Related Papers
Physicochemical Problems of Mineral Processing
Ion flotation and its applications on concentration, recovery, and removal of metal ions from solutions
Fatma Arslan
Minerals Engineering
Removal of heavy metal ions by adsorptive particulate flotation
1997 •
Jorge Rubio
AIChE Journal
Electrokinetic study of the role of modifying agents in flotation of salt-type minerals
1986 •
David Shonnard
Development and testing of ion exchangers for treatment of liquid wastes at Oak Ridge National Laboratory
1993 •
DD Ensor
Ingeniería e Investigación
Removal of Sulfate Ions by Precipitation and Flotation
Mario Santander
The removal of sulfate ions from natural waters, as well as from industrial effluents of different origins, is a problem, considering that most of the proposed processes are inefficient and have a high cost, mainly when reducing the sulfate ion concentration to values below 500 mg.L−1 is required. The flotation technique, combined with precipitation, has proven to be efficient for the removal of heavy metal ions. However, there is not enough research to confirm its efficiency for the removal of sulfate ions. This article presents the results of sulfate ion removal from synthetic solutions prepared in an acidic medium, applying the co-precipitation techniques with polyaluminum chloride (PAC) and solid/liquid separation by dissolved air flotation (DAF). The effect of the pH, the [PAC: sulfate ions] ratio, the effect of saturated water flow with air, and the flocculant and collector doses were studied. The achieved results confirm that it is possible to reduce the concentration of sulf...
Environmental Technology & Innovation
Removal of heavy metal ions from water using ion flotation
2017 •
Moji Taseidifar
Chemical Engineering Research and Design
Evaluation of electrocoagulation process for the removal of strontium and cesium from aqueous solution
2014 •
Subramanyan Vasudevan
ABSTRACT The present research work deals with an evaluation of electrocoagulation process for the removal of radioactive contaminants like strontium and cesium from water using different anode materials like aluminum, iron, magnesium, and zinc with galvanized iron as cathode. The optimization of various operating parameters like effect of pH, current density, temperature, and inter-electrode distance on the removal efficiency of strontium and cesium were carried out. The results showed that the maximum removal efficiency of 97.0% and 96.8% was achieved for strontium and cesium respectively with magnesium as anode at a current density of 0.08 A/dm2 and pH of 7.0. First and second-order rate equations were applied to study adsorption kinetics. The adsorption process follows second order kinetics model with good correlation. Langmuir and Freundlich adsorption isotherm model were studied using experimental data. The Langmuir adsorption isotherm favors monolayer coverage of adsorbed molecules for adsorption of strontium and cesium. Temperature studies showed that adsorption was endothermic and spontaneous in nature.
Sustainability
Effect of Ether Mono Amine Collector on the Cationic Flotation of Micaceous Minerals—A Comparative Study
Hossein Mohammadi-Manesh
Micaceous minerals, known as layer silicates, are counted mostly as the gangue minerals associated with valuable minerals, especially iron oxides. They mainly reject through the reverse flotation process using the cationic collectors, e.g., ether amines, to improve process sustainability. Although ether amines have been applied for floating the wide range of silicates, few investigations explored their adsorption behaviors on the micaceous minerals. In this study, flotation of phlogopite, biotite, and quartz (for comparison purposes) in the presence of Flotigam®EDA (EDA) (commercial ether monoamine collector), at pH 10 was investigated through the single mineral micro–flotation experiments. Adsorption behaviors were explored by the contact angle, residual surface tension measurements, and zeta potential analyses. Micro–flotation outcomes indicated that the quartz floatability was more than phlogopite and biotite. In the presence of 30 mg/dm3 EDA, their recoveries were 97.1, 46.3, an...
Minerals
Sulphate Removal from Flotation Process Water Using Ion-Exchange Resin Column System
Zafir Ekmekçi
Water chemistry is one of the most important parameters affecting flotation performance. Various types of ions can dissolve and accumulate in process water depending on ore mineralogy, reagent scheme, grinding medium and chemistry of mine site water. Sulfur-based ions (sulfate, thiosulfate, polythionate) are generally observed in flotation of sulfide ores. High concentrations of these ions may reduce efficiency of the flotation process, causing scale problems. Removal of these ions from process water often requires complex water treatment plants with high capital and operating costs. In this study, partial cleaning of water was investigated as an alternative approach for decreasing high sulphate concentrations of 3000–3800 mg/L down to 1000–1500 mg/L, an acceptable concentration for most sulfide ore flotation plants, by using an ion-exchange resin. For this purpose, detailed adsorption tests were performed using a laboratory-scale column system to determine the most suitable type of...
Separation & Purification Reviews
Recovery of Metals by Ion Flotation from Dilute Aqueous Solutions
1991 •
Paul Mavros
