Recovery of metals by ion exchange process using chelating resin and sodium dithionite

Botelho, Amilton Barbosa; Vicente, André de Albuquerque; Espinosa, Denise Crocce Romano; Tenório, Jorge Alberto Soares

doi:10.1016/j.jmrt.2019.07.059

Cited by 34 publications

(11 citation statements)

References 16 publications

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“…This occurred because the chelating resin was deprotonated when the pH increased, which decreases the selectivity of the resin. As a result, the adsorption of metals in a higher concentration (such as iron, nickel, and aluminum) increased and occupied the active sites of the resin …”

Section: Resultsmentioning

confidence: 99%

“…Botelho Junior et al studied the adsorption of metals from a similar solution by the iminodiacetate functional group in pH from 0.5 to 3.5. The ferric iron was converted to ferrous iron by a reducing process.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the adsorption of metals in a higher concentration (such as iron, nickel, and aluminum) increased and occupied the active sites of the resin. [35] The thermodynamics of copper adsorption was studied for temperatures of 25 C, 35 C, 45 C, and 60 C. The experiments were carried out at pH 1.5 for 120 minutes. The results for the copper, nickel, and iron adsorption are presented in Table 4.…”

Section: The Kinetic Effect Of Ph and Thermodynamic On Metals Adsormentioning

confidence: 99%

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Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

et al. 2019

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The waste product from the hydrometallurgical processing of nickel laterite ores can contain valuable metals, making their recovery economically viable. However, the high‐impurities content, mainly iron, makes the process technically unfeasible. As a result, the separation of metals from the leach solution must be selective. Among the techniques available, the use of chelating resin is advantageous due to its selectivity and low energy consumption. Among the commercial chelating resins available, Dowex XUS 43605 has been shown to be highly selective for copper and can be used with a high impurities content. Although there are studies on the use of Dowex XUS 43605, none have evaluated a high impurities content and modelled a continuous process. For this reason, the aim of this work was to investigate copper recovery by a continuous process. The Dowex XUS 43605 chelating resin with HPPA functional group was used in ion‐exchange experiments. Column experiments were performed in two steps: loading (to recover copper) and elution (to obtain a copper‐rich solution). The removal of iron and the subsequent collection of copper were possible in a precipitation step using CaCO3. The results showed that the solution obtained from elution had a copper concentration that was 10 times higher than in the loading. All of the iron was removed from the elution solution at pH 3.5 with 5% of copper losses. Copper precipitation was possible at pH 5.5. From the results obtained, a proposed flowsheet for recovering copper was suggested.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: The Kinetic Effect Of Ph and Thermodynamic On Metals Adsormentioning

confidence: 99%

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Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

et al. 2019

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“…Some challenges to be considered when using resins for mine water treatment are the hydraulic blocking of the material due to the presence of colloids in the water or their formation by the oxidation of iron, manganese, or other metals [8]. The variation of pH in the process, depending on the type of exchange material, and the presence of calcium and sulfates in the water can develop secondary precipitations, which considerably reduce the capacity of the resin, modify the water flow inside the exchange column, and reduce the recovery process efficiency [9]. However, these difficulties can be minimized with proper pretreatment of the water, monitoring of process parameters, and upward flow of the inlet solution [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…However, surprisingly little information is available regarding the selective removal of metals from mine waters using manufactured resins [20]. Chelating resins have been developed for a broad range of applications using mine waters due to their high exchange capacity and remarkable performance at low pH values [9,21,22]. In addition, weakly basic resins with a chelating bis-picolylamine functional group possess high selectivity for metal ions with economic potential such as copper, zinc, and nickel captured from acidic solutions [23,24].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Ion Exchange Processes to Optimize Metal Removal from Complex Mine Water Matrices

Montes

Abeywickrama

Hoth

et al. 2021

Water

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The modeling of ion exchange processes could significantly enhance their applicability in mine water treatment, as the modern synthetic resins give unique advantages for the removal of metals. Accurate modeling improves the predictability of the process, minimizing the time and costs involved in laboratory column testing. However, to date, the development and boundary conditions of such ion exchange systems with complex mine waters are rarely studied and poorly understood. A representative ion exchange model requires the definition of accurate parameters and coefficients. Therefore, theoretical coefficients estimated from natural exchange materials that are available in geochemical databases often need to be modified. A 1D reactive transport model was developed based on PhreeqC code, using three case scenarios of synthetic mine waters and varying the operating conditions. The first approach was defined with default exchange coefficients from the phreeqc.dat database to identify and study the main parameters and coefficients that govern the model: cation exchange capacity, exchange coefficients, and activity coefficients. Then, these values were adjusted through iterative calibration until a good approximation between experimental and simulation breakthrough curves was achieved. This study proposes a suitable methodology and challenges for modeling the removal of metals from complex mine waters using synthetic ion exchange resins.

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Advances in Bioleaching of Rare Earth Elements from Electronic Wastes

Zhang,

Tan,

Rastegar

et al. 2023

Management of Electronic Waste

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Recovery of metals by ion exchange process using chelating resin and sodium dithionite

Cited by 34 publications

References 16 publications

Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

Modeling of Ion Exchange Processes to Optimize Metal Removal from Complex Mine Water Matrices

Advances in Bioleaching of Rare Earth Elements from Electronic Wastes

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