Electrochemical treatment of copper from aqueous citrate solutions

Factors affecting electrolytic recovery of Cu(II) and citrate from complexed solutions were systematically examined. During electrolysis, the catholyte pH increases and the anolyte pH decreases due to the production of …

Simultaneous recovery of copper and surfactant by an electrolytic …

Simultaneous recovery of copper and surfactant by an electrolytic process from synthetic solution prepared to simulate a concentrate waste stream of a micellar-enhanced ultrafiltration process. ... The copper recovery and current efficiency at the end of the experiment (time = 5000 s) are shown in Fig. 3. ...

Separation and recovery of Cu and As from copper electrolyte …

It can be calculated from Tables 5 and 8 that the recovery rate of As in copper electrolyte is as high as 59.76%. The concentrations of As and Ni in the mother liquor are high. ... Hydrometallurgy, 2002, 66(1−3): 101−105. TOMITA M, HIAI H, ISHII T. Method of purifying copper electrolyteic solution: American, US 5783057[P]. 1998−07−21 ...

Direct recovery of copper from printed circuit boards (PCBs) …

After 15 h, apparent copper recovery from the PCB concentrate increased from 68% to 90% when the temperature was increased from 25 to 40 °C. For a 22 hour-electrolysis at 25 °C, the apparent copper recovery was 79% (0.77 g deposited), while at 40 °C the apparent recovery as electrolytic copper was approximately 97% (0.95 g …

Application of cationic membrane electrolysis on the recovery of copper …

Considering the decomposition of S 2 O 3 2− and recycling of electrolytic tailing solution, the ME technique was employed in the current work for the copper and silver recovery from thiosulfate solution. The operational parameters such as pH and ionic conductivity in anode compartment, electrode distance, cell voltage and electrolytic …

The sulfurization precipitation and competition mechanisms …

The mixed solutions of Cu(II) (500 mg/L) and As(V) (500, 5,000, 20,000, 30,000 and 50,000 mg/L) were obtained by dissolving solid of CuSO 4 and Na 2 HAsO 4 ·7H 2 O with different mass into H 2 SO 4 stock solution. Actual copper electrolyte was obtained from a copper smelting plant in Inner Mongolia, China.

(PDF) Direct copper recovery from pregnant leaching solutions …

The removal of copper from sludge was up to 96%, and the recovery in the form of copper foil via electrodeposition was 57% under optimized conditions (current density of 50 mA/cm 2, pH solution ...

Electrolytic recovery of binary metals and EDTA from …

Electrolytic recovery of binary Cu(II) and Pb(II) from solutions containing strong complexing agent EDTA (ethylenediaminetetraacetic acid) was studied in a two-chamber cell separating with a cation exchange membrane Neosepta CM-1. ... Juang R. S. and Lin L. C. (2000) Treatment of complexed copper(II) solutions with electrochemical …

Extracting of copper from simulated leaching solution of copper …

1. Introduction. Copper is widely used and has been an indispensable raw material for industries, such as electrical, light industry, machinery manufacturing, construction industry, transportation and defense industry (Zhai, 2011a, Zhai, 2011b, Zhai, 2011c).At present, the main electrolytic methods from high copper ion solutions …

Copper Recovery From Ammonia Solutions Through Electro …

This treatment is beneficial for copper recovery because it allows the formation of soluble amines complexes, with cupric tetramine ( Cu(NH3)2+4) being the …

Selective recovery of copper from electroplating sludge by …

Plot of voltage, duty cycle, pH and electrolyte flow rate against copper recovery.(a) The effect of voltage on the recovery of copper in the electrolyte. (b) The effect of duty cycle on the recovery of copper in the electrolyte. (c) The effect of initial pH value on the recovery of copper in the electrolyte.

The electrolytic recovery of copper from rod mill pickling solution …

Scott, James Walter, "The electrolytic recovery of copper from rod mill pickling solution at the Hawthorne works of the Western Electric Company, Incorporated" (1925). Professional Degree Theses . 108.

Recovery of copper from WPCBs using slurry electrolysis with ionic

Thus, the copper recovery (R Cu), current efficiency (η Cu) and Copper purity (P Cu) were calculated according to the following equations: (1) R Cu = W O + W E − W A W S where W O is the copper obtained on the cathode (g); W E is the copper in electrolyte (g); W A is the copper added in CuSO 4 5H 2 O (g); W S is the weight of …

Electrolytic Recovery of Nickel and Copper from Acid Pickling Solutions

Request PDF | Electrolytic Recovery of Nickel and Copper from Acid Pickling Solutions Used to Treat Metal Surfaces | The increased use of heavy metals in process industries often results in the ...

