Removal of trace Cd2+ using continuous multistage ion foam fractionation. Part III—Effect of salt addition

Rujirawanich, Visarut; Chavadej, Sumaeth; O’Haver, John H.; Rujiravanit, Ratana

doi:10.1016/j.colsurfa.2011.06.006

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…In Egypt different types of soils were used to determine their capacity to hold several types of metals [ 8 – 16 ]. Addition of salts to the soil has been used to change the charge and general environment of the soil and to alter the adsorption characteristics toward heavy metals [ 17 – 21 ]. Cadmium is a toxic metal occurring in the environment naturally and coming from different sources mainly from industrial and agricultural sources.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Chloride and Sulfate Ions on the Adsorption of Cd²⁺on Clay and Sandy Loam Egyptian Soils

El‐Hefnawy

Selim

Assaad

et al. 2014

The Scientific World Journal

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Adsorption of Cd2+ on two types of Egyptian soils: clay (alluvial) and sandy loam (calcareous), was studied. Effect of changing the matrix electrolyte type and concentration was used to mimic the natural soil salts. Kinetics and thermodynamic parameters of the adsorption were calculated at two different electrolyte concentrations: 0.05 N and 0.15 N. The adsorption was described by Langmuir and Freundlich isotherms. Results showed that lower concentration of the NaCl or Na2SO4 electrolytes (0.05 N) had higher adsorption capacity. Also, the maximum adsorption of cadmium when using sulfate counter ion is about two to three times higher than that when using chloride (544 μg/g for alluvial soil and 170 μg/g for calcareous soil when using 0.05 N). Using NaCl as matrix electrolyte, Freundlich isotherms showed bi-linear fits that probably mean a two energy level adsorption. This might be explained by either the competition of Cd2+ with Na+ or its complexation with Cl−.

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Section: Introductionmentioning

confidence: 99%

The Effect of Chloride and Sulfate Ions on the Adsorption of Cd²⁺on Clay and Sandy Loam Egyptian Soils

El‐Hefnawy

Selim

Assaad

et al. 2014

The Scientific World Journal

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“…This is a major disadvantage of the foam separation process in comparison with solvent extraction, where non-target species are preferentially removed in a multistage operation. Many attempts have been made to overcome this problem by adding a reflux [13,15,17], operating in multi-stage mode [14,20,102], installing various partitions in the column [18,19,21,74] and incorporating ultrasonic generation [79,101].…”

Section: Introductionmentioning

confidence: 99%

Foam Separation of Metal Ions and the Potential ‘Green’ Alternative to Solvent Extraction

Kinoshita

Nii

2012

SERDJ

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Foam separation has been applied to recover or remove various substances from dilute aqueous solutions in various industries because it is an environment-and cost-friendly process. The literature has been reviewed focusing on the separation of metal ions.From an operational point of view, various methods are discussed for the removal of metal ions from solution, and on the selective recovery of a specific target metal ion.The former applications are designed to purify industrial effluents, and the performance of foam separation is well proven. The latter examples are aimed at recovering valuable metals, which has been shown to be difficult due to the inherent problem of contamination in foam separation. An operation mode was developed to overcome this problem and to enhance the selectivity for separating a specific target metal from solutions containing multi-metals. The method, called continuous counter-current foam separation, was developed, and its performance was demonstrated by the experimental results for Ga(III) separation. Since both high selectivity and recovery was obtained by this method, foam separation is potentially a "solvent-free" alternative to solvent extraction.

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Evaluation of ion separation coefficients by foam flotation using a carboxylate surfactant

Micheau

Schneider

Girard

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Removal of trace Cd2+ using continuous multistage ion foam fractionation. Part III—Effect of salt addition

Cited by 8 publications

References 37 publications

The Effect of Chloride and Sulfate Ions on the Adsorption of Cd²⁺on Clay and Sandy Loam Egyptian Soils

The Effect of Chloride and Sulfate Ions on the Adsorption of Cd²⁺on Clay and Sandy Loam Egyptian Soils

Foam Separation of Metal Ions and the Potential ‘Green’ Alternative to Solvent Extraction

Evaluation of ion separation coefficients by foam flotation using a carboxylate surfactant

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Removal of trace Cd2+ using continuous multistage ion foam fractionation. Part III—Effect of salt addition

Cited by 8 publications

References 37 publications

The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+on Clay and Sandy Loam Egyptian Soils

The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+on Clay and Sandy Loam Egyptian Soils

Foam Separation of Metal Ions and the Potential ‘Green’ Alternative to Solvent Extraction

Evaluation of ion separation coefficients by foam flotation using a carboxylate surfactant

Contact Info

Product

Resources

About

The Effect of Chloride and Sulfate Ions on the Adsorption of Cd²⁺on Clay and Sandy Loam Egyptian Soils

The Effect of Chloride and Sulfate Ions on the Adsorption of Cd²⁺on Clay and Sandy Loam Egyptian Soils