(2012) Tavallali et al. Clean - Soil, Air, Water. A sensitive, reliable, and environmentally friendly method for simple separation and preconcentration of Ag(I) traces in …Web
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A simple method for separation/preconcentration and determination of Ag (I) in aqueous samples is described. The method is based on formation of an ion‐associate between Ag …Web
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Low-grade and high-reserve scheelite, which is associated with calcite, has similar surface properties that cause difficulty in separation. In this study, sulfomethylated kraft lignin (SMKL) was used as a novel eco-friendly inhibitor for the flotation separation of scheelite and calcite. The flotation test results showed that 60 mg/L SMKL had a …Web
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H. Tavallali, S. Lalehparvar, A-R. Nekoei, K. Niknam, "Ion-flotation separation of Cd(II), Co(II) and Pb(II) traces using a new ligand before their flame atomic absorption spectrometric determinations in colored hair and dryer agents of paint", J. Chin. Chem.Web
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Ion-flotation Separation of Cd(II), Co(II) and Pb(II) Traces Using a New Ligand before Their Flame Atomic Absorption Spectrometric Determinations in Colored Hair and Dryer Agents of Paint Hossein Tavallali, Corresponding Author [email protected] …Web
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The extraction and preconcentration of a metal complex via surfactant-mediated phase separation was studied. A sensitive, selective and low-cost methodology for the determination of micro amounts of thorium, lanthanum and yttrium ions, using Eriochrome Cyanine R (ECR) with a flotation step prior to spectrophotometric determination was …Web
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Single mineral flotation tests were carried out in a XFG laboratory flotation machine. The impeller speed was fixed at 1800 r/min. The flotation reagents used in this study were supplied by Tianjin Kemiou Chemical Reagent Co., Ltd (Tianjin, China). The pH value was measured by PHS-3C acidometer built by Shanghai Leici Company …Web
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Porphyry-type deposits are the major sources of copper and molybdenum, and flotation has been adopted to recover them separately. The conventional reagents used for depressing copper minerals, such as NaHS, Na2S, and Nokes reagent, have the potential to emit toxic H2S gas when pulp pH was not properly controlled. Thus, in this study the …Web
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As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related …Web
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[22] H. Tavallali, S. Lalehparvar, A. Nekoei, K. Niknam, Ion-flotation separation of Cd(II), Co(II) and Pb(II) traces using a new ligand before their flame atomic absorption spectrometric determina-Web
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The recycling of spent lithium-ion batteries (LIBs) has attracted great attention, mainly because of its significant impact on resource recycling and environmental protection. Currently, the processes involved in recovering valuable metals from spent LIBs have shown remarkable progress, but little attention has been paid to the effective …Web
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The study of the depression effect of non-toxic depressants on the flotation separation of chalcopyrite from galena is of great importance for both industrial applications and theoretical research. The mixed depressant (DFinal) of four common inhibitors—sodium carboxymethyl cellulose, sodium silicate, sodium sulfite, and zinc sulfate—exhibited high …Web
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Fluorite and scheelite, which are strategic calcium-bearing minerals, have similar active sites (Ca2+); as a result, the efficient separation of the two minerals is still one of the world's most difficult problems in the field of flotation. In this work, N-decanoylsarcosine sodium (SDAA), a non-toxic and low-cost amino acid surfactant, was …Web
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All experiments of flotation separation were conducted under the conditions of pretreatment time 5 min, temperature 25 °C, (CH 2 COH) 2 10 mL, KOH 2 g, and ultrasonic power 160 W. As shown in Fig. 7a, the flotation percentage of ABS, PC, and PVC plastics gradually increase with the increasing flotation time, and plateaus at …Web
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The traditional hematite depressant starch has the disadvantages of poor solubility and high viscosity. In this study, a novel hematite depressant, pullulan, with better performance and flotation …Web
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A simple, rapid and inexpensive method for separation and preconcentration of some traces of hazardous elements is presented prior to their flame atomic absorption …Web
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As opposed to settling, flotation is a solid–liquid separation technique that is applied to particles whose density is lower or has been made lower than the …Web
