Removal of Cd (II) ion from waste water by adsorption onto polyaniline coated on sawdust

Mansour, M. A.; Ossman, M.E.; Farag, H.A.

doi:10.1016/j.desal.2011.01.037

Cited by 175 publications

(65 citation statements)

References 40 publications

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“…4) Hydrogen ion concentration is considered as one of the most important parameters that influences the adsorption behavior of metal ions in aqueous solutions. It affects the solubility of the metal ions in the solution and the degree of ionization of the adsorbate during the reaction (Mansour et al 2011;Nomanbhay and Palanisamy 2005). The pH level affects the network of negative charge on the surface of the biosorbing cell walls, as well as physicochemistry and hydrolysis of the metal.…”

Section: Sem and Sem-edax Analysismentioning

confidence: 99%

RETRACTED ARTICLE: Adsorptive removal of cadmium from aqueous media using Posidonia oceanica biomass: equilibrium, dynamic and thermodynamic studies

Krika

Azzouz

Ncibi³

2014

Int. J. Environ. Sci. Technol.

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Posidonia oceanica (L.), a marine biomass, has been used as an effective and efficient biosorbent for the removal of Cd(II) from aqueous media. The physicochemical properties of biosorbent were investigated by elemental analysis, BET surface area, FT-IR, SEM and EDX methods before and after adsorption. Batch adsorption experiments were carried out to investigate the effects of solution pH, dosage of biosorbent, contact time and temperature. The biosorbent exhibited the maximum uptake of 58.82 mg/g under the optimal adsorption condition. Kinetics experiments indicated that the pseudosecond-order model displayed the best correlation with adsorption kinetics data. Besides, experimental data could be better described by the Langmuir isotherm model. Desorption experiments were carried out to explore the feasibility of regenerating the biosorbent. The regeneration efficiency was 96.03 % using desorption agent of 0.2 M HCl. The thermodynamic parameters (DH 0 , DS 0 and DG 0 ) of the cadmium ion uptake onto P.O indicated that the process is endothermic and proceeds spontaneously. The findings of the present study indicate that P.O can be successfully used for separation of Cd(II) from aqueous solutions. The results suggested that the adsorbent is promising for use as an effective and economical adsorbent for Cd(II) ions removal.

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Section: Sem and Sem-edax Analysismentioning

confidence: 99%

RETRACTED ARTICLE: Adsorptive removal of cadmium from aqueous media using Posidonia oceanica biomass: equilibrium, dynamic and thermodynamic studies

Krika

Azzouz

Ncibi³

2014

Int. J. Environ. Sci. Technol.

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“…It is employed in many progressive applications, like rechargeable batteries, charge storage devices, protector shield in magnetic fields, sensors, biosensors, catalytic processes, microwave absorption, image processing and infrared optic applications because of its good combination of properties like low cost, ease of synthesis and environmental stability. 13 Polyaniline has also shown good potential for adsorbing heavy metals from the effluents. It contains a lot of imine and amine groups, which can chelate cationic metal ions as well as adsorb anionic metal species via electrostatic interactions or through hydrogen bonding.…”

Section: Introductionmentioning

confidence: 99%

Isothermal and Thermodynamical Modeling of Chromium (Iii) Adsorption by Composites of Polyaniline With Rice Husk and Saw Dust

Kanwal

Rehman

Mahmud

et al. 2012

J. Chil. Chem. Soc.

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The adsorption of Cr (III) from water by polyaniline composites with rice husk and saw dust of Eucalyptus camaldulensis has been investigated in this study. The surface of adsorbents was characterized by FT-IR. Effect of various operational conditions like agitation time, initial pH, adsorbent dose, particle size of composites and temperature were studied in batch mode. The suitability of the data was confirmed by Langmuir and Freundlich isotherms. Thermodynamic studies showed that adsorption of Cr (III) on these composites occur spontaneously. Rice husk and saw dust modified the morphology of polyaniline by preventing its aggregation and improving its adsorption capacity.

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“…The models are the pseudo-first order and pseudo-second-order models. The pseudo-first order kinetic model can be represented by Lagergren rate equation [23], log (q e -q t ) = logq e -…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…For the examination of the controlling mechanisms of adsorption process, such as chemical reaction, diffusion control and mass transfer [23][24], several kinetic models are used to test the experimental data. For the present study, two kinetic models were applied in order to understand the mechanism of adsorption of the dye onto the adsorbent.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Bimetallic Ion Exchange Material Titanium Tin Molybdate as an Efficient and Eco-friendly Adsorbent for the Removal of Methylene Blue from Aqueous Solution

Dhanitha¹,

Janardanan²

2014

IOSRJAC

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Removal of Cd (II) ion from waste water by adsorption onto polyaniline coated on sawdust

Cited by 175 publications

References 40 publications

RETRACTED ARTICLE: Adsorptive removal of cadmium from aqueous media using Posidonia oceanica biomass: equilibrium, dynamic and thermodynamic studies

RETRACTED ARTICLE: Adsorptive removal of cadmium from aqueous media using Posidonia oceanica biomass: equilibrium, dynamic and thermodynamic studies

Isothermal and Thermodynamical Modeling of Chromium (Iii) Adsorption by Composites of Polyaniline With Rice Husk and Saw Dust

Bimetallic Ion Exchange Material Titanium Tin Molybdate as an Efficient and Eco-friendly Adsorbent for the Removal of Methylene Blue from Aqueous Solution

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