsorbents and catalyst supports. Bentonite is a clay mineral, the main component of which is montmorillonite [20,21]. Due to its unique structure, bentonite has good mechanical properties, high thermal stability and acid and alkali resistance, large surface area, and other favorable characteristics.…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of Methylene Blue by TiO₂-Fe₃O₄-Bentonite Magnetic Nanocomposite

Chen

Xiao

et al. 2015

International Journal of Photoenergy

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Fe3O4-bentonite nanoparticles have been prepared by a coprecipitation technique under a nitrogen atmosphere. An aqueous suspension of bentonite was first modified with FeCl2and FeCl3. TiO2was then loaded onto the surface of theFe3O4-bentonite by a sol-gel method. After sufficient drying, the colloidal solution was placed in a muffle furnace at 773 K to obtain theTiO2-Fe3O4-bentonite composite. The material has been characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and vibrating sample magnetometry (VSM). Morphological observation showed thatFe3O4and TiO2nanoparticles had been adsorbed on the surface of bentonite nanoneedles. The material was then applied for the photodegradation of the azo dye methylene blue (MB). It was found that the removal efficiency of MB exceeded 90% under UV illumination, and that only a 20% mass loss was incurred after six cycles. The composite material thus showed good photocatalytic performance and recycling properties.

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Comparison of two Algerian bentonites: Physico-chemical and retention capacity study

Cited by 20 publications

References 18 publications

A New Green Catalyst for Synthesis of bis-Macromonomers of Polyethylene Glycol (PEG)

A New Green Catalyst for Synthesis of bis-Macromonomers of Polyethylene Glycol (PEG)

Bentonite from the Central Slovakia Volcanic Field – A Prospective Raw Material for Polish Industry

Photodegradation of Methylene Blue by TiO₂-Fe₃O₄-Bentonite Magnetic Nanocomposite

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Comparison of two Algerian bentonites: Physico-chemical and retention capacity study

Cited by 20 publications

References 18 publications

A New Green Catalyst for Synthesis of bis-Macromonomers of Polyethylene Glycol (PEG)

A New Green Catalyst for Synthesis of bis-Macromonomers of Polyethylene Glycol (PEG)

Bentonite from the Central Slovakia Volcanic Field – A Prospective Raw Material for Polish Industry

Photodegradation of Methylene Blue by TiO2-Fe3O4-Bentonite Magnetic Nanocomposite

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Product

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Photodegradation of Methylene Blue by TiO₂-Fe₃O₄-Bentonite Magnetic Nanocomposite