Copper and nickel recovery from acidic polymetallic aqueous solutions …

After the electrolytic recovery of copper from aqueous solution, the effluents from the electrolytic cell will contain the initial amounts of Ni, Fe, Zn and Pb as well as residual Cu, As, Bi and Sb. Nickel is the most valuable metal in this solution and its recovery through neutralization is of great importance.

(PDF) Direct copper recovery from pregnant …

The removal of copper from sludge was up to 96%, and the recovery in the form of copper foil via electrodeposition was 57% under optimized conditions (current density of 50 mA/cm 2, pH solution ...

Electrolytic recovery of dilute copper from a mixed …

In view of the measures exposed above, electrolytic treatment is a promising process that has been investigated as an alternative to treat wastewaters since the early 1960s [3] without producing or with minimum quantities of sludge [4] permitting the recovery of metal along with the oxidation of organic contaminants in solution with …

Electrolytic recovery of gold from aqueous solutions

Currently, most of the copper, gold, nickel and zinc is processed, recovered, or refined by electrowinning [32,33]. While the electrowinning process of gold from cyanide solutions is a widely known process [28,34,35], the recovery of gold from copper ammoniacal thiosulfate solutions is more controversial.

Electrolytic recovery of dilute copper from a mixed …

Investigations have been carried out in the raw effluent (∼1450 mg l −1 of Cu) under galvanostatic condition in a batch electrolytic undivided cell. In order to obtain maximum copper recovery, experiments were conducted at 1 A dm −2 of low hydrogen evolution condition by varying the temperatures (Fig. 2).The depletion of the copper …

Electrolytic recovery of dilute copper from a mixed …

The recovery of copper from solution containing Direct Blue 80 (C.I. 24315), a common metal-complex dye, was examined using ion exchange preceded by oxidative pretreatment using ozone (O3) alone ...

Recovery of Copper, Cobalt, Nickel, Cadmium, Zinc and …

An electrolytic Copper Solution (ECS) was electrolyzed using platinum electrodes. Copper was obtained in solid form. In order to precipitate Cd(II), Bi(III), As(III), Sb(III) …

Electrolytic Recovery of Nickel and Copper from Acid …

Electrolytic Recovery of Copper and Zinc from Brasses

which copper can be extracted from solution, a test was run on a copper sulfate solution. Six cells were set up, the anodes and cathodes of such size that, with a current of .3 amperes, the current density of the solutions would be eighteen, fifteen, twelve, nine, six, and three amperes per square foot.

Examining regeneration technologies for etching solutions: …

Zhao et al. (2011) patented an online electrolyzation regeneration method, which formed a loop, not only saving costs but also recovering copper from the etching solution. Copper ion regeneration electric efficiency was greater than 98%, cathodic deposition of copper recovery efficiency more than 95%, and copper purity higher than 99% (Zhao et ...

Recovery of copper and water from copper-electroplating wastewater …

2.2. Methods and analysis. As shown in Fig. 1, the EL–ED combination process was designed for treating copper-electroplating wastewater with different copper concentration.If high concentration copper wastewater (HCW), for instance, Cu 2+ concentration was >300 mg/L. The HCW was firstly fed into Tank-1, and then pumped …

Electrolytic recovery of dilute copper from a mixed industrial …

Investigations have been carried out in the raw effluent (∼1450 mg l −1 of Cu) under galvanostatic condition in a batch electrolytic undivided cell. In order to …

Recovery of Precious and Secondary Metals from …

The raw slime, pumped with a minimum amount of cell solution from the electrolytic copper refinery, is discharged into the center of circular settling tanks 15 ft. in diameter by 8 ft. deep, where the slime settles out and the solution overflows peripherally to return to the copper refinery by gravity.

Collective Recovery of Copper and Silver from Secondary Copper …

In this study, the effect of copper and silver low-temperature leaching from secondary copper electrolytic refining slime with the sulfuric acid solution was investigated. Herein, the relevance of copper and silver collective recovery from secondary copper electrolytic refining slime was verified at the initial stage of their …

Application of cationic membrane electrolysis on the …

At optimal experimental conditions, the recovery efficiency of copper reached more than 99%, with energy consumption of 1.58 W h/g Cu, while less than …