Comparative sorption kinetic studies of phenolic compounds on fly ash and impregnated fly ash

Singh, B. K.; Rawat, N.S.

doi:10.1002/jctb.280610109

Cited by 89 publications

(64 citation statements)

References 17 publications

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“…However, in the case of the sorption of Acid Brilliant Blue, Direct Red 12 B, chromium(VI) and lead(II) onto biogas residual slurry 35,44 46 , the rate constant is dependent on concentration and particle size. For the sorption of phenolic compounds on¯y ash and impregnated¯y ash 39 the rate constant is dependent on concentration and temperature. Diffusional mass transport models applied to sorption systems have not been reviewed in this paper, but their role is extremely important particularly in processes where ion exchange and ionic bonding are not as prevalent as in chemisorption processes.…”

Section: Analysis Of Data From the Literaturementioning

confidence: 99%

A Comparison of Chemisorption Kinetic Models Applied to Pollutant Removal on Various Sorbents

McKay

1998

Process Safety and Environmental Protection

2,077

898

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A comparison of kinetic models describing the sorption of pollutants has been reviewed. The rate models evaluated include the Elovich equation, the pseudo-® rst order equation and the pseudo-second order equation. Results show that chemisorption processes could be rate limiting in the sorption step. The pseudo-second order equation may be applied for chemisorption processes with a high degree of correlation in several literature cases where a pseudo-® rst order rate mechanism has been arbitrarily assumed.

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Section: Analysis Of Data From the Literaturementioning

confidence: 99%

A Comparison of Chemisorption Kinetic Models Applied to Pollutant Removal on Various Sorbents

McKay

1998

Process Safety and Environmental Protection

2,077

898

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“…The amount of phenol adsorbed shows a declining trend with higher as well as with lower pH, with maximum removal of phenol (up to almost 100 % by both the adsorbents) at neutral pH (Figure 2). This reduction of phenol-sorption may be because of the suppression by hydrogen ions (at lower pH), and hydroxyl ions (at higher pH) in addition to formation of various phenolic compounds at both acidic and alkaline conditions [16,17]. Figure 3 shows the effect of contact time on the removal of phenol by HIC and CAC.…”

Section: Effect Of Ph On Phenol Adsorptionmentioning

confidence: 99%

Adsorption of Phenol From Aqueous Media by an Agro-Waste (Hemidesmus Indicus) Based Activated Carbon

Srihari¹

2009

Appl Ecol Env Res

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Abstract. The adsorption of phenol by an agro-waste based activated carbon prepared from the root residue of Hemidesmus Indicus (HIC) was investigated to assess its possible use as adsorbent. The effect of various factors, namely, pH, initial adsorbate concentration, adsorbent dosage and contact time were studied to identify adsorption capacity of HIC. The results were compared to that obtained from adsorption of phenol by commercial activated carbon (CAC). Adsorption data were modeled with the Langmuir and Freundlich isotherms. The kinetic models were also applied for the pseudo-first-order, pseudo-second-order, intra-particle diffusion and pore diffusion coefficients. Although HIC and CAC showed much similar isotherm models and kinetics, yet HIC was found to show much higher boundary layer effect and pore-diffusion coefficients, in relation to CAC.

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“…However, commercially available activated carbons are very expensive [7][8][9]. Therefore, studies are now focusing on new natural adsorbents with low cost and local availability, such as chitosan, bentonite, zeolite, clay minerals, olive mill residue, flay ashes, coal, rice husk, waste tea leaves, peanut hull pellets and bio sorbents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Nano-Activated Carbon from El Maghara Coal, Sinai, Egypt to be Utilized for Wastewater Purification

Elkady¹

2015

AJAC

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Abstract:This study targeted to evaluate the availability of extraction the nano-activated carbon from el maghara coal that represents as Jurassic coal deposits in the Maghara area, Sinai, Egypt to be utilized as adsorbent material for methyl orange dye decontamination from polluted wastewater. Nano-activated carbon was prepared through the alkaline and acidic activation of el maghara coal with potassium hydroxide and phosphoric acid respectively at different conditions such as activation temperature, activation time and activating agent/ carbon ratio. The maximum removal for methyl orange with the extracted nano-activated carbon was recorded to be 90%. This efficient nano-activated carbon was synthesized through the reaction of el maghara coal with potassium hydroxide with 1:2 weight ratios for 90 minutes. Then the yielded powder material was carbonized at 600ºC for 90 minutes. The physical and chemical characteristics of raw coal and the most efficient extracted nano-activated carbon material were examined using different techniques such as scanning electron microscopic and infrared spectroscopy analysis. The different factors affecting the methyl orange treatment process onto the most efficient prepared material will be optimized using the batch technique. The equilibrium time for dye sorption process onto the prepared nano-activated carbon was established at 120min. the improvement at both the agitation speed and the material dosage has positive effect on the dye sorption process. The maghara coal was establish to be suitable resource for Nano-ctivated carbon extraction as an adsorbent after alkaline and thermal activation of the raw el maghara coal for the removal of methyl orange dye from polluted industrial wastewater.

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Comparative sorption kinetic studies of phenolic compounds on fly ash and impregnated fly ash

Cited by 89 publications

References 17 publications

A Comparison of Chemisorption Kinetic Models Applied to Pollutant Removal on Various Sorbents

A Comparison of Chemisorption Kinetic Models Applied to Pollutant Removal on Various Sorbents

Adsorption of Phenol From Aqueous Media by an Agro-Waste (Hemidesmus Indicus) Based Activated Carbon

Synthesis and Characterization of Nano-Activated Carbon from El Maghara Coal, Sinai, Egypt to be Utilized for Wastewater Purification

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