Investigations of Kinetics of Removal of Trivalent Chromium Salts from Aqueous Solutions Using lon and Precipitate Flotation Methods

Kawalec-Pietrenko, B.; Selecki, A.

doi:10.1080/01496398408058345

Cited by 6 publications

(10 citation statements)

References 3 publications

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“…where c 0 and c ∞ are concentrations of Al(III), Cu(II), or Zn(II) in the initial solution and in the solution when the flotation is finished (concentration does not change any further), respectively. The courses of ion and precipitate flotations were recorded as changes in temporary removal ratio (R τ ) during the flotation time (τ) [20,29,48]:…”

Section: Methodsmentioning

confidence: 99%

“…where c is the temporary concentration of Al(III), Cu(II) or Zn(II) in the solution during flotation. Based on our own as well as published experimental results [20,29,44,[48][49][50][51][52], it is known that the kinetics of ion and precipitate flotations of metal ions can be described by Equation 4, which is analogous to the first-order reaction rate equation:…”

Section: Methodsmentioning

confidence: 99%

“…Ion flotation is based on the separation of surface-inactive (colligend) ions from aqueous solutions by means of surface-active substance. The colligend ions interact with oppositely charged functional groups of surfactants at the gas-liquid interface [20]. Thus, successful realization of ion flotation results from stoichiometry of the above described reaction, which ensures the electrical neutrality of the formed compound.…”

Section: Effect Of Collector Concentration On the Flotation Efficiencymentioning

confidence: 99%

“…Therefore, a competition for the gas-liquid interface area between the floatable aggregates and the free collector ions is observed in the system. Free collector ions are smaller than micelle-collector aggregates and thus these free collector ions are preferentially adsorbed at the gas-liquid interface [20]. This results in a decrease in the values of Al(III), Cu(II), and Zn(II) flotation rate constants with the increase in the collector concentration.…”

Section: Effect Of Collector Concentration On the Flotation Rate Consmentioning

confidence: 99%

“…By adding a surfactant as a collector, the surface-active ions are adsorbed onto the hydroxide-charged micelles, neutralizing the electric charge and making the particle surface hydrophobic. The aggregates formed in this way and adsorbed on the surface of gas bubbles can be flotated [19,20]. previously investigated as a research object for ion and precipitate flotation.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous Removal of Al, Cu and Zn Ions from Aqueous Solutions Using Ion and Precipitate Flotation Methods

Rybarczyk

Kawalec-Pietrenko²

2021

Processes

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This paper presents the results of investigations concerning the simultaneous removal of Al(III), Cu(II), and Zn(II) from dilute aqueous solutions using ion and precipitate flotation methods. The effects of initial solution pH, surface active substance concentration, and the gas velocity on the flotations’ efficiency and course are studied. Experimental results are discussed in terms of physicochemical aspects related to aqueous solutions of metal salts. The results indicate that satisfying simultaneous flotations of aluminum, copper and zinc species are observed if the pH value ranges between 7.0 and 9.0. It was found that an increase in collector concentration results in a decrease in the flotation rate constants. An increase in the gas velocity results in an increase in the ion and precipitate flotation rates.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Effect Of Collector Concentration On the Flotation Efficiencymentioning

confidence: 99%

Section: Effect Of Collector Concentration On the Flotation Rate Consmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Simultaneous Removal of Al, Cu and Zn Ions from Aqueous Solutions Using Ion and Precipitate Flotation Methods

Rybarczyk

Kawalec-Pietrenko²

2021

Processes

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Studies on Separation of Heavy Metals from Acidic Solutions by Foam Fractionation with Respect to an Application on Acidic Soil Extracts

Wömmel

Calmano

1992

Acta hydrochim. hydrobiol.

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An experimental investigation is presented on the batch foam fractionation of the heavy metal cations PbZ+, Cd2+, Cuz+, Sb3+ and As5+ from diluted aqueous solutions with hexamethylenedithiocarbamate (HMDC) as complexing agent and sodiumdodecylsulfate (SDS) as surfactant. Among the considered pH-values of 2,4 and 7 the pH 2 experiments allow a direct application of foam fractionation on acidic extracts from heavy metal contaminated soil. The experiments at pH 2 and pH 4 show better results than those at hexamethylenedithiocarbamate, surfactants neutral pH. Although a simple device was used, a maximum enrichment factor of 13.8 and a minimum removal factor of 0.01 have been measured. The flotation with weak organic acids like citric acid (CA) and acetic acid (AA) show about 50 -70% smaller enrichment factors than those acidified with hydrochloric acid. The dissolution and mixing of the reacting components as well as the concentration of the detergent and the gaseous volume flow can be regarded as basic parameters of foam fractionation. * Dip1.-Ing. Simone Wommel, P. D. Dr.-Ing. habil. Wolfgang Calmano, Technische Universitat Hamburg-Harburg, Arbeitsbereich Umweltschutztechnik, Eissendorferstr. 40, W-2100 Hamburg 90, Germany Correspondence to W. Calmano Acta hydrocbim. hydrobiol. 20 (1992) 5, m-m 0 VCH Verlagsgesellschaft mbH, D-6940 Weinheim, 1992 0323-4320/92/0511-0265 $03.50+25/0

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Removal of arsenic from geothermal fluids by adsorptive bubble flotation with colloidal ferric hydroxide

Carlo¹,

Thomas²

1985

Environ. Sci. Technol.

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Investigations of Kinetics of Removal of Trivalent Chromium Salts from Aqueous Solutions Using lon and Precipitate Flotation Methods

Cited by 6 publications

References 3 publications

Simultaneous Removal of Al, Cu and Zn Ions from Aqueous Solutions Using Ion and Precipitate Flotation Methods

Simultaneous Removal of Al, Cu and Zn Ions from Aqueous Solutions Using Ion and Precipitate Flotation Methods

Studies on Separation of Heavy Metals from Acidic Solutions by Foam Fractionation with Respect to an Application on Acidic Soil Extracts

Removal of arsenic from geothermal fluids by adsorptive bubble flotation with colloidal ferric hydroxide

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