Removal of sugar colorants by granular activated carbons made from binders and agricultural by-products

Pendyal, B.; Johns, Mitchell M.; Marshall, Wayne E.; Ahmedna, Mohamed; Rao, R. Shyama Prasad

doi:10.1016/s0960-8524(98)00172-2

Cited by 53 publications

(21 citation statements)

References 11 publications

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“…In the adsorption process of fatty acids on activated carbon, montmorillonite and HDTMA-montmorillonite, it 3 was obtained a complete quantification of the experimental values, it was verified that the adsorption capacity decreased with the temperature and increased with initial concentration of acids in solution. These behaviors were expected because the adsorption process was exothermic and an increase in the driving force allowed more molecules of solute to transfer from the liquid phase to the solid surface.…”

Section: Discussionmentioning

confidence: 68%

“…Other factors that can affect the adsorption in a significant way are the granulometric distribution, ash content, high mechanical resistance, the activation process to which the carbon was submitted [2,3], viscosity [29], temperature of the liquid phase [1,11,22,24], contact time of the adsorbent with the solution [1,18,22,24,28], and solubility of the adsorbate [5].…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic study of fatty acids adsorption on different adsorbents

Freitas

Mendes

Coelho

2007

The Journal of Chemical Thermodynamics

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Section: Discussionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Thermodynamic study of fatty acids adsorption on different adsorbents

Freitas

Mendes

Coelho

2007

The Journal of Chemical Thermodynamics

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“…The by-products include soft lignocellulosics such as rice straw, soybean hull, sugarcane bagasse, peanut shell and harder materials such as pecan and walnut shells (3), ( 4) . AC is prepared and activated by various methods, including thermally and chemically, with acids and various salts.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Metals (Fe(II) , Cr(III) and Co(II)) from Aqueous Solution by Using Activated Carbon Prepared from Mesquite Tree

Hamza¹

2013

SJAC

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Abstract:Mesquite tree was use to prepare activated carbon through chemical activation method with 1 M KOH and under temperature of 600 0 C for 1 hr , the product of the activated was examined for its proximate composition ; ash content (3.9%) , moisture content (3%), carbon content (40.65%) , volatile matter (25.65%) , porosity (54.95%) , iodine number of 13.22 and methylene blue value of 166.6 mg/g. XRF study on activated carbon prepared from Mesquite tree (ACM)shows different concentration of inorganic elements the major elements in the sample are Potassium (0.301%) ,Calcium (0.357%),Zinc(0.01366%) and Ferrous (0.687%).XRD analysis showed the presence of highly organized crystalline structure of raw activated carbon for ACM sample , Carbon with crystalline structure of Rhombohedral and Carbon Supplied with crystalline structure Orthorhombic and Cubic were detected. The result showed a strong and broad adsorption peak at 1577.66 cm -1 , which corresponds to the lactone in ACM sample. While other strong and broad adsorption peak appeared at 1340 cm -1 , which corresponds to the Phenol Aliphatic CH 2 and CH 3 was observed at 2920 cm , Cr 3+ and Co 2+ from aqueous solution has also been investigated. The adsorption process was carried out in isothermal container at 30 O C. the effect of dose of activated carbon prepared from the sample on percentage removal metals indicate that the maximum dose of adsorbent was at concentration of 0.8 g/l for sample , The contact time was in 80 min for the samples . The adsorption decreased as the pH increase the optimum pH for the adsorption was attended at 6 for ,the experimental isotherm data were analyzed using Freundlich equations. The adsorption process follows the Freundlich order kinetic, having a correlation coefficient (R 2 ) of 0.

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“…The removal of colorants from sugar juices is considered to be an important application of adsorption process using inexpensive sorption materials. Among the low cost adsorbents, activated carbons derived from various agricultural byproducts (Ahmedna et al 1997(Ahmedna et al , 2000aPendyal et al 1999;Mudoga et al 2008), and inorganic materials such as bentonite, sepiolite, diatomite, montmorillonite, organic clays (Erdogan et al 1996;Unal and Erdogan 1998;Jaruwong and Kiattikomol-Wibulswas 2003) have been investigated for sugar decolorization.…”

Section: Introductionmentioning

confidence: 99%

A study on cations and color removal from thin sugar juice by modified sugar beet pulp

Arslanoğlu

Tümen

2011

J Food Sci Technol

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This article describes the use of citric acid modified sugar beet pulp as new ion-exchanger sorbent for the removal of metal cations and colorants from thin juice. The results of batch adsorption runs concerning the effects of contact time, material dosage, temperature and pH drop were presented and discussed. Experimental data on the removal of metal cations showed that the sorption process was rapid and reached equilibrium in 60 min. Modified material in acidic form caused to a significant pH drop in thin juice, which could result with sucrose inversion. Uptake of metal cations increased with temperature whereas that of color decreased. Neutralised type modified product gave more satisfying results. After six successive contacts, 49.7%, 37.5% and 43.7% removals for Ca-Mg, K and color, respectively, were obtained by using neutralised form of modified sugar beet pulp.

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Removal of sugar colorants by granular activated carbons made from binders and agricultural by-products

Cited by 53 publications

References 11 publications

Thermodynamic study of fatty acids adsorption on different adsorbents

Thermodynamic study of fatty acids adsorption on different adsorbents

Adsorption of Metals (Fe(II) , Cr(III) and Co(II)) from Aqueous Solution by Using Activated Carbon Prepared from Mesquite Tree

A study on cations and color removal from thin sugar juice by modified sugar beet pulp

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