Regeneration of spent bleaching earth by treatment with cethyltrimethylammonium bromide for application in elimination of acid dye

Mana, M.; Ouali, Mohand Saïd; Menorval, L. C. De; Zajac, Jurek; Charnay, Clarence

doi:10.1016/j.cej.2011.09.026

Cited by 32 publications

(6 citation statements)

References 15 publications

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“…15 The rening process for crude palm oil usually includes three operations: degumming, bleaching and deodorization. 16 The bleaching process is the most crucial step, which is realized by the use of activated clay at a dosage of 1-3%, and then the activated clay will become the spent bleaching earth (SBE) aer bleaching, which contains about 10-21% normal grease. Therefore, it is a rational and feasible strategy to prepare clay mineral/carbon composites using the residual organic matter of the spent bleaching earth as a cheap carbon precursor.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of attapulgite/carbon composites from spent bleaching earth for the efficient adsorption of methylene blue

Tang

Zong

et al. 2015

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Fabrication of attapulgite/carbon composites from spent bleaching earth for the efficient adsorption of methylene blue

Tang

Zong

et al. 2015

RSC Adv.

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“…The intercalation of surfactant changes the surface of the clay from hydrophilic to hydrophobic [9] and makes clay compatible with hydrophobic polymers. Moreover, it increases the interlayer distance to allow the polymer enters the interlayer.…”

Section: Modification and Characterization Of Organ Bentonitementioning

confidence: 99%

The effect of organobentonites from spent bleaching earth (SBE) and commercial bentonite on nanocomposite properties

Paramith

Sitompul

Lee

2018

IJET

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This paper concerns on synthesis of nanocomposites consisting of Poly(lactic acid) (PLA) and clays. Two types of clays were regenerated organobentonite and commercial organobentonite. PLA and clays were melt extruded using single-screw extruder. The extruded compound was pelletized, then hot pressed using compression molding machine. Regenerated organobentonite was obtained from regeneration of spent bleaching earth (SBE) using solvent extraction and oxidation method. Afterwards, regenerated SBE modified by organic compound. While, commercial organobentonite was directly modified of commercial bentonite using organic compound. In this study, nanocomposites were prepared with varying compositions of clays from 0% to 5% (by weight). Experimental results show that partially exfoliated nanocomposites structure was shown by X-ray diffraction analyses. In addition, the effect of clays on morphology structure, mechanical, barrier, and biodegradable properties were analyzed. The utilization of clays in nanocomposite increases mechanical properties at low clay compositions. Furthermore, PLA-clay nanocomposites show better barrier and biodegradable properties compared to that of the neat PLA.

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“…However, crude palm oil is reddish in color due to high beta-carotene content, and there are hazardous impurities, such as peroxide, phospholipids, and others. Therefore, palm oil must be decolored before use to improve the color and quality of the oils [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon/Attapulgite Composites as Recycled Palm Oil-Decoloring and Dye Adsorbents

et al. 2018

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Activated clay minerals have been widely used in the edible oil refining industry for decolorization of crude oil by adsorption, and so far many methods have been used to improve their decolorization efficiency. Herein, we successfully prepared a series of carbon/attapulgite (C/APT) composite adsorbents by a one-step in-situ carbonization process with natural starch (St) as the carbon source. It has been revealed that the adsorbent had better decolorization efficiency for crude palm oil than acid-activated APT. However, more than a million tons of decolorized waste is produced every year in the oil-refining industry, which was often treated as solid waste and has not yet been reutilized effectively. In order to explore a viable method to recycle and reuse the decolorant, the waste decolorant was further prepared into new C/APT adsorbents for the removal of dyes from wastewater, and then the dyes adsorbed on the adsorbent were used as the carbon sources to produce new C/APT adsorbents by a cyclic carbonization process. The results showed that the adsorbents prepared from the decolorized waste could remove more than 99.5% of the methylene blue (MB), methyl violet (MV), and malachite green (MG) dyes from the simulated wastewater with the dye concentration of 200 mg/L, and the C/APT–Re adsorbent consecutively regenerated five times using the adsorbed dyes as a carbon source still exhibit good adsorption efficiency for dyes. As a whole, this process opens a new avenue to develop efficient decolorants of palm oil and achieves recyclable utilization of decolored waste.

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Regeneration of spent bleaching earth by treatment with cethyltrimethylammonium bromide for application in elimination of acid dye

Cited by 32 publications

References 15 publications

Fabrication of attapulgite/carbon composites from spent bleaching earth for the efficient adsorption of methylene blue

Fabrication of attapulgite/carbon composites from spent bleaching earth for the efficient adsorption of methylene blue

The effect of organobentonites from spent bleaching earth (SBE) and commercial bentonite on nanocomposite properties

Carbon/Attapulgite Composites as Recycled Palm Oil-Decoloring and Dye Adsorbents

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