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The Wushan Operation has been studied as a case study, particularly relevant to the copper-molybdenum separation circuit, in which efforts have been made to improve the quality of the molybdenum concentrate through diagnostic analysis. A key finding has been the appearance of coarser silicate minerals in the molybdenum …Web
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Feldspar minerals (KAlSi 3 O 8, NaAlSi 3 O 8, CaAl 2 Si 2 O 8) are the most abundant of aluminosilicate rock forming minerals, comprising 60% of the earth's crust.They are widely applied in the production of glass, ceramics, and as fillers and extenders [1,2] in the paper and paint industries.In order to improve the purity or the whiteness of feldspar, …Web
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1. Introduction Iron ores, such as hematite, magnetite, specularite, etc., are the basic materials of the iron and steel industries. 1,2 Due to the fast development of the economy and urbanization, the consumption of iron and steel requires more efficient separation methods to improve the grade of the ore. 3 Froth flotation has been proven to be one of …Web
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A flotation method for simultaneous separation of cobalt and nickel traces from fresh water is proposed. Lead(II) hexamethylenedithiocarbamate, Pb(HMDTC)2, was used as a new collector for the ...Web
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(2012) Tavallali et al. Clean - Soil, Air, Water. A sensitive, reliable, and environmentally friendly method for simple separation and preconcentration of Ag(I) traces in aqueous samples is presented prior to their flame atomic absorption spectrometric determinations. At pH 7.0, Ag(I) was separat...Web
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The first flotation separation for the rejection of magnesite was reported by Doerner and Dwigh (1930s) [].Flotation of Mg carbonates is typically carried out by using fatty acids, since these collectors give insoluble complexes with all divalent cations [].Determination of the appropriate depressing reagents for sinking valuable minerals in …Web
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A rapid flotation method for cobalt and copper separation and enrichment from fresh waters is established. At pH 6.0, ionic strength of 0.02 mol/l, using sodium dodecylsulfate as a foaming reagent ...Web
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A simple flotation separation and preconcentration for determination of trace amount of iron (III) and cobalt (II) in biological samples by using flame atomic absorption …Web
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H. Tavallali; J. Heidari; A simple flotation separation and preconcentration for determination of trace amount of iron (III) and cobalt (II) in biological samples by using flame atomic absorption ...Web
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The advent of flotation separation, more than a century ago, revolutionized the mining industry since it led to the possibility of a beneficiating complex, difficult-to-process ores, which were not amenable to successful separation by other known techniques such as gravity separation. Today about two billion tons of ore are …Web
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ETAAS METHOD FOR COPPER DETERMINATION IN FRESH WATERS FOLLOWING FLOTATION SEPARATION BY COBALT (III) …Web
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The importance of the flotation process to the economy of the whole industrial world is considered enormous. Without this process, many familiar metals and inorganic raw materials would be exceedingly scarce and costly because the high-grade ores that could be processed by simple physical and mechanical methods have long …Web
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FLOTATION. A.V. Nguyen, in Encyclopedia of Separation Science, 2007 Industrial Applications of Flotation. Flotation has been used by mineral and chemical engineers for the separation and concentration of aqueous suspensions or solutions of a variety of minerals, coal, precipitates, inorganic waste constituents, effluents, and even …Web
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Natural graphite ores are usually upgraded by froth flotation. However, complex processes with multistage grinding and flotation are required to achieve decent liberation and separation of graphite and gangue minerals. This study reports a short and improved flotation process for fine flake graphite ore by employing a thickening stage. …Web
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During flotation, the following reagents were used: sodium sulfide (Na 2 S) for sulfidization of minerals, zinc sulfate (ZnSO 4 *7H 2 O) and sodium cyanide (NaCN) for depression of zinc minerals and pyrite. Sodium butyl xanthate (C 4 H 9 OS 2 Na) is used as a collector; oxal T-92 (CH 3 CHOHCH 3) is used as a frother.Before each flotation run, …Web
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Flotation separation of chalcopyrite and molybdenite is an enormous challenge faced by mineral processing, since chalcopyrite is usually closely associated with molybdenite in porphyry copper-molybdenum deposits. Similar flotability of chalcopyrite and molybdenite caused by the residual of pre-adsorbed xanthate on the surface of …Web
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