Adsorption of Ferricyanide Ion onActivated Carbon and γ‐Alumina

Mbadcam, Joseph Ketcha; Wouaha, G. F. Tchatat; Gomdje, V. Hambate

doi:10.1155/2010/645479

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…According to these results, the adsorption isotherms are in agreement with the Langmuir and Tempkin models for the NAT, whereas the Freundlich and Tempkin models agree well for the SYNTH. The values of 1/n are lower than 1 for both adsorbents, thus the adsorption surface are heterogeneous [23]. The experimental data follow the Tempkin model, and the adsorption energies are lower than 20 kJ/mol which lead to multilayer formation on both adsorbents [24].…”

Section: Adsorption Isothermmentioning

confidence: 73%

Kinetics and equilibrium studies of the adsorption of nickel (II) ions from aqueous solution onto modified natural and synthetic iron oxide

Adolphe

Merlain²,

Blaise³

et al. 2015

IJBAS

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The present paper reports on the kinetic and equilibrium studies of the adsorption of Nickel(II) ions from aqueous solution onto modified natural iron oxide (NAT) from Mbalam (East Region of Cameroon) and synthetic iron oxide (SYNTH). The parameters investigated using batch techniques include, the contact time, adsorbent mass, pH and initial metal ion concentration. The experimental results obtained showed that, the optimum pH of 6 for bothadsorbents with an equilibrium time of 30 minutes was sufficient. The kinetic data correlated well with the pseudo-first-order and pseudo-second-order kinetic models for both the adsorbents based on the correlation coefficients (R 2 ) obtained. The adsorption processes followed both the Langmuir and the Tempkin adsorption models for the natural iron oxide, whereas the Freundlich and Tempkin adsorption models fitted well the adsorption data for the synthetic iron oxide. The maximum quantity of Nickel(II) ions adsorbed was 250 mg/g for the two adsorbents. These results revealed a high adsorption capacity of natural iron oxide which is comparable to that of synthetic iron oxide.

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Section: Adsorption Isothermmentioning

confidence: 73%

Kinetics and equilibrium studies of the adsorption of nickel (II) ions from aqueous solution onto modified natural and synthetic iron oxide

Adolphe

Merlain²,

Blaise³

et al. 2015

IJBAS

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show abstract

“…Many toxic cations (Co 2+ , Zn 2+ , Pb 2+ , Cd 2+ , Sc 2+ , U 2+ , Sr 2+ ), and anions ( 4 AsO − , 2 4 CrO − , 2 4 PO − , 2 3 CO − ), are removed by using various phases of iron oxides [26]. The adsorption properties of iron oxides are due to a combination of both surface complexation by inner or outer sphere bonding with adsorbate [27], and ion exchange by van der Waals forces.…”

Section: Introductionmentioning

confidence: 99%

Synthesized Goethite and Natural Iron Oxide as Effective Absorbents for Simultaneous Removal of Co(II) and Ni(II) Ions from Water

Nangah¹,

Merlain²,

Nsami³

et al. 2019

JEAS

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This study reports on the adsorption efficiency of a natural iron oxide from Mballam-Cameroon in comparison with synthesized goethite to simultaneously remove cobalt and nickel ions from aqueous solutions. Chemical analysis on the natural iron oxide sample revealed iron as the main element and hematite (58.52%) goethite (19.42%), kaolinite (12.69%) and quartz (7.79%) as the component phases in the iron oxide sample. The iron oxide was found to be microporous (BET surface area 43.27 m 2 /g) with fairly spherical polydisperse particles. Results show maximum absorption for Co(II) and Ni(II) ions for both adsorbents occurred at an equilibrium contact time of 80 mins, dose rate of 0.1 g/L, and pH = 7. Goethite was slightly more efficient at removing target metal ions with maximal adsorbed quantities at 117.8 mg/g of Co(II) and 100.6 mg/g of Ni(II), and 103.9 mg/g of Co(II) and 85.2 mg/g of Ni(II) ions for natural iron oxide. Equilibrium modelling presented the Freundlich isotherm as the best fit model for both adsorbents and metal ions, indicating heterogeneity of the surface binding sites during adsorption. The pseudo-second order kinetic model was the best-fit model, indicating chemical adsorption between the adsorbent surface and metal ions, hence a good correlation between equilibrium and kinetics. The findings indicate that the efficacy of the natural iron oxide from Mballam is almost equivalent to that of synthetic goethite, validating its applicability for the simultaneous removal of cobalt and nickel ions from aqueous solution.

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Mechanical polishing as an improved surface treatment for platinum screen-printed electrodes

Lee

Arrigan

Silvester

2016

Sensing and Bio-Sensing Research

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Adsorption of Ferricyanide Ion onActivated Carbon and γ‐Alumina

Cited by 4 publications

References 18 publications

Kinetics and equilibrium studies of the adsorption of nickel (II) ions from aqueous solution onto modified natural and synthetic iron oxide

Kinetics and equilibrium studies of the adsorption of nickel (II) ions from aqueous solution onto modified natural and synthetic iron oxide

Synthesized Goethite and Natural Iron Oxide as Effective Absorbents for Simultaneous Removal of Co(II) and Ni(II) Ions from Water

Mechanical polishing as an improved surface treatment for platinum screen-printed electrodes

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