Kinetics of Cu²⁺Separation by Flotation

Abstract

Precipitate flotation is one of the most efficient and economic separation methods that has been widely applied in the last few years for ionmolecular and colloidal species, both representing pollutant and useful substances.The separation of Cu 2þ aq species from diluted aqueous systems is often studied for environment protection and for the recovery of copper. A systematical study of the whole process has to consider the dynamics of the process in order to optimize it. This paper represents a study concerning the kinetics of Cu 2þ aq ions separation by precipitate flotation using alkylamine type (laurylamine) and alkylammonium salt (lauryltrimethylammonium chloride) as cationic collectors and alkylsulphate and alkylcarboxilic type(sodium laurylsulphate and sodium oleate) as anionic collectors. The experimental data 613 have been used in order to verify the classical first order model and three other first-order models, respectively, adjusted to the classical model. The experimental data have been analyzed with the PEAKFIT program.The results of the study sustain-by interpretation of the fitting parameters (the correlation coefficient, r, and the curve fit standard error, e)-a first-order kinetics for the separation process of Cu(II) hydroxide species by precipitate-flotation method.Among the studied kinetic models, the classical first-order model and the first-order reversible model is well fitting the experimental data, and the fully mixed reactor model describes, with acceptable errors, the Cu 2þ aq ions separation process by flotation.

Heavy metal removal from waste waters by ion flotation

“…It follows that the selectivity of the ion flotation process must be evaluated based on the relative recoveries of both the metal ions and water from the flotation cell. Though there are several studies on ion flotation [10][11][12][13][14][15][16][17][18][20][21][22][23][24], they lack information on the relative amounts of metal and water removals from the flotation cell. Therefore, the scope of this study was to investigate the optimum conditions for the removal of such highly toxic heavy metals as copper, zinc, silver and chromium from simulated industrial waste waters using ion flotation with special emphasis on the relative rates of metal and water removal from the flotation cell.…”

Kinetics of ion flotation of Co(II)–EDTA complexes from aqueous solutions

“…Assuming that all species have the same floatability, the classical first-order kinetic model is expressed by [22,25]: where is the recovery of species at time , * is the ultimate recovery of species for an infinite time and is the first-order rate for species (min −1 ).…”

“…Furthermore, determination of the removal rate is useful for practical application of the ion flotation process. For wastewater treatment applications, the examination of the flotation kinetics has attracted the researchers' interest for many years [17][18][19][20][21][22][23][24]. However, up to date, none of them have studied the ion flotation kinetics of Co(II)-EDTA complexes from aqueous solutions.…”

Ambient Temperature Flotation of Sedimentary Phosphate Ore Using Cottonseed Oil as a Collector

“…collector type, pulp temperature, collector dosage, and the recovery of P 2 O 5 in the phosphate flotation process, the data shown in Figure 1 was fitted to different flotation models, including a classical first-order model, fully mixed reactor model, and second-order kinetic model [18][19][20]. The statistical program Statgraphics Centurion (Statpoint Technologies, The Plains, VA, USA) was used to correlate data for the non-linear regression of each kinetic model [21].…”