Adsorption of chromium by activated carbon from aqueous solution

Aggarwal, Diksha; Goyal, Meenakshi; Bansal, Ranju

doi:10.1016/s0008-6223(99)00072-x

Cited by 227 publications

(137 citation statements)

References 9 publications

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“…Hu et al (2003) reported Cr(VI) sorptive capacity in the range of 30-40 mg/g for three different commercial activated carbon at equilibrium Cr(VI) concentration of 3-10 mg/l at pH 3. Granulated activated carbon and fibrous activated carbon have approximately 10 mg/g of Cr(VI) at equilibrium Cr(VI) concentration of 35 mg/l (Aggarwal et al, 1999). Lotfi and Adhoum (2002) have reported a Cr(VI) removal capacity of 6.84 mg/g for modified activated carbon (sodium diethyl dithiocarbamate immobilized at the surface), which was almost two times that of plain activated carbon.…”

Section: Comparison With Other Sorbentsmentioning

confidence: 99%

Biosorption of aqueous chromium(VI) by Tamarindus indica seeds

Agarwal¹,

Bhuptawat

Chaudhari

2006

Bioresource Technology

261

101

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Section: Comparison With Other Sorbentsmentioning

confidence: 99%

Biosorption of aqueous chromium(VI) by Tamarindus indica seeds

Agarwal¹,

Bhuptawat

Chaudhari

2006

Bioresource Technology

261

101

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“…Although the last method is probably the most commonly employed, it is very inefficient because a large amount of sludge is produced and the chromium cannot be recovered from the precipitate, making this strategy very expensive (Leyva Ramos et al 1994). On the other hand, adsorption is considered to be an efficient method for removing heavy metals from wastewater (Aggarwal et al 1999;Selvi et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of chromium(VI) onto electrochemically obtained magnetite nanoparticles

Martínez

Muñoz‐Bonilla

Mazarío

et al. 2015

Int. J. Environ. Sci. Technol.

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Well-dispersed magnetite nanoparticles of different sizes between 15 and 43 nm were synthesized by an electrochemical method in a controlled manner by simply changing the synthesis temperature. These nanoparticles were used as a reusable adsorbent to remove Cr(VI) from aqueous solution. The recovery efficiency was found to be highly dependent on environmental parameters, such as temperature and pH. In addition, it was demonstrated that the initial concentrations of both Cr(VI) and magnetite nanoparticles strongly influence the removal capability of these nanomaterials. Remarkably, the nanoparticle size has a key role on the Cr(VI) adsorption efficiency, which gradually increases as the diameter decreases due to the augmentation of the surface area. The low aggregation in the case of small particles that results from the low magnetization saturation values also contributes to the enhancement of the surface area available for Cr(VI) adsorption. In contrast, nanoparticles with larger sizes are more easily manipulated by a magnet, and the efficiency is largely maintained after five cycles. The adsorption process fits the Langmuir isotherm model well, and the reaction was found to follow a pseudo-second-order rate.

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“…Les valeurs de ΔG 0 (valeur absolue) augmentent avec la température, indiquant une spontanéité dans le processus de sorption des ions chromate sur HT et HT-C. Le tableau 4 compare les capacités de sorption du Cr(VI) sur les matériaux utilisés et sur d'autres sorbants (AGGARWAL et al, 1999;BAES et al, 1997;GOSWAMEE et al, 1998;HOURI et al, 1999;LAZARIDIS et ASOUHIDOU, 2003). La conclusion tirée met en évidence le grand pouvoir de sorption de l'hydrotalcite calcinée.…”

Section: Sorption Des Ions Chromateunclassified

Étude des facteurs contrôlant la sorption de Cr(VI) sur une hydrotalcite de synthèse

Bakhti

Ouali

2007

rseau

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La sorption des ions chromate de solutions aqueuses sur une hydrotalcite de synthèse et sur son produit de calcination a été étudiée. L’interaction de ces matériaux avec les ions chromate montre que la cinétique de sorption est rapide et suit une expression de vitesse de sorption réversible du premier ordre. Les influences du pH, de la concentration en ions chromate de la solution et de la température ont été étudiées afin d’optimiser la sorption. Le traitement de solutions contenant de 10 à 200 mg L-1 de Cr(VI) a donné de bons résultats. Les capacités de sorption de ces matériaux sont 1,3 et 2,4 mmol g‑1 de Cr(VI), respectivement. L’étude de la réversibilité de la sorption des ions chromate indique qu’il est possible d’utiliser les hydrotalcites calcinées comme sorbants recyclables. Ceci suggère notamment que ces derniers pourraient constituer d’intéressants supports pour le piégeage d’ions chromate.The sorption of chromate ions from aqueous solutions onto a synthetic hydrotalcite and its calcination product was investigated. The interaction of these materials with chromate ions shows that the kinetics of sorption are fast and follow a first-order reversible model. The effects of pH, chromate ion concentration and temperature on the sorption were studied. Solutions containing from 10 to 200 mg L‑1 of Cr(VI) were successfully treated. The sorption capacities of these materials are approximately 1.3 and 2.4 mmol CrO42-, per g, for the hydrotalcite and its calcination product, respectively. The reversibility of the sorption of chromate ions suggests the possible use of the calcined hydrotalcites as recyclable sorbents, which may constitute useful supports for trapping chromate ions

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Adsorption of chromium by activated carbon from aqueous solution

Cited by 227 publications

References 9 publications

Biosorption of aqueous chromium(VI) by Tamarindus indica seeds

Biosorption of aqueous chromium(VI) by Tamarindus indica seeds

Adsorption of chromium(VI) onto electrochemically obtained magnetite nanoparticles

Étude des facteurs contrôlant la sorption de Cr(VI) sur une hydrotalcite de synthèse

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