Study of the adsorption of phenol by two soils based on kinetic and isotherm modeling analyses

Balaji, S.; Das, Ashutosh

doi:10.1016/j.desal.2009.05.020

Cited by 68 publications

(29 citation statements)

References 32 publications

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“…On the other hand, with increased of C o , the β-values showed a reduction trend (45.236 to 2.762 g/mg). Thus, 1/β (which is apparently indicative of the number of sites available for adsorption, as per the second assumption) showed a distinct increase with an increase in concentration, again reinforcing the occurrence of chemisorptions [40].…”

Section: The Elovich Kineticsmentioning

confidence: 94%

Removal of Copper from Water by Adsorption onto Banana Peel as Bioadsorbent

Hossain¹

2012

geomate

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Banana peel, a fruit waste were used to produce bioadsorbent through environment friendly process. It were cut, washed, dried, grounded into powder and used for copper removal. Copper adsorption onto banana peel was depended upon the controlling parameters such as particle size, doses, pH, contact time, agitation speed and temperature. Slightly acidic water (pH = 6) was found to be suitable for copper removal. Equilibrium data were well fitted (R 2 = 0.998) with the Langmuir and Freundlich isotherms. The monolayer adsorption capacity was 27.78 mg/g. The calculated R L and 'n' values has proved the favorability of copper adsorption onto banana peel. Copper adsorption was followed the second order kinetic properly rather than other models. The equilibrium adsorption capacity was 1. 439, 8.849, 18.182, 31.250 and 71.429 mg/g when initial copper concentrations were 10, 50, 100, 200, and 400 mg/l respectively. Solvent 0.1N Sulphuric acid showed higher desorption of copper (94%) and adsorption-desorption process can be continued till seven cycles efficiently.

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Section: The Elovich Kineticsmentioning

confidence: 94%

Removal of Copper from Water by Adsorption onto Banana Peel as Bioadsorbent

Hossain¹

2012

geomate

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“…This equation at the higher concentrations of adsorbate is converted to the Freundlich isotherms and because of its multifunctional property, it can be used in either homogenous or heterogeneous systems (Gimbert et al 2008;Subramanyam and Das 2009). Redlich-Peterson isotherm can be described as follows: and in the case of g = 0, it is converted to Henrys' equation.…”

Section: Redlich-peterson Isothermmentioning

confidence: 99%

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Ghorbani-Khosrowshahi

Behnajady

2016

Int. J. Environ. Sci. Technol.

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In this research, the stems of Onopordom Heteracanthom which is a kind of weed were converted to biochar particles, and their characteristics were investigated. The morphology and purity of these particles were examined by SEM and EDX techniques, respectively. Specific surface area was obtained as 5.73 m 2 g -1 by BET method. The biochar particles obtained from Onopordom Heteracanthom were evaluated as an adsorbent to remove Cr(VI) from aqueous environments. The effect of some parameters such as initial concentration of Cr(VI), dosage of adsorbent, and pH were investigated on the adsorption capacity of Cr(VI) onto the adsorbent. The equilibrium data were analyzed by various isotherm models. The results revealed that in this process, the adsorption isotherm and kinetics have more conformity with Langmuir isotherm and pseudo-second-order kinetics, respectively. The multilinearity of the Weber and Morris adsorption kinetic model indicates that the intra-particle diffusion is not merely the rate-controlling step for the whole adsorption process.

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“…When the adsorbate concentration is low, this isotherm reduces to Freundlich isotherm, and when the adsorbate concentration is high, this isotherm reduces to Langmuir isotherm 25 . This model is based on the following equation:…”

Section: Sips Isothermmentioning

confidence: 99%

Sol-Gel Synthesis of NiO Nanoparticles and Investigation on Adsorption Capacity in the Removal of Cr(VI) from Aqueous Solution

Ashan¹,

Ziaeifara²,

Khosravi³

2016

Orient. J. Chem

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In this study, the NiO nanoparticles were synthesized by sol-gel method, and their physicochemical properties were investigated through XRD, SEM-EDX, TEM, and BET-BJH. The TEM results showed that average nanoparticles size was smaller than 10 nm and that there was a good agreement between the TEM and XRD results. The results indicate that NiO nanoparticles are efficient adsorbent for the removal of Cr(VI) from aqueous solutions. The effects of adsorbent, adsorbate concentration, and pH were examined. The equilibrium data could be well described by Sips model. The results of adsorption kinetics study indicated that kinetics obeyed pseudo-second order kinetic model.

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Study of the adsorption of phenol by two soils based on kinetic and isotherm modeling analyses

Cited by 68 publications

References 32 publications

Removal of Copper from Water by Adsorption onto Banana Peel as Bioadsorbent

Removal of Copper from Water by Adsorption onto Banana Peel as Bioadsorbent

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Sol-Gel Synthesis of NiO Nanoparticles and Investigation on Adsorption Capacity in the Removal of Cr(VI) from Aqueous Solution

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